On 8/31/2012 7:11 AM, Xiaopong Tran wrote:
Hi, Ceph storage on each disk in the cluster is very unbalanced. On each node, the data seems to go to one or two disks, while other disks are almost empty. I can't find anything wrong from the crush map, it's just the default for now. Attached is the crush map.
Have you been reweight-ing osds? I went round and round with my cluster a few days ago reloading different crush maps only to find that it re-injecting a crush map didn't seem to overwrite reweights.
Take a look at `ceph osd tree` to see if the reweight column matches the weight column.
Note: I'm new at this. This is my experience only, with 0.48.1, and may not be entirely correct.
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