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| eXtremeDB | |
|---|---|
| Developer | McObject LLC. |
| Stable release | 8.2 / 2021; 5 years ago (2021) |
| Operating system | Cross-platform |
| Type | DBMS |
| License | Commercial license |
| Website | www |
eXtremeDB is a high-performance, low-latency,ACID-compliantembedded database management system using anin-memory database system (IMDS) architecture and designed to be linked intoC/C++ based programs. It runs onWindows,Linux, and otherreal-time andembedded operating systems.
eXtremeDB was introduced in 2001 by McObject LLC, targetingembedded systems running in resource-constrained environments (i.e. with limitedrandom-access memory and relatively low-poweredcentral processing units). eXtreme DB has a small code size, only about 150KB. It has nativeC languageapplication programming interface and available source code. eXtremeDB has a high degree of portability to support the varied processors andoperating systems used inembedded systems. Early deployments by customers included integration indigital TVset-top boxes, manufacturing and industrial control systems, and telecom/networking devices. eXtremeDB emerged to manage what industry analysts, and McObject, portray as significant growth in the amount of data managed on such devices.[1][2][3]
Later editions targeted the high-performance non-embedded software market, including capital markets applications and real-time caching for Web-based applications, including social networks and e-commerce.[4]
eXtremeDB supports the following features across its product family.[5]
eXtremeDB supports multiple concurrent users, offeringACID-compliant transactions (as defined by Jim Gray[6]) using either of two transaction managers: a multiple-reader, single writer (MURSIW) locking mechanism, ormultiversion concurrency control (MVCC) transaction manager (optimistic non-locking model).[7][8]
eXtremeDB can work with virtually allC language data types including complex types includingstructures,arrays,vectors, andBLOBs.Unicode is supported.
The eXtremeDBhigh availability edition supports both synchronous (2-safe) and asynchronous (1-safe)database replication, with automaticfailover.[9] eXtremeDB Cluster edition provides forshared-nothing database clustering. eXtremeDB also supports distributed query processing, in which the database is partitioned horizontally and the DBMS distributes query processing across multiple servers, CPUs, and CPU cores.[10] eXtremeDB supports heterogeneous client platforms (e.g. a mix ofWindows,Linux, andRTOSs) with its clustering and high availability features. A single partitioned database can include shards running on hardware and OS platforms.
The eXtremeDB Fusion edition provides the option ofpersistent storage (disk orflash) for specific tables, via adatabase schema notation.[11]
The eXtremeDBTransaction Logging edition records changes made to the database and uses this log to recover in the event of device or system failure. This edition includes eXtremeDB Data Relay technology that replicates selected changes to external systems such as enterprise applications and database systems.
The eXtremeSQL edition providesSQLODBC support in eXtremeDB and a version 4, level 4JDBC driver.[12][13]
The eXtremeDB Kernel Mode edition deploys the database system within an operating systemkernel, to provide database functions to kernel-based applications logic.[14]
The eXtremeDB Financial Edition provides features for managingmarket data (tick data).[15] A “sequences” data type supports columnar data layout and enables eXtremeDB to offer the benefits of acolumn-oriented database in handlingtime series data. The Financial Edition also provides a library of vector-based statistical functions to analyze data in sequences, and a performance monitor.
McObject published reports on benchmark tests employing eXtremeDB.Main-Memory vs. RAM-Disk Databases: a Linux-Based Benchmark examinedIMDS performance versus that of a traditionalon-diskDBMS deployed on aRAM disk, on identical application tasks. The benchmark’s stated goal was to test the thesis that an IMDS streamlined architecture delivers a performance benefit beyond that provided by memory-based storage.[16] Another benchmark, theTerabyte-Plus In-Memory Database System (IMDS) Benchmark, documented IMDS scalability and performance in the size range of large enterprise application (versus embedded systems) databases. For the test, engineers created a 1.17 terabyte, 15.54 billion row database with eXtremeDB on a 160-core SGIAltix 4700 system runningSUSE Linux Enterprise Server 9.[17]
In November, 2012 a marketing report was published forDell servers withMellanoxInfiniBand.[18]
In late 2014, two more audited benchmark reports were dedicated to eXtremeDB Financial Edition. The first, dated October 29, evaluated McObject's DBMS performance on IBM POWER8 hardware, while the second, on November 18, detailed its application in cloud computing. In 2016, an additional report was conducted to gauge the capabilities of the eXtremeDB Financial Edition.[19]
{{cite web}}: CS1 maint: bot: original URL status unknown (link) Forrester Research, 11/13/2009
, McObject