Add restore/persist operations related metrics

The following metrics were added:
* cache/chroniclemap/keys_index_restore_latency_<cache-name> - The
  latency of restoring an index from a file (performed once during
  the plugin start).
* cache/chroniclemap/keys_index_persist_latency_<cache-name> - The
  latency of persisting an index to a file.
* cache/chroniclemap/keys_index_restore_failures_<cache-name> - The
  number of errors caught when restore cache index from file operation
  was performed
* cache/chroniclemap/keys_index_persist_failures_<cache-name> - The
  number of errors caught when persist cache index to file operation was

Bug: Issue 15121
Change-Id: I7a953562e2b3fae15282a9130bfb4218c44ff8b3
3 files changed
tree: d5122def63c02904ca6d28b11d5e8bfd23fe6903
  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.