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Master may be used to mean a copy that has more significance than other copies in which case the term is an absolute concept; not a relationship. Sometimes the term master-slave is used in contexts that do not imply a controlling relationship. In database replication, the master database is the authoritative source. A replica database ...
A small Hadoop cluster includes a single master and multiple worker nodes. The master node consists of a Job Tracker, Task Tracker, NameNode, and DataNode. A slave or worker node acts as both a DataNode and TaskTracker, though it is possible to have data-only and compute-only worker nodes. These are normally used only in nonstandard applications.
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Its architecture is similar to GFS, i.e. a server/client architecture. The HDFS is normally installed on a cluster of computers. The design concept of Hadoop is informed by Google's, with Google File System, Google MapReduce and Bigtable , being implemented by Hadoop Distributed File System (HDFS), Hadoop MapReduce, and Hadoop Base (HBase ...
LizardFS is an open source distributed file system that is POSIX-compliant and licensed under GPLv3. [3] [4] It was released in 2013 as fork of MooseFS. [5]LizardFS is also offering a paid technical support (Standard, Enterprise and Enterprise Plus) with possibility of configurating and setting up the cluster and active cluster monitoring.
Point-to-point operations, as these are called, are particularly useful in patterned or irregular communication, for example, a data-parallel architecture in which each processor routinely swaps regions of data with specific other processors between calculation steps, or a master–slave architecture in which the master sends new task data to a ...
If an aggregate consists of two plexes, one plex is considered a master and second as a slave; slaves must consist of exactly the same RAID configuration and drives. For example, if we have an aggregate consisting of two plexes where the master plex consists of 21 data and 3 1.8 TB SAS parity drives in RAID-TEC, then the slave plex must consist ...
SPI follows a master–slave architecture, [1] called main–sub herein, [note 2] [note 3] where one [note 4] main device orchestrates communication with one or more sub (peripheral) devices by driving the clock and chip select signals.