[CentOS] SSD for Centos SWAP /tmp & /var/ partition

[Gordon Messmer]

On 05/23/2011 12:24 PM, John R Pierce wrote:
> yes,butt....   SSD has to erase and write a LARGE block all at once, so
> they don't do so well with the sorts of 8k random writes that write
> intensive applications like relational databases commonly perform.

Many SSD are faster at writing even to already used blocks than disk 
drives are.  Still, to stay on topic, the suggestion that I put forth 
was to use the SSD for external journals for ext3 filesystems with 
journal=data.  In that case, the OS should pretty much always be writing 
full blocks to the SSD, so there should be even less concern about small 
random writes.