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testfile_mdo
2011 May 17
0
poor rsync performance with specific Linux kernel version?
...zero
of=/var/lib/vz/testfile_MDO bs=1024k count=8192 conv=fdatasync) on quite
a high-end system (Supermicro "X8DTI-F" board, 12 GB RAM, SAS disks on
Adaptec RAID controller) running Proxmox with a (Debian) Linux kernel at
that moment:
rsync --progress /var/lib/vz/testfile_MDO /var/lib/vz/testfile_MDO2
testfile_MDO
592379904 6% 949.34kB/s 2:20:24 ^C
I had to cancel due to the low speed at that time.
The issue seems related to the specific combination of hardware and that
particular kernel (Proxmox' "Debian" kernel 2.6.32). If I replace that
kernel with their alternative "Redh...