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RelStorage 2.0.0b5

A backend for ZODB that stores pickles in a relational database.

RelStorage is a storage implementation for ZODB that stores pickles in a relational database. PostgreSQL 9.0 and above, MySQL 5.0.32+ / 5.1.34+, and Oracle 10g and 11g are currently supported. RelStorage replaced the PGStorage project.


  • It is a drop-in replacement for FileStorage and ZEO.
  • There is a simple way to convert FileStorage to RelStorage and back again. You can also convert a RelStorage instance to a different relational database.
  • Designed for high volume sites: multiple ZODB instances can share the same database. This is similar to ZEO, but RelStorage does not require ZEO.
  • According to some tests, RelStorage handles high concurrency better than the standard combination of ZEO and FileStorage.
  • Whereas FileStorage takes longer to start as the database grows due to an in-memory index of all objects, RelStorage starts quickly regardless of database size.
  • Supports undo, packing, and filesystem-based ZODB blobs.
  • Both history-preserving and history-free storage are available.
  • Capable of failover to replicated SQL databases.
  • zodbconvert utility to copy databases.
  • Free, open source (ZPL 2.1)


Documentation including installation instructions is hosted on readthedocs.

The complete changelog is also there.


RelStorage is hosted at GitHub:
File Type Py Version Uploaded on Size
RelStorage-2.0.0b5-py2.py3-none-any.whl (md5) Python Wheel py2.py3 2016-08-24 145KB
RelStorage-2.0.0b5.tar.gz (md5) Source 2016-08-24 247KB