gianm commented on code in PR #13394: URL: https://github.com/apache/druid/pull/13394#discussion_r1044866498
########## docs/dependencies/deep-storage.md: ########## @@ -25,24 +25,47 @@ title: "Deep storage" Deep storage is where segments are stored. It is a storage mechanism that Apache Druid does not provide. This deep storage infrastructure defines the level of durability of your data, as long as Druid processes can see this storage infrastructure and get at the segments stored on it, you will not lose data no matter how many Druid nodes you lose. If segments disappear from this storage layer, then you will lose whatever data those segments represented. -## Local Mount +## Local -A local mount can be used for storage of segments as well. This allows you to use just your local file system or anything else that can be mount locally like NFS, Ceph, etc. This is the default deep storage implementation. +Local storage is intended for use in the following situations: -In order to use a local mount for deep storage, you need to set the following configuration in your common configs. +- You have just one server. +- Or, you have multiple servers, and they all have access to a shared filesystem (for example: NFS). + +In order to use a local directory for deep storage, set the following configuration in `common.runtime.properties`. |Property|Possible Values|Description|Default| |--------|---------------|-----------|-------| -|`druid.storage.type`|local||Must be set.| -|`druid.storage.storageDirectory`||Directory for storing segments.|Must be set.| +|`druid.storage.type`|`local`||Must be set.| +|`druid.storage.storageDirectory`|any local directory|Directory for storing segments. Must be different from `druid.segmentCache.locations` and `druid.segmentCache.infoDir`.|`/tmp/druid/localStorage`| +|`druid.storage.zip`|`true`, `false`|Whether segments in `druid.storage.storageDirectory` are written as directories (`false`) or zip files (`true`).|`false`| Review Comment: I made this an option for risk-reduction purposes, and would prefer to keep it an option for now for that reason, but I am definitely down to make it always-not-zipped in the not-too-distant future. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
