Hi Sam,
On Mon, Oct 2, 2017 at 6:01 PM Sam Huracan <nowitzki.sammy@xxxxxxxxx> wrote:
Anyone can help me?On Oct 2, 2017 17:56, "Sam Huracan" <nowitzki.sammy@xxxxxxxxx> wrote:Hi,I'm reading this document: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
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Alex Gorbachev
Storcium
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