[asterisk-users] Asterisk RT on Disk On Module Performance and Durability

[Jeremy McNamara]

Erick Perez wrote:
> Hi,
> Im doing some research for Disk on a Module (DOM) with asterisk 
> realtime. To have no moving parts for a special project, I know I can 
> use 3.5 or 2.5 HDDs but DOMs sound interesting.
>  
> Does someone have working experience with this?
> Basically the Asterisk Realtime will be stored in MySQL and the DB will 
> be stored in a Disk on a Module.



There are better ways than RealTime to configure asterisk, but that is a 
religious war, so I won't discuss it.



> I have read that the usual standard is 2,000,000 MTBF and 2,000,000 
> Read/Write Cycles.



 From my experience it is only writes that matter.



> Is there an utility/section/procedure that can "count/display" the reads 
> and writes a normal Linux system does? That result can be extrapolated 
> to understand, in terms of days/week/months how much time a Disk on 
> Module will last.
>  
> Anyone with field experience?


Setup the system to mount a Ramdisk for the various standard locations 
(/var and /tmp and /). Symlink the standard files from a ROM partition 
to your mounted ramdisk / (root) partition. Then only write to the flash 
when absolutely necessary, like for system updates.


Usually I charge for this kind of info, so consider yourself lucky since 
I am in a good mood today. (oddly enough)




Jeremy McNamara