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тАО02-15-2001 01:41 AM
тАО02-15-2001 01:41 AM
We have AutoRaid disk massive. Everything works good. But if we copying large amount of data (several hundreds Mb), we getting 'hang' for several seconds. It seems, like it is 'software hang', because Autoraid looks like 'working at normal condition'. Also, this problem occurs with Oracle working with massive data.
How we can eliminate this problem?
How we can eliminate this problem?
Solved! Go to Solution.
2 REPLIES 2
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тАО02-15-2001 11:52 AM
тАО02-15-2001 11:52 AM
Re: AutoRaid hangs for 10-30 seconds, then restores
One thing I would do is call HP and make sure that your 12H has the latest version of the firmware installed. I'm not saying it is definitely a firmware issue, but it could be.
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тАО02-23-2001 07:37 AM
тАО02-23-2001 07:37 AM
Solution
Run arraydsp -i
get the serial number of the autoraid
arraydsp -a
send it to me (wmcn@ireland.com)
make sure that lvm (strings /etc/lvmtab)
is configured well for your VG/LV
ie striped lv across both controllers.
The autoraid can get messed up when detecting
large synchronous writes. It thinks writing into
RAID 5 is better. This is why it's slow.
You can fix your problem temporarily by
creating a big lun and then deleting it (true ha!)
Or: setting the write working set to a low level.
Search for Autoraid understanding the write working
set from hp.com you'll get it eventually.
If you send me the arraydsp -a I'll give you the
command line!
Also for completeness,
logprint > /tmp/text
and send that too
Later,
Bill
get the serial number of the autoraid
arraydsp -a
send it to me (wmcn@ireland.com)
make sure that lvm (strings /etc/lvmtab)
is configured well for your VG/LV
ie striped lv across both controllers.
The autoraid can get messed up when detecting
large synchronous writes. It thinks writing into
RAID 5 is better. This is why it's slow.
You can fix your problem temporarily by
creating a big lun and then deleting it (true ha!)
Or: setting the write working set to a low level.
Search for Autoraid understanding the write working
set from hp.com you'll get it eventually.
If you send me the arraydsp -a I'll give you the
command line!
Also for completeness,
logprint
and send that too
Later,
Bill
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