[vdr] Re: two or more harddrives and performance (filesystem streaming performance benchmark)

[Emil Naepflein <Emil.Naepflein@philosys.de>]

On Mon, 09 Feb 2004 09:56:05 +0100, Onno Kreuzinger <onnok@web.de>
wrote:

> yes, i can confirm the values to be close to what my stopwatch and du gave 
> for real vdr performance.(2 recorings, one cutting and one de-multiplexing 
> on console) give about 4,5 mb/s (Samsung/5400/2mb/80,120,160GB).

Since a long time I always slowed down the cutter thread by adding a
msleep() in the loop to limit the data rate to about 2 MB/s. Otherwise I
would get timeouts on the recordings menu. I now have about 400
recordings only which makes a large tree to scan.

> If you find a reasonable easyway, would you mind posting a short summary how 
> you did it :-)....
> I don't have the guts to test xfs on my vdr w/o having heard about a 
> succesfull mogration.

The migration was easy for me because I had enough space available to
move recordings to other partitions. I use a custom tool to move
complete recordings to a specific disk. 
XFS was already available in my kernel from previous tests. So the
conversion took only some time for the copy of about 100 GB data. The
fresh xfs filesystem will be filled with the new recordings
automatically.

Emil


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