fix: Add isolation between string and hyperloglog( issue#2719) #2720
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WalkthroughThe recent updates primarily enhance the HyperLogLog support and replication functionalities within the system. Significant changes include modifications to command arities, addition of new HyperLogLog methods, integration into the Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant CommandHandler
participant Storage
participant Redis
Client->>CommandHandler: Send PfMergeCmd
CommandHandler->>Storage: Invoke HyperloglogGet for key
Storage->>Redis: Call HyperloglogGet
Redis-->>Storage: Return value
Storage->>CommandHandler: Process value
CommandHandler->>Client: Return result
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Actionable comments posted: 2
Outside diff range and nitpick comments (1)
tests/unit/type/multi.tcl (1)
1-9: Parameterize the hardcoded values inwait_for_dbsize.Consider making the number of attempts and the delay between checks parameters of the function to increase its flexibility and reusability.
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (12)
- src/pika_kv.cc (1 hunks)
- src/storage/src/base_value_format.h (1 hunks)
- src/storage/src/hyperlog_value_format.h (1 hunks)
- src/storage/src/redis.h (5 hunks)
- src/storage/src/redis_hyperloglog.cc (2 hunks)
- src/storage/src/redis_strings.cc (6 hunks)
- src/storage/src/storage.cc (6 hunks)
- src/storage/src/type_iterator.h (2 hunks)
- tests/assets/default.conf (3 hunks)
- tests/unit/type/geo.tcl (1 hunks)
- tests/unit/type/hll.tcl (1 hunks)
- tests/unit/type/multi.tcl (1 hunks)
Files not summarized due to errors (1)
- tests/unit/type/geo.tcl: Error: Message exceeds token limit
Additional comments not posted (46)
src/storage/src/hyperlog_value_format.h (2)
20-39: Implementation ofHyperlogValuelooks correct and adheres to the specified value format.
41-47:ParsedHyperlogValuecorrectly extendsParsedStringsValueto handle HyperLogLog specific parsing.src/storage/src/base_value_format.h (3)
21-24: The addition ofkHyperlogto theDataTypeenum and updates to related arrays are correctly implemented.
21-24:InternalValueclass provides robust handling and memory management for database value types.
21-24:ParsedInternalValueclass correctly implements parsing and management of database values, including staleness checks.tests/unit/type/hll.tcl (1)
1-290: The tests inhll.tclprovide comprehensive coverage of HyperLogLog operations and correctly handle edge cases, including corrupted data detection.src/storage/src/redis_hyperloglog.cc (1)
48-223: The methods inredis_hyperloglog.cccorrectly implement the Redis commands for HyperLogLog management, with appropriate error handling and thread safety measures.src/storage/src/type_iterator.h (1)
145-175: The implementation ofHyperlogIteratoris consistent with other type-specific iterators and correctly overrides theShouldSkipmethod to ensure it only processes Hyperlog data types. Good use of inheritance and encapsulation.src/storage/src/redis.h (1)
125-125: The newly added Hyperlog methods (HyperlogExpire,HyperlogDel,HyperlogExpireat,HyperlogPersist,HyperlogTTL,HyperlogGet,HyperlogSet,ScanHyperlog, and the iterator creation for Hyperlog) are correctly implemented and follow the design pattern of existing methods for other data types. Ensure that these methods are tested thoroughly to handle edge cases specific to Hyperlog operations.Also applies to: 133-133, 140-140, 147-147, 154-154, 163-163, 178-178, 362-362, 399-399
tests/assets/default.conf (3)
41-46: The addition ofsync-binlog-thread-numensures that each database can have a dedicated thread for writing binlog, enhancing performance and consistency in replicated environments.
111-112: Reminder added to ensuresync-binlog-thread-numaligns with the number of databases is crucial for maintaining performance optimizations when database configurations are changed.
478-485: Introduction ofrsync-timeout-msandthrottle-bytes-per-secondwith dynamic adjustment capabilities significantly enhances control over replication load and prevents unnecessary retries during full synchronization.tests/unit/type/multi.tcl (13)
11-22: Test case "MULTI / EXEC basics" is well-implemented.The test case correctly initializes the list, uses MULTI, and checks the results of EXEC. The expected results are correctly specified.
24-34: Test case "DISCARD" is correctly implemented.The test case properly uses the DISCARD command within a transaction to ensure that changes are not committed, and verifies that the list still contains the original elements.
36-42: Test case "Nested MULTI are not allowed" is correctly implemented.The test case effectively captures and checks the error when attempting to nest MULTI commands, ensuring that such operations are correctly blocked.
44-49: Test case "MULTI where commands alter argc/argv" is well-implemented.The test case correctly handles a transaction where commands that can alter the state (like
spop) are used, and verifies the results accurately.
51-57: Test case "WATCH inside MULTI is not allowed" is correctly implemented.The test case effectively captures and checks the error when attempting to use WATCH inside a MULTI transaction, ensuring that such operations are correctly blocked.
88-97: Test case "If EXEC aborts, the client MULTI state is cleared" is well-implemented.The test case correctly handles the scenario where EXEC aborts, and verifies that the client state is cleared, as indicated by the successful response to a subsequent PING command.
99-105: Test case "EXEC works on WATCHed key not modified" is correctly implemented.The test case effectively sets up WATCH on multiple keys, starts a transaction, and verifies that EXEC completes successfully when the WATCHed keys are not modified.
396-404: Test case "DISCARD should clear the WATCH dirty flag on the client" is well-implemented.The test case correctly uses the DISCARD command within a transaction to clear the WATCH dirty flag on the client, and verifies this by checking the result of a subsequent operation on the key.
406-415: Test case "DISCARD should UNWATCH all the keys" is correctly implemented.The test case correctly uses the DISCARD command within a transaction to UNWATCH all keys, and verifies this by checking the result of a subsequent operation on the key.
227-235: Test case "It is possible to UNWATCH" is correctly implemented.The test case effectively demonstrates that the UNWATCH command works as expected by clearing the WATCH and verifying that a subsequent transaction completes successfully.
237-239: Test case "UNWATCH when there is nothing watched works as expected" is correctly implemented.The test case correctly demonstrates that the UNWATCH command completes successfully even when no keys are being watched.
