On 13.11.2013 11:36, Götz Reinicke - IT Koordinator wrote:
Hi,
I'm testing a storage system and different network settings and I'm faced with a strange phenomen.
Doing a mkfs.ext4 on the centos server lasts 11 minutes.
The same mkfs.ext4 command on the debian installation is done in 20 seconds.
It is formatting a 14 TB 10Gbit ISCSI Target.
It is the same server. Centos and debian are installed on different internal harddisks.
Any explanations why debian is so f*** fast? Any hint?
Is it possible that you use a relatively recent debian version compared to the older centos 5/6 versions available? If so you might want to look into the "lazy_itable_init" option for mkfs.ext4 which is probabaly used in the debian case but not the centos case (but will probably be used in RHEL7).
Regards, Dennis