Reset dag chain #4227
Reset dag chain #4227
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WalkthroughThe changes introduce two new public methods in the Changes
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🧹 Outside diff range and nitpick comments (2)
flexidag/src/blockdag.rs (1)
562-564: LGTM, but consider adding documentation and evaluating encapsulation.The new
reachability_servicemethod provides external access to theMTReachabilityService, which could be useful for optimizations or additional functionality. However, consider the following suggestions:
- Add documentation comments to explain the purpose and potential use cases of this method.
- Evaluate if exposing this internal component aligns with the desired level of encapsulation for the
BlockDAGstruct.Consider adding documentation comments to the method:
+ /// Returns the MTReachabilityService associated with the PruningPointManager. + /// This method provides access to the reachability service for external use. + /// + /// # Returns + /// An instance of MTReachabilityService<DbReachabilityStore> pub fn reachability_service(&self) -> MTReachabilityService<DbReachabilityStore> { self.pruning_point_manager().reachability_service() }sync/src/block_connector/write_block_chain.rs (1)
381-381: Typo in variable namelastestThe variable
lastestappears to be a typo. Consider renaming it tolatestfor better readability and to avoid confusion.Suggested change:
- let lastest = self.main.status().head.id(); + let latest = self.main.status().head.id();
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📒 Files selected for processing (3)
- flexidag/src/blockdag.rs (1 hunks)
- flexidag/src/ghostdag/protocol.rs (1 hunks)
- sync/src/block_connector/write_block_chain.rs (1 hunks)
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🔇 Additional comments (2)
flexidag/src/ghostdag/protocol.rs (1)
25-25: Visibility change forreachability_servicefieldThe visibility of the
reachability_servicefield has been changed frompub(super)topub. This change allows the field to be accessed from outside the module, which could potentially affect the encapsulation of theGhostdagManagerstruct.Please confirm if this change is intentional and consider the following:
- Are there any security implications of exposing this field publicly?
- Does this change align with the module's design principles and intended usage?
- Are there any other parts of the codebase that might need to be updated to maintain consistency with this change?
To verify the impact and usage of this field, you can run the following script:
This will help identify any existing or potential usage of the field outside its current module.
✅ Verification successful
Visibility change for
reachability_servicefield verifiedThe change from
pub(super)topubfor thereachability_servicefield is intentional and necessary for its usage across multiple modules in the codebase. This adjustment maintains the intended design and does not introduce any immediate security concerns.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Search for usage of reachability_service field outside the current module rg --type rust -g '!protocol.rs' 'reachability_service'Length of output: 1993
Script:
#!/bin/bash # List all functions or methods where reachability_service is accessed rg --type rust 'reachability_service\.' # Extract the contexts around reachability_service usages for deeper analysis rg --type rust -C 3 'reachability_service'Length of output: 11653
sync/src/block_connector/write_block_chain.rs (1)
383-383: Verify the parameter order inforward_chain_iteratorEnsure that the parameters
startandlastest(after correcting tolatest) are in the correct order when callingforward_chain_iterator. Incorrect parameter ordering may lead to unexpected behavior in block iteration and deletion.You can confirm the parameter order by reviewing the method signature of
forward_chain_iterator. Run the following script to find its definition:
use dag-master fork in kube config file
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🧹 Outside diff range and nitpick comments (2)
kube/manifest/starcoin-halley.yaml (2)
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28-45: Consider refactoring the command for improved maintainability.While the command logic remains unchanged, its complex structure could make future maintenance and debugging challenging.
Consider the following improvements:
- Split the command into separate scripts or ConfigMap entries for better modularity.
- Use Kubernetes init containers for cleanup operations instead of including them in the main container command.
- Implement proper logging for each step to aid in debugging.
- Consider using Kubernetes secrets for sensitive data like node keys instead of environment variables.
Example refactoring (partial):
initContainers: - name: cleanup image: busybox command: ['sh', '-c', 'rm -rf /sc-data/halley/starcoin.ipc /sc-data/halley/starcoindb/db/starcoindb/LOCK /sc-data/halley/genesis_config.json'] volumeMounts: - name: starcoin-volume mountPath: /sc-data containers: - name: starcoin image: starcoin/starcoin:dag-master command: ["/bin/sh", "-c"] args: - | set -e echo "Starting Starcoin node..." /starcoin/starcoin -n halley -d /sc-data \ --p2prpc-default-global-api-quota 9000/s \ --p2prpc-custom-user-api-quota get_header_by_hash=9000/s \ # ... (other flags) ... $node_key_flag env: - name: NODE_KEY valueFrom: secretKeyRef: name: node-keys key: node-key-$(POD_NAME)This structure separates concerns, improves readability, and makes it easier to manage and debug the deployment.
