<div dir="ltr"><div><div><div><div>Hi,<br><br></div>I have a small (5 node) compute cluster running an MPI job that needs to read from a few 20 GB files. These files are stored in a gluster volume composed of bricks from four storage nodes. I originally made the volume with a replica count of 2, but in an attempt to improve read performance, I recreated it with a replica count of 4.<br>
<br></div>However, reading turned out to be even slower! I checked out disk access with iotop, and for one file, only two of the bricks are being read from. For another file, only _one_ brick is accessed! Volume top read also shows the same thing.<br>
<br></div>What might be the problem? There are 40 threads across the cluster trying to read at the same time; shouldn't this be automatically load balanced across each brick?<br><br></div><div>Thanks,<br></div>Ray<br>
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