SAP NetWeaver 2004s kernel updates explained -- Part I

An ABAP or Java-based SAP system runs on top of the SAP Web Application Server. This software serves as an abstraction layer between the underlying operating system and database system to the ABAP or Java applications. The applications then are coded and run in an OS and DB-independent manner. The execution environment of the applications is often referred to as a Runtime system.

Thus, the kernel of an SAP system consists of all native programs and dynamic libraries that are required for launching the Runtime, executing ABAP or Java codes, communicating with the outside world of the application server like OS, DB and network. These native binaries can be categorized through different aspects:

* DB-dependent vs. DB-independent: While all native binaries are OS-specific, they can be grouped in either database-dependent or independent manner. Mostly there are numerous database management systems available for a particular Operating System. The DB-dependent part -- which is small in size -- presents the abstraction layer to the particular database system and the DB-independent part -- which makes up the vast majority of all native codes -- presents the abstraction layer to the rest of the outside world.

*Unicode vs. Non-Unicode: Depending on users' requirement, an SAP system supports data encoding either as Unicode or as non-Unicode. Since the processing of Unicode data and non-Unicode data respectively are slightly different, the kernel binaries are compiled accordingly.

* Primary vs. subsidiary: Some of the kernel binaries are permanently loaded in the memory when the system is running. We call them primary. In other words, without the primary codes, the system is not functioning. Contrary to the primary programs, the subsidiary programs provide tools and services which are used occasionally, no matter whether the system is running or not, in terms of OS and DB abstraction.

How to get the kernel pa...

To read more you must become a member of SearchSAP.com

As an existing member of the TechTarget network please activate your SearchSAP.com account 

By joining SearchSAP.com you agree to receive email updates from the TechTarget network of sites, including updates on new content, magazine or event notifications, new site launches and market research surveys. Please verify all information and selections above. You may unsubscribe at any time from one or more of the services you have selected by editing your profile or unsubscribing via email.

TechTarget cares about your privacy. Read our Privacy Policy

Digg This!     StumbleUpon     Del.icio.us

RELATED CONTENT SAP NetWeaver tips Using SAP NetWeaver MDM with CRM, SCM and NetWeaver BI The importance of master data management following mergers and acquisitions Designing your SAP NetWeaver master data management strategy Enterprise MDM: SAP MDM for reducing data silos and duplicate records How to move SAP NetWeaver Enterprise Portal between servers Getting started with SAP NetWeaver PI (formerly XI) Top 10 SAP tips of 2007 Retrieve BI data with Web Services Eliminate database read/write times with ABAP shared memory XI: Search through the payload of a message... without TREX! SAP security administration SAP TechEd 2009 Phoenix: SearchSAP.com Special Report How to stop SAP users from displaying SAP HR tables content Locating user email addresses in SAP SU01 transaction code How to map multiple SAP roles and profiles Viewing SAP transaction codes and profiles Managing SAP user access and password expirations Can SAP developer include authority check for S_TCODE in a called transaction? Cisco and SAP integrate technologies to create data privacy application SAP administration information for a Basis interview Transferring R/3 Admin skills to SAP NetWeaver

RELATED RESOURCES 2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems Search Bitpipe.com for the latest white papers and business webcasts Whatis.com, the online computer dictionary

tches?

You can download the latest versions of the kernel patches from the SAP Service Marketplace (http://service.sap.com), either as part of an SP Stack or separately. However, you have to take following facts into account:

* What operating systems is your system running on? In some (although rare) cases, you need multiple variants of the kernel patches, because it's possible to install a SAP system in a cluster with different operating systems.

*Do you need a Unicode or non-Unicode kernel, or both of them? This question is especially relevant, if the system is ABAP-based. Java-based systems are always Unicode systems. A Double-Stack system runs both an ABAP and a Java engine, while the ABAP part runs with a non-Unicode kernel.

Once these details have been determined, you can go on with selecting the appropriate packages on the SAP Service Marketplace. There are two packaged files for each OS-DB-combination, SAPEXE.SAR for the DB-independent part and SAPEXEDB.SAR for DB-dependent part. As mentioned, the first file is much larger than the latter one. These two packages together consist of updates of all kernel binaries needed to patch the system kernel to level in required.

.SAR files are an SAP-specific archive format. You can extract this format with the tool SAPCAR which in turn is one of the kernel programs. Normally, the existing SAPCAR tool should be able to open the newer kernel package .SAR files with the existing SAPCAR. Occasionally it happens that you cannot open the newer .SAR files with the older SAPCAR, because the format has been enhanced. In this case, you can download SAPCAR alone from the SAP Service Marketplace. Other standalone tools are also available; SAPCPE which we will deal with in more detail later.

Read SAP NetWeaver 2004s kernel updates explained -- Part II

Want to read more from this author? Click here to read Storm Archer III's Weblog. Click here to read more about Application Server on SDN.