SG HP-UX vs SG Linux

[JL Billman]

I have looked around o nthe the various HP web sites and I haven;t found what I am looking for. Does anyone know if there is a a document coverig migrating fro mServiceGuard on HP-UX 11i to ServiceGuard on RedHat (or any other version) Linux?

We now have an nfs paackage which mounts volumes from a virtual array and shares them out. Is there anything to help us migrate our scripts? I am wondering how many changes we will have to make between HP-UX LVM and RedHat LVM.

[Joe Short]

For the most part, you will be building an entirely new cluster. There are so many differences between the 2 operating systems that you will most likley need to modify any custom scripts you've written too.

[JL Billman]

Thanks Joe. Does anyone know if there is a documnet listing all the many differences? Or, do we just need to start fro mscratch?

[Serviceguard for Linux]

First, for NFS, there is a free toolkit. http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=T1442BA

This should adequately cover the differences for NFS implementations. If you have concerns about differences, at that level, you can add to this post or create a new one.

Most of the differences between the two versions are due to differences in the operating systems. My favorite example is the campus cluster. With HP-UX this is implemented with mirrordisk-ux and features within HP-UX LVM. On Linux we offer CLX with uses the Linux MD driver. A key difference here is that when a re-mirror is required, it is always a full re-mirror with Linux.

The installation process is different because of the use of RPMs (a standard method for installing SW on many Linux distributions). You will find differences in file locations.

What I have told people is that, if you know Serviceguard on HP-UX you can easily transfer those skills to Linux, but you may need to learn just a little about Linux.

Hope this helps, or ask a follow-up.

[Serviceguard for Linux]

To answer the last part of your question, I believe there is a customer presentation that covers some of the differences, but these are at a high level.

The "managing" manuals are very close to each other. One difference I believe you'll find there (for the 11.18 version) is that there is no SMS support on Linux.

Once you've glanced at that, you'll see that the script migration should generally just require handling the OS differences (file locations, any differences in the scripting syntax between HP-UX and Linux, etc.).

The release notes shows the install process, which is very different.