RelStorage

A backend for ZODB that stores pickles in a relational database. (Python 2 and 3, PyPy, current ZODB versions.)

These details have not been verified by PyPI

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Project description

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.

Features

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

Documentation including installation instructions is hosted on readthedocs.

The complete changelog is also there.

Development

RelStorage is hosted at GitHub:

https://github.com/zodb/relstorage

Project details

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Release history Release notifications | RSS feed

4.2.0

Sep 29, 2025

4.1.1

Dec 12, 2024

4.1.0

Oct 11, 2024

4.0.0

Dec 11, 2023

4.0.0a1 pre-release

Jun 30, 2023

3.5.0

Sep 16, 2022

3.5.0a6 pre-release

Jul 21, 2021

3.5.0a4 pre-release

Jun 9, 2021

3.5.0a3 pre-release

May 26, 2021

3.5.0a2 pre-release

May 24, 2021

3.5.0a1 pre-release

May 17, 2021

3.4.5

Apr 23, 2021

3.4.4

Apr 23, 2021

3.4.3

Apr 22, 2021

3.4.2

Apr 21, 2021

3.4.1

Apr 12, 2021

3.4.0

Oct 19, 2020

3.3.2

Sep 21, 2020

3.3.1

Sep 14, 2020

3.3.0

Sep 14, 2020

3.2.1

Aug 28, 2020

3.2.0

Jul 21, 2020

3.1.3.dev0 pre-release

Jul 14, 2020

3.1.2

Jul 14, 2020

3.1.1

Jul 2, 2020

3.1.0

Jun 11, 2020

3.0.1

Nov 22, 2019

3.0.0

Nov 12, 2019

3.0rc1 pre-release

Nov 8, 2019

3.0b3 pre-release

Oct 29, 2019

3.0b2 pre-release

Oct 28, 2019

3.0b1 pre-release

Oct 23, 2019

3.0a13 pre-release

Oct 21, 2019

3.0a12 pre-release

Oct 9, 2019

3.0a11 pre-release

Sep 25, 2019

3.0a10 pre-release

Sep 4, 2019

3.0a9 pre-release

Aug 28, 2019

3.0a8 pre-release

Aug 13, 2019

3.0a7 pre-release

Aug 8, 2019

3.0a6 pre-release

Jul 29, 2019

3.0a5 pre-release

Jul 11, 2019

3.0a4 pre-release

Jul 10, 2019

3.0a3 pre-release

Jun 26, 2019

3.0a2 pre-release

Jun 19, 2019

3.0a1 pre-release

Jun 12, 2019

2.1.1

Jan 7, 2019

2.1.0

Feb 7, 2018

2.1a2 pre-release

Apr 15, 2017

2.1a1 pre-release

Feb 1, 2017

2.0.0

Dec 23, 2016

2.0.0rc1 pre-release

Dec 12, 2016

2.0.0b9 pre-release

Nov 29, 2016

This version

2.0.0b8 pre-release

Oct 2, 2016

2.0.0b7 pre-release

Oct 1, 2016

2.0.0b6 pre-release

Sep 8, 2016

2.0.0b5 pre-release

Aug 24, 2016

2.0.0b4 pre-release

Jul 17, 2016

2.0.0b3 pre-release

Jul 16, 2016

2.0.0b2 pre-release

Jul 8, 2016

2.0.0b1 pre-release

Jun 28, 2016

1.6.3

Sep 30, 2016

1.6.2

Aug 31, 2016

1.6.1

Aug 30, 2016

1.6.0

Jun 9, 2016

1.6.0b3 pre-release

Dec 8, 2014

1.6.0b2 pre-release

Oct 3, 2014

1.6.0b1 pre-release

Sep 5, 2014

1.5.1

Nov 12, 2011

1.5.0

Jun 30, 2011

1.5.0b2 pre-release

Mar 2, 2011

1.5.0b1 pre-release

Feb 5, 2011

1.5.0a1 pre-release

Oct 22, 2010

1.4.2

Feb 4, 2011

1.4.1

Oct 22, 2010

1.4.0

Sep 30, 2010

1.4.0c4 pre-release

Sep 17, 2010

1.4.0c3 pre-release

Jul 31, 2010

1.4.0c2 pre-release

Jul 29, 2010

1.4.0c1 pre-release

Jun 20, 2010

1.4.0b3 pre-release

Feb 2, 2010

1.4.0b2 pre-release

Jan 30, 2010

1.4.0b1 pre-release

Nov 17, 2009

1.3.0b1 pre-release

Sep 5, 2009

1.2.0

Sep 5, 2009

1.2.0b2 pre-release

May 6, 2009

1.1.3

Feb 4, 2009

1.1.2

Jan 27, 2009

1.1.1

Dec 28, 2008

1.1

Dec 19, 2008

1.1c1 pre-release

Jul 23, 2008

1.1b2 pre-release

May 31, 2008

1.1b1 pre-release

Apr 29, 2008

1.0.1

Mar 12, 2008

1.0

Feb 29, 2008

1.0c1 pre-release

Feb 27, 2008

1.0-beta1 pre-release

Feb 22, 2008

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RelStorage 2.0.0b8

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