[ceph-users] Monitor disks for SSD only cluster

[Valmar Kuristik]

Hello,

Can anyone say how important is to have fast storage on monitors for a
all ssd deployment? We are planning on throwing SSDs into the monitors
as well, but are at a loss about if to go for more durability or speed.
Higher durability drives tend to be a lot slower for the 240GB size we'd
need on the monitors, while lower durability would net considerably more
write speed.

Any insight into this ?

[Gregory Farnum]

As the monitors limit their transaction rates, I would tend for the
higher-durability drives. I don't think any monitor throughput issues have
been reported on clusters with SSDs for storage.
-Greg

Post by Valmar Kuristik
Hello,
Can anyone say how important is to have fast storage on monitors for a
all ssd deployment? We are planning on throwing SSDs into the monitors
as well, but are at a loss about if to go for more durability or speed.
Higher durability drives tend to be a lot slower for the 240GB size we'd
need on the monitors, while lower durability would net considerably more
write speed.
Any insight into this ?
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[Wido den Hollander]

Post by Gregory Farnum
As the monitors limit their transaction rates, I would tend for the
higher-durability drives. I don't think any monitor throughput issues
have been reported on clusters with SSDs for storage.

I can confirm that. Just make sure you have proper Datacenter Grade
SSDs. Don't go crazy with buying the most expensive ones, but stay away
from consumer grade SSDs.

Just make sure you have at least 100GB of free space should the MON
databases grow to a large size.

Wido

Post by Gregory Farnum
-Greg
Hello,
Can anyone say how important is to have fast storage on monitors for a
all ssd deployment? We are planning on throwing SSDs into the monitors
as well, but are at a loss about if to go for more durability or speed.
Higher durability drives tend to be a lot slower for the 240GB size we'd
need on the monitors, while lower durability would net considerably more
write speed.
Any insight into this ?
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ceph-users mailing list
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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