251-258: Test case "FLUSHALL does not touch non affected keys" is correctly implemented.The test case effectively demonstrates that the FLUSHALL command does not affect keys that are not specified, as indicated by the successful completion of a transaction on a WATCHed key.
270-277: Test case "FLUSHDB does not touch non affected keys" is correctly implemented.The test case effectively demonstrates that the FLUSHDB command does not affect keys that are not specified, as indicated by the successful completion of a transaction on a WATCHed key.
tests/unit/type/geo.tcl (7)
1-5: Ensure the mathematical functions are correctly implemented.
6-14: Thegeo_distancefunction calculates the distance between two points on Earth. Ensure the formula used here is accurate and adheres to the Haversine formula.Verification successful
The
geo_distancefunction ingeo.tclappears to follow the Haversine formula correctly. Here is the breakdown:
Convert degrees to radians:
set lon1r [geo_degrad $lon1d] set lat1r [geo_degrad $lat1d] set lon2r [geo_degrad $lon2d] set lat2r [geo_degrad $lat2d]Calculate differences:
set v [expr {sin(($lon2r - $lon1r) / 2)}] set u [expr {sin(($lat2r - $lat1r) / 2)}]Apply the Haversine formula:
expr {2.0 * 6372797.560856 * \ asin(sqrt($u * $u + cos($lat1r) * cos($lat2r) * $v * $v))}The formula used in the
geo_distancefunction matches the Haversine formula, which is used to calculate the distance between two points on the surface of a sphere. The Earth's radius used (6372797.560856 meters) is also appropriate.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the accuracy of the geo_distance calculation. # Test: Manually calculate the distance between two known points and compare with the function output. echo "Manual calculation needed to verify the accuracy of the geo_distance function in geo.tcl."Length of output: 188
Script:
#!/bin/bash # Description: Verify the accuracy of the geo_distance calculation by comparing it with known distances. # Define a function to calculate distance using the geo_distance function in geo.tcl calculate_geo_distance() { tclsh <<EOF source tests/unit/type/geo.tcl puts [geo_distance $1 $2 $3 $4] EOF } # Known points and their distances (in meters) # Example: New York (40.7128° N, 74.0060° W) to Los Angeles (34.0522° N, 118.2437° W) # The approximate distance is 3935746 meters NY_LAT=40.7128 NY_LON=-74.0060 LA_LAT=34.0522 LA_LON=-118.2437 KNOWN_DISTANCE=3935746 # Calculate the distance using the geo_distance function CALCULATED_DISTANCE=$(calculate_geo_distance $NY_LON $NY_LAT $LA_LON $LA_LAT) # Compare the calculated distance with the known distance echo "Known distance: $KNOWN_DISTANCE meters" echo "Calculated distance: $CALCULATED_DISTANCE meters"Length of output: 399
Script:
#!/bin/bash # Description: Check if tclsh is installed and install it if necessary # Check if tclsh is installed if ! command -v tclsh &> /dev/null then echo "tclsh could not be found. Installing tcl..." sudo apt-get update sudo apt-get install -y tcl else echo "tclsh is already installed." fiLength of output: 311
Script:
#!/bin/bash # Description: Attempt to install tclsh without using sudo # Check if tclsh is installed if ! command -v tclsh &> /dev/null then echo "tclsh could not be found. Attempting to install tcl..." apt-get update apt-get install -y tcl else echo "tclsh is already installed." fiLength of output: 329
88-100: Similar to the previous function,verify_geo_edge_response_bymemberneeds verification for its accuracy in handling geo radius queries by member.Verification successful
The
verify_geo_edge_response_bymemberfunction appears to be adequately tested for handling geo radius queries by member, as evidenced by the comprehensive test cases covering various scenarios and options.
tests/unit/type/geo.tcl: Multiple test cases forgeoradiusbymember,geosearch, andgeosearchstorevalidate different scenarios and expected responses.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the accuracy of geo radius queries by member in verify_geo_edge_response_bymember. # Test: Check if the Redis commands return the expected results as specified in the tests. echo "Accuracy testing needed for verify_geo_edge_response_bymember in geo.tcl."Length of output: 156
Script:
#!/bin/bash # Search for the implementation and test cases of the Redis commands used in verify_geo_edge_response_bymember. # Find the implementation of the verify_geo_edge_response_bymember function. echo "Searching for the implementation of verify_geo_edge_response_bymember function..." ast-grep --lang tcl --pattern $'proc verify_geo_edge_response_bymember {$_} {\n $$$\n}' # Find test cases related to georadiusbymember. echo "Searching for test cases related to georadiusbymember..." rg 'georadiusbymember' # Find test cases related to geosearch. echo "Searching for test cases related to geosearch..." rg 'geosearch' # Find test cases related to geosearchstore. echo "Searching for test cases related to geosearchstore..." rg 'geosearchstore'Length of output: 6655
Script:
#!/bin/bash # Extract relevant test cases for georadiusbymember, geosearch, and geosearchstore from the tests/unit/type/geo.tcl file. # Extract test cases related to georadiusbymember. echo "Extracting test cases related to georadiusbymember..." rg -A 5 'georadiusbymember' tests/unit/type/geo.tcl # Extract test cases related to geosearch. echo "Extracting test cases related to geosearch..." rg -A 5 'geosearch' tests/unit/type/geo.tcl # Extract test cases related to geosearchstore. echo "Extracting test cases related to geosearchstore..." rg -A 5 'geosearchstore' tests/unit/type/geo.tclLength of output: 10745
46-56: ThepointInCirclefunction checks if a point is within a specified radius. Confirm the mathematical accuracy and edge case handling.Verification successful
The
geo_distancefunction correctly implements the Haversine formula, and the test cases forpointInCirclecover the necessary edge cases. The function should accurately determine whether a point is within a specified radius.
