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app/vmselect: clarify that it isnt recommended setting -replicationFactor at vmselect nodes even if the replication is enabled at vminsert nodes

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Aliaksandr Valialkin 2022-11-18 14:03:42 +02:00
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2
README.md
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@ -980,7 +980,7 @@ Below is the output for `/path/to/vmselect -help`:
Optional URL to push metrics exposed at /metrics page. See https://docs.victoriametrics.com/#push-metrics . By default metrics exposed at /metrics page aren't pushed to any remote storage
Supports an array of values separated by comma or specified via multiple flags.
-replicationFactor int
How many copies of every time series is available on vmstorage nodes. See -replicationFactor command-line flag for vminsert nodes (default 1)
How many copies of every time series is available on vmstorage nodes. vmselect cancels responses from the slowest -replicationFactor-1 vmstorage nodes if -replicationFactor is set by assuming it already received complete data. It isn't recommended setting this flag to values other than 1 at vmselect nodes, since it may result in incomplete responses after adding new vmstorage nodes even if the replication is enabled at vminsert nodes (default 1)
-search.cacheTimestampOffset duration
The maximum duration since the current time for response data, which is always queried from the original raw data, without using the response cache. Increase this value if you see gaps in responses due to time synchronization issues between VictoriaMetrics and data sources (default 5m0s)
-search.denyPartialResponse

4
app/vmselect/netstorage/netstorage.go
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@ -36,7 +36,9 @@ import (
var (
replicationFactor = flag.Int("replicationFactor", 1, "How many copies of every time series is available on vmstorage nodes. "+
"See -replicationFactor command-line flag for vminsert nodes")
"vmselect cancels responses from the slowest -replicationFactor-1 vmstorage nodes if -replicationFactor is set by assuming it already received complete data. "+
"It isn't recommended setting this flag to values other than 1 at vmselect nodes, since it may result in incomplete responses "+
"after adding new vmstorage nodes even if the replication is enabled at vminsert nodes")
maxSamplesPerSeries = flag.Int("search.maxSamplesPerSeries", 30e6, "The maximum number of raw samples a single query can scan per each time series. See also -search.maxSamplesPerQuery")
maxSamplesPerQuery = flag.Int("search.maxSamplesPerQuery", 1e9, "The maximum number of raw samples a single query can process across all time series. This protects from heavy queries, which select unexpectedly high number of raw samples. See also -search.maxSamplesPerSeries")
vmstorageDialTimeout = flag.Duration("vmstorageDialTimeout", 5*time.Second, "Timeout for establishing RPC connections from vmselect to vmstorage")

2
docs/Cluster-VictoriaMetrics.md
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@ -984,7 +984,7 @@ Below is the output for `/path/to/vmselect -help`:
Optional URL to push metrics exposed at /metrics page. See https://docs.victoriametrics.com/#push-metrics . By default metrics exposed at /metrics page aren't pushed to any remote storage
Supports an array of values separated by comma or specified via multiple flags.
-replicationFactor int
How many copies of every time series is available on vmstorage nodes. See -replicationFactor command-line flag for vminsert nodes (default 1)
How many copies of every time series is available on vmstorage nodes. vmselect cancels responses from the slowest -replicationFactor-1 vmstorage nodes if -replicationFactor is set by assuming it already received complete data. It isn't recommended setting this flag to values other than 1 at vmselect nodes, since it may result in incomplete responses after adding new vmstorage nodes even if the replication is enabled at vminsert nodes (default 1)
-search.cacheTimestampOffset duration
The maximum duration since the current time for response data, which is always queried from the original raw data, without using the response cache. Increase this value if you see gaps in responses due to time synchronization issues between VictoriaMetrics and data sources (default 5m0s)
-search.denyPartialResponse