> Is this process going to be running all of the time, or just run for a > few minutes/hours at a time? If for a few minutes at a time you may > want to use a raid0 ssd array for the data collection and then have > another process to move that data onto the raid6. If the data is > split multiple files (a few gb each) then the backend process can move > the finished files just behind the main process and if the files are > small enough then they will still be in file cache and you won't have > to read off of the ssd array, and you will be isolated from random > blips on the spinning disks. Give you are talking about 12 disks, if > one of those spinning disk blips it will be whatever timeout you set > on the disk assuming you have a disk that allows the timeout to be set > (the lowest I have found for that timeout is 0.1seconds). He did use SSDs to check this, with RAID-6, and the performance issue was the same, CPU-bound Vennlig hilsen roy -- Roy Sigurd Karlsbakk (+47) 98013356 http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- Hið góða skaltu í stein höggva, hið illa í snjó rita.
