Hi Sam, On Mon, Oct 2, 2017 at 6:01 PM Sam Huracan <nowitzki.sa...@gmail.com> wrote:
> Anyone can help me? > > On Oct 2, 2017 17:56, "Sam Huracan" <nowitzki.sa...@gmail.com> wrote: > >> Hi, >> >> I'm reading this document: >> >> http://storageconference.us/2017/Presentations/CephObjectStore-slides.pdf >> >> I have 3 questions: >> >> 1. BlueStore writes both data (to raw block device) and metadata (to >> RockDB) simultaneously, or sequentially? >> >> 2. From my opinion, performance of BlueStore can not compare to FileStore >> using SSD Journal, because performance of raw disk is less than using >> buffer. (this is buffer purpose). How do you think? >> >> 3. Do setting Rock DB and Rock DB Wal in SSD only enhance write, read >> performance? or both? >> >> Hope your answer, >> > I am researching the same thing, but recommend you look at http://ceph.com/community/new-luminous-bluestore And also search for Bluestore cache to answer some questions. My test Luminous cluster so far is not as performant as I would like, but I have not yet put a serious effort into tuning it, amd it does seem stable. Hth, Alex >> >> _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- -- Alex Gorbachev Storcium
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