Monitoring LVM mirror

[Scott McMullen]

New to hp-ux. We have and hp9000 use lVM and mirroring and i was wonder how to monitor the status of the mirrored volumes.

[Craig Rants]

There is an ITO plug in which will give you graphical monitoring capabilites of LVM stuff. I don't know what you specifically want to monitor. If you want to script everything use the lvdisplay -v and find the info you want to use...
GL,
C

[Steven Sim Kok Leong]

Hi,

Check for stale extents in lvdisplay or pvdisplay.

Hope this helps. Regards.

Steven Sim Kok Leong

[Ian Dennison_1]

What we used to do in the olden days was perform an 'lvdisplay -v /dev/vg01/lvol1|grep stale |wc -l', then produce a warning if the counter was 1 or more.

These days, I imagine dmesg + syslog.log are adequate enough.

Cheers, Ian Dennison

[Uday_S_Ankolekar · Accepted solution]

Hi,

Easy way is to run lvdisplay -v /dev/vgname/lvolname

This will display status of both primary and mirrored disk. And you want to see is 'current' on both
Goodluck.

-USA..

[Helen French]

Hi,

Check this complete guide. Read "Mirroring Data using LVM" for more information:

http://www.docs.hp.com/hpux/onlinedocs/B2355-90672/B2355-90672.html

HTH,
Shiju

[Krishna Prasad]

lvdisplay -v /dev/vg##/lvol | grep stale > /dev/null

if [ $? = 0 ]
then
echo "Stale extent for lvol."
fi

You could easily write a script that would loop to check each logical volume in every volume group on our you systems and report to what every you needed.

[melvyn burnard]

you may want to look at using EMS monitoring to do this.
Go look at the EMS manuals at:
http://docs.hp.com

[fg_1]

Scott

Use the commands:

vgdisplay -v /dev/vg*

-Check the status of each lvol and look to see if it says available/syncd or available/stale.

lvdisplay -v /dev/vg##/lvol##

Check for stale extents

Gl

[Darrell Allen]

Hi Scott,

I've attached a quickie script that may help. If a lv is not synced a message will be returned else "no news is good news".

Darrell

[James R. Ferguson]

Hi Scott:

If you want to build something yourself, then here's the guts of a script to collect all the logical volume names that represent mirrored logical volumes but do not show all *current* extents. If the returned list is not empty you could email a message to yourself. This kind of script can be cron'ed and executed every n-minutes.

You can capture its output, if any, with:

LV=`$HOME/mirrors.sh`

Regards!

...JRF...