23 Apr
2010
23 Apr
'10
12:25 a.m.
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 cache.
Which is what we have with ZFS + SSD-based ZIL for far less money than a NetApp.
This[1] sounds interesting...
Ray