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2009 Feb 27
3
ext3 heavy file fragmentation with NFS write
Hello,
Does anybody know how to avoid the file fragmentation when a file is
created over NFSv3?
A file created locally is OK:
dd bs=32k if=/dev/zero of=test count=32x1024 conv=fsync
filefrag test
test: 10 extents found, perfection would be 9 extents
When I create the file in the same dir, but from another machine,
mounted over NFS:
filefrag test
test: 4833 extents found, perfection would be 9 extents
With such a file a sequential read is quite slow (~76MB vs >...