Top shows the CPUs pegged at ~100%. Writes are done by a tool built in-house which is similar in functionality to other object store benchmarking tools. As I mentioned, there are 256 parallel object writes (PUTS), each of 256K bytes.
On Thu, Apr 2, 2015 at 9:21 PM, Yogesh Girikumar <[email protected]> wrote: > Also how are you doing the object writes to benchmark it? Are you using dd? > > On 3 April 2015 at 09:50, Yogesh Girikumar <[email protected]> wrote: >> >> What does top say? >> >> On 3 April 2015 at 02:34, Shrinand Javadekar <[email protected]> >> wrote: >>> >>> Hi, >>> >>> I have a single node Swift instance. It has 16 cpus, 8 disks and 64GB >>> memory. As part of testing, I am doing 256 object writes in parallel >>> for ~10 mins. Each object is also 256K bytes in size. >>> >>> While my experiment is running, I see that the CPU utilization of the >>> box is always ~100%. I am trying to understand what is causing this >>> high CPU utilization. Some of this could be attributed to: >>> >>> 1. MD5 checksum calculation done to verify every PUT. >>> 2. MD5 checksum calculation by the auditor (if it runs during this >>> interval). >>> 3. Hash calculation of the path to decide which partition the object goes >>> to. >>> >>> Are there any other CPU intensive operations happening on the system >>> that I should be aware of? >>> >>> I see that the proxy-server has a "PUT" queue. Is there some >>> processing of the data in this queue? Would simply putting data in and >>> out of the queue, streaming the data between the proxy and object >>> server use considerable CPU? >>> >>> Thanks in advance. >>> -Shri >>> >>> _______________________________________________ >>> Mailing list: >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >>> Post to : [email protected] >>> Unsubscribe : >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> >> > _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
