[CentOS] OT: Caching synchronous writes
Ray Van Dolson
rayvd at bludgeon.org
Thu Apr 22 22:25:30 UTC 2010
On Thu, Apr 22, 2010 at 02:06:47PM -0700, nate wrote:
> Ray Van Dolson wrote:
> > The "delayed allocation" features in ext4 (and xfs, reiser4) sound
> > interesting. Might give a little performance boost for synchronous
> > write workloads....
> Doesn't delayed allocation defeat the purpose of a synchronous write?
I don't know for sure. From reading, it sounds like as far as data
integrity is concerned it would fall somewhere between complete
write-through synchronous writes and asynchronous writes.
> I think what you want is a proper storage array with mirrored write
Which is what we have with ZFS + SSD-based ZIL for far less money than
This sounds interesting...
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