SAP Hana Administration online training
SAP HANA is a powerful database from SAP in-built memory technology.SAP HANA usually needs less administration SAP suggests to migrate from previous databases to HANA database that has faster speed and analytics. SAP HANA Studio is a tool which is main component for SAP HANA ADMIN training so, the future world is with HANA data base for more productivity and more reliability.
SAP Trainings Online gives SAP training on your chosen SAP module or on any other technology to industry level and job oriented. An SAP HANA system contains all the server elements of an installation of SAP HANA
- An SAP HANA system consists of many servers, the foremost vital is the index server. The index server contains particular data stores and the engines for processing the data.
- A multiple-host or distributed SAP HANA system may be a system that is installed on more than one host. Otherwise, it is a single-host system. A host is a machine (comprised of CPU, memory, storage, network, and in operation system) that runs elements of the SAP HANA system
- An SAP HANA instance is the set of server components of a distributed system that are installed on one host.
- SAP HANA supports various isolated databases in a single SAP HANA system. These are referred to as multitenant database containers. Learn database concepts from SAP HANA training.
- An SAP HANA system installed on multiple hosts is known by a single system ID (SID). It is perceived as one unit from the perspective of the administrator, who can install, update, start up, shut down, or backup the system as a whole. Variance of server components of the system include the same metadata and requests from client applications can be transparently dispatched to different servers in the system.
- A multiple-container invariably has specifically one system database and any number of multitenant database containers (including zero), also known as tenant databases.
- In a multiple-container system, solely the system database runs the name server. The name server contains landscape information about the system as a whole, including which tenant databases exist. It also provides index server functionality for the system database. Unlike the name server in a single-container system, the name server of the system database in a multiple-container system doesn’t own topology data, that is, data concerning the placement of tables and table partitions in databases. Database-related topology information is stored in the relevant tenant database catalog.
SAP HANA Administration accessibility and scalability
HANA supports recovery measures starting from faults and software errors, to disasters that decommission a complete data center. Rich availability is the name given to a set of techniques, engineering practices and design principles that support the goal of business continuity.
High accessibility is achieved by eliminating single points of failure (fault tolerance), and providing the power apace resume operations after a system outage with minimal business loss (fault resilience). Fault recovery is that the method of recovering and resuming operations after an outage due to a fault. Disaster recovery is the process of recovering operations after an outage due to a prolonged data center or site failure. Preparing for disasters may require backing up data across longer distances, and may thus be more complex and costly.
The key to achieving high accessibility is redundancy as well as hardware redundancy, network redundancy and data center redundancy. SAP HANA provides many levels of defense against failure-related outages:
Hardware Redundancy – SAP HANA appliance vendors provide various layers of redundant hardware, software and network components, such as redundant power supplies and fans, enterprise grade error-correcting memories, fully redundant network switches and routers, and uninterrupted power supply (UPS). Disk storage systems use batteries to guarantee writing even in the presence of power failure, and use striping and mirroring to provide redundancy for automatic recovery from disk failures. Generally speaking, all these redundancy solutions are transparent to SAP HANA’s operation, but they form part of the defense against system outage due to single component failures.
Software – SAP HANA is relies on SUSE Linux Enterprise 11 for SAP and includes security pre-configurations (for example, minimal network services). In addition, the SAP HANA system software additionally includes a watchdog function, which automatically restarts configured services (index server, name server, and so on), just in case of detected stoppage (killed or crashed).
Persistence – SAP HANA persists group action or transaction logs, save-points and snapshots to network support system restart and recovery from host failures, with minimal delay and without loss of data.
Standby and Failover – Separate, dedicated standby hosts are used for failover, in case of failure of the primary, active hosts. This improves the availability by significantly reducing the recovery time from an outage.