[CentOS] SSD for Centos SWAP /tmp & /var/ partition
Robert Nichols
rnicholsNOSPAM at comcast.net
Mon May 23 19:29:22 UTC 2011
On 05/23/2011 01:44 PM, Jerry Franz wrote:
>
> But, for paranoia's sake, I would RAID1 the SSD with a second SSD.
>
Quote from
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html
:
Red Hat also warns that software RAID levels 1, 4, 5, and 6 are not
recommended for use on SSDs. During the initialization stage of these
RAID levels, some RAID management utilities (such as mdadm) write to
all of the blocks on the storage device to ensure that checksums
operate properly. This will cause the performance of the SSD to degrade
quickly.
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