[CentOS] SSD support in C5 and C6

On 07/15/2013 07:33 AM, John Doe wrote:
> I do not think CentOS 5 supports TRIM (unless back-ported from 
> 2.6.33)... 
> http://kernelnewbies.org/Linux_2_6_33#head-b9b8a40358aaef60a61fcf12e9055900709a1cfb 
> JD _______________________________________________ CentOS mailing list 
> CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos 

AFAIK, EL5 doesn't support trim. We've been using SSDs for DB servers 
for almost 2 years and love 'em. Conservative performance estimates were 
off-the-charts: PostgreSQL query results with a 95% reduction in query 
latency, even after extended, continuous use. Haven't seen trim make 
much difference in actual performance.

Main thing is DO NOT EVEN THINK OF USING CONSUMER GRADE SSDs. SSDs are a 
bit like a salt shaker, they have only a certain number of shakes and 
when it runs out of writes, well, the salt shaker is empty. Spend the 
money and get a decent Enterprise SSD. We've been conservatively using 
the (spendy) Intel drives with good results.