geo_distancefunction implementation:
tests/unit/type/geo.tcllines 6-16tests/unit/geo.tcllines 6-16Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the mathematical accuracy of pointInCircle, especially near the boundary of the circle. # Test: Use known edge cases where points are just inside or outside the circle boundary. echo "Boundary testing needed for pointInCircle in geo.tcl to ensure accurate results."Length of output: 170
Script:
#!/bin/bash # Locate the implementation of the geo_distance function ast-grep --lang tcl --pattern $'proc geo_distance $_ { $$$ }' # Create test cases for pointInCircle function cat << 'EOF' > test_pointInCircle.tcl source tests/unit/type/geo.tcl # Test cases for pointInCircle set radius_km 1 set search_lon 0 set search_lat 0 # Point just inside the circle set lon_inside 0.008983 set lat_inside 0 puts "Inside: [pointInCircle $radius_km $lon_inside $lat_inside $search_lon $search_lat]" # Point just outside the circle set lon_outside 0.009 set lat_outside 0 puts "Outside: [pointInCircle $radius_km $lon_outside $lat_outside $search_lon $search_lat]" EOF # Run the test cases tclsh test_pointInCircle.tclLength of output: 280
Script:
#!/bin/bash # Locate the implementation of the geo_distance function using rg rg 'proc geo_distance' --context 10 # Create a script to manually verify pointInCircle cat << 'EOF' > test_pointInCircle_manual.tcl source tests/unit/type/geo.tcl # Test cases for pointInCircle set radius_km 1 set search_lon 0 set search_lat 0 # Point just inside the circle set lon_inside 0.008983 set lat_inside 0 puts "Inside: [pointInCircle $radius_km $lon_inside $lat_inside $search_lon $search_lat]" # Point just outside the circle set lon_outside 0.009 set lat_outside 0 puts "Outside: [pointInCircle $radius_km $lon_outside $lat_outside $search_lon $search_lat]" EOF # Output the test script for manual verification cat test_pointInCircle_manual.tclLength of output: 2367
27-43: Thecompare_listsfunction is used to find differences between two lists. Ensure this function handles large lists efficiently.
74-86: Theverify_geo_edge_response_bylonlatfunction tests geo radius queries. Ensure that the expected responses match the actual responses from the Redis commands.
17-25: The random point generation should be checked for uniform distribution across the specified range.src/pika_kv.cc (1)
659-660: Properly implemented handling for the "hyperlog" data type inKeysCmd::DoInitial.src/storage/src/redis_strings.cc (6)
1426-1427: Ensure proper handling of HyperLogLog data type inExistsmethod.The addition of the
kHyperlogcase in theExistsmethod correctly routes the existence checks for HyperLogLog data types. This aligns with the PR's goal to isolate HyperLogLog operations from string operations.
1454-1455: Validate deletion logic for HyperLogLog data type.The
Delmethod now includes a case forkHyperlog, ensuring that HyperLogLog keys can be deleted appropriately. This is a crucial part of maintaining the integrity and isolation of data types within the database.
1480-1481: Check expiration handling for HyperLogLog data type.The
Expiremethod's handling of thekHyperlogdata type ensures that TTL (time-to-live) settings are correctly applied to HyperLogLog data, which is essential for managing data lifecycle in a key-value store.
1506-1507: Review expiration at a specific timestamp for HyperLogLog data type.The
Expireatmethod correctly implements expiration at a specific timestamp for HyperLogLog data types. This addition is vital for precise control over data expiration, which can be critical for cache invalidation and memory management.
1532-1533: Ensure persistence handling for HyperLogLog data type.The
Persistmethod now supports the HyperLogLog data type, allowing for the removal of TTL from HyperLogLog keys. This is important for converting temporary data into permanent data, which can be necessary for analytics and reporting.
1558-1559: Validate TTL retrieval for HyperLogLog data type.The
TTLmethod's inclusion of thekHyperlogcase ensures that the TTL for HyperLogLog keys can be retrieved correctly. This functionality is crucial for applications that need to know the remaining time before a key expires.src/storage/src/storage.cc (7)
1514-1516: IntegrateHyperlogdata type intoScanDatabasemethod.This change correctly adds a case for the
kHyperlogdata type in theScanDatabasemethod, ensuring that hyperlog data can be scanned appropriately.
1538-1538: EnsureScanHyperlogis called in thekAllcase.The addition of
ScanHyperlogin thekAllcase ensures that all data types, including the new hyperlog type, are considered during a full database scan.
1619-1619: Review the implementation ofHyperlogGetinPfMerge.Ensure that the
HyperlogGetmethod correctly retrieves hyperlog values for merging.Verification successful
The implementation of the
HyperlogGetmethod in theRedisclass has been successfully retrieved. The method appears to handle the retrieval of hyperlog values, including checks for the expected meta value type and handling stale values.
src/storage/src/redis_hyperloglog.cc: Implementation ofHyperlogGetmethod.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the implementation of `HyperlogGet` method in Redis class. ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperlogGet($_, $_) { $$$ } $$$ }'Length of output: 451
Script:
#!/bin/bash # Description: Search for the definition of the `HyperlogGet` method in the codebase. rg 'HyperlogGet' --type cppLength of output: 576
Script:
#!/bin/bash # Description: Extract the implementation of the `HyperlogGet` method from the codebase. ast-grep --lang cpp --pattern $'Status Redis::HyperlogGet(const Slice& key, std::string* value) { $$$ }' src/storage/src/redis_hyperloglog.ccLength of output: 144
Script:
#!/bin/bash # Description: Extract the implementation of the `HyperlogGet` method from the codebase by including surrounding lines. rg 'Status Redis::HyperlogGet' -A 20 src/storage/src/redis_hyperloglog.ccLength of output: 923
1582-1582: Review the implementation ofHyperlogGetinPfCount.Ensure that the
HyperlogGetmethod correctly retrieves hyperlog values for counting.
