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snapshot - Take a snapshot of specified keyspaces or a snapshot of the specified table
nodetool [(-h <host> | --host <host>)] [(-p <port> | --port <port>)]
[(-pp | --print-port)] [(-pw <password> | --password <password>)]
[(-pwf <passwordFilePath> | --password-file <passwordFilePath>)]
[(-u <username> | --username <username>)] snapshot
[(-cf <table> | --column-family <table> | --table <table>)]
[(-kc <kclist> | --kc.list <kclist>)]
[(-sf | --skip-flush)] [(-t <tag> | --tag <tag>)] [--] [<keyspaces...>]
Parameter |
Description |
|---|---|
-cf <table> / –column-family <table>, –table <table> |
The table name (you must specify one and only one keyspace for using this option) |
-h <host> / –host <host> |
Node hostname or ip address |
-kc <ktlist>, –kc.list <ktlist> |
The list of Keyspaces to take snapshot |
-p <port> / –port <port> |
Remote jmx agent port number |
-sf / –skip-flush |
Do not flush memtables before snapshotting (snapshot will not contain unflushed data) |
-t <tag> / –tag <tag> |
The name of the snapshot |
-- This option can be used to separate command-line options from the list of argument, (useful when arguments might be mistaken for command-line options.
[<keyspaces...>] List of keyspaces. By default, all keyspaces.
Snapshot all the keyspaces
> nodetool snapshot
Requested creating snapshot(s) for [all keyspaces] with snapshot name [1564577645291] and options {skipFlush=false}
Snapshot directory: 1564577645291
Snapshot a keyspace (mykeyspace)
> nodetool snapshot mykeyspace;
Requested creating snapshot(s) for [mykeyspace] with snapshot name [1564577611409] and options {skipFlush=false}
Snapshot directory: 1564577611409
Snapshot a list of keyspaces
>nodetool snapshot -kc mykeyspace,yourkeyspace
Requested creating snapshot(s) for [mykeyspace,yourkeyspace] with snapshot name [1564639559884] and options {skipFlush=false}
Snapshot directory: 1564639559884
Snapshot a table (heartrate)
> nodetool snapshot --table heartrate mykeyspace;
Requested creating snapshot(s) for [mykeyspace] with snapshot name [1564577586524] and options {skipFlush=false}
Snapshot directory: 1564577586524
The snapshot is created in a snapshot directory in the table SSTable data directory. For example, repeating the heartrate command above three times will create three snapshots for table heartrate in keyspace mykeyspace
> ls /var/lib/scylla/data/mykeyspace/heartrate-07669030b39211e9a057000000000000/snapshots/
1564577586524 1564577611409 1564577645291
Each of the snapshots is a hardlink to to the SSTable directory.
> ls -1a /var/lib/scylla/data/mykeyspace/heartrate-07669030b39211e9a057000000000000/snapshots/1564577586524
la-1-big-CompressionInfo.db
la-1-big-Data.db
la-1-big-Digest.sha1
la-1-big-Filter.db
la-1-big-Index.db
la-1-big-Scylla.db
la-1-big-Statistics.db
la-1-big-Summary.db
la-1-big-TOC.txt
manifest.json
Copyright
© 2016, The Apache Software Foundation.
Apache®, Apache Cassandra®, Cassandra®, the Apache feather logo and the Apache Cassandra® Eye logo are either registered trademarks or trademarks of the Apache Software Foundation in the United States and/or other countries. No endorsement by The Apache Software Foundation is implied by the use of these marks.
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