[CentOS] network problems
incoming-centos at rjl.com
Thu Mar 1 22:29:10 UTC 2012
On 03/01/2012 08:15 AM, m.roth at 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
> 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
> 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
> 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?
> CentOS mailing list
> CentOS at centos.org
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.
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