The sstablesplit utility
Use this tool to split SSTables files into multiple SSTables of a maximum designated size.
Use this tool to split SSTables files into multiple SSTables of a maximum designated size. For example, if SizeTieredCompactionStrategy was used for a major compaction and results in a excessively large SSTable, it's a good idea to split the table because won't get compacted again until the next huge compaction.
Cassandra must be stopped to use this tool:
- Packaged installs:
$ sudo service cassandra stop
- Tarball installs:
$ ps auwx | grep cassandra $ sudo kill pid
Usage:
- Packaged installs: sstablessplit [options] <filename> [<filename>]*
- Tarball installs:
install_location/bin/sstablessplit [options] <filename> [<filename>]*
Example:
$ sstablesplit -s 40 /var/lib/cassandra/data/Keyspace1/Standard1/*
| Flag | Option | Description |
|---|---|---|
| --debug | Display stack traces. | |
| -h | --help | Display help. |
| --no-snapshot | Do not snapshot the SSTables before splitting. | |
| -s | --size <size> | Maximum size in MB for the output SSTables (default: 50). |
| -v | --verbose | Verbose output. |