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Caution
You're viewing documentation for an unstable version of ScyllaDB Open Source. Switch to the latest stable version.
Sorted Strings Table (SSTable) is the persistent file format used by ScyllaDB and Apache Cassandra. SSTable is saved as a persistent, ordered, immutable set of files on disk.
Immutable means SSTables are never modified; they are created by a MemTable flush and are deleted by a compaction.
The location of ScyllaDB SSTables is specified in scylla.yaml data_file_directories parameter (default location: /var/lib/scylla/data).
SSTable 3.x is more efficient and requires less disk space than the SSTable 2.x.
SSTable Version |
ScyllaDB Enterprise Version |
ScyllaDB Open Source Version |
|---|---|---|
3.x (‘me’) |
2022.2 |
5.1 and above |
3.x (‘md’) |
2021.1 |
4.3, 4.4, 4.5, 4.6, 5.0 |
3.0 (‘mc’) |
2019.1, 2020.1 |
3.x, 4.1, 4.2 |
2.2 (‘la’) |
N/A |
2.3 |
2.1.8 (‘ka’) |
2018.1 |
2.2 |
For more information about ScyllaDB 2.x SSTable formats, see below:
SSTable Compression - Deep dive into ScyllaDB/Apache Cassandra SSTable Compression
SSTable Data File - Deep dive into ScyllaDB/Apache Cassandra SSTable format
SSTable format in ScyllaDB - ScyllaDB SSTables are compatible to those in Apache Cassandra 2.1.8, but why there are more of them?
SSTable Interpretation - Deep dive into ScyllaDB/Apache Cassandra SSTable Interpretation in ScyllaDB
SSTable Summary File - Deep dive into ScyllaDB/Apache Cassandra SSTable Summary file format
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