SQL Server Linux: fsync and Buffered I/O
SQL Server According to Bob
DECEMBER 18, 2018
This means data can be stored in file system cache, non-stable media. ) The issue, as described in the link, is that the sync returns the error but may clear the state of the cached pages. The next sync returns ESUCCESS, meaning the the write(s), which were in cache, do not flush to stable media but applications were told they did.
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