What Is SQLite? SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. SQLite is the most used database engine in the world. SQLite is built into all mobile phones and most computers and comes bundled inside countless other applications that people use every day. More Information... The SQLite file format is stable, cross
This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "T-tree" – news · newspapers · books · scholar · JSTOR (June 2013) An example T-tree In computer science a T-tree is a type of binary tree data structure that is used by main-memory databases, s
One of the (few) advantages of being in technology for a long time is that you get to see multiple tech cycles beginning to end. You get to see how breakthroughs actually propagate. If all you have seen is a part of the curve, it’s hard to extrapolate correctly. You either overshoot the short-term progress or undershoot the long. What’s surprising is not how quickly the facts on the ground change,
HyPer – A Hybrid OLTP&OLAP High Performance DBMS HyPer is a main-memory-based relational DBMS for mixed OLTP and OLAP workloads. It is a so-called all-in-one New-SQL database system that entirely deviates from classical disk-based DBMS architectures by introducing many innovative ideas including machine code generation for data-centric query processing and multi-version concurrency control, leadin
Aerospike Graph, utilizing Apache TinkerPop and Gremlin, suits applications that rely on vital data relationships, ensuring easy integration and powerful traversal capabilities. Support for flexible JSON document models to query support to store, search, and manage complex, hierarchical data sets and workloads. Develop applications that draw similarity-based insights against very large data sets t
An ultra-fast, ultra-compact, crash-proof, key-value, embedded data store Symas LMDB is an extraordinarily fast, memory-efficient database we developed for the OpenLDAP Project. With memory-mapped files, LMDB has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases. Bottom line, with only 32KB of object code, LMDB may seem tiny. But it’
Introduction The traditional wisdom for building disk-based relational database management systems (DBMS) is to organize data in heavily-encoded blocks stored on disk, with a main memory block cache. In order to improve performance given high disk latency, these systems use a multi-threaded architecture with dynamic record-level locking that allows multiple transactions to access the database at t
This is an interview with MemSQL cofounder’s Eric Frenkiel and Nikita Shamgunov, in which they try to answer critics by going into more depth about their technology. MemSQL ruffled a few feathers with their claim of being the fastest database in the world. According to their benchmarks MemSQL can execute 200K TPS on an EC2 Quadruple Extra Large and on a 64 core machine they can push 1.2 million tr
This is the first in a series of blog posts in which I will explore various aspects of On-Line Transaction Processing (OLTP). In this post, I'll examine main memory storage as an alternative to disk for traditional and “New OLTP” systems. Traditional relational DBMSs, Hadoop and most of the NoSQL offerings store their data on disk. In contrast, VoltDB is a main memory DBMS. First, it should be
Welcome to the web presence of the Database Research Group at University of Tübingen. Our group pursues a variety of “all-time classic” database research questions—prime examples include query language design, translation, and optimization—but with a few twists: We are particularly interested in the design, compilation, and optimization of expressive database languages that support rich data model
It’s pretty clear to computer science geeks that Directed Edge is supposed to be doing groovy things with graphs. In fact our recommendation engine, and some of the things that are unique about our approach to recommendations, are built on our super-fast graph database. When we went live yesterday with the latest version of our recommendations web services, another, much bigger thing happened behi
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