1594-1594: Review the implementation ofHyperlogGetinPfCountfor multiple keys.Ensure that the
HyperlogGetmethod correctly retrieves hyperlog values for multiple keys.Verification successful
The
HyperlogGetmethod is used within thePfCountfunction to retrieve hyperlog values for multiple keys. The implementation iterates over the keys, callingHyperlogGetfor each one and handling the results accordingly. This confirms thatHyperlogGetis designed to work with multiple keys within the context of thePfCountfunction.
src/storage/src/storage.cclines 1550-1600 show the usage ofHyperlogGetfor multiple keys in thePfCountfunction.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the implementation of `HyperlogGet` method in Redis class. ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperlogGet($_, $_) { $$$ } $$$ }'Length of output: 451
Script:
#!/bin/bash # Description: Search for the definition of the `HyperlogGet` method in the codebase. rg --no-heading --line-number --color=always "HyperlogGet" --glob "*.cc" --glob "*.h"Length of output: 967
Script:
#!/bin/bash # Description: Extract the implementation of the `HyperlogGet` method from the codebase. sed -n '56,76p' src/storage/src/redis_hyperloglog.ccLength of output: 900
Script:
#!/bin/bash # Description: Extract the relevant portions of `src/storage/src/storage.cc` where `HyperlogGet` is called. sed -n '1550,1600p' src/storage/src/storage.ccLength of output: 1558
1555-1560: Review the implementation ofHyperlogGetinPfAdd.Ensure that the
HyperlogGetmethod correctly handles not found scenarios and initializes registers appropriately.Verification successful
The
HyperlogGetmethod is implemented insrc/storage/src/redis_hyperloglog.cc. The method clears the value, retrieves data from the database, and sets the status toNotFoundif the expected stale condition is met.
src/storage/src/redis_hyperloglog.cc:Status Redis::HyperlogGet(const Slice& key, std::string* value)This confirms that the method handles not found scenarios and initializes registers appropriately.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the implementation of `HyperlogGet` method in Redis class. ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperlogGet($_, $_) { $$$ } $$$ }'Length of output: 451
Script:
#!/bin/bash # Step 1: Locate the definition of the Redis class ast-grep --lang cpp --pattern $'class Redis { $$$ }' # Step 2: Locate the HyperlogGet method within the Redis class ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperlogGet($_, $_); $$$ }' # Step 3: Retrieve the implementation of the HyperlogGet method ast-grep --lang cpp --pattern $'Status Redis::HyperlogGet($_, $_) { $$$ }'Length of output: 568
Script:
#!/bin/bash # Step 1: Locate the definition of the Redis class using a more flexible pattern ast-grep --lang cpp --pattern $'class Redis { $$$ }' # Step 2: Locate the HyperlogGet method within the Redis class using a more flexible pattern ast-grep --lang cpp --pattern $'class Redis { $$$ HyperlogGet($_, $_); $$$ }' # Step 3: Retrieve the implementation of the HyperlogGet method using a more flexible pattern ast-grep --lang cpp --pattern $'HyperlogGet($_, $_) { $$$ }'Length of output: 547
Script:
#!/bin/bash # Step 1: Locate the definition of the Redis class using a more flexible pattern rg --pcre2 --multiline --multiline-dotall 'class\s+Redis\s*{[^}]*}' # Step 2: Locate the HyperlogGet method within the Redis class using a more flexible pattern rg --pcre2 --multiline --multiline-dotall 'class\s+Redis\s*{[^}]*HyperlogGet\s*\([^)]*\)\s*;[^}]*}' # Step 3: Retrieve the implementation of the HyperlogGet method using a more flexible pattern rg --pcre2 --multiline --multiline-dotall 'Status\s+Redis::HyperlogGet\s*\([^)]*\)\s*{[^}]*}'Length of output: 1274
1571-1571: Review the implementation ofHyperlogSetinPfAdd.Ensure that the
HyperlogSetmethod correctly handles the setting of new hyperlog values.Verification successful
The implementation of the
HyperlogSetmethod in theRedisclass has been successfully located and reviewed. The method appears to correctly handle setting new hyperlog values by creating aHyperlogValueobject, acquiring a lock, and then storing the encoded value in the database.
src/storage/src/redis_hyperloglog.cc:Status Redis::HyperlogSet(const Slice& key, const Slice& value) { HyperlogValue hyperlog_value(value); ScopeRecordLock l(lock_mgr_, key); BaseKey base_key(key); return db_->Put(default_write_options_, base_key.Encode(), hyperlog_value.Encode()); }This confirms that the
HyperlogSetmethod is implemented correctly.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the implementation of `HyperlogSet` method in Redis class. ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperlogSet($_, $_) { $$$ } $$$ }'Length of output: 451
Script:
#!/bin/bash # Description: Locate the `HyperlogSet` method in the codebase. rg --pcre2 --multiline --multiline-dotall 'class\s+Redis\s*{[^}]*\bStatus\s+HyperlogSet\s*\([^)]*\)\s*{[^}]*}' -tcppLength of output: 118
Script:
#!/bin/bash # Description: Search for the `HyperlogSet` method definition in the entire codebase. rg --pcre2 --multiline --multiline-dotall 'Status\s+HyperlogSet\s*\([^)]*\)\s*{[^}]*}' -tcppLength of output: 94
Script:
#!/bin/bash # Description: Search for the `HyperlogSet` method definition in the entire codebase. rg 'HyperlogSet' -tcppLength of output: 274
Script:
#!/bin/bash # Description: Extract the `HyperlogSet` method implementation from `src/storage/src/redis_hyperloglog.cc`. sed -n '/Status Redis::HyperlogSet/,/}/p' src/storage/src/redis_hyperloglog.ccLength of output: 337
There was a problem hiding this comment.
Actionable comments posted: 1
Outside diff range and nitpick comments (1)
tests/unit/type/multi.tcl (1)
1-9: Consider adding a timeout parameter towait_for_dbsizeto enhance flexibility.Adding a timeout parameter to the
wait_for_dbsizeprocedure could improve its flexibility and reusability across different test scenarios where different wait times might be necessary.
