Yanqin Jin 54de56844d Remove random writes from SST file ingestion (#4172) ... Summary: RocksDB used to store global_seqno in external SST files written by SstFileWriter. During file ingestion, RocksDB uses `pwrite` to update the `global_seqno`. Since random write is not supported in some non-POSIX compliant file systems, external SST file ingestion is not supported on these file systems. To address this limitation, we no longer update `global_seqno` during file ingestion. Later RocksDB uses the MANIFEST and other information in table properties to deduce global seqno for externally-ingested SST files. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4172 Differential Revision: D8961465 Pulled By: riversand963 fbshipit-source-id: 4382ec85270a96be5bc0cf33758ca2b167b05071		2018-07-27 16:12:23 -07:00
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rocksdb	Remove random writes from SST file ingestion (#4172)	2018-07-27 16:12:23 -07:00