Messages in this thread | | | Date | Wed, 12 May 1999 01:57:29 +0200 | From | Thierry Danis <> | Subject | knfsd 1.2.2 & 2.2.7-ac1 : slow readings |
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Hello,
I have installed the RH 6.0 and have updated the kernel to 2.2.7-ac1.
I am testing NFS with iozone.
The NFS server is doing rather well with one client (6,8Mo/s with a 2.2.7-ac1 Linux client, 7,3 Mo/s with a FreeBSD client for writing, 5,0 Mo/s during reading for Linux, 4,8 Mo/s for FreeBSD).
Unfortunately, when I run both clients at the same time, reading performance drops drastically : 700 Ko/s each. During rereading, the load of the server climbs between 3 and 4.
When I run two iozones locally on the server, I get 3,5 Mo/s on each iozone (ie, the global rate is around 7 Mo/s, which is consistent).
So, to summary :
1) 1 NFS client : ~ 7 Mo/s writing, 5 Mo/s reading 2) 2 NFS clients: ~ 7 Mo/s writing, 1,5 Mo/s reading (cumulated)
3) 1 local client : ~ 9 Mo/s writing, 7 Mo/s reading 4) 2 local clients : ~ 9 Mo/s writing, 7 Mo/s reading. (cumulated)
Where can the problem (1,5 Mo/s) be ?
A +, -- Thierry Danis
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