[Asterisk-Users] RAID affecting X100P performance...

[Kevin Walsh]

Steven Critchfield [critch at basesys.com] wrote:
> BTW, my raid card on my Dell 2450 had this output
> nash5:/home/critch# hdparm -tT /dev/sda
> 
> /dev/sda:
>  Timing buffer-cache reads:   128 MB in  0.61 seconds =209.84 MB/sec
>  Timing buffered disk reads:  64 MB in  2.52 seconds = 25.40 MB/sec
> 
My Dell 2400 (not used for Asterisk) with hardware RAID-5 over SCSI
gives me this:

/dev/sda:
 Timing buffer-cache reads:   128 MB in  0.61 seconds =209.84 MB/sec
 Timing buffered disk reads:  64 MB in  1.57 seconds = 40.76 MB/sec

I seem to be getting better performance out of mine, although I don't
recall doing anything special to achieve it.

The Asterisk box (IBM Netfinity 5600) with software RAID-1 over SCSI
gives me this:

/dev/sda:
 Timing buffer-cache reads:   856 MB in  2.01 seconds = 426.57 MB/sec
 Timing buffered disk reads:  104 MB in  3.02 seconds =  34.42 MB/sec

The Asterisk box is dedicated to the task, so sees little or no disk
activity most of the time.  Perhaps that explains the cache performance.

The Asterisk box has a single X101P, with none of the problems reported
in this thread.

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