Andrew Kryczka f5148ade10 support opening zero backups during engine init ... Summary: There are internal users who open BackupEngine for writing new backups only, and they don't care whether old backups can be read or not. The condition `BackupableDBOptions::max_valid_backups_to_open == 0` should be supported (previously in df74b775e6 I made the mistake of choosing 0 as a special value to disable the limit). Closes https://github.com/facebook/rocksdb/pull/2819 Differential Revision: D5751599 Pulled By: ajkr fbshipit-source-id: e73ac19eb5d756d6b68601eae8e43407ee4f2752		2017-09-12 13:26:34 -07:00
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rocksdb	support opening zero backups during engine init	2017-09-12 13:26:34 -07:00