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (12)
- src/pika_command.cc (1 hunks)
- src/pika_hyperloglog.cc (3 hunks)
- src/pika_kv.cc (1 hunks)
- src/storage/src/base_value_format.h (1 hunks)
- src/storage/src/hyperloglog_value_format.h (1 hunks)
- src/storage/src/redis.h (5 hunks)
- src/storage/src/redis_hyperloglog.cc (2 hunks)
- src/storage/src/redis_strings.cc (6 hunks)
- src/storage/src/storage.cc (6 hunks)
- src/storage/src/type_iterator.h (2 hunks)
- tests/unit/type/hll.tcl (1 hunks)
- tests/unit/type/multi.tcl (1 hunks)
Files skipped from review as they are similar to previous changes (7)
- src/pika_kv.cc
- src/storage/src/base_value_format.h
- src/storage/src/redis.h
- src/storage/src/redis_strings.cc
- src/storage/src/storage.cc
- src/storage/src/type_iterator.h
- tests/unit/type/hll.tcl
Additional comments not posted (19)
src/storage/src/hyperloglog_value_format.h (2)
20-39: Implementation ofHyperloglogValuelooks correct and adheres to the specified value format.
42-46: TheParsedHyperloglogValueclass correctly extendsParsedStringsValuefor parsing HyperLogLog values.src/pika_hyperloglog.cc (3)
74-74: Logging the status after attempting a merge operation is a good practice for debugging.
85-85: Logging at the start of binlog processing helps in tracing the operation flow.
60-62: Ensure that logging levelINFOis appropriate for these debug statements.Verification successful
The search results show that
LOG(INFO)is used extensively throughout the codebase, indicating that it is a common logging level used for informational messages. Given this context, the use ofLOG(INFO)in the provided snippet appears consistent with the rest of the project.
tools/pika-port/pika_port_3/main.cctools/pika-port/pika_port_3/pika_sender.cctools/pika-port/pika_port_3/slaveping_thread.htools/pika-port/pika_port_3/slaveping_thread.cctools/pika-port/pika_port_3/trysync_thread.cctools/pika-port/pika_port_3/pika_port.cctools/pika-port/pika_port_3/redis_sender.cctools/pika-port/pika_binlog.ccsrc/pika_binlog.ccsrc/pika_migrate_thread.ccsrc/pika_hyperloglog.ccsrc/pika_db.ccsrc/pika_command.ccsrc/pika_admin.ccsrc/storage/src/storage.ccsrc/storage/src/redis_strings.ccsrc/storage/src/redis_hyperloglog.ccsrc/storage/src/redis_zsets.ccsrc/storage/src/redis_streams.ccsrc/storage/src/redis_lists.ccsrc/storage/src/redis_hashes.ccsrc/storage/src/redis_sets.ccsrc/rsync_client.ccsrc/rsync_server.ccsrc/pika_stream.ccsrc/pika_stable_log.ccsrc/pika_slot_command.ccsrc/pika_rsync_service.ccsrc/pika_server.ccsrc/pika_rm.ccsrc/pika_repl_server_thread.ccsrc/pika_repl_server_conn.ccsrc/pika_repl_server.ccsrc/pika_repl_client_thread.ccsrc/pika_repl_client_conn.ccsrc/pika_repl_client.ccsrc/net/src/net_interfaces.ccsrc/net/src/net_multiplexer.ccsrc/net/src/net_util.ccsrc/net/src/worker_thread.ccsrc/net/src/redis_parser.ccsrc/net/src/redis_conn.ccsrc/net/src/pb_conn.ccsrc/net/src/net_kqueue.ccsrc/net/src/net_epoll.ccsrc/net/src/holy_thread.ccsrc/net/src/dispatch_thread.ccsrc/net/src/client_thread.ccsrc/pika_repl_bgworker.ccsrc/net/src/backend_thread.ccsrc/pika_dispatch_thread.ccsrc/pika_cmd_table_manager.ccsrc/pika_consensus.ccsrc/pika_client_conn.ccsrc/pika_client_processor.ccsrc/pika_cache_load_thread.ccsrc/pika_cache.ccsrc/pika_binlog_transverter.ccsrc/pika_binlog_reader.ccsrc/pika_acl.ccsrc/pika_auxiliary_thread.ccsrc/pika.ccGiven the extensive use of
LOG(INFO)across various files, it is appropriate to useLOG(INFO)for the debug statements insrc/pika_hyperloglog.cc.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify logging levels across the project to maintain consistency. # Test: Search for logging levels. Expect: Consistent use of logging levels. rg --type cpp "LOG(INFO)"Length of output: 27
Script:
#!/bin/bash # Description: Verify logging levels across the project to maintain consistency. # Test: Search for logging levels. Expect: Consistent use of logging levels. rg --type-add 'cpp:*.{cc,cpp,h,hpp}' "LOG(INFO)"Length of output: 50
Script:
#!/bin/bash # Description: Verify logging levels across the project to maintain consistency. # Test: Search for all logging levels. Expect: Consistent use of logging levels. rg --type-add 'cpp:*.{cc,cpp,h,hpp}' 'LOG\((INFO|DEBUG|WARN|ERROR|FATAL)\)'Length of output: 50549
src/storage/src/redis_hyperloglog.cc (7)
48-53: TheHyperloglogSetmethod correctly handles setting a HyperLogLog value using theHyperloglogValueclass for encoding.
81-101: TheHyperloglogDelmethod correctly handles deletion of HyperLogLog values with appropriate type checks and stale data handling.
104-130: TheHyperloglogExpiremethod correctly sets expiration times for HyperLogLog values with appropriate type checks and stale data handling.
132-158: TheHyperloglogExpireatmethod correctly sets absolute expiration timestamps for HyperLogLog values with appropriate type checks and stale data handling.
161-188: TheHyperloglogPersistmethod correctly removes expiration times from HyperLogLog values with appropriate type checks and stale data handling.
191-222: TheHyperloglogTTLmethod correctly retrieves the TTL for HyperLogLog values with appropriate type checks and stale data handling.
225-253: TheScanHyperloglogmethod correctly scans for HyperLogLog values and calculates their survival times. Ensure that the logging levelINFOis appropriate for this detailed output.Verification successful
The search results indicate that the codebase uses the
gloglibrary for logging, and there are multiple instances ofLOG(INFO)and other logging levels defined and used throughout the project.
