Has anyone installed a high I/O application such as an email server on SSD drives? Was thinking about doing two SSD's in RAID1. It would solve my I/O latency issues but I have heard that SSD's wear out quickly in high I/O situations? Something like each memory location only has X many writes before its done. Just wandering if anyone has tested it and if newer SSD's are better about this?
On 2/2/2012 1:19 PM, Matt wrote:> Has anyone installed a high I/O application such as an email server on > SSD drives? Was thinking about doing two SSD's in RAID1. It would > solve my I/O latency issues but I have heard that SSD's wear out > quickly in high I/O situations? Something like each memory location > only has X many writes before its done. Just wandering if anyone has > tested it and if newer SSD's are better about this? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centosit all depends on how much writing you do AND how much spare space the drives have. The more spare flash the drives have the longer they'll live due to being able to spread the writing wear over a larger area.
On 2 February 2012 18:19, Matt <matt.mailinglists at gmail.com> wrote:> Has anyone installed a high I/O application such as an email server on > SSD drives? ?Was thinking about doing two SSD's in RAID1. ?It would > solve my I/O latency issues but I have heard that SSD's wear out > quickly in high I/O situations? ?Something like each memory location > only has X many writes before its done. ?Just wandering if anyone has > tested it and if newer SSD's are better about this?Sun were recommending using SSDs for the ZIL in really big ZFS install *years ago* so go for it. As long as you are using TRIM then you avoid the slowdown that happens once the ssd is full http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html mike
On 02/02/2012 10:19 AM, Matt wrote:> Has anyone installed a high I/O application such as an email server on > SSD drives? Was thinking about doing two SSD's in RAID1. It would > solve my I/O latency issues but I have heard that SSD's wear out > quickly in high I/O situations? Something like each memory location > only has X many writes before its done. Just wandering if anyone has > tested it and if newer SSD's are better about this? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centosIs this the best way to go? Much of the recent mail software, postfix, dovecot etc has features which make it easier to set up redundant mailservers and distribute the load across them. This will scale better if your needs grow down the road. SSD's tend to be rather costly, especially if your storage needs are high. I guess the main advantage to a single server with SSD is lower power consumption. What about RAID10? Nataraj