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тАО12-04-2010 07:50 PM
тАО12-04-2010 07:50 PM
We intended to use pvmove initially, but instead would prefer to use LVM Mirroring. The new DMX lun sizes will be much larger than the ones we're using now on the old DMX.
We currently have luns setup so they are are dedicated to an lvol/filesystem and not spanning multiple filesystems in a given VG.
Question: If we have a lvol with say 3 luns in it at 100GB each, can we mirror that to a new lun that is at a size of 300GB?
Will LVM complain about this or is the minimum requirement that the target lun you're mirroring to has to be equal or larger than the source as far as PE's go?
If someone could confirm this for us we would really appreciate it.
Thanks
/KPS
Solved! Go to Solution.
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тАО12-04-2010 08:17 PM
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тАО12-05-2010 04:19 AM
тАО12-05-2010 04:19 AM
Re: Migrating old storage to new storae
LVM mirroring occurs at the logical volume level. The underlying LUN size doesn't matter as long as there are enough logical extents to complete the mirror.
> Shibin: I assume that you are not using any PVG-strict/distributed policy in your lvol.
You can use 'lvchange' to turn off the distributed allocation policy if you currently have that policy in force. The 'lvchange' can also set a simple strict allocation instead of a PVG one if necessary. See the manpages for more information.
Regards!
...JRF...
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тАО12-05-2010 06:38 AM
тАО12-05-2010 06:38 AM
Re: Migrating old storage to new storae
Thanks again PTA assigned......
KPS
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тАО12-06-2010 12:55 PM
тАО12-06-2010 12:55 PM