Andrew Morton writes:
"Cabot, Mason B" <[email protected]> wrote:
I've been testing the NAS performance of ext3/Openfiler 2.2 against
NTFS/WinXP and have found that NTFS significantly outperforms ext3 for
video workloads. The Windows CIFS client will attempt a poor-man's
pre-allocation of the file on the server by sending 1-byte writes at
128K-byte strides, breaking block allocation on ext3 and leading to
fragmentation and poor performance. This will happen for many
applications (including iTunes) as the CIFS client issues these
pre-allocates under the application layer.
Oh my gawd, what a stupid hack. Now we know what the
MS interoperability lab has been working on.
Stupid or not, this is their protocol. The cifs filesystem
driver needs a patch to do this. Probably that'll help get
better performance when Linux is writing to a Windows server.
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