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1-85: Summary of review findings and recommendationsThis review has identified several important changes and areas for improvement in the Kubernetes StatefulSet configuration:
- The addition of a node selector may impact deployment flexibility and scalability.
- The use of a
mastertag for the container image could lead to inconsistent deployments.- The complex command structure, while functional, could benefit from refactoring for improved maintainability and debugging.
To ensure a robust and maintainable deployment, please address the following:
- Verify the availability of nodes with the
starcoin/node-pool: seed-poollabel and the rationale behind this change.- Consider using a specific version tag instead of
masterfor the container image, and provide details on the changes and testing process for the new version.- Refactor the command structure as suggested to improve modularity, security, and ease of maintenance.
These changes will contribute to a more stable, traceable, and maintainable deployment of the Starcoin application.
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📒 Files selected for processing (2)
- kube/manifest/starcoin-halley.yaml (1 hunks)
- sync/src/block_connector/write_block_chain.rs (2 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- sync/src/block_connector/write_block_chain.rs
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🔇 Additional comments (1)
kube/manifest/starcoin-halley.yaml (1)
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19-20: Verify node selector change and its impact on deployment.A new node selector
starcoin/node-pool: seed-poolhas been added. This will restrict the pods to run only on nodes with this specific label.Please confirm:
- Are there sufficient nodes labeled with
starcoin/node-pool: seed-poolto support the desired number of replicas?- What's the rationale behind this change? Is it to ensure the StatefulSet runs on specific, possibly more powerful, nodes?
- How might this affect the availability and scaling of the application?
To verify the available nodes, you can run:
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🧹 Outside diff range and nitpick comments (2)
sync/src/block_connector/write_block_chain.rs (2)
411-436: Approve DAG state saving with suggestion for error handlingThe DAG state saving logic correctly handles both the genesis case and non-genesis case. Setting the new head block as the only tip is appropriate for a reset operation.
Consider adding explicit error handling for the
save_dag_statecalls. For example:-self.main.dag().save_dag_state( +self.main.dag().save_dag_state( new_head_block.header().pruning_point(), DagState { tips: vec![new_head_block.header().id()], }, -)?; +).map_err(|e| format_err!("Failed to save DAG state: {}", e))?;This will provide more informative error messages if the DAG state saving fails.
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439-452: Approve reset finalization with suggestion for block count accuracyThe logic for creating a new branch and updating the main chain is correct and consistent with the rest of the codebase.
Consider calculating the actual enacted and retracted block counts instead of using hardcoded values. This will ensure accuracy, especially in complex DAG structures. For example:
-let (enacted_count, enacted_blocks, retracted_count, retracted_blocks) = - (1, vec![executed_block.block.clone()], 0, vec![]); +let enacted_blocks = self.find_blocks_until(executed_block.id(), block_id, usize::MAX)?; +let enacted_count = enacted_blocks.len() as u64; +let retracted_blocks = self.find_blocks_until(self.main.current_header().id(), block_id, usize::MAX)?; +let retracted_count = retracted_blocks.len() as u64;This change will provide more accurate information about the number of blocks affected by the reset operation.
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- sync/src/block_connector/write_block_chain.rs (2 hunks)
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sync/src/block_connector/write_block_chain.rs (3)
381-387: Improved block traversal using reachability serviceThe use of the reachability service's forward chain iterator is a significant improvement. It allows for more precise block traversal and deletion, which is crucial in a DAG-based blockchain architecture.
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381-452: Significant improvement in DAG reset functionalityThe changes to the
resetmethod represent a substantial improvement in handling DAG-based blockchain resets. The use of the reachability service for block traversal, precise block deletion logic, and proper DAG state management all contribute to a more robust and accurate reset process.Key improvements:
- More precise block traversal using the reachability service.
- Careful handling of parent block deletion to maintain DAG integrity.
- Proper DAG state saving for both genesis and non-genesis cases.
- Consistent use of existing methods like
do_new_headfor chain updates.While the overall implementation is solid, consider the suggested improvements for error handling and block count accuracy to further enhance the robustness of this critical operation.
389-409: Verify parent block deletion logicThe child block deletion logic is correct and straightforward. However, the parent block deletion process is more complex and may require additional verification.
Please run the following script to verify the parent block deletion logic:
This script will help ensure that no blocks are left with deleted parents, which could lead to orphaned blocks in the DAG.
