- Original Message -
From: "Maor Lipchuk"
To: "rkoch"
Cc: "users" , "Nir Soffer"
Sent: Sunday, September 16, 2018 11:27:44 AM
Subject: Re: [ovirt-users] LVM Mirroring
> On Thu, Sep 13, 2018 at 9:59 PM, René Koch < [ mailto:rk...@rk-it.at |
> rk...@rk-it.at ] > wrote:
> Hi list,
> Is it possible to use LVM mirroring for FC LUNs in oVirt 4.2?
> BQ_BEGIN
> I've 2 FC storages which do not have a replication functionality. So the idea
> is to create a LVM mirror using
> 1 LUN of storage 1 und 1 LUN of storage 2 for replicating data between the
> storages on host level (full RHEL
> 7.5 notoVirt Node). With e.g. pacemaker and plain KVM this works fine. Is it
> possible to have the same setup
> with oVirt 4.2?
> BQ_END
> (Adding Nir)
> Are you asking that in relation to support disaster recovery for oVirt setup?
> I'm not sure if it will help you with what you are lookiong for, but have you
> tried to look into Gluster Geo replication:
> [ https://docs.gluster.org/en/v3/Administrator%20Guide/Geo%20Replication/ |
> https://docs.gluster.org/en/v3/Administrator%20Guide/Geo%20Replication/ ]
Thanks a lot for your answer.
It's more HA then disaster recovery. If 1 storage is down, it should be
possible to use the second one without a downtime.
So Geo repolication of Gluster isn't really what we are looking for. The
storages are also located in 2 different buildings with redundant network and
FC connections and low latency.
According to your answer I guess LVM mirroring isn't possible, right?
Do you think using the FC LUNs as Gluster bricks could be a reasonable solution?
We have 2 storages with multiple LUNs, 4 oVirt hosts and 2 atm non used hosts,
so a distributed replicated volume with arbiter or replicated with arbiter
could also be possible to replicated the 2 storages, I think.
But I'm concerned about performance, as I don't have good experience with
Gluster on VMware when using 1 VMDK (hosted on a NetApp storage with 10K SAS
disks), but good experience with Gluster when using 12 (or 24) local SATA disks
in a host. So I fear that 1 LUN from a storage (ZFS storage with a pool of many
disks) is not as good as 12 local disks in a storage.
> BQ_BEGIN
> Thanks a lot.
> Regards,
> René
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