[DRBD-user] Before swap to DRBD

Thomas Baumann tom at tiri.li
Wed Oct 27 14:40:50 CEST 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


If you extend /dev/mapper/vg_foo-bar, then nothing changes, as you have to
resize the DRBD which could be done online if in connected state.
If you have LVM on top  you have to extend the PV with the pvresize command,
and after this you may resize the filesystem on top.
If you have a normal Filesystem on top, you should resize this.

Best regards,

T. Baumann

tiri GmbH
Lauenburger Str. 31a
21493 Schwarzenbek
Tel. 04151 8674995
Fax. 04151 8674996
Net. http://www.tiri.li

Geschäftsführer: Anja Baumann, Thomas Baumann Sitz Schwarzenbek, Amtsgericht
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-----Ursprüngliche Nachricht-----
Von: drbd-user-bounces at lists.linbit.com
[mailto:drbd-user-bounces at lists.linbit.com] Im Auftrag von Sam Przyswa
Gesendet: Mittwoch, 27. Oktober 2010 14:36
An: Mark Watts
Cc: drbd-user at lists.linbit.com
Betreff: Re: [DRBD-user] Before swap to DRBD

Le 27/10/2010 11:12, Mark Watts a écrit :
> Hash: SHA1
>> Thanks a lot for your reply, but what you mean by "Using an LVM 
>> volume for DRBD backing store" I'm very interested !
> For example:
> resource r0 {
>    on alice {
>      device    /dev/drbd1;
>      disk      /dev/mapper/vg_foo-bar;
>      address;
>      meta-disk internal;
>    }
>    on bob {
>      device    /dev/drbd1;
>      disk      /dev/mapper/vg_foo-bar;
>      address;
>      meta-disk internal;
>    }
> }
> Where /dev/mapper/vg_foo-bar is an LVM Logical Volume.
> This is in contrast to using /drv/drbd1 as the basis for an LVM 
> Physical Volume (ie: doing "pvcreate /dev/drbd1").

Yes, thanks !

Now I understand the difference but in this case what about if I extend the
size of the LVM logical volume "disk /dev/mapper/vg_foo_bar" ?


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