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Tools

Metrictank comes with a bunch of helper tools.

Here is an overview of them all.

This file is generated by tools-to-doc

mt-aggs-explain

mt-aggs-explain

Usage:

	mt-aggs-explain [flags] [config-file]
           (config file defaults to /etc/metrictank/storage-aggregation.conf)

Flags:
  -metric string
    	specify a metric name to see which aggregation rule it matches
  -version
    	print version string

mt-explain

mt-explain
Explains the execution plan for a given query / set of targets

Usage:

  mt-explain

Example:

  mt-explain -from -24h -to now -mdp 1000 "movingAverage(sumSeries(foo.bar), '2min')" "alias(averageSeries(foo.*), 'foo-avg')"

mt-index-cat

mt-index-cat

Retrieves a metrictank index and dumps it in the requested format
In particular, the vegeta outputs are handy to pipe requests for given series into the vegeta http benchmark tool

Usage:

  mt-index-cat [global config flags] <idxtype> [idx config flags] output 

global config flags:

  -addr string
    	graphite/metrictank address (default "http://localhost:6060")
  -from string
    	for vegeta outputs, will generate requests for data starting from now minus... eg '30min', '5h', '14d', etc. or a unix timestamp (default "30min")
  -limit int
    	only show this many metrics.  use 0 to disable
  -max-age string
    	max age (last update diff with now) of metricdefs.  use 0 to disable (default "6h30min")
  -partitions string
    	only show metrics from the comma separated list of partitions or * for all (default "*")
  -prefix string
    	only show metrics that have this prefix
  -substr string
    	only show metrics that have this substring
  -suffix string
    	only show metrics that have this suffix
  -tags string
    	tag filter. empty (default), 'some', 'none', 'valid', or 'invalid'
  -verbose
    	print stats to stderr

tags filter:
     ''        no filtering based on tags
     'none'    only show metrics that have no tags
     'some'    only show metrics that have one or more tags
     'valid'   only show metrics whose tags (if any) are valid
     'invalid' only show metrics that have one or more invalid tags

idxtype: only 'cass' supported for now

cass config flags:

  -auth
    	enable cassandra user authentication
  -ca-path string
    	cassandra CA certficate path when using SSL (default "/etc/metrictank/ca.pem")
  -consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -create-keyspace
    	enable the creation of the index keyspace and tables, only one node needs this (default true)
  -disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -enabled
    	 (default true)
  -host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -hosts string
    	comma separated list of cassandra addresses in host:port form (default "localhost:9042")
  -keyspace string
    	Cassandra keyspace to store metricDefinitions in. (default "metrictank")
  -max-stale duration
    	clear series from the index if they have not been seen for this much time.
  -num-conns int
    	number of concurrent connections to cassandra (default 10)
  -password string
    	password for authentication (default "cassandra")
  -protocol-version int
    	cql protocol version to use (default 4)
  -prune-interval duration
    	Interval at which the index should be checked for stale series. (default 3h0m0s)
  -schema-file string
    	File containing the needed schemas in case database needs initializing (default "/etc/metrictank/schema-idx-cassandra.toml")
  -ssl
    	enable SSL connection to cassandra
  -timeout duration
    	cassandra request timeout (default 1s)
  -update-cassandra-index
    	synchronize index changes to cassandra. not all your nodes need to do this. (default true)
  -update-interval duration
    	frequency at which we should update the metricDef lastUpdate field, use 0s for instant updates (default 3h0m0s)
  -username string
    	username for authentication (default "cassandra")
  -write-queue-size int
    	Max number of metricDefs allowed to be unwritten to cassandra (default 100000)

output: either presets like dump|list|vegeta-render|vegeta-render-patterns
output: or custom templates like '{{.Id}} {{.OrgId}} {{.Name}} {{.Metric}} {{.Interval}} {{.Unit}} {{.Mtype}} {{.Tags}} {{.LastUpdate}} {{.Partition}}'


