sap hana

Published on May 2016 | Categories: Documents | Downloads: 100 | Comments: 0 | Views: 795
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Sap provides these 4 pieces of software under sap hana Main component is the database itself. It is an in memory database. Its called sap hana db Sap hana provides the set of modeling tools under the sap hana studio component of sap hana Sap also offers sap hana appliance. The computer term appliance is used for the marriage of the hardware and the softwares specially tuned for the hardware. So there are certified vendors that offer hardware on which sap hana s/w can be installed. So that appliance is the hardware Also available in cloud infrastructure. It is available as a service on the cloud infrastructure

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So we understand that in-memory sap hana database is very fast. So where from this performance comes from? Solid state drives (like memory chips, crystals) are static drives unlike the magnetic rotating drives so data is available almost immediately without seek time.

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In-memory .. can be used for OLTP or OLAP applications. OLTP are moregeared towards operations and users are using this system to enter day to day data. Say you purchase something from the wallmart. it goes into the oltp system to create the record. So the day to day activities are handled by the oltp systems so they require a database where inserts and updates happen very fast and perform well enough with deep queries. Olap is more targeted more towards management where they want to query system and do more analysis. They wont be doing more inserts and updates but they will be doing more queries in the system. These are 2 different kind of systems with 2 different kind of audience and 2 different kind of tuning required. Sap hana can be used for both of them.

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Also, sap hana offers query processing environment for structured databases like 2d tables. And less structured data like text, graphs etc. So it can be used for both. Keep in mind OLTP and OLAP are structured data.

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SAP database is 100% ACID compliant. It guarantees reliability of database transactions

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Another misconception is that HANA is an acronym.

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SAP AG offers more than 1 db. Sap hana is only one of the db provided by SAP AG

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Competition As an appliance it is at competition with the vendors above

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These are the vendors which are certified for installation of sap hana hardware

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Sap is famous for ERP software which captures all work done in an enterprise business.

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SAP is an OLTP software

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SAP is also is warehouse application, such as SAP Busoness Intelligence(BI)

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What is Business Intelligence(BI) and what is Online Analytical Processing(OLAP)? It is basically geared towards management of company. This data is used for forecasting.

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Here we have 2 different databases, one for ERP and one for BI. ERP database handles transactional data and is an OLTP. BI database handles analytical data and is thus an OLAP. First: We move data from oltp to olap for load balancing.

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Second: Data is also aggregated in BI (OLAP) The problem here is, that there is a lag. This lag occurs because the data needs to be moved from ERP database to BI database. Also the data is not Up to date because the movement of data is not too frequent.

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Third: It’s a challenge for sap company to work with database vendor in case something gone wrong. This means supporting others work.

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The oltp and olap are in the same database. This address the 3 challenges. 1. no two databases 2. no moving of data 3. no 3rd party database

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Sap hana is not a software you can download and install. It requires a special hardware. It is an appliance

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Evolved From 3 different softwares

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Tax Return and Extraction (TREX)

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In 1997 it was created by Software AG and Siemens later sap took over it and changed its name to SAPDB

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Light database, lack good compression

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Row Based : Like Oracle Column Based: Like HANA

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Row Oriented: Require processing all required lines of records Column Oriented: Require only 1 line of record This makes column oriented databases ideal for processing group functions.

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Row Oriented: Require adding 1 line of record Column Oriented: Require processing all lines of record This makes Row oriented databases ideal for processing Insert/Delete.

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All the data in SAP HANA is stored in RAM or Solid State Drives (Flash Memory) Compression ratio is better in column oriented database architecture.

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