On Sat, 24 May 2014, Todd Pfaff wrote:
I have a gluster distributed volume that has been running nicely with
gluster-3.2.7 for the past two years and I now want to upgrade this to
gluster-3.5.0.
What is the recommended procedure for such an upgrade? Is it necessary to
upgrade from 3.2.7 to 3.3 to 3.4 to 3.5, or can I safely transition from
3.2.7 directly to 3.5.0?
nobody responded so i decided to wing it and hope for the best.
i also decided to go directly from 3.2.7 to 3.4.3 and not bother with
3.5 yet.
the volume is distributed across 13 bricks. formerly these were in 13
nodes, 1 brick per node, but i recently lost one of these nodes.
i've moved the brick from the dead node to be a second brick in one of
the remaining 12 nodes. i currently have this state:
gluster volume status
Status of volume: scratch
Gluster process Port Online Pid
------------------------------------------------------------------------------
Brick 172.16.1.1:/1/scratch 49152 Y 6452
Brick 172.16.1.2:/1/scratch 49152 Y 10783
Brick 172.16.1.3:/1/scratch 49152 Y 10164
Brick 172.16.1.4:/1/scratch 49152 Y 10465
Brick 172.16.1.5:/1/scratch 49152 Y 10186
Brick 172.16.1.6:/1/scratch 49152 Y 10388
Brick 172.16.1.7:/1/scratch 49152 Y 10386
Brick 172.16.1.8:/1/scratch 49152 Y 10215
Brick 172.16.1.9:/1/scratch 49152 Y 11059
Brick 172.16.1.10:/1/scratch 49152 Y 9238
Brick 172.16.1.11:/1/scratch 49152 Y 9466
Brick 172.16.1.12:/1/scratch 49152 Y 10777
Brick 172.16.1.1:/2/scratch 49153 Y 6461
what i want to do next is remove Brick 172.16.1.1:/2/scratch and have
all files it contains redistributed across the other 12 bricks.
what's the correct procedure for this? is it as simple as:
gluster volume remove-brick scratch 172.16.1.1:/2/scratch start
and then wait for all files to be moved off that brick? or do i also
have to do:
gluster volume remove-brick scratch 172.16.1.1:/2/scratch commit
and then wait for all files to be moved off that brick? or do i also
have to do something else, such as a rebalance, to cause the files to
be moved?
how do i know when everything has been moved safely to other bricks and
the then-empty brick is no longer involved in the cluster?
thanks,
tp
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