[mythtv] RAMDISK

[Isaac Richards]

On Friday 01 November 2002 10:15 am, Robert Kulagowski wrote:
> Did some quick calculations; 30 seconds of buffering at 3300Kbps
> would require 12-13 megabytes of DRAM.  Do we know if the linux
> buffer cache architecture is smart enough to handle this case without
> requiring a re-read from disk?  I won't have access to my linux box
> until this weekend, so I can't test it out on my own.  Any thoughts
> on whether having a ringbuffer in DRAM on a RAM disk would help, with
> a worker thread writing from the in-memory buffer to disk rather than
> reading and writing directly to disk?  It might help smooth out some
> hard drive issues, where concurrent access on slower hard drives
> might cause hiccups.

Too complicated to do properly -- and once the reader gets more than 30 
seconds away from the writer, you're back to the same amount of disk activity 
as before.

Isaac