[Openstack] Regarding replicator behavior with single replica
Zhou, Yuan
yuan.zhou at intel.com
Fri Sep 13 02:06:37 UTC 2013
Not that I know of..
The object location(including handoff) is provided by swift-get-nodes:
$ swift-get-nodes -a /etc/swift/object.ring.gz a c o
Did you observed which object is moving and its moving path? was it moving from handoff to primary?
BR,
-Yuan
-----Original Message-----
From: Vengurlekar, Tushar V (USD-SWD) [mailto:tushar.vengurlekar at hp.com]
Sent: Friday, September 13, 2013 1:02 AM
To: Zhou, Yuan; openstack at lists.openstack.org
Subject: RE: Regarding replicator behavior with single replica
Hi Yuan,
All my devices are up. Will replicator try to move object even though I have single replica?
Thanks,
Tushar
-----Original Message-----
From: Zhou, Yuan [mailto:yuan.zhou at intel.com]
Sent: Thursday, September 12, 2013 8:54 AM
To: Vengurlekar, Tushar V (USD-SWD); openstack at lists.openstack.org
Subject: RE: Regarding replicator behavior with single replica
Hi Tushar,
One possible reason is that one of your devices is unavailable when you're uploading ?
This makes some of objects are uploaded to handoff devices actually and obj-replicator will try to move them back to primary devices.
Regards,
-Yuan
-----Original Message-----
From: Vengurlekar, Tushar V (USD-SWD) [mailto:tushar.vengurlekar at hp.com]
Sent: Wednesday, September 11, 2013 8:02 PM
To: openstack at lists.openstack.org
Subject: [Openstack] Regarding replicator behavior with single replica
Hello everyone,
I was trying a Swift setup having single replica configured with 4 devices added to the ring with different IP addresses.
Later (after all replication/rebalance completed) I uploaded many objects in a multiple containers.
I observe the data movement across these devices through rsync replicator daemon.
I understand that the object rebalance (using rsync) should happen only when we add devices or change weight value in ring (and if multiple replicas configured).
So what is a reason that it performs data movement (of newly uploaded objects) without any ring changes and single replica?
Thanks in advance,
Tushar
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