[mythtv] mythconverg on RAM drive?

Petr Stehlik pstehlik at sophics.cz
Thu Aug 3 06:26:28 UTC 2006


Chris Pinkham napsal(a):
> * On Wed Aug 02, 2006 at 08:26:58PM -0600, David Snider wrote:
>> I'm just curious if anyone is experiencing enough disk IO contention  
>> to justify the risk.

> I think you'll find that more time is spent performing the actual
> queries than reading data from the disk, so you might not be able
> to save that much time relative to the total time queries or
> reschedules take.

If it happened to be (way) faster in the RAM disk then I've just got an 
idea how to implement it safely: run two instances of MySQL, one with 
datastore in the RAM disk and the other one in standard /var/lib/... 
Then set up MySQL mirroring (forgot the proper term but I mean the MySQL 
support for master-slave setup). Master in RAM would deliver all data 
quickly and if there was a write operation it would get saved to disk in 
the slave MySQL :-) On boot up you'd want to copy all data from the 
slave to master, obviously.

Petr



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