On 14-01-24 11:16 AM, Amit wrote: > > If I assume that Asterisk will write data on disk every second for > each call, I will need disk array to support minimum of 500 IOPS. > Where as if Asterisk push data every 2 seconds, I can deal with array > supporting 250 IOPS. > But if I assume that Asterisk will write data on disk for every RTP > packet received, as and when received, I will need disk IO system with > approx 25000 IOPS assuming 20 ms RTP packet. You're assuming that asterisk will perform an fsync() after each write. If asterisk writes without an fsync after each write, then the OS will schedule writes intelligently based on RAM/disk IO available rather than scheduling each one as a separate write.
Looking at the code for ast_writestream() there doesn't appear to be an fsync() type call after each write, but someone more familiar with the internals of Asterisk would be better able to verify that. -- Looking for (employment|contract) work in the Internet industry, preferably working remotely. Building / Supporting the net since 2400 baud was the hot thing. Ask for a resume! [email protected]
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