[linux-lvm] Performance problem.

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Mon Nov 17 19:18:01 UTC 2003

  I am afraid I do not have much else to suggest other than trying the
  new  2.6.0-test9  kernel  with device mapper. I am running it and so
  far it is very stable (and quick).

> ftp to localhost
> starts on 10.2mb/sec, goes stable for a short while, then stops
> for a few seconds (4-5), then continues in about 5-6 until the
> transfer is complete.

> all my stuff are on seperate irq's.

> when I copy, "system" load skyrockets, 60-85%.
> lftp and glftpd is the processes using resources.  I could try
> smb aswell, but I'm guessing I'll find that eating my system
> resources aswell.

>>   Hm.  You  seem  to  have  quite the problem :( Could it be that some
>>   logging  is  turned  on  and spewing data as soon as you copy larger
>>   files  etc? Have you looked on CPU usage while copying, or looked on
>>   IRQ assignments (NIC might share with IDE controller)?
>>   Could  also  be NIC that is not using a good driver? I have had that
>>   before  both  with  Intel  and  RealTek  cards.  Actually,  when you
>>   mention it there are two Intel Pro 100 drivers in the kernel (Donald
>>   Becker and Intel original I think). Try switching between the two.
>>   Did you try Samba or FTP locally? If that works good then it is most
>>   likely something to do with the networking parts of your system.

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