Hello, Community Members: I am using Solr 7.7.4 I have a question about a Snapshot API. https://lucene.apache.org/solr/guide/7_4/making-and-restoring-backups.html#create-snapshot-api
I have tested basic of snapshot APIs, create snapshot, list snapshot, delete snapshot. As far as I know, when I do: - create a snapshot: create a binary file (snapshot_N where n is identical to segment_N) that contains a path of the index. - the file is created under data/snapshot_metadata directory. - list snapshot: return JSON, containing all snapshot data which show segment generation and path to the index. - delete snapshot: delete a snapshot data from snapshot_N. For me, it is impossible to "backup" or "restore" Solr's index. So, my questions are: - How snapshot APIs are related to "backup" or "restore"? - or more basically, when should I use snapshot API? - Is there any way to make a "backup" without consuming a double-size of the index? (I am asking because if I use backup API, it will copy the entire index) - what is the cheapest way to make a backup for Solr? If you help me out one of these questions or give me any clue, I will really appreciate. Sincerely, Kaya Ota
