Apache ZooKeeper Platform
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An Apache ZooKeeper Platform is a distributed hierarchical key-value store.
- Context:
- It can (typically) be used to provide services, such as Distributed Configuration, Synchronization Service, and Naming Registry (for distributed systems).
- Example(s):
- Counter-Example(s):
- See: Solr, Key-Value Database, High-Availability Cluster.
References
2018
- https://docs.aws.amazon.com/emr/latest/ReleaseGuide/emr-zookeeper.html
- QUOTE: ... Apache ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. For more information about ZooKeeper, see http://zookeeper.apache.org/. …
2017
- (Wikipedia, 2017) ⇒ https://en.wikipedia.org/wiki/Apache_ZooKeeper Retrieved:2017-8-7.
- Apache ZooKeeper is a software project of the Apache Software Foundation. It is essentially a distributed hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed systems. ZooKeeper was a sub-project of Hadoop but is now a top-level project in its own right. ZooKeeper's architecture supports high availability through redundant services. The clients can thus ask another ZooKeeper leader if the first fails to answer. ZooKeeper nodes store their data in a hierarchical name space, much like a file system or a tree data structure. Clients can read from and write to the nodes and in this way have a shared configuration service. ZooKeeper can be viewed as an atomic broadcast system, through which updates are totally ordered. The ZooKeeper Atomic Broadcast (ZAB) protocol is the core of the system. ZooKeeper is used by companies including Rackspace, Yahoo!, Odnoklassniki, Reddit, NetApp SolidFire and eBay as well as open source enterprise search systems like Solr. ZooKeeper was originally developed at Yahoo for streamlining the processes running on Big Data cluster by storing the status in local log files on the ZooKeeper servers. These servers communicate with the client machines to provide them the information. ZooKeeper was developed in order to fix the bugs occurred while deploying distributed big data applications. Some of the prime features of Apache ZooKeeper are: * Reliable System: This system is very reliable as it keeps working even if a node fails. * Simple Architecture: The architecture of ZooKeeper is quite simple as there is a shared hierarchical namespace which helps coordinating the processes.
- Fast Processing: Zookeeper is a fast application which processes the applications with a speed ratio of 10:1 in case of reads.
- Scalable: The performance of ZooKeeper can be improved by adding the nodes further.
- Apache ZooKeeper is a software project of the Apache Software Foundation. It is essentially a distributed hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed systems. ZooKeeper was a sub-project of Hadoop but is now a top-level project in its own right. ZooKeeper's architecture supports high availability through redundant services. The clients can thus ask another ZooKeeper leader if the first fails to answer. ZooKeeper nodes store their data in a hierarchical name space, much like a file system or a tree data structure. Clients can read from and write to the nodes and in this way have a shared configuration service. ZooKeeper can be viewed as an atomic broadcast system, through which updates are totally ordered. The ZooKeeper Atomic Broadcast (ZAB) protocol is the core of the system. ZooKeeper is used by companies including Rackspace, Yahoo!, Odnoklassniki, Reddit, NetApp SolidFire and eBay as well as open source enterprise search systems like Solr. ZooKeeper was originally developed at Yahoo for streamlining the processes running on Big Data cluster by storing the status in local log files on the ZooKeeper servers. These servers communicate with the client machines to provide them the information. ZooKeeper was developed in order to fix the bugs occurred while deploying distributed big data applications. Some of the prime features of Apache ZooKeeper are: * Reliable System: This system is very reliable as it keeps working even if a node fails. * Simple Architecture: The architecture of ZooKeeper is quite simple as there is a shared hierarchical namespace which helps coordinating the processes.