Update README.md

Author: Mokto

README.md

@@ -46,6 +46,12 @@ By default, PostgreSQL is installed as part of the chart. To use an external Pos
 
 To avoid issues when upgrade this chart, provide `postgresql.postgresqlPassword` for subsequent upgrades. This is due to an issue in the PostgreSQL chart where password will be overwritten with randomly generated passwords otherwise. See https://github.com/helm/charts/tree/master/stable/postgresql#upgrade for more detail.
 
+## Persistence
+
+This chart is capable of mounting the sentry-data PV in the Sentry worker and cron pods. This feature is disabled by default, but is needed for some advanced features such as private sourcemaps.
+
+You may enable mounting of the sentry-data PV across worker and cron pods by changing filestore.filesystem.persistence.persistentWorkers to true. If you plan on deploying Sentry containers across multiple nodes, you may need to change your PVC's access mode to ReadWriteMany and check that your PV supports mounting across multiple nodes.
+
 ## Roadmap
 
 - [X] Lint in Pull requests