Hello,
On Fri, 1 May 2015 15:45:41 +0200 Piotr Wachowicz wrote:
> > yes SSD-Journal helps a lot (if you use the right SSDs)
> >
>
> What SSDs to avoid for journaling from your experience? Why?
>
Read the rather countless SSD threads on this ML, use the archive and your
google foo.
Like the _cu
> yes SSD-Journal helps a lot (if you use the right SSDs)
>
What SSDs to avoid for journaling from your experience? Why?
>
> > We're seeing very disappointing Ceph performance. We have 10GigE
> > interconnect (as a shared public/internal network).
> Which kind of CPU do you use for the OSD-hosts?
Hi,
On 01.05.2015 10:30, Piotr Wachowicz wrote:
> Is there any way to confirm (beforehand) that using SSDs for journals
> will help?
yes SSD-Journal helps a lot (if you use the right SSDs) for write speed,
and I made the experiences that this also helped (but not too much) for
read-performance.
>
2015 10:14
> *To:* Nick Fisk
> *Cc:* ceph-users@lists.ceph.com
> *Subject:* Re: [ceph-users] How to estimate whether putting a journal on
> SSD will help with performance?
>
>
>
> Thanks for your answer, Nick.
>
>
>
> Typically it's a single rsync
ld be okay for the PoC.
Andrei
- Original Message -
From: "Nick Fisk"
To: "Piotr Wachowicz"
Cc: ceph-users@lists.ceph.com
Sent: Friday, 1 May, 2015 10:42:12 AM
Subject: Re: [ceph-users] How to estimate whether putting a journal on SSD will
help with performance?
icz
Sent: 01 May 2015 09:31
To: ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com>
Subject: [ceph-users] How to estimate whether putting a journal on SSD will
help with performance?
Is there any way to confirm (beforehand) that using SSDs for journals will
help?
We're seeing
SSD journals will help your write latency, probably going down from around
> 15-30ms to under 5ms
>
>
>
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com
> <mailto:ceph-users-boun...@lists.ceph.com>] On Behalf Of Piotr Wachowicz
> Sent: 01 May 2015 09:31
> To
period.
>
>
>
> SSD journals will help your write latency, probably going down from around
> 15-30ms to under 5ms
>
>
>
> *From:* ceph-users [mailto:ceph-users-boun...@lists.ceph.com] *On Behalf
> Of *Piotr Wachowicz
> *Sent:* 01 May 2015 09:31
> *To:* ceph-u
May 2015 09:31
To: ceph-users@lists.ceph.com
Subject: [ceph-users] How to estimate whether putting a journal on SSD will
help with performance?
Is there any way to confirm (beforehand) that using SSDs for journals will
help?
We're seeing very disappointing Ceph performance. We have 10Gig
Is there any way to confirm (beforehand) that using SSDs for journals will
help?
We're seeing very disappointing Ceph performance. We have 10GigE
interconnect (as a shared public/internal network).
We're wondering whether it makes sense to buy SSDs and put journals on
them. But we're looking for
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