On Tue, 16 Dec 2014 12:10:42 +0300 Mike wrote:
> 16.12.2014 10:53, Daniel Schwager пишет:
> > Hallo Mike,
> >
> >> This is also have another way.
> >> * for CONF 2,3 replace 200Gb SSD to 800Gb and add another 1-2 SSD to
> >> each node.
> >> * make tier1 read-write cache on SSDs
> >> * also you ca
16.12.2014 10:53, Daniel Schwager пишет:
> Hallo Mike,
>
>> This is also have another way.
>> * for CONF 2,3 replace 200Gb SSD to 800Gb and add another 1-2 SSD to
>> each node.
>> * make tier1 read-write cache on SSDs
>> * also you can add journal partition on them if you wish - then data
>> will
Hallo Mike,
> This is also have another way.
> * for CONF 2,3 replace 200Gb SSD to 800Gb and add another 1-2 SSD to
> each node.
> * make tier1 read-write cache on SSDs
> * also you can add journal partition on them if you wish - then data
> will moving from SSD to SSD before let down on HDD
> * o
15.12.2014 23:45, Sebastien Han пишет:
> Salut,
>
> The general recommended ratio (for me at least) is 3 journals per SSD. Using
> 200GB Intel DC S3700 is great.
> If you’re going with a low perf scenario I don’t think you should bother
> buying SSD, just remove them from the picture and do 12 S
Hello,
On Mon, 15 Dec 2014 22:43:14 +0100 Florent MONTHEL wrote:
> Thanks all
>
> I will probably have 2x10gb : 1x10gb for client and 1x10gb for cluster
> but I take in charge your recommendation Sebastien
>
> The 200GB SSD will probably give me around 500MB/s sequential bandwidth.
Intel DC S3
I was going with a low perf scenario, and I still ended up adding SSDs.
Everything was fine in my 3 node cluster, until I wanted to add more nodes.
Admittedly, I was a bit aggressive with the expansion. I added a whole
node at once, rather than one or two disks at a time. Still, I wasn't
expect
Thanks all
I will probably have 2x10gb : 1x10gb for client and 1x10gb for cluster but I
take in charge your recommendation Sebastien
The 200GB SSD will probably give me around 500MB/s sequential bandwidth. So
with only 2 SSD I can overload 1x 10gb network.
Hum I will take care of osd density
Salut,
The general recommended ratio (for me at least) is 3 journals per SSD. Using
200GB Intel DC S3700 is great.
If you’re going with a low perf scenario I don’t think you should bother buying
SSD, just remove them from the picture and do 12 SATA 7.2K 4TB.
For medium and medium ++ perf using
...@lists.ceph.com] On Behalf Of
Florent MONTHEL
Sent: 15 December 2014 19:45
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Number of SSD for OSD journal
Hi,
I’m buying several servers to test CEPH and I would like to configure journal
on SSD drives (maybe it’s not necessary for all use cases
Hi,
I’m buying several servers to test CEPH and I would like to configure journal
on SSD drives (maybe it’s not necessary for all use cases)
Could you help me to identify number of SSD I need (SSD are very expensive and
GB price business case killer… ) ? I don’t want to experience SSD bottleneck
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