Excellent news Matt! Is it worth creating a tracker ticket or would
that be redundant at this point?
Mark
On 08/28/2018 11:37 AM, Matt Benjamin wrote:
That has come up before. We have a downstream change to disable that,
and it's being upstreamed.
Matt
On Tue, Aug 28, 2018 at 12:29 PM, Mark Nelson <mark.a.nelson@xxxxxxxxx> wrote:
Hi Mark,
Thanks for testing this! Is there any chance I could get you to create a
tracker ticket and upload your data here?
https://tracker.ceph.com/projects/rgw
I doubt very many people have run performance tests on sub-4k byte objects.
In bluestore at least, you'll also get hit by the min-alloc size which means
pretty significant write and space amplification. Out of curiosity, do you
know of many folks or applications that write out swift/S3 objects this
small?
Mark
On 08/28/2018 08:16 AM, Mark Seger wrote:
I tried to include some data and the mail was rejected because of a
suspected virus ;(
Anyhow, running getput to talk to RGW via the swift API with varying
object sizes I discovered GETs of objects with sizes less than 1448 bytes
were taking 40msec longer which exactly corresponds to the delay the nagel
alorgithm inserts under certain buffer alignment conditiions. I found this
exact same problem with swift a number of years ago.
The curious thing is I see in
http://docs.ceph.com/docs/master/rados/configuration/network-config-ref/?highlight=public%20addr#tcp
it says nagel IS disabled in rados but maybe not RGW?
-mark