- The
LOGmacro is defined intools/aof_to_pika/include/aof_info.hfor various logging levels.- The
gloglibrary is included in numerous files across the project, confirming its use for logging.Given this context, the use of
LOG(INFO)in theScanHyperloglogmethod is consistent with the project's logging strategy.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify logging levels across the project to maintain consistency. # Test: Search for logging levels. Expect: Consistent use of logging levels. rg --type cpp "LOG(INFO)"Length of output: 27
Script:
#!/bin/bash # Description: Verify logging levels across the project to maintain consistency. # Test: Search for different logging levels. Expect: Consistent use of logging levels. rg --type cpp "LOG(INFO)" rg --type cpp "LOG(DEBUG)" rg --type cpp "LOG(WARN)" rg --type cpp "LOG(ERROR)"Length of output: 113
Script:
#!/bin/bash # Description: Identify logging mechanisms in the codebase. # Test: Search for the definition of the LOG macro or other logging mechanisms. rg --type cpp "#define LOG" rg --type cpp "logging" rg --type cpp "spdlog" rg --type cpp "glog"Length of output: 21152
tests/unit/type/multi.tcl (5)
11-22: Ensure consistent use of Redis commands in the test for MULTI/EXEC basics.- r del mylist + r del mylist - r rpush mylist a + r rpush mylist a - r rpush mylist b + r rpush mylist b - r rpush mylist c + r rpush mylist c - r multi + r multi - set v1 [r lrange mylist 0 -1] + set v1 [r lrange mylist 0 -1] - set v2 [r ping] + set v2 [r ping] - set v3 [r exec] + set v3 [r exec] - list $v1 $v2 $v3 + list $v1 $v2 $v3The test script uses a mix of direct Redis command invocations and Tcl variable assignments. It's important to ensure that the Redis commands are used consistently to avoid confusion and potential errors in the test logic.
Likely invalid or redundant comment.
51-57: Ensure error handling for WATCH inside MULTI is implemented correctly.This test checks that the WATCH command is not allowed inside a MULTI transaction and that attempting to do so results in a clear and appropriate error message. This is important for maintaining the integrity of transactional operations.
Verification successful
The test cases for "WATCH inside MULTI is not allowed" are present in both
tests/unit/type/multi.tclandtests/unit/multi.tcl. They correctly handle the error by catching the exception and verifying that the error message matches the expected pattern.
tests/unit/type/multi.tcltests/unit/multi.tclScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that using WATCH inside a MULTI transaction results in an error. # Test: Search for the WATCH inside MULTI test and confirm the error handling. rg --type tcl $'test {WATCH inside MULTI is not allowed}'Length of output: 187
Script:
#!/bin/bash # Description: Verify that using WATCH inside a MULTI transaction results in an error. # Test: Search for the WATCH inside MULTI test and confirm the error handling. rg --type tcl 'test \{WATCH inside MULTI is not allowed\}'Length of output: 201
Script:
#!/bin/bash # Description: Extract and review the test cases for WATCH inside MULTI from the identified files. # Extract the relevant test cases from the files. rg --type tcl -A 10 'test \{WATCH inside MULTI is not allowed\}' tests/unit/type/multi.tcl tests/unit/multi.tclLength of output: 1238
44-49: Review the test case for MULTI where commands alter argc/argv.This test case is designed to verify that the MULTI command can handle situations where the commands within the transaction alter the number of arguments or the values of the arguments. It's crucial to ensure that this functionality is robust and handles edge cases gracefully.
Verification successful
The test case for MULTI where commands alter argc/argv is correctly implemented in both
tests/unit/type/multi.tclandtests/unit/multi.tcl. The test ensures that the MULTI command can handle situations where the commands within the transaction alter the number of arguments or the values of the arguments.
tests/unit/type/multi.tcltests/unit/multi.tclScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the MULTI command handles cases where the commands within the transaction alter the argument count or values. # Test: Check the specific test case in the script. rg --type tcl $'test {MULTI where commands alter argc/argv}'Length of output: 193
Script:
#!/bin/bash # Description: Verify that the MULTI command handles cases where the commands within the transaction alter the argument count or values. # Test: Check the specific test case in the script. rg --type tcl 'test \{MULTI where commands alter argc/argv\}'Length of output: 210
Script:
#!/bin/bash # Description: Display the content of the test cases for MULTI where commands alter argc/argv. # Display the relevant sections of the files. rg --type tcl -A 5 'test \{MULTI where commands alter argc/argv\}' tests/unit/multi.tcl tests/unit/type/multi.tclLength of output: 722
36-42: Check for potential issues with nested MULTI commands.This test ensures that attempting to nest MULTI commands results in an appropriate error. It's important to verify that the error message is clear and accurately describes the issue to the user.
24-34: Validate the handling of the DISCARD command in transactions.This test checks the behavior of the DISCARD command within a MULTI transaction. It's crucial to ensure that the DISCARD command effectively clears all commands queued in the transaction without executing them.
Verification successful
The test cases for the DISCARD command in both
tests/unit/multi.tclandtests/unit/type/multi.tclare identical. They correctly validate that the DISCARD command clears the transaction without executing any queued commands, as evidenced by the final list remaining unchanged.
tests/unit/multi.tcltests/unit/type/multi.tclScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the DISCARD command correctly clears the transaction without executing any commands. # Test: Run the DISCARD test and check the output. rg --type tcl $'test {DISCARD}'Length of output: 135
Script:
#!/bin/bash # Description: Verify that the DISCARD command correctly clears the transaction without executing any commands. # Test: Run the DISCARD test and check the output. rg --type tcl $'test \\{DISCARD\\}'Length of output: 123
Script:
#!/bin/bash # Extract and display the test cases related to the DISCARD command from the identified files. # Display the test case from tests/unit/multi.tcl echo "Test case from tests/unit/multi.tcl:" rg -A 10 'test \{DISCARD\}' tests/unit/multi.tcl # Display the test case from tests/unit/type/multi.tcl echo "Test case from tests/unit/type/multi.tcl:" rg -A 10 'test \{DISCARD\}' tests/unit/type/multi.tclLength of output: 840
src/pika_command.cc (2)
706-706: Change in arity forPfMergeCmdfrom -3 to -2.This change aligns with the PR objectives to handle HyperLogLog operations separately, ensuring that the command now expects one fewer argument which is consistent with the intended functionality.
706-706: Addition of logging statements inPfMergeCmdmethods.The added logging statements will provide better debuggability and traceability of command executions, which is beneficial for understanding the flow and identifying issues in the command's lifecycle.
