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README.md: mention that unused snapshots must be deleted

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Aliaksandr Valialkin 2019-06-03 17:26:35 +03:00
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@ -186,6 +186,7 @@ The following steps must be performed for each `vmstorage` node for creating a b
2. Archive the created snapshot from `<-storageDataPath>/snapshots/<snapshot_name>` folder using any suitable tool that follows symlinks. For instance,
`cp -L`, `rsync -L` or `scp -r`. The archival process doesn't interfere with `vmstorage` work, so it may be performed at any suitable time.
Incremental backups are possible with `rsync --delete`, which should [remove extraneous files from backup dir](https://askubuntu.com/questions/476041/how-do-i-make-rsync-delete-files-that-have-been-deleted-from-the-source-folder).
3. Delete unused snapshots via `/snapshot/delete?snapshot=<snapshot_name>` or `/snapshot/delete_all` in order to free up occupied storage space.
There is no need in synchronizing backups among all the `vmstorage` nodes.