On Mon, May 23, 2011 at 8:44 PM, Jerry Franz jfranz@freerun.com wrote:
On 05/23/2011 11:01 AM, Rudi Ahlers wrote:
Now, the question is, is is there any way to tell EXT3/4 to use a separate drive as a cache drive for the same purpose? OR, how about telling CentOS to use a separate drive for caching purposes in the same way?
You can use an external journal on a SSD to speed up at least writes by quite a lot.
http://insights.oetiker.ch/linux/external-journal-on-ssd/
But, for paranoia's sake, I would RAID1 the SSD with a second SSD.
-- Benjamin Franz _______________________________________________
Interesting, and it seems like it's similar to the ZFS cache drive scenario but will probably work better for what the OP had in mind, than putting the swap & logs onto the SSD drive.
I don't know if running SSD's in RAID1 will be that much more reliable. Surely if the exact same data is read & written (aka same amount of reads & writes take place) on both drive, then both will fail at the same time?