Re: [Dump-users] Slow dump

[Stelian P. <st...@po...>]

On Thu, Dec 09, 2004 at 04:17:19AM -0800, Kenneth Porter wrote:

> More data. Still using 2.6.9_1.6_FC2 stock Fedora Core 2 kernel. I mounted 
> this time like this:
> 
> mount //bigiron/BigBackup /mnt/Backup -t cifs -o 
> user=ken,password=xxxx,forcedirectio,wsize=65536,rsize=65536
> 
> A regular cp still takes a long time, but dd looks good:
> 
> time dd if=/home/ken/tmp/DesertCombat_0.7_Full_Install.exe 
> of=/mnt/Backup/test bs=65536
> 9460+1 records in
> 9460+1 records out
> 
> real    1m3.014s
> user    0m0.079s
> sys     0m12.475s

this is with a 64k block size

> 
> Alas, dump with 1 MByte transfers requested is still only getting 530 kB/s. 
> So it looks like it's back in dump's court. Dump command is:
> 
> dump 0u -b 1024 -Mf /mnt/Backup/sda1.dump -Q /mnt/Backup/sda1.qfa -B 
> 1000000 /mnt/sda1 -j9

And this with 1024k blocksize.

What does dd with bs=1M say ?

Stelian.
-- 
Stelian Pop <st...@po...>