You may also use processing functions in templates:
pattern: transforms a graphite.style.metric.name into a pattern with wildcards inserted
age: subtracts the passed integer (typically .LastUpdate) from the query time
roundDuration: formats an integer-seconds duration using aggressive rounding. for the purpose of getting an idea of overal metrics age
EXAMPLES:
mt-index-cat -from 60min cass -hosts cassandra:9042 list
mt-index-cat -from 60min cass -hosts cassandra:9042 'sumSeries({{.Name | pattern}})'
mt-index-cat -from 60min cass -hosts cassandra:9042 'GET http://localhost:6060/render?target=sumSeries({{.Name | pattern}})&from=-6h\nX-Org-Id: 1\n\n'
mt-index-cat cass -hosts cassandra:9042 -timeout 60s '{{.LastUpdate | age | roundDuration}}\n' | sort | uniq -c

mt-index-migrate

mt-index-migrate

Migrate metric index from one cassandra keyspace to another.
This tool can be used for moving data to a different keyspace or cassandra cluster
or for resetting partition information when the number of partitions being used has changed.

Flags:

  -dry-run
    	run in dry-run mode. No changes will be made. (default true)
  -dst-cass-addr string
    	Address of cassandra host to migrate to. (default "localhost")
  -dst-keyspace string
    	Cassandra keyspace in use on destination. (default "raintank")
  -log-level int
    	log level. 0=TRACE|1=DEBUG|2=INFO|3=WARN|4=ERROR|5=CRITICAL|6=FATAL (default 2)
  -num-partitions int
    	number of partitions in cluster (default 1)
  -partition-scheme string
    	method used for partitioning metrics. (byOrg|bySeries) (default "byOrg")
  -schema-file string
    	File containing the needed schemas in case database needs initializing (default "/etc/metrictank/schema-idx-cassandra.toml")
  -src-cass-addr string
    	Address of cassandra host to migrate from. (default "localhost")
  -src-keyspace string
    	Cassandra keyspace in use on source. (default "raintank")

mt-kafka-mdm-sniff

mt-kafka-mdm-sniff

Inspects what's flowing through kafka (in mdm format) and reports it to you

Flags:

  -config string
    	configuration file path (default "/etc/metrictank/metrictank.ini")
  -format-md string
    	template to render MetricData with (default "{{.Part}} {{.OrgId}} {{.Id}} {{.Name}} {{.Interval}} {{.Value}} {{.Time}} {{.Unit}} {{.Mtype}} {{.Tags}}")
  -format-point string
    	template to render MetricPoint data with (default "{{.Part}} {{.MKey}} {{.Value}} {{.Time}}")
  -invalid
    	only show metrics that are invalid
  -prefix string
    	only show metrics that have this prefix
  -substr string
    	only show metrics that have this substring
you can also use functions in templates:
date: formats a unix timestamp as a date
example: mt-kafka-mdm-sniff -format-point '{{.Time | date}}'

mt-kafka-mdm-sniff-out-of-order

mt-kafka-mdm-sniff-out-of-order

Inspects what's flowing through kafka (in mdm format) and reports out of order data (does not take into account reorder buffer)

# Mechanism
* it sniffs points being added on a per-series (metric Id) level
* for every series, tracks the last 'correct' point.  E.g. a point that was able to be added to the series because its timestamp is higher than any previous timestamp
* if for any series, a point comes in with a timestamp equal or lower than the last point correct point - which metrictank would not add unless it falls within the reorder buffer - it triggers an event for this out-of-order point
every event is printed using the specified, respective format based on the message format

# Event formatting
Uses standard golang templating. E.g. {{field}} with these available fields:
NumBad - number of failed points since last successful add
DeltaTime - delta between Head and Bad time properties in seconds (point timestamps)
DeltaSeen - delta between Head and Bad seen time in seconds (consumed from kafka)
.Head.* - head is last successfully added message
.Bad.* - Bad is the current point that could not be added (assuming no re-order buffer)
under Head and Bad, the following subfields are available:
Part (partition) and Seen (when the msg was consumed from kafka)
for MetricData, prefix these with Md. : Time OrgId Id Name Metric Interval Value Unit Mtype Tags
for MetricPoint, prefix these with Mp. : Time MKey Value

Flags:

