* [linux-lvm] How big can an LVM mirror log get?
@ 2013-04-21 19:37 Ben
2013-04-25 15:26 ` Brassow Jonathan
0 siblings, 1 reply; 2+ messages in thread
From: Ben @ 2013-04-21 19:37 UTC (permalink / raw)
To: linux-lvm
In my testing of LVM2 I have seen a mirror log up to 512KiB. Does anyone know,
outside of pathlogical use cases, what the largest mirror log that would be
created using the default region size?
Thank you.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [linux-lvm] How big can an LVM mirror log get?
2013-04-21 19:37 [linux-lvm] How big can an LVM mirror log get? Ben
@ 2013-04-25 15:26 ` Brassow Jonathan
0 siblings, 0 replies; 2+ messages in thread
From: Brassow Jonathan @ 2013-04-25 15:26 UTC (permalink / raw)
To: LVM general discussion and development
LV_size / region_size = region_cnt
region_cnt / 8 ~= number of bytes necessary for the log
So,
100GiB LV / 512kiB region size = 200,000 regions
200000 / 8 = ~25kiB log
It takes quite a bit to get the log to be large and if that happens and you don't like it, you can always increase the region size.
brassow
On Apr 21, 2013, at 2:37 PM, Ben wrote:
> In my testing of LVM2 I have seen a mirror log up to 512KiB. Does anyone know,
> outside of pathlogical use cases, what the largest mirror log that would be
> created using the default region size?
>
> Thank you.
>
> _______________________________________________
> 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/
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-04-21 19:37 [linux-lvm] How big can an LVM mirror log get? Ben
2013-04-25 15:26 ` Brassow Jonathan
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