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SUSECON 2017
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SPO127196 - How to minimize or completely avoid downtimes in operating SAP (HANA) landscapes. Overview of related topics and methods with emphasis on OS handling.

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SAP on Linux? Yes, we’re doing that for nearly 20 years now, no issue in the meantime – SUSE Linux is more than mature enough for the task. If you run SAP on Linux, you will be also running SAP HANA – of course, also on Linux - if not now, then soon. The migration towards an in-memory-database HANA brings not only benefits like faster execution of transactions but also some interesting challenges regarding application downtime. Intrinsically, in-memory-DBs tend to make very demanding SLAs quite difficult and normally lead to longer downtimes compared to classical databases. Unfortunately, this typically conflicts with increased user requirements for shorter downtimes, and even zero downtime, without compromising classical goals like high degree of flexibility etc. The demand of short or zero downtime addresses both planned and unplanned downtimes, requiring solutions to address both different sets of requirements. (Near) Zero Downtime solution have to respect the whole stack from technical infrastructure like storage, network, server (including its OS), hypervisor technology, supporting software like clustering and other HA solutions, and last but not least the application itself. We look at all these components – with a special focus on SUSE SLES4SAP handling – and present possible solutions to each of them as well as an integrated solution for all of them together where downtime can be minimized or optimized. In this session we look at all areas of interest for minimizing or avoiding downtime of SAP HANA based applications, with a special focus on how to handle SUSE Linux, and show what possibilities exist to fulfill the demand in a single solution.


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