  -config string
    	configuration file path (default "/etc/metrictank/metrictank.ini")
  -do-unknown-mp
    	process MetricPoint messages for which no MetricData messages have been seen, and hence for which we can't apply prefix/substr filter (default true)
  -format string
    	template to render event with (default "{{.Bad.Md.Id}} {{.Bad.Md.Name}} {{.Bad.Mp.MKey}} {{.DeltaTime}} {{.DeltaSeen}} {{.NumBad}}")
  -prefix string
    	only show metrics with a name that has this prefix
  -substr string
    	only show metrics with a name that has this substring

mt-schemas-explain

mt-schemas-explain

Usage:

	mt-schemas-explain [flags] [config-file]
           (config file defaults to /etc/metrictank/storage-schemas.conf)

Flags:
  -int int
    	specify an interval to apply interval-based matching in addition to metric matching (e.g. to simulate kafka-mdm input)
  -metric string
    	specify a metric name to see which schema it matches
  -version
    	print version string
  -window-factor int
    	size of compaction window relative to TTL (default 20)

mt-split-metrics-by-ttl

mt-split-metrics-by-ttl [flags] ttl [ttl...]

Creates schema of metric tables split by TTLs and
assists in migrating the data to new tables.
Flags:
  -cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -cassandra-auth
    	enable cassandra authentication
  -cassandra-ca-path string
    	cassandra CA certificate path when using SSL (default "/etc/metrictank/ca.pem")
  -cassandra-consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -cassandra-disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -cassandra-host-selection-policy string
    	 (default "tokenaware,hostpool-epsilon-greedy")
  -cassandra-host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -cassandra-keyspace string
    	cassandra keyspace to use for storing the metric data table (default "metrictank")
  -cassandra-password string
    	password for authentication (default "cassandra")
  -cassandra-retries int
    	how many times to retry a query before failing it
  -cassandra-ssl
    	enable SSL connection to cassandra
  -cassandra-timeout string
    	cassandra timeout (default "1s")
  -cassandra-username string
    	username for authentication (default "cassandra")
  -cql-protocol-version int
    	cql protocol version to use (default 4)

mt-store-cat

mt-store-cat

Retrieves timeseries data from the cassandra store. Either raw or with minimal processing

Usage:

	mt-store-cat [flags] tables

	mt-store-cat [flags] <table-selector> <metric-selector> <format>
	                     table-selector: '*' or name of a table. e.g. 'metric_128'
	                     metric-selector: '*' or an id (of raw or aggregated series) or prefix:<prefix>
	                     format:
	                            - points
	                            - point-summary
	                            - chunk-summary (shows TTL's, optionally bucketed. See groupTTL flag)

