Hello.
Out of curiosity, why do you and people in general use more replica 3
than replica 2 ?
If I understand correctly this seems overkill and waste of storage as 2
copies of data (replica 2) seems pretty reasonable similar to RAID 1
and still in the worst case the data can be replicated after a fail. I
see that replica 3 helps more on performance at the cost of space.
Fernando
On 24/04/2017 08:33, Sven Achtelik wrote:
Hi All,
my oVirt-Setup is 3 Hosts with gluster and reaplica 3. I always try to
stay on the current version and I’m applying updates/upgrade if there
are any. For this I put a host in maintenance and also use the “Stop
Gluster Service” checkbox. After it’s done updating I’ll set it back
to active and wait until the engine sees all bricks again and then
I’ll go for the next host.
This worked fine for me the last month and now that I have more and
more VMs running the changes that are written to the gluster volume
while a host is in maintenance become a lot more and it takes pretty
long for the healing to complete. What I don’t understand is that I
don’t really see a lot of network usage in the GUI during that time
and it feels quiet slow. The Network for the gluster is a 10G and I’m
quiet happy with the performance of it, it’s just the healing that
takes long. I noticed that because I couldn’t update the third host
because of unsynced gluster volumes.
Is there any limiting variable that slows down traffic during healing
that needs to be configured ? Or should I maybe change my updating
process somehow to avoid having so many changes in queue?
Thank you,
Sven
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