Not logged in : Login

About: VirtClusteringDiagrams     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : atom:Entry, within Data Space : ods.openlinksw.com associated with source document(s)

AttributesValues
type
Date Created
Date Modified
label
  • VirtClusteringDiagrams
maker
Title
  • VirtClusteringDiagrams
isDescribedUsing
has creator
attachment
content
  • %META:TOPICPARENT{name="TedThibodeau"}% ---+ Clustering Deployment Architecture Diagrams for Virtuoso (Release 6 and later, Commercial Edition only) %TOC% ---++ Does my Virtuoso deployment support Replication Clustering and/or Elastic Clustering? [[VirtGraphReplication][Replication Clustering]] is a feature of all Commercial Editions of Virtuoso 6 and later. It is not available for use in the Open Source Edition (VOS). Elastic Clustering is enabled by the add-on Cluster Module of Virtuoso 7 and later. It is not available for use in the Open Source Edition (VOS). ---++ Replication Clustering Replication clusters provide redundancy and disaster recovery, and can provide some degree of load balancing -- but the downstream subscribers (commonly called "slaves") are entirely dependent on the upstream publishers ("masters") for their data. READ clients *may* be allowed to access any instance, but they will only get whatever data has flowed downstream through the replication topology at that point. In Star or Chain topologies, WRITE clients should only access the most upstream instance, so that all changes flow to all other instances. In a Bi-directional topology, it doesn't matter which instance a WRITE client targets -- but issues can arise from collisions, when conflicting WRITEs are made to opposite ends of the stream. ---+++ Simple Replication Clustering with Single-Server Virtuoso instances * [[VirtGraphReplicationStar][Star Topology]] %BR%%BR%%BR%%BR% * [[VirtGraphReplicationChain][Chain Topology]] %BR%%BR%%BR%%BR% * [[VirtGraphReplicationBiDirectional][2-node Bi-directional Topology]] %BR%%BR%%BR%%BR% ---++ Shared-Nothing Elastic Clustering Shared-Nothing Elastic Clustering is enabled by the Cluster Module, an optionally licensed component of Virtuoso 7 and later. Clients may access any instance in an Elastic Cluster, and every instance in the Elastic Cluster effectively has *all* data available to it at all times. Each Single-Server instance shown in the basic Replication Clustering, above, could be replaced by one of the "clouds" shown below. Typically, the deployment configuration within each "cloud" in a given Replication Cluster would be the same as in all the others, but there *are* circumstances where the instances in a replication cluster might not be identical. ---+++ Simple Elastic Clustering (quorums of 1 instance per cluster node) Adding hosts to an elastic cluster provides more resources, and thus improves performance, and increases capacities. The three clouds below may be viewed as a deployment's growth from initial deployment on one host (with one license file), expanding to 2 hosts (and two license files), and on to four hosts (and four license files). ---++++ Four cluster nodes, one cluster host node %BR%%BR%%BR%%BR% ---++++ Four cluster nodes, two cluster host nodes %BR%%BR%%BR%%BR% ---++++ Four cluster nodes, four cluster host nodes %BR%%BR%%BR%%BR% ---+++ High Availability Elastic Clustering (quorums of three instances per cluster node) The three clouds in this section may be viewed as a high-availability version of the preceding three, likewise evolving from smaller scale to larger scale. ---++++ Four cluster nodes, three instances per cluster node (quorum), four instances per cluster host node, three cluster host nodes %BR%%BR%%BR%%BR% ---++++ Four cluster nodes, three instances per cluster node (quorum), two instances per cluster host node, six cluster host nodes %BR%%BR%%BR%%BR% ---++++ Four cluster nodes, three instances per cluster node (quorum), one instance per cluster host node, twelve cluster host nodes %BR%%BR%%BR%%BR%
id
  • c7fc25c93ab159f184279e071cbf4537
link
has container
http://rdfs.org/si...ices#has_services
atom:title
  • VirtClusteringDiagrams
links to
atom:source
atom:author
atom:published
  • 2017-06-13T05:48:02Z
atom:updated
  • 2017-06-13T05:48:02Z
topic
is made of
is container of of
is link of
is http://rdfs.org/si...vices#services_of of
is links to of
is creator of of
is atom:entry of
is atom:contains of
Faceted Search & Find service v1.17_git150 as of Jan 20 2025


Alternative Linked Data Documents: iSPARQL | ODE     Content Formats:   [cxml] [csv]     RDF   [text] [turtle] [ld+json] [rdf+json] [rdf+xml]     ODATA   [atom+xml] [odata+json]     Microdata   [microdata+json] [html]    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3332 as of Sep 11 2024, on Linux (x86_64-generic-linux-glibc25), Single-Server Edition (15 GB total memory, 773 MB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2025 OpenLink Software