sstablesplit
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:
- Cassandra Package installations:
$ sudo service cassandra stop
- Cassandra Tarball installations:
$ ps auwx | grep cassandra $ sudo kill pid
Usage:
- Cassandra Package installations:
sstablessplit [options] <filename> [<filename>]*
- Cassandra Tarball installations:
cd $ install_location/tools $ bin/sstablessplit [options] <filename> [<filename>]*
- DataStax Enterprise 4.8 tarball installations:
cd install_location/resources/cassandra/tools $ 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. |