topic Re: NFS in Operating System - HP-UX

NFS

Mridul Dutta — Fri, 17 Mar 2006 11:38:02 GMT

Hi Friends..

I am new in HP-UX. I have some doubts in NFS/NIS. Questions are as follows ..please help me

Q 1) what is the diff between NFS 2 and NFS 3
Q 2) what is diff between direct mapping and indirect mapping in NFS.
Q 3 ) what is automounter and autofs

Thanks n Regards

Mridul

Re: NFS

Senthil Kumar .A_1 — Fri, 17 Mar 2006 11:43:23 GMT

Hi,

Difference between..direct and indirect mapping..

http://docs.hp.com/en/5991-1153/ch02s05.html#bghbfahb

Others searching....

Regards,
Senthil Kumar .A

Re: NFS

Jeff_Traigle — Fri, 17 Mar 2006 11:45:12 GMT

A major difference between NFS 2 and 3 is that v2 is UDP only. NFS over TCP was introduced with v3.

Re: NFS

James A. Donovan — Fri, 17 Mar 2006 11:45:55 GMT

A1) I think the major difference between V2 and V3 is that V3 supports NFS over TCP. Earlier versions only supported NFS over UDP

A2) see the automount man page ('man automount') for a description of indirect and direct maps.

A3) autofs is basically a newer version of automounter.

Re: NFS

Senthil Kumar .A_1 — Fri, 17 Mar 2006 11:47:04 GMT

Hi again,

Here goes..

Diff b/w nfs v2 and v3

http://www.hummingbird.com/support/nc/nfs/allplatforms/other6.html?cks=y

Advantages of AutoFS over Automounter..

http://docs.hp.com/en/5991-1153/ch02s06.html#bbjeacjd

regards,
Senthil Kumar .A

Re: NFS

Nguyen Anh Tien — Sun, 19 Mar 2006 21:14:16 GMT

Advantages of version 3 over NFS version 2 are:

NFS version 3 supports 64-bit file offset, whereas version 2 is limited to 32 bits. A file offset of 32 bits can address a maximum file size of 2 GBytes. NFS version 3 supports a maximum file size of 128 GBytes.

Version 3 supports asynchronous I/O using kernel buffer cache management that provides data safety.

File handle size up to 64 bits can be used.

Cache management is improved.

Re: NFS

dipesh_2 — Mon, 20 Mar 2006 00:08:06 GMT

Hi,

1) only diff. between nfs2 and nfs3 is - nfs2 support over udp and nfs3 supports over tcp.

2) Direct mapping and indirect mapping ('http://docs.hp.com/en/5991-1153/ch02s05.html#bghbfahb')

3) autofs is newer version of automount