Re: Resizing underlying LVM partition after cloning to bigger disk

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, 5 Mar 2011, Scott Arthur wrote:

> I did consider that as an easier option.
> 
> Based on what is said here:
> http://tldp.org/HOWTO/LVM-HOWTO/multpartitions.html if I don't have striped
> logical volumes and there's only one physical drive, can I expect any
> performance issues?

With no striping or mirroring, there is no performance issue.
Even with striping or mirroring, you can manually designate which
PVs to use and maintain optimal performance.  At some point, there
should be some metadata for PVs (if there isn't already) to mark them
as belonging to the same physical drive.  

It would also be useful to mark PVs that reside on "0 seek time" media
like solid state drives.  (Which have limited bandwidth, so you still
don't want to stripe or mirror on the same physical drive.)  There is
less need to defragment a PV with 0 seek time, and it would be more
optimal for snapshot COW LVs to be on zero seek PVs (since the COW
blocks are mapped in essentially random order).

-- 
	      Stuart D. Gathman <stuart@bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


[Index of Archives]     [Gluster Users]     [Kernel Development]     [Linux Clusters]     [Device Mapper]     [Security]     [Bugtraq]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]

  Powered by Linux