Surprisingly, a google search didnt seem to find the answer on this, so guess I 
should ask here:

what determines if an rdb is "100% busy"?

I have some backend OSDs, and an iSCSI gateway, serving out some RBDs.

iostat on the gateway says rbd is 100% utilized

iostat on individual OSds only goes as high as about 60% on a per-device basis.
CPU is idle.
Doesnt seem like network interface is capped either.

So.. how do I improve RBD throughput?



--
Philip Brown| Sr. Linux System Administrator | Medata, Inc. 
5 Peters Canyon Rd Suite 250 
Irvine CA 92606 
Office 714.918.1310| Fax 714.918.1325 
pbr...@medata.com| www.medata.com
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