Ah! Right, I guess my actual question was:
How does osd crush chooseleaf type = 0 and 1 alter the crushmap?
By experimentation I've figured out that:
"osd crush chooseleaf type = 0" turns into "step choose firstn 0 type
osd" and
"osd crush chooseleaf type = 1" turns into "step chooseleaf firstn 0
type host".
Changing the crushmap in this way worked perfectly for me, ceph -s
complained while doing the rebalancing, but eventually became happy with
the result.
On 02/02/18 17:07, Gregory Farnum wrote:
Once you've created a crush map you need to edit it directly (either
by dumping it from the cluster, editing with the crush tool, and
importing; or via the ceph cli commands), rather than by updating
config settings. I believe doing so is explained in the ceph docs.
On Fri, Feb 2, 2018 at 4:47 AM Flemming Frandsen
<flemming.frand...@stibosystems.com
<mailto:flemming.frand...@stibosystems.com>> wrote:
Hi, I'm just starting to play around with Ceph, so please excuse my
complete lack of a clue if this question is covered somewhere, but I
have been unable to find an answer.
I have a single machine running Ceph which was set up with osd crush
chooseleaf type = 0 in /etc/ceph/ceph.conf, now I've added a new
machine
with some new OSDs, so I'd like to change to osd crush chooseleaf
type =
1 and have Ceph re-balance the replicas.
How do I do that?
Preferably I'd like to make the change without making the cluster
unavailable.
So far I've edited the config file and tried restarting daemons,
including rebooting the entire OS, but I still see PGs that live
only on
one host.
I've read the config docuemntation page but it doesn't mention what to
do to make that specific config change take effect:
http://docs.ceph.com/docs/master/rados/configuration/ceph-conf/
I've barked up the crushmap tree a bit, but I did not see how "osd
crush
chooseleaf type" relates to that in any way.
--
Regards Flemming Frandsen - Stibo Systems - DK - STEP Release
Manager
Please use rele...@stibo.com <mailto:rele...@stibo.com> for all
Release Management requests
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Please use rele...@stibo.com for all Release Management requests
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