Hello,
I have a RAID-6 Partition with the Areca ARC-1231 card on a S5000PAL
Intel system with 6 disks as part of the raid volume. The system has
been set up as Write-back cache and the raid card has a 2 GIG memory
cache on it. It is installed on Freebsd 7.0 STABLE with SCHED_ULE enabled.
I have a folder with a lot of small and big files in it that total
3009 files. In the user system we have 2200 users in the password file.
1) When I do a ls -lh on the raid 6 array with 6 disks in the array
it takes aver 16 seconds before it starts to display anything on the screen.
2) While running a tar command on another shell, the time goes to 28
seconds for the same list to start showing.
3) When I do a ls (with no other options) it starts to list right away.
4) When I do a ls -ln it displays right away as well pointing to the
slowdown being the mapping of the users in the db lookup.
I have the same directory with the same number of files on a Raid 5
SCSI partition on Freebsd 4.X and it only takes 2 seconds to start
displaying the list with the command ls -lh.
Any ideas why it takes so long for this on Freebsd 7.0 stable?
The partition this folder is on it /dev/da0s1f with a total size of
1.7T and a usage of 63G
Any suggestions or help on this would be greatly appreciated.
Thanks,
Paul
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