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

Mon May 23 18:58:54 UTC 2011
Rudi Ahlers <Rudi at SoftDux.com>

On Mon, May 23, 2011 at 8:44 PM, Jerry Franz <jfranz at 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?

Kind Regards
Rudi Ahlers

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