[linux-lvm] Any way to speed up activation of volumes with snapshots?

Chris Friesen chris.friesen at windriver.com
Tue Sep 15 16:54:41 UTC 2015

On 09/15/2015 02:41 AM, Zdenek Kabelac wrote:

> If you don't mind dropping existing snapshot and creating new 'old-snapshot' -
> using larger block size (i.e.  32K  (or even more) instead of 4K) may improve
> speed of disk reading noticeable (at the price of copying larger chunks when
> modifying disk blocks - depends on use-case)....

Okay, good info to have.

> And if you don't mind replacing your ancient kernel and trying some newer one -
> there have been some 'read' order improvement for this old-snapshot target made
> as well - so you may at least try if there will be any noticeable change
> (actually would be interesting just to get report how much faster it boots when
> you only exchange kernel for a boot - you don't have to use it - just measure
> boot speed)

This is essentially a custom distro, so changing just the kernel is a bit 
complicated.  However, I have a newer version that I want to test with which has 
a newer kernel but the same version of LVM, so that should give some good data.


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