Persist cache keys index to a file

Persist cache keys index after every prune operation (temporarily) and
additionally on cache close operation.

* it is persisted to '[cache_file_name].index.tmp' file and once
  operation is finished renamed to '[cache_file_name].index' so that
  in case when Gerrit is abruptly closed the index file is not

Bug: Issue 15121
Change-Id: Ib2013cede2be758148a7031ff6942f5c2b035caf
6 files changed
tree: 8cf6a95139b10739cd9fc426f0bed10869d72fab
  1. src/
  2. .gitignore
  3. BUILD
  4. external_plugin_deps.bzl
  5. Jenkinsfile

Persistent cache for Gerrit, based on ChronicleMap

Non-blocking and super-fast on-disk cache libModule for Gerrit Code Review based on ChronicleMap on-disk implementation.

How to build

This libModule is built like a Gerrit in-tree plugin, using Bazelisk. See the build instructions for more details.


  • Install cache-chronicalmap module

Install the chronicle-map module into the $GERRIT_SITE/lib directory.

Add the cache-chroniclemap module to $GERRIT_SITE/etc/gerrit.config as follows:

  installModule = com.googlesource.gerrit.modules.cache.chroniclemap.ChronicleMapCacheModule

For further information and supported options, refer to config documentation.

Migration from H2 caches

You can check how to migrate from H2 to chronicle-map here.