There isn't currently any way to directly move a container DB from one drive to
another. As you said, the placement is based on the hash of the container name,
so you can't change that.
One thing you can do is lower the weight of the drive that is very busy. This
will cause less partitions to be placed there and lower the overall load on
that particular drive. This is not a panacea though. The load will simply move
to other hardware in the cluster. If you're lucky, then you'll have the larger
container DB on a less busy drive.
I'd strongly recommend that you deploy flash storage for accounts and
containers. This will help alleviate these sorts of problems, and it's
generally the cheapest way for an operator to resolve these sorts of problems.
If it's possible, you should see if you can get the end-user to use many
containers instead of one container. Spreading the load around the system to
more containers is a best-practice for using Swift.
Longer-term, we're talking about how to scale container resources in Swift.
This week at the Swift midcycle hackathon, we talked about some ideas on how to
transparently shard the container DBs. However, implementing it is a large
amount of work that will take a while to complete.
I hope these suggestions help.
--John
On Aug 11, 2015, at 4:38 PM, Senthil senthi...@gmail.com wrote:
Hi,
Are you currently using same disks/nodes for container and object storage ?
http://docs.openstack.org/openstack-ops/content/maintenance.html
talks about replacing storage nodes. The same instructions applies to
container db as well.You need to apply the changes to container ring and push
it out. You will be able to move container db to different server or
relocate container db to different disk
Hope it helps
Senthil
On Tue, Aug 11, 2015 at 2:39 PM, Jinkyung Hwang jinkyung.hw...@kt.com wrote:
Hello,
Is there any method to move A container DB to another container server of
different physical disk of original one ?
I have a very large container (having 70 million objects).
This container IO makes other customer's container read/write operation very
slow, so I'd like to move it to another location that is more idle.
BUT Swift URL is made with MD5 Hash and it cannot be modifiable.
How can I move the container DB ? Or is there any method to use something
like 'link' ?
It would be appreciated if you share any ideas.
Thank you
Jinkyung Hwang
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