On Tue, 21 Jan 2003, Tru64 User wrote:
Hi there,
have you checked the block sizes of all involved Filesystems ?
Some Hints that come to my mind:
1. If the filesystem has huge blocks, increase the Block-sizes on the NFS
transfers in the /etc/fstab ...
2. Have you performed a bonnie-test on the disks on both systems ?
I bet you'll have on BOX 2 very slow write-speeds. Most probably due to a
not well configured Harddisk drivers. Check out using hdparm -I /dev/???
<raid-device>
It is possible that you'll have to install the 2.4.18Kernel from the
mandrake 8.2 on Box 2. remember - Bleeding Edge is nothing for productio
Systems - and I wouldn't use a 2.4.20 kernel in a working environement.
3. Eventually the Network-Card has not been configured to 100MBit
connection. Try out checking the network-Card speed on the System.
Cheers
Joerg
> Hi,
>
> Am having a heck of a time trying to figure out a
> bottleneck for NFS transfers.
> I have 2 Mandy boxes, acting only as NFS file servers.
>
> BOX1:
> 1.8Ghz, Mandt 8.2 Kernel 2.4.18, reiserfs, NFSv3 on
> 100MbitFD [ NIC:Intel Corp. 82820 (ICH2) Chipset
> Ethernet Controller (rev 03) ]
>
>
> BOX2:
> 2.4Ghz Dual Xeon Processors, Mandy 9.0 Kernel 2.4.20,
> LVM is being used, file system is still reiserfs,
> NFSv3 on 100MbitFD [ NIC:Intel Corp. 82557/8/9
> [Ethernet Pro 100] (rev 0d) ]
>
> -Both run iptables, no effect on transfer rates when
> iptables is on/off on either.
>
> Rate of transfer differs significantly!! They both
> serve disks (1Tb) to a single tru64 Unix server (Using
> IDE Raid, same configuration of RAIDcard and storage
> box)
>
> a 77GB transfer from Tru64Unix disk to an NFS mounted
> disk from BOX1, took about 8hrs.
>
> A 77GB transfer from Tru64Unix disk to an NFS mounted
> disk from BOX2, has taken two days and counting!!
>
> No NFS errors reported. Everything seems to be working
> perfectly!, except for the transfer rate!
> Even utlizing the RAID array without LVM, but on BOX2,
> yields the same very slow transfer rates! Is it
> something with Mandy9.0? or what else could help in
> troubleshooting the issue here?
>
> Clueless Richard,
>
> _Thanks
>
>
> =====
>
>
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