[DRBD-user] (no subject)

Pascal BERTON pascal.berton3 at free.fr
Wed Jan 25 14:24:38 CET 2012


Oren,

 

AFAIK, DRBD doesn’t support snapshotting natively. Therefore, if I’m
correct, you only have 2 ways to achieve what you intend to do :

-          Setup an VG/LV structure on top of your DRBD resource and make
use of the LVM snapshot facility. Beware, I’ve read many articles mentioning
that write performances were dropping down severely in that case. Don’t know
if it’s still the case
 Google a bit to check that point.

-          Use snapshot features of your storage array, providing it is able
to do so


 

Best regards,

 

Pascal.

 

De : drbd-user-bounces at lists.linbit.com
[mailto:drbd-user-bounces at lists.linbit.com] De la part de Oren Nechushtan
Envoyé : mercredi 25 janvier 2012 14:18
À : DRBD User Forum
Objet : [DRBD-user] (no subject)

 

Hi,
Is there a built in way to keep snapshots?
Namely, on each (e.g., of the two) nodes
 Allocate space in advance 
 Configure DRBD to 
 /dev/drbd0
  /dev/sda1 - active partition
  /dev/sda0 - dedicated for keeping one snapshot
 
Take snapshot should be fast - much faster than dd
Allow Reverting to the snapshot 
 
Also, are there other means to achieve this, apart from buying storage?
 
Thanks in advance,
Oren

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