Hi
Not to sure what you are looking for but these are the type of
performance numbers we are getting on our jewel 10.2. install
We have tweaked things up a bit to get better write performance.
all writes using fio - libio for 2 minute warm and 10 minute run
6 node cluster - spinning disk with some NVMe
40 Gb network for both cluster and public
the client is a separate machine talking to the ceph public network at
40Gb
4K writes - 30,000 iops - 20 MB/s
1024k writes - 1800 iops - 1.3GB/s
depending on your workload requirements
thanks Joe
>>> Mark Nelson <mnel...@redhat.com> 11/10/2017 8:51 AM >>>
FWIW, on very fast drives you can achieve at least 1.4GB/s and 30K+
write IOPS per OSD (before replication). It's quite possible to do
better but those are recent numbers on a mostly default bluestore
configuration that I'm fairly confident to share. It takes a lot of
CPU, but it's possible.
Mark
On 11/10/2017 10:35 AM, Robert Stanford wrote:
>
> Thank you for that excellent observation. Are there any rumors /
has
> anyone had experience with faster clusters, on faster networks? I
> wonder how Ceph can get ("it depends"), of course, but I wonder
about
> numbers people have seen.
>
> On Fri, Nov 10, 2017 at 10:31 AM, Denes Dolhay <de...@denkesys.com
> <mailto:de...@denkesys.com>> wrote:
>
> So you are using a 40 / 100 gbit connection all the way to your
client?
>
> John's question is valid because 10 gbit = 1.25GB/s ...
subtract
> some ethernet, ip, tcp and protocol overhead take into account
some
> additional network factors and you are about there...
>
>
> Denes
>
>
> On 11/10/2017 05:10 PM, Robert Stanford wrote:
>>
>> The bandwidth of the network is much higher than that. The
>> bandwidth I mentioned came from "rados bench" output, under
the
>> "Bandwidth (MB/sec)" row. I see from comparing mine to others
>> online that mine is pretty good (relatively). But I'd like to
get
>> much more than that.
>>
>> Does "rados bench" show a near maximum of what a cluster can
do?
>> Or is it possible that I can tune it to get more bandwidth?
>> |
>> |
>>
>> On Fri, Nov 10, 2017 at 3:43 AM, John Spray <jsp...@redhat.com
>> <mailto:jsp...@redhat.com>> wrote:
>>
>> On Fri, Nov 10, 2017 at 4:29 AM, Robert Stanford
>> <rstanford8...@gmail.com
<mailto:rstanford8...@gmail.com>> wrote:
>> >
>> > In my cluster, rados bench shows about 1GB/s
bandwidth.
>> I've done some
>> > tuning:
>> >
>> > [osd]
>> > osd op threads = 8
>> > osd disk threads = 4
>> > osd recovery max active = 7
>> >
>> >
>> > I was hoping to get much better bandwidth. My
network can
>> handle it, and my
>> > disks are pretty fast as well. Are there any major
tunables
>> I can play with
>> > to increase what will be reported by "rados bench"?
Am I
>> pretty much stuck
>> > around the bandwidth it reported?
>>
>> Are you sure your 1GB/s isn't just the NIC bandwidth
limit of the
>> client you're running rados bench from?
>>
>> John
>>
>> >
>> > Thank you
>> >
>> > _______________________________________________
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<mailto:ceph-users@lists.ceph.com>
>> >
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>> >
>>
>>
>>
>>
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