topic Re: Need of the daemosn nfskd abd nfsktcpd in Operating System - HP-UX

Need of the daemosn nfskd abd nfsktcpd

Sagar Sirdesai — Mon, 01 Jun 2009 10:09:26 GMT

Hi
nfskd and nfsktcpd

Please suggest why these 2 daemons are need in hp-ux

Re: Need of the daemosn nfskd abd nfsktcpd

Michal Kapalka (mikap) — Mon, 01 Jun 2009 10:18:38 GMT

hi,

its a core subsystem from NFS.

NFS Kernel thread daemon - nfskd

mikap

Re: Need of the daemosn nfskd abd nfsktcpd

Michal Kapalka (mikap) — Mon, 01 Jun 2009 10:24:04 GMT

hi,

check this link.

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1243855378937+28353475&threadId=880150

mikap

Re: Need of the daemosn nfskd abd nfsktcpd

Sajjad Sahir — Mon, 01 Jun 2009 10:40:56 GMT

Dear Sagar

These are nfs daemons and are controlled by

/etc/rc.config.d/nfsconf file.

thanks and regards

Sajjad Sahir

Re: Need of the daemosn nfskd abd nfsktcpd

Sagar Sirdesai — Tue, 02 Jun 2009 04:14:58 GMT

Thanks for the replies.

Please let me know what is the need of these daemons.

Sagar

Re: Need of the daemosn nfskd abd nfsktcpd

Michal Kapalka (mikap) — Tue, 02 Jun 2009 04:30:10 GMT

Hi Sagar,

check this link :

http://books.google.sk/books?id=AEV1x84DVkUC&pg=PA80&lpg=PA80&dq=hpux+usage+of+nfskd&source=bl&ots=nDu3Ru2mVC&sig=gGuti569uJftCuVeV8bphu7A27k&hl=sk&ei=ebckSvDzIsaM_QaV5uXuBw&sa=X&oi=book_result&ct=result&resnum=5#PPA80,M1

there are chapter :

4.1.2 - nfsktcpd
4.1.3 - nfskd

it's from book :

Prentice Hall PTR - Optimizing NFS performance

Re: Need of the daemosn nfskd abd nfsktcpd

Sagar Sirdesai — Thu, 04 Jun 2009 05:40:12 GMT

Thanks to Michal for the link

After reading the Document I have doubt

So nfsktcpd daemon is used for NFS over TCP .

Now by default all NFS request use TCP so does this mean the nfsd daemon is rarely used on in HP-11i

Re: Need of the daemosn nfskd abd nfsktcpd

Michal Kapalka (mikap) — Thu, 04 Jun 2009 05:51:22 GMT

Hi,

its depend on the used NFS version.

http://www.unixguide.net/hp/faq/5.7.15.shtml

mikap

Re: Need of the daemosn nfskd abd nfsktcpd

Dave Olker — Thu, 04 Jun 2009 12:32:32 GMT

Hi Sagar,

> So nfsktcpd daemon is used for NFS over
> TCP .
>
> Now by default all NFS request use TCP so
> does this mean the nfsd daemon is rarely
> used on in HP-11i

If you're running HP-UX 11i v1 or v2 and you're only using NFS/TCP then the nfsktcpd threads will be doing all the work and the nfsd daemons will do no real work.

You can confirm this with nfsstat. That command shows a breakdown of how many requests arrived on connection-oriented transports (TCP) vs. connectionless transports (UDP). If you don't see any UDP requests then your nfsd daemons should be idle.

The nfskd daemon, as you probably already read, was a placeholder for implementing a threaded model for NFS/UDP that we never completed so it does nothing.

If you're running 11i v3 there is only a single nfsd daemon process running and all the UDP and TCP requests are serviced by threads owned by this process.

Regards,

Dave

Re: Need of the daemosn nfskd abd nfsktcpd

Sagar Sirdesai — Wed, 10 Jun 2009 06:46:36 GMT

Hi Dave

Thanks for the information
So if I am using 11.11 and 11.23 then nfsktcpd daemon handles the NFS requests.
So there is need for only nfsd daemon which handles the TCP connections.

So Can I stopped the nfsd from running as this will reduce cpu utilisation.

Re: Need of the daemosn nfskd abd nfsktcpd

Aryan — Wed, 10 Jun 2009 10:38:03 GMT

Hi Sagar,

nfsd daemons are responsible for handling the majority of all NFS server requests with the exception of MOUNT requests and file locking requests.

Special nfsd daemon is called as nfsktcpd.

These daemons must be running on a system for it to serve NFS filesystems.

May be this link will help you out more.
http://my.safaribooksonline.com/0130428167/ch04

Regards,
Aaryan

Re: Need of the daemosn nfskd abd nfsktcpd

Dave Olker — Wed, 10 Jun 2009 13:17:44 GMT

Hi Sagar,

> So Can I stopped the nfsd from running as
> this will reduce cpu utilisation.

If your NFS server is not receiving any requests via UDP then why would the nfsd daemons be consuming CPU time? These daemons should be idle if there are no UDP requests.

Can you collect an "nfsstat -s" from the server and post it here?

Thanks,

Dave

Re: Need of the daemosn nfskd abd nfsktcpd

Sagar Sirdesai — Thu, 11 Jun 2009 04:22:33 GMT

Thanks to all for the response

Sagar