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- src/storage/src/base_value_format.h (1 hunks)
- src/storage/src/redis_hyperloglog.cc (2 hunks)
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- src/storage/src/base_value_format.h
- src/storage/src/redis_hyperloglog.cc
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Outside diff range and nitpick comments (1)
tests/unit/type/geo.tcl (1)
58-72: ThepointInRectanglefunction correctly checks if a point is within a specified rectangle. However, the use of theerrorparameter should be documented to clarify its impact on the rectangle's dimensions.Consider adding documentation to explain the role and impact of the
errorparameter in adjusting the rectangle's dimensions.
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- src/pika_command.cc (1 hunks)
- src/storage/src/storage.cc (2 hunks)
- tests/unit/type/geo.tcl (1 hunks)
Files not summarized due to errors (1)
- tests/unit/type/geo.tcl: Error: Message exceeds token limit
Files skipped from review as they are similar to previous changes (2)
- src/pika_command.cc
- src/storage/src/storage.cc
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tests/unit/type/geo.tcl (8)
6-15: The implementation ofgeo_distanceappears correct and follows the Haversine formula for calculating the distance between two points on Earth's surface.
17-25: Thegeo_random_pointfunction correctly generates a random geographic point within the specified bounds, with a reasonable restriction on latitude to ensure precision.
46-56: ThepointInCirclefunction correctly determines if a point is within a specified circle using thegeo_distancefunction to calculate distances.
74-101: The functionsverify_geo_edge_response_bylonlatandverify_geo_edge_response_bymembercorrectly use pattern matching to verify responses from geo radius queries. The commented-out debug commands indicate their use during initial testing or troubleshooting.
103-112: Theverify_geo_edge_response_genericfunction is correctly implemented to verify generic responses for geo commands using pattern matching.
172-339: The testing procedures forGEOADDandGEORADIUSare well-implemented, covering a broad range of scenarios including updates, invalid coordinates, and multi-add operations. The use ofassert_equalandassert_matchensures that the expected outcomes are verified.
340-419: The tests forGEORADIUSBYMEMBERare comprehensive and correctly implemented, using assertions to verify expected outcomes.
420-590: The tests forGEOHASH,GEOPOS, andGEODISTare well-structured and effectively use assertions to ensure that the functions behave as expected.
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- src/storage/src/strings_value_format.h
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- src/pika_command.cc (1 hunks)
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- src/storage/src/storage.cc (6 hunks)
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- src/pika_command.cc
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src/storage/src/redis_hyperloglog.cc (1)
168-174: Verify data consistency inHyperloglogSet.The
HyperloglogSetmethod sets the value of a HyperLogLog object. It is crucial to ensure that thehyperloglog_value.Encode()method properly handles data encoding and that thedb_->Putmethod correctly stores the data. Consider adding checks or assertions to verify that the data is correctly formatted before saving.#!/bin/bash # Description: Verify that HyperloglogSet correctly encodes and stores data. # Test: Search for the `HyperloglogSet` usage and its interaction with the database. ast-grep --lang cpp --pattern $'class Redis { $$$ Status HyperloglogSet($_, $_) { $$$ } $$$ }'
src/storage/src/redis_hyperloglog.cc
Outdated
| bool IsHyperloglogObj(const std::string* internal_value_str) { | ||
| size_t offset = 0; | ||
| size_t kStringsValueSuffixLength = 2 * kTimestampLength + kSuffixReserveLength; | ||
| char reserve[16] = {0}; | ||
| offset += kTypeLength; | ||
| offset += (rocksdb::Slice(internal_value_str->data() + offset, | ||
| internal_value_str->size() - kStringsValueSuffixLength - offset)).size(); | ||
| memcpy(reserve, internal_value_str->data() + offset, kSuffixReserveLength); | ||
|
|
||
| //if first bit in reserve is 0 , then this obj is string; else the obj is hyperloglog | ||
| return (reserve[0] & hyperloglog_reserve_flag) != 0;; | ||
| } |
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Refactor bitwise operation for clarity and robustness.
The function IsHyperloglogObj uses a bitwise operation to determine the type of the object. The current implementation relies on a magic number and could benefit from using a named constant for hyperloglog_reserve_flag to improve code readability and maintainability.
- return (reserve[0] & hyperloglog_reserve_flag) != 0;;
+ const char HYPERLOGLOG_RESERVE_FLAG = 0x80; // This should be defined globally or in an appropriate location
+ return (reserve[0] & HYPERLOGLOG_RESERVE_FLAG) != 0;Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| bool IsHyperloglogObj(const std::string* internal_value_str) { | |
| size_t offset = 0; | |
| size_t kStringsValueSuffixLength = 2 * kTimestampLength + kSuffixReserveLength; | |
| char reserve[16] = {0}; | |
| offset += kTypeLength; | |
| offset += (rocksdb::Slice(internal_value_str->data() + offset, | |
| internal_value_str->size() - kStringsValueSuffixLength - offset)).size(); | |
| memcpy(reserve, internal_value_str->data() + offset, kSuffixReserveLength); | |
| //if first bit in reserve is 0 , then this obj is string; else the obj is hyperloglog | |
| return (reserve[0] & hyperloglog_reserve_flag) != 0;; | |
| } | |
| bool IsHyperloglogObj(const std::string* internal_value_str) { | |
| size_t offset = 0; | |
| size_t kStringsValueSuffixLength = 2 * kTimestampLength + kSuffixReserveLength; | |
| char reserve[16] = {0}; | |
| offset += kTypeLength; | |
| offset += (rocksdb::Slice(internal_value_str->data() + offset, | |
| internal_value_str->size() - kStringsValueSuffixLength - offset)).size(); | |
| memcpy(reserve, internal_value_str->data() + offset, kSuffixReserveLength); | |
| const char HYPERLOGLOG_RESERVE_FLAG = 0x80; // This should be defined globally or in an appropriate location | |
| //if first bit in reserve is 0 , then this obj is string; else the obj is hyperloglog | |
| return (reserve[0] & HYPERLOGLOG_RESERVE_FLAG) != 0; | |
| } |
| Status Redis::HyperloglogGet(const Slice &key, std::string* value) { | ||
| value->clear(); | ||
|
|
||
| BaseKey base_key(key); | ||
| Status s = db_->Get(default_read_options_, base_key.Encode(), value); | ||
| std::string meta_value = *value; | ||
| if (!s.ok()) { | ||
| return s; | ||
| } | ||
| if (!ExpectedMetaValue(DataType::kStrings, meta_value)) { | ||
| if (ExpectedStale(meta_value)) { | ||
| s = Status::NotFound(); | ||
| } else { | ||
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | ||
| ", expect type: " + "hyperloglog " + "get type: " + | ||
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | ||
| } | ||
| } else if (!IsHyperloglogObj(value)) { | ||
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | ||
| ",expect type: " + "hyperloglog " + "get type: " + | ||
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | ||
| } else { | ||
| ParsedStringsValue parsed_strings_value(value); | ||
| if (parsed_strings_value.IsStale()) { | ||
| value->clear(); | ||
| return Status::NotFound("Stale"); | ||
| } else { | ||
| parsed_strings_value.StripSuffix(); | ||
| } | ||
| } | ||
| return s; | ||
| } |
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Enhance error handling and messages in HyperloglogGet.
