dsmiley commented on code in PR #4246: URL: https://github.com/apache/solr/pull/4246#discussion_r3007051961
########## solr/solr-ref-guide/modules/getting-started/pages/cluster-types.adoc: ########## @@ -0,0 +1,158 @@ += Solr Cluster Types +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +A Solr cluster is a group of servers that each run one or more Solr _nodes_. + +There are two general modes of operating a cluster of Solr nodes. +One mode provides central coordination of the Solr nodes (<<SolrCloud Mode>>), while the other allows you to operate a cluster without this central coordination (<<User-Managed Mode>>). + +TIP: "User Managed" and "Single Node" are sometimes referred to as "Standalone", especially in source code. + +Both modes share general concepts, but ultimately differ in how those concepts are reflected in functionality and features. + +First let's cover a few general concepts and then outline the differences between the two modes. + +== Cluster Concepts + +=== Servers and Nodes + +A _server_ is the hardware or virtual machine that hosts Solr software. +A _node_ is an instance of a running Solr process that services search and indexing requests. +Large servers may run multiple Solr nodes, though typically one node per server is most common. + +=== Shards + +In both cluster modes, a logical collection of documents can be divided across nodes as _shards_. Review Comment: FWIW I disagree and find that the word "logical" and it's opposite word "physical" are useful to understand indirect / almost abstract from the more tangible / real. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