EXAMPLES:
mt-store-cat -cassandra-keyspace metrictank -from='-1min' '*' '1.77c8c77afa22b67ef5b700c2a2b88d5f' points
mt-store-cat -cassandra-keyspace metrictank -from='-1month' '*' 'prefix:fake' point-summary
mt-store-cat -cassandra-keyspace metrictank '*' 'prefix:fake' chunk-summary
mt-store-cat -groupTTL h -cassandra-keyspace metrictank 'metric_512' '1.37cf8e3731ee4c79063c1d55280d1bbe' chunk-summary
Flags:
  -cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -cassandra-auth
    	enable cassandra authentication
  -cassandra-ca-path string
    	cassandra CA certificate path when using SSL (default "/etc/metrictank/ca.pem")
  -cassandra-consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -cassandra-create-keyspace
    	enable the creation of the mdata keyspace and tables, only one node needs this (default true)
  -cassandra-disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -cassandra-host-selection-policy string
    	 (default "tokenaware,hostpool-epsilon-greedy")
  -cassandra-host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -cassandra-keyspace string
    	cassandra keyspace to use for storing the metric data table (default "metrictank")
  -cassandra-omit-read-timeout string
    	if a read is older than this, it will directly be omitted without executing (default "60s")
  -cassandra-password string
    	password for authentication (default "cassandra")
  -cassandra-read-concurrency int
    	max number of concurrent reads to cassandra. (default 20)
  -cassandra-read-queue-size int
    	max number of outstanding reads before reads will be dropped. This is important if you run queries that result in many reads in parallel. (default 200000)
  -cassandra-retries int
    	how many times to retry a query before failing it
  -cassandra-schema-file string
    	File containing the needed schemas in case database needs initializing (default "/etc/metrictank/schema-store-cassandra.toml")
  -cassandra-ssl
    	enable SSL connection to cassandra
  -cassandra-timeout string
    	cassandra timeout (default "1s")
  -cassandra-username string
    	username for authentication (default "cassandra")
  -config string
    	configuration file path (default "/etc/metrictank/metrictank.ini")
  -cql-protocol-version int
    	cql protocol version to use (default 4)
  -fix int
    	fix data to this interval like metrictank does quantization. only for points and points-summary format
  -from string
    	get data from (inclusive). only for points and points-summary format (default "-24h")
  -groupTTL string
    	group chunks in TTL buckets based on s (second. means unbucketed), m (minute), h (hour) or d (day). only for chunk-summary format (default "d")
  -print-ts
    	print time stamps instead of formatted dates. only for points and poins-summary format
  -time-zone string
    	time-zone to use for interpreting from/to when needed. (check your config) (default "local")
  -to string
    	get data until (exclusive). only for points and points-summary format (default "now")
  -version
    	print version string
  -window-factor int
    	size of compaction window relative to TTL (default 20)
Notes:
 * Using `*` as metric-selector may bring down your cassandra. Especially chunk-summary ignores from/to and queries all data.
   With great power comes great responsibility
 * points that are not in the `from <= ts < to` range, are prefixed with `-`. In range has prefix of '>`
 * When using chunk-summary, if there's data that should have been expired by cassandra, but for some reason didn't, we won't see or report it
 * Doesn't automatically return data for aggregated series. It's up to you to query for an AMKey (id_<rollup>_<span>) when appropriate
 * (rollup is one of sum, cnt, lst, max, min and span is a number in seconds)

mt-store-cp-experimental

mt-store-cp [flags] table-in [table-out]

Copies data in Cassandra to use another table (and possibly another cluster).
It is up to you to assure table-out exists before running this tool
This tool is EXPERIMENTAL and needs doublechecking whether data is successfully written to Cassandra
see https://github.com/grafana/metrictank/pull/909 for details
Please report good or bad experiences in the above ticket or in a new one
Flags:
  -cassandra-auth
    	enable cassandra authentication
  -cassandra-ca-path string
    	cassandra CA certificate path when using SSL (default "/etc/metrictank/ca.pem")
  -cassandra-concurrency int
    	max number of concurrent reads to cassandra. (default 20)
  -cassandra-consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -cassandra-disable-host-lookup
    	disable host lookup (useful if going through proxy)
  -cassandra-host-selection-policy string
    	 (default "tokenaware,hostpool-epsilon-greedy")
  -cassandra-host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -cassandra-keyspace string
    	cassandra keyspace to use for storing the metric data table (default "metrictank")
  -cassandra-password string
    	password for authentication (default "cassandra")
  -cassandra-retries int
    	how many times to retry a query before failing it
  -cassandra-ssl
    	enable SSL connection to cassandra
  -cassandra-timeout string
    	cassandra timeout (default "1s")
  -cassandra-username string
    	username for authentication (default "cassandra")
  -cql-protocol-version int
    	cql protocol version to use (default 4)
  -dest-cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -end-timestamp int
    	timestamp at which to stop, defaults to int max (default 2147483647)
  -end-token int
    	token to stop at (inclusive), defaults to math.MaxInt64 (default 9223372036854775807)
  -idx-table string
    	idx table in cassandra (default "metric_idx")
  -max-batch-size int
    	max number of queries per batch (default 10)
  -partitions string
    	process ids for these partitions (comma separated list of partition numbers or '*' for all) (default "*")
  -progress-rows int
    	number of rows between progress output (default 1000000)
  -source-cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -start-timestamp int
    	timestamp at which to start, defaults to 0
  -start-token int
    	token to start at (inclusive), defaults to math.MinInt64 (default -9223372036854775808)
  -threads int
    	number of workers to use to process data (default 1)
  -verbose
    	show every record being processed

mt-update-ttl

mt-update-ttl [flags] ttl table-in [table-out]

