![]() Documents are stored in JSON document format with no predefined schemas. Data format Ī document is the most basic unit of data manipulation in Couchbase Server. It supports working sets greater than a memory quota per "node" or "bucket".Įxternal systems can subscribe to filtered data streams, supporting, for example, full text search indexing, data analytics or archiving. Parameters define item ages that affect when data is persisted, and how max memory and migration from main-memory to disk is handled. In version 1.7 and later, applications can optionally ensure data is written to more than one server or to disk before acknowledging a write to the client. It asynchronously writes data to disk after acknowledging to the client. The data manager stores and retrieves documents in response to data operations from applications. In December of 2012, support was added for replication between different data centers. The cluster manager uses the Erlang programming language and the Open Telecom Platform.ĭata replication within the nodes of a cluster can be controlled with several parameters. It also provides metric aggregation and consensus functions for the cluster, and a RESTful cluster management interface. It configures and supervises inter-node behavior like managing replication streams and re-balancing operations. The cluster manager supervises the configuration and behavior of all the servers in a Couchbase cluster. ![]() In the parlance of Eric Brewer's CAP theorem, Couchbase is normally a CP type system meaning it provides consistency and partition tolerance, or it can be set up as an AP system with multiple clusters. Starting with the 4.0 release, the three services can be distributed to run on separate nodes of the cluster if needed. Architecture Įvery Couchbase node consists of a data service, index service, query service, and cluster manager component. In December of 2012, Couchbase Server 2.0 (announced in July 2011) was released and included a new JSON document store, indexing and querying, incremental MapReduce and replication across data centers. In September of 2012, Orbitz said it had changed some of its systems to use Couchbase. In January 2012, Couchbase released Couchbase Server 1.8. The merged company was called Couchbase, Inc. announced a merger with CouchOne (a company with many of the principal players behind CouchDB) with an associated project merger. On February 8, 2011, the Membase project founders and Membase, Inc. ![]() The original membase source code was contributed by NorthScale, and project co-sponsors Zynga and Naver Corporation (then known as NHN) to a new project on in June 2010. Membase was developed by several leaders of the memcached project, who had founded a company, NorthScale, to develop a key-value store with the simplicity, speed, and scalability of memcached, but also the storage, persistence and querying capabilities of a database. ![]() It is designed to be clustered from a single machine to very large-scale deployments spanning many machines.Ĭouchbase Server provided client protocol compatibility with memcached, but added disk persistence, data replication, live cluster reconfiguration, rebalancing and multitenancy with data partitioning. In support of these kinds of application needs, Couchbase Server is designed to provide easy-to-scale key-value, or JSON document access, with low latency and high sustainability throughput. These applications may serve many concurrent users by creating, storing, retrieving, aggregating, manipulating and presenting data. Couchbase Server, originally known as Membase, is an open-source, distributed ( shared-nothing architecture) multi-model NoSQL document-oriented database software package optimized for interactive applications.
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