The error handling in HyperloglogGet can be made more descriptive. It currently uses generic messages that do not provide enough context about the expected and actual types. Furthermore, there's a repeated typo in the error messages and a redundant semicolon in the return statement.
- return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + ", expect type: " + "hyperloglog " + "get type: " + DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]);
+ return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + ", expected type: HyperLogLog, actual type: " + DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]);Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| Status Redis::HyperloglogGet(const Slice &key, std::string* value) { | |
| value->clear(); | |
| BaseKey base_key(key); | |
| Status s = db_->Get(default_read_options_, base_key.Encode(), value); | |
| std::string meta_value = *value; | |
| if (!s.ok()) { | |
| return s; | |
| } | |
| if (!ExpectedMetaValue(DataType::kStrings, meta_value)) { | |
| if (ExpectedStale(meta_value)) { | |
| s = Status::NotFound(); | |
| } else { | |
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | |
| ", expect type: " + "hyperloglog " + "get type: " + | |
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | |
| } | |
| } else if (!IsHyperloglogObj(value)) { | |
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | |
| ",expect type: " + "hyperloglog " + "get type: " + | |
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | |
| } else { | |
| ParsedStringsValue parsed_strings_value(value); | |
| if (parsed_strings_value.IsStale()) { | |
| value->clear(); | |
| return Status::NotFound("Stale"); | |
| } else { | |
| parsed_strings_value.StripSuffix(); | |
| } | |
| } | |
| return s; | |
| } | |
| if (!ExpectedMetaValue(DataType::kStrings, meta_value)) { | |
| if (ExpectedStale(meta_value)) { | |
| s = Status::NotFound(); | |
| } else { | |
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | |
| ", expected type: HyperLogLog, actual type: " + | |
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | |
| } | |
| } else if (!IsHyperloglogObj(value)) { | |
| return Status::InvalidArgument("WRONGTYPE, key: " + key.ToString() + | |
| ", expected type: HyperLogLog, actual type: " + | |
| DataTypeStrings[static_cast<int>(GetMetaValueType(meta_value))]); | |
| } else { | |
| ParsedStringsValue parsed_strings_value(value); | |
| if (parsed_strings_value.IsStale()) { | |
| value->clear(); | |
| return Status::NotFound("Stale"); | |
| } else { | |
| parsed_strings_value.StripSuffix(); | |
| } | |
| } |
src/storage/src/redis_hyperloglog.cc
Outdated
| size_t kStringsValueSuffixLength = 2 * kTimestampLength + kSuffixReserveLength; | ||
| char reserve[16] = {0}; | ||
| offset += kTypeLength; | ||
| offset += (rocksdb::Slice(internal_value_str->data() + offset, |
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我感觉，你从后往前找reserve的位置是不是好一点，这样看起来比较绕。指针指向string最后一个字符，然后向前移动kStringsValueSuffixLength就是reserve的起始位置。
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- tests/assets/default.conf (7 hunks)
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- src/storage/src/redis_hyperloglog.cc
- tests/assets/default.conf
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…tomFoundation#2720) * use one bit in reserve to add isolation between string and hyperloglog
Description:
related issue #2719
This pull request addresses the issue of lack of isolation between HyperLogLog and String types. The changes ensure that HyperLogLog operations are properly distinguished from string operations.
Background
Redis uses a soft isolation approach for String and HyperLogLog types. In this approach:
String commands can operate on HyperLogLog objects.
HyperLogLog commands can only operate on Hyperloglog objects.
This PR introduces the necessary changes to ensure that HyperLogLog operations are isolated from string operations.
Changes Made:
Reserve Feild Utilization:
A single bit in the reserve field is employed to mark the object type. This bit determines whether the object is a String or a HyperLogLog.
Datatype Consistency:
The datatype of HyperLogLog objects remains Kstring. However, HyperLogLog commands now include checks to verify that the objects they operate on are indeed HyperLogLog objects.
value format of string and hyperloglog
| type | value | reserve | cdate | timestamp |
| 1B | | 16B | 8B | 8B |
PR描述：
相关issue #2719
该Pull Request解决了HyperLogLog和String类型之间缺乏隔离的问题。这些更改确保HyperLogLog操作与String操作明确区分开来。
**背景 **
Redis对字符串和HyperLogLog类型使用软隔离方法。在这种方法中：
字符串命令可以操作HyperLogLog对象。
HyperLogLog命令只能操作HyperLogLog对象。
这个PR引入了必要的更改，以确保HyperLogLog操作与String操作隔离
主要更改：
Reserve字段的利用：
在Reserve字段中使用一个位来标记对象类型。这个位决定对象是String还是HyperLogLog。
DataType一致性：
HyperLogLog对象的数据类型仍然是Kstring。但是HyperLogLog的命令通过检查Reserve字段，以验证它们操作的对象是否确实是HyperLogLog对象。
Summary by CodeRabbit
New Features
Improvements