[Abcde-users] running multiple abcde/cdparanoia in parallel - performance issues

[Johannes Gernemann]

that's an impressive hardware setup you got there :-)

concerning the speed - what do you expect? As you are saying, you are using quite an "old PC". 1x CD speed is 150KB/s. Whatever your drives are capable of, they'll be sharing the total bandwidth of the busses. So does the harddisk. And you have to add read-from-CD time to write-to-HDD time. And then everything has to go through the CPU for encoding.
Theoretically you can rip as many in parallel as you want. Practically things will be happening more or less sequentially.

So how long does it actually take you to rip and encode (what format are you encoding?) let's say 4 CD's in parallel?

Johannes

Am 25.05.2015 um 12:51 schrieb Arthur Lutz:
> Hi,
>
> I've built a CD ripping machine from a bunch of old CDROMs and DVDRoms I
> had lying around and an old PC. So far I have 7 drives installed (the
> 8th is the hard drive). Here's a photo on my blog :
> http://arthur.lutz.im/blog/wp-content/uploads/2015/02/IMG_7576-e1422896399582-532x800.jpg
> (blog posts in french at the bottom of my email)
>
> The idea is to be able to RIP a large number of CDs with minimal user
> input. udev detects new cds, launches abcde, then the cds are ejected
> when ripping is done.
>
> I find that the speed at which the drives are being read by cdparanoia
> is pretty slow and am wondering if you had any tips or experience
> similar to this.
>
> On the hardware side, I have two IDE on the mother board on which there
> are 3 drives (and the HDD), and a PCI-IDE card on which there are two
> IDE slots with 4 drives on it.
>
> On the software side, am running debian jessie with kernel
> 3.16.0-4-686-pae, abcde 2.6-2 and cdparanoia 3.10.2+debian-11
>
> A look at the speed of transfer on the .wav files in /tmp/abcde* in
> speedometer http://i.imgur.com/8DPNzXa.png
>
> Should I be running the rips in sequence ? how many could I put in
> parallel ?
>
> Thanks for any advise.
>
> Arthur
>
> Blog posts in french :
> http://arthur.lutz.im/blog/2013/03/diy-ripstation-part-1/
> http://arthur.lutz.im/blog/2013/06/ripstation-diy-part-2/
> http://arthur.lutz.im/blog/2015/02/ripstation-part-3-un-peu-de-logiciel/
>
>
>
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