Thanks for sage! I'm on the flight at Oct 1. :-( Now my team is mainly worked on the performance of ceph, we have observed these points: 1. encode/decode plays remarkable latency, especially in ObjectStore::Transaction. I'm urgen in refactor ObjectStore API to avoid encode/decode codes. It seemed has be signed in note(- remove serialization from ObjectStore::Transaction (ymmv)) 2. obvious latency for threadpool/workqueue model. Do we consider to impl performance optimization workqueue to replace existing critical workqueue such as op_wq in OSD.h and op_wq in FileStore.h. Now in my AsyncMessenger impl, I will try to use custom and simple workqueue impl to improve performance. 3. Large lock in client library such as ObjectCacher On Fri, Sep 26, 2014 at 2:27 AM, Sage Weil <sweil@xxxxxxxxxx> wrote: > Hi everyone, > > A number of people have approached me about how to get more involved with > the current work on improving performance and how to better coordinate > with other interested parties. A few meetings have taken place offline > with good results but only a few interested parties were involved. > > Ideally, we'd like to move as much of this dicussion into the public > forums: ceph-devel@xxxxxxxxxxxxxxx and #ceph-devel. That isn't always > sufficient, however. I'd like to also set up a regular weekly meeting > using google hangouts or bluejeans so that all interested parties can > share progress. There are a lot of things we can do during the Hammer > cycle to improve things but it will require some coordination of effort. > > Among other things, we can discuss: > > - observed performance limitations > - high level strategies for addressing them > - proposed patch sets and their performance impact > - anything else that will move us forward > > One challenge is timezones: there are developers in the US, China, Europe, > and Israel who may want to join. As a starting point, how about next > Wednesday, 15:00 UTC? If I didn't do my tz math wrong, that's > > 8:00 (PDT, California) > 15:00 (UTC) > 18:00 (IDT, Israel) > 23:00 (CST, China) > > That is surely not the ideal time for everyone but it can hopefully be a > starting point. > > I've also created an etherpad for collecting discussion/agenda items at > > http://pad.ceph.com/p/performance_weekly > > Is there interest here? Please let everyone know if you are actively > working in this area and/or would like to join, and update the pad above > with the topics you would like to discuss. > > Thanks! > sage -- Best Regards, Wheat -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