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🧹 Outside diff range and nitpick comments (3)
sync/src/block_connector/write_block_chain.rs (1)
411-436: DAG state update logic looks good, but error handling can be improvedThe new implementation for updating the DAG state after resetting the chain is well-structured and handles both the genesis case and normal cases correctly. However, there's room for improvement in error handling:
The
save_dag_state_directlycalls (lines 417-428 and 430-435) don't have any error handling. Consider wrapping these calls in aResultand propagating any errors up the call stack.To improve robustness, you might want to consider making these state updates transactional. If any of the
save_dag_state_directlycalls fail, you should be able to roll back to the previous state.Here's a suggested improvement for error handling:
- self.main.dag().save_dag_state_directly( - new_head_block.header().pruning_point(), - DagState { - tips: vec![new_head_block.header().id()], - }, - )?; + self.main.dag().save_dag_state_directly( + new_head_block.header().pruning_point(), + DagState { + tips: vec![new_head_block.header().id()], + }, + ).map_err(|e| format_err!("Failed to save DAG state: {}", e))?;Apply similar changes to other
save_dag_state_directlycalls.flexidag/src/blockdag.rs (2)
452-455: LGTM. Consider adding a clarifying comment.The new
save_dag_state_directlymethod provides a straightforward way to save the DAG state. However, it bypasses the merging logic present in the existingsave_dag_statemethod.Consider adding a comment to explain when to use this method versus
save_dag_state, and any potential implications of bypassing the merging logic.
567-569: LGTM. Consider adding usage guidelines.The new
reachability_servicemethod provides direct access to theMTReachabilityService. This can be useful for external components that need to interact with the reachability service.Consider adding a comment to explain:
- The purpose of exposing this service.
- Guidelines for its usage to prevent misuse.
- Any potential implications for future refactoring or encapsulation.
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📒 Files selected for processing (2)
- flexidag/src/blockdag.rs (2 hunks)
- sync/src/block_connector/write_block_chain.rs (2 hunks)
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sync/src/block_connector/write_block_chain.rs (3)
15-15: LGTM: New import for DAG state managementThe addition of
DagStateimport is consistent with the changes in theresetmethod, which now involves DAG state management.
381-437: Overall assessment: Significant improvements with minor suggestionsThe changes to the
resetmethod represent a substantial improvement in block management and DAG state handling. The new implementation offers more precise control over block deletion and ensures proper updating of the DAG state after reset operations.Key improvements:
- Use of reachability service for accurate block deletion.
- Proper handling of parent blocks during deletion.
- Correct updating of DAG state, including special handling for the genesis case.
Suggestions for further improvement:
- Add checks to prevent deletion of parent blocks that might be referenced by other blocks in the DAG.
- Improve error handling for
save_dag_state_directlycalls.- Consider making state updates transactional to ensure atomicity.
These changes significantly enhance the robustness and correctness of the reset operation. With the suggested minor improvements, this implementation will provide a solid foundation for managing complex blockchain states.
381-409: Improved block deletion mechanism with a potential concernThe new implementation using the reachability service provides a more precise way of deleting blocks. It ensures consistency by deleting both child and parent blocks that are not part of the new chain.
However, there's a potential issue to consider:
- When deleting parent blocks (lines 398-407), we should verify that these blocks are not referenced by other blocks in the DAG. Deleting them without this check might lead to orphaned blocks or inconsistencies in the DAG structure.
Consider adding a check to ensure that parent blocks are not referenced by other blocks before deletion.
To verify if parent blocks might be referenced by other blocks, we can use the following script:
Benchmark for 1eff680Click to view benchmark
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🧹 Outside diff range and nitpick comments (1)
sync/src/parallel/executor.rs (1)
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93-113: Potential busy-wait when waiting for parent blocksIn the loop where
waiting_for_parentsis called, if the method returnsOk(false), the code yields withtokio::task::yield_now().awaitand immediately retries. This can lead to a busy-wait loop that consumes CPU resources if the parent blocks are not available immediately. Consider adding a delay or an exponential backoff strategy to reduce CPU usage.You could modify the code as follows:
- Ok(false) => tokio::task::yield_now().await, + Ok(false) => { + tokio::time::sleep(Duration::from_millis(100)).await; + },Remember to import the
Durationtype:use tokio::time::Duration;
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📒 Files selected for processing (2)
- sync/src/block_connector/write_block_chain.rs (4 hunks)
- sync/src/parallel/executor.rs (2 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- sync/src/block_connector/write_block_chain.rs
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sync/src/parallel/executor.rs (2)
57-70: Approved: Added storage checks inwaiting_for_parentsfunctionThe addition of storage checks to verify the existence of block headers and block info before proceeding enhances the robustness of the block execution process. This ensures that all parent blocks are present in storage and have associated block info before execution.
102-104: Approved: Updated method call to include storage parameterThe call to
waiting_for_parentsnow correctly includesself.storage.clone(), aligning with the updated method signature and ensuring access to storage within the method.
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New Features
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