SAP HANA

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SAP HANA is SAP AG’s implementation of in-memory database technology. There are four components [1] within the software group:    SAP HANA DB (or HANA DB) refers to the database technology itself, SAP HANA Studio refers to the suite of tools provided by SAP for modeling, SAP HANA Appliance refers to HANA DB as delivered on partner certified hardware (see below) as an appliance. It also includes the modeling tools from HANA Studio as well as replication and data [2] transformation tools to move data into HANA DB, SAP HANA Application Cloud refers to the cloud based infrastructure for delivery of applications (typically existing SAP applications rewritten to run on HANA).



HANA DB takes advantage of the low cost of main memory (RAM), data processing abilities of multi-core processors and the fast data access ofsolid-state drives relative to traditional hard drives to deliver better performance of analytical and transactional applications. It offers a multi-engine query processing environment which allows it to support both relational data (with both row- and column-oriented physical representations in a hybrid engine) as well as graph and text processing for semi- and unstructured data [2] management within the same system. HANA DB is 100%ACID compliant. While HANA has been called variously an acronym for HAsso's New Architecture (a reference to SAP founder Hasso Plattner) and High Performance ANalytic Appliance, HANA is a name not an acronym.
[3]

SAP HANA is the synthesis of three separate products – TREX, P*Time and MaxDB. 1. TREX (Text Retrieval and Extraction) is a search engine. It began in 1996 as a student project at SAP in collaboration with DFKI. TREX became a standard component in SAP NetWeaverin 2000. In-memory attributes were added in 2002 and columnar data store was added in 2003, both as ways to enhance performance. 2. In 2005 SAP acquired Menlo Park based Transact in Memory, Inc. With the acquisition came P*Time, an in-memory light-weight online transaction processing (OLTP) RDBMStechnology with a row-based data store. 3. MaxDB (formerly SAP DB), a relational database coming from Nixdorf via Software AG (Adabas D) to SAP, was added to TREX and P*Time to provide persistence and more traditional database features like backup. In 2008, SAP CTO Vishal Sikka wrote about HANA "...our teams working together with the Hasso Plattner Institute and Stanford University demonstrated how a new application architecture is possible, one that enables real-time complex analytics and aggregation, up to date with every transaction, in a way never [3] thought possible in financial applications". In 2009 a development initiative was launched at SAP to integrate the three technologies above to provide a more comprehensive feature set. The resulting product was named internally and externally as NewDB until the change to HANA DB was finalized in 2011.
[5]

SAP HANA is not SAP's first in-memory product. Business Warehouse Accelerator (BWA, formerly termed BIA) was designed to accelerate queries by storing BW infocubes in memory. This was followed in 2009 by Explorer Accelerated where SAP combined the Explorer BI tool with BWA as a tool for performing ad-hoc analyses. Other SAP products using in-memory technology wereCRM Segmentation, By Design (for analytics) and Enterprise Search (for role based search on structured and unstructured data). All of these were based on the TREX engine. Taking a different approach Advanced Planning and Optimization (APO) used LiveCache for its analytics. [edit]Versions,

service packs

SAP co-founder (and Chairman of the SAP Supervisory Board as of 2012) Hasso Plattner advocated a [1] ‘versionless’ system for releases. The support packages to date have been:      SP0 – released 20 November 2010; HANA first public release SP1 – released 20 June 2011; HANA general availability (GA); focus is as an operation data mart SP2 – released 27 June 2011; more data mart functions SP3 a.k.a HANA 1.5 – released 7 November 2011); focus is on HANA as the underlying database under Business Warehouse (BW); also named Project Orange SP4 – projected Q2, 2012; will resolve a variety of stability issues and add new features for BW, according to SAP

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