Adjusts the data in Cassandra to use a new TTL value. The TTL is applied counting from the timestamp of the data
If table-out not specified or same as table-in, will update in place. Otherwise will not touch input table and store results in table-out
In that case, it is up to you to assure table-out exists before running this tool
Not supported yet: for the per-ttl tables as of 0.7, automatically putting data in the right table
Flags:
  -cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -cassandra-auth
    	enable cassandra authentication
  -cassandra-ca-path string
    	cassandra CA certificate path when using SSL (default "/etc/metrictank/ca.pem")
  -cassandra-concurrency int
    	max number of concurrent reads to cassandra. (default 20)
  -cassandra-consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -cassandra-disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -cassandra-host-selection-policy string
    	 (default "tokenaware,hostpool-epsilon-greedy")
  -cassandra-host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -cassandra-keyspace string
    	cassandra keyspace to use for storing the metric data table (default "metrictank")
  -cassandra-password string
    	password for authentication (default "cassandra")
  -cassandra-retries int
    	how many times to retry a query before failing it
  -cassandra-ssl
    	enable SSL connection to cassandra
  -cassandra-timeout string
    	cassandra timeout (default "1s")
  -cassandra-username string
    	username for authentication (default "cassandra")
  -cql-protocol-version int
    	cql protocol version to use (default 4)
  -end-timestamp int
    	timestamp at which to stop, defaults to int max (default 2147483647)
  -start-timestamp int
    	timestamp at which to start, defaults to 0
  -threads int
    	number of workers to use to process data (default 1)
  -verbose
    	show every record being processed

mt-view-boundaries

mt-view-boundaries

Shows boundaries of rows in cassandra and of spans of specified size.
to see UTC times, just prefix command with TZ=UTC

  -span string
    	see boundaries for chunks of this span
  -version
    	print version string

mt-whisper-importer-reader

Usage of ./mt-whisper-importer-reader:
  -dst-schemas string
    	The filename of the output schemas definition file
  -http-auth string
    	The credentials used to authenticate in the format "user:password"
  -http-endpoint string
    	The http endpoint to send the data to (default "http://127.0.0.1:8080/chunks")
  -import-after uint
    	Only import after the specified timestamp
  -import-up-to uint
    	Only import up to the specified timestamp (default 4294967295)
  -insecure-ssl
    	Disables ssl certificate verification
  -name-filter string
    	A regex pattern to be applied to all metric names, only matching ones will be imported
  -name-prefix string
    	Prefix to prepend before every metric name, should include the '.' if necessary
  -orgid int
    	Organization ID the data belongs to  (default 1)
  -position-file string
    	file to store position and load position from
  -threads int
    	Number of workers threads to process and convert .wsp files (default 10)
  -verbose
    	More detailed logging
  -whisper-directory string
    	The directory that contains the whisper file structure (default "/opt/graphite/storage/whisper")
  -write-unfinished-chunks
    	Defines if chunks that have not completed their chunk span should be written

mt-whisper-importer-writer

mt-whisper-importer-writer

Opens an endpoint to send data to, which then gets stored in the MT internal DB(s)

Usage:

  mt-whisper-importer-writer [global config flags] <idxtype> [idx config flags] 

global config flags:

