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3 posts tagged with "bluestore"

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· 11 min read
Mark Nelson

Hello Ceph community! It's that time again for another blog post! Recently, a user on the ceph subreddit asked whether Ceph could deliver 10K IOPs in a combined random read/write FIO workload from one client. The setup consists of 6 nodes with 2 4GB FireCuda NVMe drives each. They wanted to know if anyone would mind benchmarking a similar setup and report the results. Here at Clyso we are actively working on improving the Ceph code to achieve higher performance. We have our own tests and configurations for evaluating our changes to the code, but it just so happens that one of the places we do our work (the upstream ceph community performance lab!) appears to be a good match for testing this user's request. We decided to sit down for a couple of hours and give it a try. u/DividedbyPi, one of our friends over at 45drives.com, wrote that they are also going to give it a shot and report the results on their youtube channel in the coming weeks. We figure this could be a fun way to get results from multiple vendors. Let's see what happens!

· One min read
Joachim Kraftmayer

After more than 4 years of development, mclock is the default scheduler for ceph quincy (version 17).If you don't want to use the scheduler, you can disable it with the option osd_op_queue.

WPQ was the default before Ceph Quincy and the change requires a restart of the OSDs.

Source:

https://docs.ceph.com/en/quincy/rados/configuration/osd-config-ref/#confval-osd_op_queue"

https://docs.ceph.com/en/quincy/rados/configuration/osd-config-ref/#qos-based-on-mclock>"