Beginning migration to Linux (Tips and Advices)

[former_member277633]

Hi:

We have a Migration Project, and we are looking for information that can be useful to mígrate some of our SAP Clients to other Operating System. Actually, all of our clients are housed in Solaris, but we would like to migrate to some version of Linux.

First of all, we have these questions

- In the experience of the reader ¿which version of Linux do you recommend to implement SAP on it?

- ¿What would be the considerations or recommendations to follow, to successfully migrate from Solaris to Linux? (Any comments about this wide process, will be appreciated).

- ¿Is it possible to have, in the same landscape, some clients being on Solaris and another clients on Linux?

- If someone have links or documentation about these subject.

- And any other usefull comment about the experience of Linux of SAP, will be appreciated.

Thanks a lot.

abrahamdelgadov

[markus_doehr2]

We have a Migration Project, and we are looking for

information that can be useful to mígrate some of our

SAP Clients to other Operating System. Actually, all

of our clients are housed in Solaris, but we would

like to migrate to some version of Linux.

Just for the sake of interest - are there any reasons for this decision?

First of all, we have these questions

- In the experience of the reader ¿which version of

Linux do you recommend to implement SAP on it?

Check http://www.sap.com/linux

SAP supports currently RedHat (AS 4 + 5) and SuSE (SLES 9 + 10). The kernel itself is compiled on SuSE but RedHat will work as well.

- ¿What would be the considerations or

recommendations to follow, to successfully migrate

from Solaris to Linux? (Any comments about this wide

process, will be appreciated).

We use both OS´es and they are, aside from some kernel configuration, very similar. You will have maybe different options of command line tools (if you use the Solaris ones) but you will find your way quickly through the GNU´iefied tools.

- ¿Is it possible to have, in the same landscape,

some clients being on Solaris and another clients on

Linux?

yes, that´s possible.

- If someone have links or documentation about these

subject.

- And any other usefull comment about the experience

of Linux of SAP, will be appreciated.

We run almost all our systems on Linux, some are virtualized on Solaris using Zones for "historical" reasons (virtualization on Linux using XEN was not fitting out expectations at the time the decision was made).

Our main R/3 system servers ~ 1.100 users with a database size of 1.58 TB on MaxDB. Linux proved, compared to Windows (NT 4.0 EE where we came from), much more mature and stable. If you come from Solaris you will feel "at home" quickly. If you use Oracle as database there may be some "specialties" on Solaris, that are not (yet) available on Linux (speaking of filesystems like ZFS or features like Dynamic Intimate Shared Memory) but the system will run though fast and stable without those features.

Keep in mind, that for each migration project you need a certified migration consultant on-site, otherwise you (or the customer) will loose support for the target operating system (check http://service.sap.com/osdbmigration).

And to avoid misunderstandings: I´m not talking about clients as replacement for client operating system (Windows XP --> Linux) but about servers and clients in sense of YOUR clients as customers. If you talk about the client operating systems then please clarify what you want to do

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Markus