[DRBD-user] DRBD over ZFS - or the other way around?

Gionatan Danti g.danti at assyoma.it
Sat Sep 16 14:32:50 CEST 2017

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


Il 15-09-2017 17:12 David Bruzos ha scritto:
> Hi Danti,
>     The behavior you are experiencing is normal.  As I pointed out
> previously, I've been using this setup for many years and I've seen
> the same thing.  You will encounter that when the filesystem is
> written on the DRBD device without the use of a partition table.
>     As a side note, I've had some nasty stability issues with the DRBD
> version in the kernel (4.4/4.9 kernels) when running on ZFS, but DRBD
> 8.4.10 and ZFS 0.6.5.11 seem to be running great.  I also run the
> storage as part of dom0, which many admins don't recommend, but
> generally it works alright.  The stability issues were typically rare
> and happened under high I/O loads and were DRBD related deadlock type
> crashes.  Again, those problems seem to be resolve in the latest DRBD
> 8 RELEASE.
> 
> David

Hi David, thanks again for taking the time to report your findings.
I plan to use CentOS, which has no build-in DRBD support, so I will use 
ELRepo's DRBD packages + the official ZFS 0.7.x repository.

Regards.

-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
GPG public key ID: FF5F32A8



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