topic Re: NFS Issue in Operating System - HP-UX

NFS Issue

ManojK_1 — Fri, 24 Oct 2008 11:06:04 GMT

Hi Friends,

One of our application is running in nfs mount.Same filesystem is mounted from NFS Server to TWO NFS clients. All the Systems are rx6600, HP Unix 11.23 with 6 CPU and 24 GB memory.

The problem is that in one NFS client system the application is running very slow.

When i have checked for NFS related products installed on the the slow server it is only showing the following products.

NFS B.11.23 ONC/NFS; Network-File System,Information Services,Utilities
PHCO_32523 1.0 quota(1) on an NFS client;uid enhancement

When i have checked on the FAST System it is showing

NFS B.11.23 ONC/NFS; Network-File System,Information Services,Utilities
PHCO_31645 1.0 Japanese NFS/LIBNSL manpages
PHCO_31647 1.0 Japanese NFS manpages
PHCO_31661 1.0 Japanese NFS/RCMDS manpages
PHCO_31662 1.0 Japanese NFS/NIS manpages
PHCO_32523 1.0 quota(1) on an NFS client;uid enhancement
PHCO_33764 1.0 Japanese core NFS manpages
PHKL_32713 1.0 nfs client hang; cache FS umount
PHKL_35503 1.0 NFS Stale Handle Fix
PHNE_34756 1.0 Core NFS cumulative patch
PHNE_36257 1.0 NFS cumulative patch

So i have downloaded the missing patches but i am not able to install that, it is giving depenecy error. Can somebody can help me in this.

Manoj K

Re: NFS Issue

Suraj K Sankari — Fri, 24 Oct 2008 11:30:36 GMT

Hi,

If the dependency patch is not there then you are not able to install those patches so if possible download the hole depot or along with dependency patch also then try to install.

Suraj

Re: NFS Issue

V. Nyga — Fri, 24 Oct 2008 11:58:03 GMT

Hi,

it depends on which dependencies are missed - if you don't have Japanese NFS installed, then you don't have to patch it.
If there are dependencies to other patches like 'PHKL_32713 1.0 nfs client hang; cache FS umount' then you have to download it including the dependencies!
From patch database:
http://www11.itrc.hp.com/service/patch/mainPage.do

HTH
Volkmar

Re: NFS Issue

ManojK_1 — Mon, 27 Oct 2008 05:47:47 GMT

Thanks to all for there reply.

Atlast i have installed all the patches related to NFS and now the NFS client system which is giving slow respose is ok and working fine. I have used the following command to ignore the error script.

swinstall -x enforce_scripts=false -s /tmp/1/depot

Thanks again for all of you and i am closing this thread.

Manoj K

Re: NFS Issue

Dennis Handly — Mon, 27 Oct 2008 07:02:36 GMT

>to ignore the error script: swinstall -x enforce_scripts=false

Using this is very dangerous. I don't think you ever mentioned what were the missing dependencies?

Re: NFS Issue

Bill Hassell — Mon, 27 Oct 2008 11:40:46 GMT

> The problem is that in one NFS client system the application is running very slow.

Have you verified the LAN card settings? Use lanadmin to report on the current settings and statistics. If you see 100 Mbit half duplex and also see a bunch of errors such as collisions, then the card will run extremely slow. Since one client is OK, most likely the slow client's card has the problem.

Re: NFS Issue

ManojK_1 — Tue, 28 Oct 2008 13:46:30 GMT

Dear Dennis & Bill,

Thanks for the messages. I have done this intensively and i am aware that there may be a kernel panic or some performance effective issues.

After installing the patch the lan speed changed from 1000 to 100.

I have tried to revert it back by lanadmin command but it has given some error.

So i have resetted the card after that it is shown 1000.

Now i am not facing any performance issue anyway i will monitor the server performnace for some more days and publish the details in the froum.

Manoj K

Re: NFS Issue

ManojK_1 — Thu, 06 Nov 2008 06:46:29 GMT

Hi Dennis & Bill,

After working properly in two days the server is very slow and i have found the netwok connectivity is very slow in the server.

If i am pinging to other servers in the same segment by putting the size 8192 am getting time out.

How can i fix this ?

Manoj

Re: NFS Issue

Dennis Handly — Thu, 06 Nov 2008 11:23:55 GMT

>How can i fix this?

I suggest you continue this in your other thread where you have the NFS guru Dave on the hook. :-)
http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1282125

Re: NFS Issue

ManojK_1 — Thu, 06 Nov 2008 12:58:27 GMT

Hi dennis,

That is different issue which i am doing on my Training system.

And this issue is in my Development system.

Both are having same architecture so i am doing some testing before implementing it to Production.

Manoj

Re: NFS Issue

Bill Hassell — Fri, 07 Nov 2008 01:00:26 GMT

Before using (very complicated) NFS to test your system, you need to resolve your speed issues. To properly help you, we'll need to know something about both ends of the connections. It would appear that you have a Gigabit card, so the first place to fix your problem is at the switch. Is it a Gigabit switch or are you using a computer-to-computer cable? If it is a switch, you need to login to the switch and make sure the switch has been set to auto-negotiate. If the switch has no management capabilities, are your cables too long or not correct for Gigabit speeds? Long CAT5 cables will definitely not work well at all. Are the cables spliced together? Has the cable been crushed?

The fastest test is to run a different cable, or run a short cable to a nearby server. Gigabit cards will autosense the wiring so no crossover cable is needed. Once your speed remains solid at 1000, then use ftp or scp to send a few hundred meg file both directions and look at the reported bytes/sec number. Also look at lanadmin, the second half of the statistics (errors). A high number of errors indicates bad hardware (cables, switches, connectors) rather than software.

Once ftp/scp and lanadmin are clean, then you can use NFS with some confidence.