Hi all,

I have one physical machine with 2 LPAR installed.

The application data files are stored in SAN.

Now, I have a filesytem mounted to LPAR 1.

How can the filesystem being access by LPAR 2 ?

Using NFS seems to be a solution.

However, just wonder, can that filesystem "mounted" to LPAR 2, too ?
If yes, any direction on how to do so ?
Also, any special things needed to be concern about ?


Alvin SIU

On Thu, 01 Nov 2007 14:21:24 +0000, Alvin SIU wrote:

> Hi all,
>
> I have one physical machine with 2 LPAR installed.
>
> The application data files are stored in SAN.
>
> Now, I have a filesytem mounted to LPAR 1.
>
> How can the filesystem being access by LPAR 2 ?
>
> Using NFS seems to be a solution.
>
> However, just wonder, can that filesystem "mounted" to LPAR 2, too ? If
> yes, any direction on how to do so ? Also, any special things needed to be
> concern about ?
>
>
> Alvin SIU

The only way I'm aware of is the separate GPFS product that comes with its
own set of issues...

-Chris

Christopher Petersen schrieb:
> On Thu, 01 Nov 2007 14:21:24 +0000, Alvin SIU wrote:

>>
>> How can the filesystem being access by LPAR 2 ?
>>
>
> The only way I'm aware of is the separate GPFS product that comes with its
> own set of issues...
>
> -Chris

One more option: Veritas CFS.
http://www.symantec.com/business/pro...245&pvid=209_1
I ever used it, I just know it exists.

On 2 Nov, 06:40, Thomas Braunbeck <Thomas.Braunb...@orange.fr> wrote:
> Christopher Petersen schrieb:
>
> > On Thu, 01 Nov 2007 14:21:24 +0000, Alvin SIU wrote:
>
> >> How can the filesystem being access by LPAR 2 ?
>
> > The only way I'm aware of is the separate GPFS product that comes with its
> > own set of issues...
>
> > -Chris
>
> One more option: Veritas CFS.http://www.symantec.com/business/pro...pcid=2245&pvid...
> I ever used it, I just know it exists.

I assume at the moment you are just defining a SAN disk to LAPR1 and
setting up an AIX filesystem?

Depending on the type of SAN you have you may be able to define a
filesystem share on the SAN itself which can then be shared between
servers. Im not sure how 'locking' of files would happen in this case
- ie you dont want to be updating one file on both servers at the same
time.

We dont use SAN filesystem shares but its something we probably will
do once the SAN guys say its ready for use.

For now I think I'd be inclined to just use NFS.

Scott

NFS is a great easy solution, however, it all depends on what you are
going to do with this filesystem ? if there is going to be a lot on i/
o or many writes and reads, then you will probably hit issues with
NFS. GPFS is pretty good for high throughput and SANFS is ok to.
Both handle locking as does NFS. The other option is enhanced
concurrent VG which comes with HACMP which also controls the locking
etc..

HTH
Mark Taylor