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| <dl class="glossary docutils"> |
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| <div class="section" id="glossary"> |
| <h1>Glossary<a class="headerlink" href="#glossary" title="Permalink to this headline">ΒΆ</a></h1> |
| <blockquote> |
| <div><dl class="docutils"> |
| <dt>Cassandra</dt> |
| <dd>Apache Cassandra is a distributed, high-available, eventually consistent NoSQL open-source database.</dd> |
| <dt>cluster</dt> |
| <dd>Two or more database instances that exchange messages using the gossip protocol.</dd> |
| <dt>commitlog</dt> |
| <dd>A file to which the database appends changed data for recovery in the event of a hardware failure.</dd> |
| <dt>datacenter</dt> |
| <dd>A group of related nodes that are configured together within a cluster for replication and workload segregation purposes. |
| Not necessarily a separate location or physical data center. Datacenter names are case-sensitive and cannot be changed.</dd> |
| <dt>gossip</dt> |
| <dd>A peer-to-peer communication protocol for exchanging location and state information between nodes.</dd> |
| <dt>hint</dt> |
| <dd>One of the three ways, in addition to read-repair and full/incremental anti-entropy repair, that Cassandra implements the eventual consistency guarantee that all updates are eventually received by all replicas.</dd> |
| <dt>listen address</dt> |
| <dd>Address or interface to bind to and tell other Cassandra nodes to connect to</dd> |
| <dt>seed node</dt> |
| <dd>A seed node is used to bootstrap the gossip process for new nodes joining a cluster. To learn the topology of the ring, a joining node contacts one of the nodes in the -seeds list in cassandra. yaml. The first time you bring up a node in a new cluster, only one node is the seed node.</dd> |
| <dt>snitch</dt> |
| <dd>The mapping from the IP addresses of nodes to physical and virtual locations, such as racks and data centers. There are several types of snitches. |
| The type of snitch affects the request routing mechanism.</dd> |
| <dt>SSTable</dt> |
| <dd>An SSTable provides a persistent,ordered immutable map from keys to values, where both keys and values are arbitrary byte strings.</dd> |
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