Benny is right, if writes are smaller than the stripe size, there is no gain in speed in using raid5. Not only, but you can have lower performance than a single disk.
The ramdisk can be a good idea, but if the load is somewhat constant, you end only moving the slow write ahead of time. 200 calls at 64kbit/s are just 1.5 Mbyte/s ... even the slowest disk can accomplish this. Leandro 2012/8/4 Shahid H <shah...@gmail.com> > Instead of buying expensive disk.. I might setup a ramdisk (about 2GB) to > do 200 calls recordings. > > Once the call hangup/completed it will then move recording file to SATA > HDD. > > What do you think of this? > > > On Sat, Aug 4, 2012 at 5:51 PM, Benny Amorsen <benny+use...@amorsen.dk>wrote: > >> Leandro Dardini <ldard...@gmail.com> writes: >> >> > A single sata disk will be an unacceptable single point of failure. Get >> > three disks and get in raid5 configuration. You'll gain in safety and >> > speed. >> >> RAID-5 is slower than single disks when it comes to write IOPS (a commit >> is not done until the slowest disk has answered). Avoid it for write >> heavy workloads at all costs unless you are writing sequentially in one >> file with write caching enabled. >> >> >> /Benny >> >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> New to Asterisk? Join us for a live introductory webinar every Thurs: >> http://www.asterisk.org/hello >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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