Solving the ext3 latency problem
Posted Apr 14, 2009 18:40 UTC (Tue) by mrshiny
Parent article: Solving the ext3 latency problem
I don't understand this:
There is one other important change needed to get a truly quick fsync() with ext3, though: the filesystem must be mounted in data=writeback mode.
Is this because the changes to fsync are disabled in data=ordered, or just because the performance gains are small compared to the overhead of data=ordered?
I'm curious because if fsync is slow application developers won't use it, even if on some systems it's fast. It will be years before application developers start using it "properly" again.
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