Hi,
I'm currently testing a small fileserver, using an array of SCA disks
with xfs on top of software raid5. The chunk size of the raid is set
to 4k, as is the sector size for the xfs filesystem. To be more
precise, the file system was created with
| # mkfs -t xfs -f -s size=4096 -l size=16384b /dev/md0
| meta-data=/dev/md0 isize=256 agcount=32, agsize=5608052 blks
| = sectsz=4096
| data = bsize=4096 blocks=179457664, imaxpct=25
| = sunit=1 swidth=6 blks, unwritten=1
| naming =version 2 bsize=4096
| log =internal log bsize=4096 blocks=16384, version=2
| = sectsz=4096 sunit=1 blks
| realtime =none extsz=24576 blocks=0, rtextents=0
While the setup performs well in general, I am a bit disappointed at
the file creation speed - for example, unpacking a Linux kernel tree
(a bit more than 200MB in a bit less than 20k files and directories)
takes more than a minute and a half. The same is true for removing
the whole thing again. On the other hand, reading is really fast.
Any suggestions on tuning the file system or the software raid to
obtain better performance? I'm also open to suggestions involving a
different file system altogether.
Regards, Jens.
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