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Okay, just tried it in 3.9 Even though
attaching a non arbiter volume (say a replica-2 ) as hot-tier is
succeeding at the CLI level, the brick volfiles seem to be
generated incorrectly (I see that the arbiter translator is
getting loaded in one of the replica-2 bricks too, which is
incorrect). I'd recommend not to use arbiter for tiering
irrespective of hot or cold tier.
On 05/05/2017 09:42 PM, Walter Deignan wrote:
Did that change between
3.9 and 3.10? When I
originally saw some references on the Redhat storage packaged
solution
about a possible incompatibility I assumed it just meant that
the hot tier
itself couldn't be an arbiter volume.
I was tripped up by the change in
apparent
support for the cold tier between 3.9 and 3.10. But maybe that
was just
a fixed oversight which never should have worked in the first
place?
-Walter Deignan
-Uline IT, Systems Architect
From:
Ravishankar N
<ravishankar@xxxxxxxxxx>
To:
Walter Deignan
<WDeignan@xxxxxxxxx>,
gluster-users@xxxxxxxxxxx
Date:
05/05/2017 11:08 AM
Subject:
Re:
Arbiter and Hot Tier
Hi Walter,
Yes, arbiter volumes are currently not supported with tiering.
-Ravi
On 05/05/2017 08:54 PM, Walter Deignan wrote:
I've been googling this to no avail so
apologies
if this is explained somewhere I missed.
Is there a known incompatibility between using arbiters and hot
tiering?
Experience on 3.9
Original volume - replica 3 arbiter 1
Attach replica 2 arbiter 1 hot tier - failure
Attach replica 3 hot tier - success
Experience on 3.10
Original volume - replica 3 arbiter 1
Attach replica 2 arbiter 1 hot tier - failure
Attach replica 3 hot tier - failure
Attach hot tier without specifying replica - success but comes
in as a
distributed tier which I would assume totally negates the point
of having
a replicated cold tier?
The specific error message I get is "volume attach-tier: failed:
Increasing
replica count for arbiter volumes is not supported."
-Walter Deignan
-Uline IT, Systems Architect
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