Hi Benjamin,
Can you tell us more about your work-load like the file size, size of both hot and cold storage, how the files are created (after attaching the tier or before attaching the tier) , how long have you been using the tier volume, etc. Regards Rafi KC On 09/03/2016 09:16 AM, Benjamin Kingston wrote: > Hello all, > > I've discovered an issue in my lab that went unnoticed until recently, > or just came about with the latest Centos release. > > When the SSD hot tier is enabled read from the volume is 2MB/s, after > detaching AND committing, read of the same file is at 150MB/s to /dev/null > > If I copy the file to the hot bricks directly the write is 150MB/s and > read is 500MB/s on the first read, and then 4GB/s on the subsequent > reads (filesystem RAM caching) to /dev/null > > Just enabling tier storage takes the performance to ~10-20IOPS and > 2-10MB/s even for local node mounted volume. > > I don't see any major log issues and I detached and did a fix-layout, > but it persists when re-enabling the tier. > > > > > _______________________________________________ > Gluster-users mailing list > [email protected] > http://www.gluster.org/mailman/listinfo/gluster-users
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