NFS

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi All,

I was just wondering if someone can possibly explain some NFS situation to
me?

I've tested NFS over a WAN type environment in two scenarios, both of them,
being horribly slow.

Scenario one:
--------------
Server is in London, on a 2MB leased line, while the client, was on a 128KB
Leased line, running a vpn and blowfish encryption.
bash-2.03# time dd if=/dev/zero of=/root/tmp/test-60M-1 bs=16k count=4096
4096+0 records in
4096+0 records out
67108864 bytes transferred in 56541.615297 secs (1187 bytes/sec)

real    942m35.448s
user    0m0.010s
sys     0m1.930s

MRTG showed that the 128K line was nowhere near peaking, and thus, can I be
right to presume that NFS did not utilise all the available bandwidth to
transfer this file?

Scenario two:
---------------
Server is in London, on a 2MB leased line, while the client was on a 540KB
Leased line, without running over the encrypted VPN.
su-2.03# time dd if=/dev/zero of=/root/tmp/test-60M-1 bs=16k count=4096
4096+0 records in
4096+0 records out
67108864 bytes transferred in 25887.387617 secs (2592 bytes/sec)

real    431m48.407s
user    0m0.017s
sys     0m1.177s

Once again, my MRTG graphs showed NFS did only utilise a fraction of the
available bandwidth...


If anyone know what I'm doing wrong, or how I can improve these figures,
PLEASE let me know???  Surely, over 540KB Leased Lines, 2.5KB/Sec is just
plain and simply ridiculous?  We're resting between providers at the moment
to get the one who will best suite our needs, but it's starting to look as
if it's rather a software issue than a provider / network issue, so any help
will be very much appreciated.

Regards,
Chris Knipe

Technical Administrator
Vardus (Pty) Ltd
Cape Town - South Africa
Tel:  (+27) 21 670 9880
Fax: (+27) 21 674 4549
Cell: (+27) 83 430 8151

-
: send the line "unsubscribe linux-net" in
the body of a message to majordomo@vger.kernel.org


[Index of Archives]     [Netdev]     [Ethernet Bridging]     [Linux 802.1Q VLAN]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Git]     [Bugtraq]     [Yosemite News and Information]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux PCI]     [Linux Admin]     [Samba]

  Powered by Linux