Patrick Ben Koetter put forth on 7/22/2010 2:11 AM: > * Stan Hoeppner <s...@hardwarefreak.com>: >> Wietse Venema put forth on 7/21/2010 2:22 PM: >>> Ram: >>>> One server of ours just accepts the mails from clients and then relays >>>> the mails to other servers. >>>> Since there is almost no mail queued on the server , I think it is will >>>> be good to mount /var/spool/postfix on a tmpfs partition. >>> >>> You will lose all mail in the queue when the system crashes. >>> I agree with Victor that this is a really bad idea. >> >> +3 >> >> If you truly have a _need_ for a super fast Postfix queue, I suggest using a >> good quality wear leveling SSD. You'll get random I/O performance many times >> greater than a 15k rpm disk, but with data persistence, unlike when using a >> ramdisk queue. There are many fast good quality SSDs available in various >> capacities for between $100-200 USD, in standard 2.5" and 3.5" hard disk >> mounting form factors. > > You can get about 150 msg/sec a 100k on a single Postfix instance if you use > a set of 10k rpm discs in a RAID 0 and server hardware.
If my math is correct, I believe Ram's relay server has a queue load of less than 15 msg/sec on average, which is easily handled by a single SATA disk. 50,000/hr = 50,000/3600 = 13.88 msg/sec Ram, why are you considering ramdisk or SSD for your Postfix queues given that a regular disk would seem to handle your load rather easily? Or, is this more of a philosophical issue of not wanting to write anything to disk that isn't permanent? -- Stan
