[DRBD-user] primary/primary with ext2 not updating real-time

George H george.dma at gmail.com
Sun Feb 24 21:11:42 CET 2008

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


On Sun, Feb 24, 2008 at 9:33 PM, Theophanis Kontogiannis
<theophanis_kontogiannis at yahoo.gr> wrote:
>
> Hello all,
>
> I have looked through Google and list archives, however I did not find a
> detailed post on the following:
>
> I have two replica servers (hardware, OS, main config. Obviously the IPs are
> different)
>
> Centos5
>
> Drbd 8
>
>
> I want:
>
> 1.      To have the partitions I will use for storage, be live replicated to
> both servers (This is completed. I use drbd on each partition on server 1
> and share it via drbd to server 2. The filter statement on /etc/drbd.conf is
> corect).
>
> 2.      To use /dev/drbd0 and /dev/drbd1 as members of vg0 (Completed. VG0
> is created to the full extend of the partitions)
>
> 3.      To mount at the same time the same vg to both servers (Completed
> only manually. "primary/primary" configuration and "vgchange –a y vg0" on
> both servers and then "mnt /dev/vg0/vg0 /mnt")
>
> 4.      Then when I write file "ABC" on server 1, I need server 2 to realize
> (with "ls") that file "ABC" is being written (or at least was written)
> WITHOUT having to un-mount and mount again.
>
>
>
> Anyone solved this (even with clvmd and gfs)?
>
> If yes I would really appreciate some detailed explanations how it is
> solved.
>
> Sincerely,
>
> Theophanis Kontogiannis
>

I think it has been recommended many many many times to ONLY use a
clustered filesystem when doing a primary/primary setup with DRBD. So
using ext2 in primary/primary will just corrupt your data.



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