slow nfs to AIX 5.2+ML01

[MoshiachNow]

HI,

If I copy over nfs to myself (AIX 5.2,system=43P-150,1GB memory) from NFS mounted volume - I get arounf 3 MB/sec.
rcp of the same file from the same remote volume (NOT MOUNTED!) is around 6 MB/sec.
It was better on AIX 4.3.3.
I will appreciate any advise.

My NFS params are:
=====================================
nfso -a
portcheck = 0
udpchecksum = 1
nfs_socketsize = 600000
nfs_tcp_socketsize = 600000
nfs_setattr_error = 0
nfs_gather_threshold = 4096
nfs_repeat_messages = 0
nfs_udp_duplicate_cache_size = 5000
nfs_tcp_duplicate_cache_size = 5000
nfs_server_base_priority = 0
nfs_dynamic_retrans = 1
nfs_iopace_pages = 0
nfs_max_connections = 0
nfs_max_threads = 3891
nfs_use_reserved_ports = 0
nfs_device_specific_bufs = 1
nfs_server_clread = 1
nfs_rfc1323 = 0
nfs_max_write_size = 32768
nfs_max_read_size = 32768
nfs_allow_all_signals = 0
nfs_v2_pdts = 1
nfs_v3_pdts = 1
nfs_v2_vm_bufs = 1000
nfs_v3_vm_bufs = 1000
nfs_securenfs_authtimeout = 0
nfs_v3_server_readdirplus = 1
lockd_debug_level = 0
statd_debug_level = 0
statd_max_threads = 50

"Long live king Moshiach !"

http://www.7for70.com/

 

[ogniemi]

What is the network adapter media_speed setting?

lsattr -El entX -a media_speed


Check speeds between client <-> server with spray and netio.


regards, m.

 

[MoshiachNow]

Hi,

100 Mbps Full Duplex.

rcp gives around 6 MB/s,twice the NFS speed.
We do not have the utilities you mention.
Thanks

&quot;Long live king Moshiach !&quot;

http://www.7for70.com/

 

[ogniemi]

You should have spray utiulity:

$ lslpp -w /usr/sbin/spray
File Fileset Type
----------------------------------------------------------------------------
/usr/sbin/spray bos.net.nfs.client File

Example:

# spray remhost -c 1200 -d 2 -l 2000
sending 1200 packets of length 2000 to
remhost ...
no packets dropped by remhost
870 packets/second, 1740329 bytes/second

regards, m.


indeed, netio is not a part of AIX but it is very nice utility:

(on remhost you have to run &quot;netio -s&quot

# netio remhost

NETIO - Network Throughput Benchmark, Version 1.14
(C) 1997-2001 Kai Uwe Rommel

TCP/IP connection established.
Packet size 1 KByte: 11432 KByte/s
Packet size 2 KByte: 11564 KByte/s
Packet size 4 KByte: 11438 KByte/s
Packet size 8 KByte: 11439 KByte/s
Packet size 16 KByte: 8454 KByte/s
Packet size 32 KByte: 11564 KByte/s

 

[MoshiachNow]

Hi,

What is happening is the following:

RemoteHost pushes to localAIX5host over rcp - 8MB/s
localAIX5host pulls from RemoteHost over rcp - 8MB/s
localAIX5host pulls from RemoteHost over NFS- 3.5MB/s

The problem is only when the localAIX5host pulls over to hinself over NFS (as client).

&quot;Long live king Moshiach !&quot;

http://www.7for70.com/

 

[MoshiachNow]

Amazing ,

But the problem turned to be the slow system and data disks (old 9 GB ones ) on th 43P-150.
With good new disks the perfomance is good - 8 MB/sec.

Thanks

&quot;Long live king Moshiach !&quot;

http://www.7for70.com/