|
We are building a PE2650/PE2550/PE1650 based network usind two net interfaces per box. One side of each box is public facing, connected via a 100Mb NetGear Hub. The other side is private, connected via a 1Gb NetGear Switch.
We have 11 boxes connected via the private network, and it is designed for inter-box data transfer such as backups, etc. However, on copying large files (>1GB) between two boxes via the private network, all other boxes on the network experience a crippling slowdown. CPU usage is in the low zeroes (0.02) on the other boxes at this time, so the slowdown is inside the kernel - is it being interrupted to death by the network interfaces?
All machines run RedHat 7.3 - one machine is soak-testing the latest 2.4.18-27 RedHat kernel whilst the others are running stock 2.4.20 kernels (got around the tg3 lockups) - but all are affected by this slowdown.
There are no errors/overruns reported in ifconfig. The slowdown does not appear if we use the slower public network for file transfers. We are using no fancy giggerypokery either with the kernels or the network interfaces.
This makes the whole concept of a Gigabit Network rather useless - can anyone help?
Seumas.
/"\----/"\ Seumas Macmhicean RHCE
\/ o o \/ Senior Systems Engineer
| qp |
\ /\ / Realise Ltd, Quay House, 142 Commercial Street, Edinburgh
[[><]] http://www.realise.com/ Tel: 0131-476 6000
__________________________________________________
This electronic message contains information which may be privileged and confidential. The information is intended to be for the use of the individual(s) or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic message in error, please notify us by telephone on 0131 476 6000 and delete the material from your computer.
| 