Slower performance with ext4
markir at paradise.net.nz
Mon Nov 2 07:55:22 UTC 2009
Christopher Chan wrote:
> No, it is more a problem of the myth of fsync guaranteeing data is
> committed to the filesystem every time.
> Not even the specification explicitly spells that out.
> ext4 fsync is only safe if data=journal is used and write-caches are
> either disabled or have a bbu.
Sigh - write cache disabled *or* write barriers supported by underlying
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