On 03/01/2012 08:15 AM, m.roth@5-cent.us wrote:
We just moved a user, who deals with a *lot* of data, to a new server, since his old NFS home directory was on a disk that had started showing problems.
Now, i/o is about six times slower, my manager reports.
After a fair bit of googling, I started looking at tc and ip, and found the following: from ip address show, first, on the old home directory server, eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast qlen 1000 then, on the new: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
I've tried tc qdisc add dev eth0 mq pfifo_fast and tc qdisc add dev eth0 pfifo_fast
and neither works. I've googled, and seen something about you can't set something with tc, because pfifo_fast is the hardwired default.
Anyone know how I can reset this, or is there a package I can reinstall that would do that?
mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Are you sure your performance problems are network related? Have you measured performance of the filesystems on the two servers? You may have a data alignment problem with your disk partitions.
Nataraj