  -cassandra-addrs string
    	cassandra host (may be given multiple times as comma-separated list) (default "localhost")
  -cassandra-auth
    	enable cassandra authentication
  -cassandra-ca-path string
    	cassandra CA certificate path when using SSL (default "/etc/metrictank/ca.pem")
  -cassandra-consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -cassandra-create-keyspace
    	enable the creation of the mdata keyspace and tables, only one node needs this (default true)
  -cassandra-disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -cassandra-host-selection-policy string
    	 (default "tokenaware,hostpool-epsilon-greedy")
  -cassandra-host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -cassandra-keyspace string
    	cassandra keyspace to use for storing the metric data table (default "metrictank")
  -cassandra-omit-read-timeout string
    	if a read is older than this, it will directly be omitted without executing (default "60s")
  -cassandra-password string
    	password for authentication (default "cassandra")
  -cassandra-read-concurrency int
    	max number of concurrent reads to cassandra. (default 20)
  -cassandra-read-queue-size int
    	max number of outstanding reads before reads will be dropped. This is important if you run queries that result in many reads in parallel. (default 200000)
  -cassandra-retries int
    	how many times to retry a query before failing it
  -cassandra-schema-file string
    	File containing the needed schemas in case database needs initializing (default "/etc/metrictank/schema-store-cassandra.toml")
  -cassandra-ssl
    	enable SSL connection to cassandra
  -cassandra-timeout string
    	cassandra timeout (default "1s")
  -cassandra-username string
    	username for authentication (default "cassandra")
  -cassandra-window-factor int
    	size of compaction window relative to TTL (default 20)
  -cassandra-write-concurrency int
    	max number of concurrent writes to cassandra. (default 10)
  -cql-protocol-version int
    	cql protocol version to use (default 4)
  -exit-on-error
    	Exit with a message when there's an error (default true)
  -http-endpoint string
    	The http endpoint to listen on (default "127.0.0.1:8080")
  -num-partitions int
    	Number of Partitions (default 1)
  -overwrite-chunks
    	If true existing chunks may be overwritten (default true)
  -partition-scheme string
    	method used for partitioning metrics. This should match the settings of tsdb-gw. (byOrg|bySeries) (default "bySeries")
  -ttls string
    	list of ttl strings used by MT separated by ',' (default "35d")
  -uri-path string
    	the URI on which we expect chunks to get posted (default "/chunks")
  -verbose
    	More detailed logging

idxtype: only 'cass' supported for now

cass config flags:

  -auth
    	enable cassandra user authentication
  -ca-path string
    	cassandra CA certficate path when using SSL (default "/etc/metrictank/ca.pem")
  -consistency string
    	write consistency (any|one|two|three|quorum|all|local_quorum|each_quorum|local_one (default "one")
  -create-keyspace
    	enable the creation of the index keyspace and tables, only one node needs this (default true)
  -disable-initial-host-lookup
    	instruct the driver to not attempt to get host info from the system.peers table
  -enabled
    	 (default true)
  -host-verification
    	host (hostname and server cert) verification when using SSL (default true)
  -hosts string
    	comma separated list of cassandra addresses in host:port form (default "localhost:9042")
  -keyspace string
    	Cassandra keyspace to store metricDefinitions in. (default "metrictank")
  -max-stale duration
    	clear series from the index if they have not been seen for this much time.
  -num-conns int
    	number of concurrent connections to cassandra (default 10)
  -password string
    	password for authentication (default "cassandra")
  -protocol-version int
    	cql protocol version to use (default 4)
  -prune-interval duration
    	Interval at which the index should be checked for stale series. (default 3h0m0s)
  -schema-file string
    	File containing the needed schemas in case database needs initializing (default "/etc/metrictank/schema-idx-cassandra.toml")
  -ssl
    	enable SSL connection to cassandra
  -timeout duration
    	cassandra request timeout (default 1s)
  -update-cassandra-index
    	synchronize index changes to cassandra. not all your nodes need to do this. (default true)
  -update-interval duration
    	frequency at which we should update the metricDef lastUpdate field, use 0s for instant updates (default 3h0m0s)
  -username string
    	username for authentication (default "cassandra")
  -write-queue-size int
    	Max number of metricDefs allowed to be unwritten to cassandra (default 100000)

EXAMPLES:
mt-whisper-importer-writer -cassandra-addrs=192.168.0.1 -cassandra-keyspace=mydata -exit-on-error=true -fake-avg-aggregates=true -http-endpoint=0.0.0.0:8080 -num-partitions=8 -partition-scheme=bySeries -ttls=8d,2y -uri-path=/chunks -verbose=true -cassandra-window-factor=20 cass -hosts=192.168.0.1:9042 -keyspace=mydata