Oracle Exadata Database Machine racle Exadata Database Machine (Exadata) is a combined compute and storage system optimized for running Oracle Database software. Exadata debuted in 2008 as the first in Oracle’s family of "Engineered Systems", thought as software and"hardware engineered to come together". New generations of Exadata are released roughly when a year.
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Exadata combines scale-out compute servers, scale-out storage space servers, InfiniBand networking and specialized software, packed in more than one hardware racks, with various sizing options. Exadata compute servers utilize Intel Xeon processors and the Oracle Linux system that is operating run Oracle Database computer software. Exadata storage servers perform block storage functions and also run Exadata Storage Server Software to offload data database that is intensive into storage, closest to the data.
It really is Oracle’s claim that optimizing the entire compute/storage/networking infrastructure in Exadata for the Oracle Database enables it to end up being the best possible database host platform and that pre-integrating all the pc software and hardware simplifies setup, management, and troubleshooting for customers. Critics of Exadata point out that this limits it to running Oracle Databases, and it cannot be used as a general-purpose server. Industry analysts at IDC classify Exadata as an "Integrated Platform" with Oracle Engineered Systems having over 50% market share as of March, 2015. Analysts at Gartner place Oracle Engineered Systems into the leaders quadrant of their "Integrated Systems Magic Quadrant" report for 2014, providing Oracle the vendor that is top for "Integrated Stack techniques".
As of October 2015, Exadata is also available in the Oracle Public Cloud as a registration service - the Oracle Database Exadata Cloud Service, also known merely as the Exadata Service. Databases deployed in this Service include all the features and options of Oracle Database Enterprise Edition. Likewise, all Exadata features and capabilities are included in this Service. Oracle databases in the Exadata Service are 100% compatible with databases implemented on-premises, which allows customers to transition to the Cloud with no application changes. The infrastructure with this service - like the hardware, system, platform software and Exadata software, is managed by Oracle, while customers have complete ownership of their databases. Clients may do all necessary provisioning through the Oracle Cloud portal, with cloud-based automation tools available for backups, patching, expansion, etc.
Exadata is designed to optimally run any Oracle Database workload or mix of workloads. Long term requests, characterized by data warehouse queries, reports, batch jobs and analytics, are reputed to run many times faster in comparison to a main-stream, non-Exadata database server. Customer references often cite performance gains of 10x or greater. Analytics workloads can additionally use the Oracle Database In-Memory option on Exadata for extra acceleration. Exadata’s " Hybrid Columnar Compression" function is intended to lessen the storage consumption of information warehouses and archive data as well as increase performance by reducing the number of I/O.
Transactional (OLTP) workloads on Exadata gain benefit from the incorporation of flash memory into Exadata’s storage hierarchy, and the automatic "tiering" of information into memory, flash or disk storage. Special flash algorithms optimize flash for response time sensitive database workloads such as log writes. For high-end OLTP, all-flash storage (see Extreme Flash Storage Server below) eliminates the latency of disk media totally.
All Exadata workloads benefit from a really bandwidth that is high low latency internal InfiniBand fabric running a specific database network protocol called iDB.
Database consolidation on Exadata is common. To minimize resource contention between competing databases and workloads, "resource management" options that come with Exadata enable allocation that is prioritized of, I/O and network bandwidth.
Oracle Exadata Database device is available in two variants: one predicated on two-socket database servers and one other based on eight-socket database servers. The two models differ only in the hardware useful for the compute servers. The networking, storage space servers and software will be the same in both models.
The most Oracle that is recent Exadata device could be the X6 generation introduced in April, 2016.
The X6-2 compute servers feature a form that is small, 1 RU (Rack Unit) in height. They employ 2-socket Intel Xeon processors; each socket with 22 compute cores for 44 cores that are total compute server. Memory starts at 256 GB and that can be expanded to 768 GB.
The Exadata X6-2 Database Machine base configuration has 2 compute servers and 3 storage servers, called a "Quarter Rack". The same hardware is additionally obtainable in an "Eighth Rack" configuration with half of this processing turned off and half of the storage capacity either turned down or removed until needed. As the database workload and/or data size increases, additional compute and storage servers may be added to improve the amount of work performed in parallel. This is commonly referred to as "scale-out".
The X6-8 compute server utilizes eight-socket servers that consume 5 RU in height and now have greater memory capacity than the X6-2. Whereas each X6-2 compute server contains 44 compute cores, the X6-8 server contains 144 compute cores. This allows big database workloads to easily "scale-up" within a compute server while still supporting Exadata’s "scale-out" expandability across multiple servers. The larger memory capacity of the X6-8 additionally favors in-memory database and really big OLTP, consolidation, and DW workloads. The Exadata X6-8 base configuration has 2 compute servers and 3 storage servers, but consumes a "Half Rack" of space like the x6-2. Additional compute and storage servers may be added until the rack is full.