[CentOS] SSD Drives

[Peter A]

On 02/02/12 14:05, Mike wrote:
> On Thu, 2 Feb 2012, William Warren wrote:
>
>> On 2/2/2012 1:19 PM, Matt wrote:
>>> Has anyone installed a high I/O application such as an email server on
>>> SSD drives?  Was thinking about doing two SSD's in RAID1.  It would
>>> solve my I/O latency issues but I have heard that SSD's wear out
>>> quickly in high I/O situations?  Something like each memory location
>>> only has X many writes before its done.  Just wandering if anyone has
>>> tested it and if newer SSD's are better about this?
>>>
>> it all depends on how much writing you do AND how much spare space the
>> drives have.  The more spare flash the drives have the longer they'll
>> live due to being able to spread the writing wear over a larger area.
>>
> How very timely, I'm just starting to investigate something similar
> myself.  I don't have much to contribute however this forum post:
> http://www.xtremesystems.org/forums/showthread.php?271063-SSD-Write-Endurance-25nm-Vs-34nm
> seems as though it'll be interesting, if I can ever make it through 3500+
> pages to get to the conclusion.
>
If you're worried about io reliability, then buy a (way more expensive) 
SLC drive, rather than the consumer level MLC... We have some SLC drives 
here that from their manufacturer have been rated at 3 or more years of 
100% write 24x7...

Peter.