Christoph,
thx, that's reaussuring. I was not planning on using RAID though, the
SSD would just be there for Dom0 and all the OS partitions of the DomUs.
I may not got to the 4 years this way, but Ii hope to be able to get to
at least have of that or something,
cheers,
B.
On 03/08/12 12:10, Christoph Roethlisberger wrote:
We are using consumer grade SSD drives in a few of our servers for 4+
years now. (started with MTRON devices, switched to Intel later on and
lately also some Samsung drives)
Though we just started using SSD drives as DRBD backend storage
(hardware RAID6 - thus no TRIM anyways) we use similar configurations
in storage arrays for high IO performance virtual machines. (ESX mostly)
So far we had zero problems with it and no measurable performance
degradation and only one drive from the 100+ we have, failed so far.
Though this happened already after one of two weeks in operation and
was an electronic problem and not due to NAND wear out.
As long as the drives have some internal GarbageCollection (as most do
nowadays) and you make sure that they do never fill up completeley
(normally we format such arrays to a max of 90% of available space)
the absence of TRIM can be neglected in my opinion.
As far as TRIM support in DRBD goes - I don't know.
LVM may support it already in RAID0/1 setups, but MDRaid nor any
hardware RAID does it, (and hardware raid support may never ever
come/work beside raid0/1 setups) so this limits the use of TRIM
support in DRBD quite much.
Christoph
Hi all,
I was wondering if anyone is successfully SSD drives as their backend
storage devices. If so, I'm wondering if these drives do no degrade
quite fast seen there is no TRIM support in DRBD.
I'm also wondering if can motivate people to help sponsor this
feature. If the group is large enough, I suppose we can get this done
for not too much money.
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