Hi Somnath,
Sure. It's very easy:
1) install or build wip-newstore
2) Add the following to your ceph.conf file:
enable experimental unrecoverable data corrupting features = newstore
rocksdb
osd objectstore = newstore
Lots of interesting things to dig into!
Mark
On 04/07/2015 08:48 PM, Somnath Roy wrote:
Mark,
Could you please send the instruction out on how to use this new store?
Thanks & Regards
Somnath
-----Original Message-----
From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Mark Nelson
Sent: Tuesday, April 07, 2015 6:46 PM
To: ceph-devel
Subject: Re: Initial newstore vs filestore results
On 04/07/2015 02:16 PM, Mark Nelson wrote:
On 04/07/2015 09:57 AM, Mark Nelson wrote:
Hi Guys,
I ran some quick tests on Sage's newstore branch. So far given that
this is a prototype, things are looking pretty good imho. The 4MB
object rados bench read/write and small read performance looks
especially good. Keep in mind that this is not using the SSD
journals in any way, so 640MB/s sequential writes is actually really
good compared to filestore without SSD journals.
small write performance appears to be fairly bad, especially in the
RBD case where it's small writes to larger objects. I'm going to sit
down and see if I can figure out what's going on. It's bad enough
that I suspect there's just something odd going on.
Mark
Seekwatcher/blktrace graphs of a 4 OSD cluster using newstore for
those
interested:
http://nhm.ceph.com/newstore/
Interestingly small object write/read performance with 4 OSDs was
about
1/3-1/4 the speed of the same cluster with 36 OSDs.
Note: Thanks Dan for fixing the directory column width!
Mark
New fio/librbd results using Sage's latest code that attempts to keep small overwrite extents in the db. This is 4 OSD so not directly comparable to the 36 OSD tests above, but does include seekwatcher graphs. Results in MB/s:
write read randw randr
4MB 57.9 319.6 55.2 285.9
128KB 2.5 230.6 2.4 125.4
4KB 0.46 55.65 1.11 3.56
Seekwatcher graphs:
http://nhm.ceph.com/newstore/20150407/
Mark
--
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
________________________________
PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies).
--
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
