topic percentage of mirroring in Operating System - HP-UX

percentage of mirroring

changee — Thu, 17 May 2007 20:38:03 GMT

hi,

i am mirroring an lvol. Is there any way i can find out what is the completed percentage of mirroring.Any command which shows "so much percentage is completed ".

thanks,
changee

Re: percentage of mirroring

A. Clay Stephenson — Thu, 17 May 2007 20:42:24 GMT

Not as such but you changed run lvdisplay -v and see which extents are current and which are stale.

Re: percentage of mirroring

Jov — Thu, 17 May 2007 20:44:08 GMT

Hi,

Read up on 'vgdisplay' and/or 'lvdisplay' as it should show the status of mirroing in progress. I am pretty sure its 'vgdisplay -d'.

Jov

Re: percentage of mirroring

James R. Ferguson — Thu, 17 May 2007 20:47:33 GMT

Hi:

# lvdisplay /dev/vgXX/lvolNN|grep -c stale

...will display the number of stale extents remaining.

Regards!

...JRF...

Re: percentage of mirroring

changee — Thu, 17 May 2007 20:55:31 GMT

i am already using the following command to see the number of 'stale' LE's.
lvdisplay -v /dev/vg01/lvol6 |grep -i stale|wc -l

what i was looking in particular is a way to find the percentage of mirroring.
i donnow wether something of this kind is available in hp.

Re: percentage of mirroring

Jov — Thu, 17 May 2007 21:05:24 GMT

Now some of these LVM stuff is coming back. No there is no simple command to give a mirror sync progress bar.

Jov

Re: percentage of mirroring

James R. Ferguson — Thu, 17 May 2007 21:19:28 GMT

Hi (again):

You can easily write a simple script that finds the number of logical extents for a given logical volume passed as the script's argument. Then, loop while the number of stale extents exceeds zero, calculating and printing the percentage of non-stale extents. Sleep for 15-30 seconds during each iteration.

Regards!

...JRF...

Re: percentage of mirroring

A. Clay Stephenson — Thu, 17 May 2007 21:54:53 GMT

As I said there is no such command but you have the basic ingredients in place to craft one. I rather doubt the usefullness of such a command as the lvsync takes as long as it takes (generally a few tens of minutes) and they are rare events.

Re: percentage of mirroring

changee — Thu, 17 May 2007 22:22:22 GMT

Thanks to all the experts for your valuable replies.
I wanted to c if theres any way of making life simple rather than grep' for stale LE's.

thanks once again.
changee

Re: percentage of mirroring

Nguyen Anh Tien — Sun, 20 May 2007 11:46:30 GMT

YES. There is:
Just image that your volume named /dev/vg02/lvol2

Command to check is:
#lvdisplay -v /dev/vg02/lvol2|grep stale|wc
--> to find all PE NOT COMPETED
#lvdisplay -v /dev/vg02/lvol2|wc
To count all PE on LV
HTH

Re: percentage of mirroring

changee — Wed, 23 May 2007 22:48:34 GMT

Thank You all for your valuable suggestions..

Re: percentage of mirroring

Vivek_Pendse — Wed, 30 May 2007 00:43:47 GMT

# lvdisplay -v /dev/vgxx/lvolx | grep stale | wc -l
this will show you the remaining stale extenets which is to be mirrored.
& the time to complete depends on the pe extent size.
Thanks,
Vivek