https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455780#M12924 <P>Why not try&nbsp;a Google search: "Metadata server cluster" ?</P> <P>&nbsp;</P> <P>Results:</P> <UL> <LI><A href="http://support.sas.com/documentation/cdl/en/bisag/68240/HTML/default/n1w2q4quib18udn1h8oj0wxfmgx6.htm" target="_blank">SAS® Help Center: How Metadata Server Clustering Works</A></LI> <LI><A href="http://support.sas.com/documentation/cdl/en/bisag/68240/HTML/default/n1odroiqzm0fkhn16sakutai9qr5.htm" target="_blank">SAS® Help Center: Configuring a Metadata Server Cluster</A></LI> <LI><A href="http://documentation.sas.com/?docsetId=omaref&amp;docsetVersion=9.4&amp;docsetTarget=p1jmsj59l1lnlxn1ji5gj9l5yagt.htm" target="_blank">SAS® Help Center: Metadata Server Clustering</A></LI> <LI><A href="https://blogs.sas.com/content/sgf/2013/08/21/sas-9-4-metadata-cluster-what-and-why/" target="_blank">SAS 9.4 metadata cluster: what and why? - SAS Users Groups</A></LI> </UL> <P>&nbsp;</P> <P>In brief:</P> <UL> <LI>A metadata server cluster requires minimum three metadata servers ("nodes").</LI> <LI>If the cluster has an odd number of nodes, more than half are required to be running for the cluster to operate.</LI> <LI>If the cluster has an even number of nodes, half are required to be running for the cluster to operate, as long as the master node is included in that half.</LI> <LI>Although the cluster appears to the SAS user as a single metadata server, each node&nbsp;in the cluster maintains its own configuration files, metadata, logs &amp; journals.</LI> <LI>Apart from machine name, all nodes in the cluster must essentially be configured identically - operating system, file mounts/mappings, etc..</LI> <LI>IOM load processing, managed by the master node, is used for the nodes to communicate.</LI> <LI>Although it is common to see these as separate branches of shared storage, the nodes do not require shared storage.</LI> </UL> Fri, 20 Apr 2018 00:23:50 GMT AndrewHowell 2018-04-20T00:23:50Z https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455741#M12921 <P>Hello,</P> <P>In&nbsp;a cluster Metadata SAS Grid Environment, generally how many metadata servers are recommended to install 2 or 3.&nbsp; Where they will be installed on local storage or shared storage ?</P> <P>Thanks !</P> Thu, 19 Apr 2018 19:44:25 GMT https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455741#M12921 SAS_1001 2018-04-19T19:44:25Z https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455780#M12924 <P>Why not try&nbsp;a Google search: "Metadata server cluster" ?</P> <P>&nbsp;</P> <P>Results:</P> <UL> <LI><A href="http://support.sas.com/documentation/cdl/en/bisag/68240/HTML/default/n1w2q4quib18udn1h8oj0wxfmgx6.htm" target="_blank">SAS® Help Center: How Metadata Server Clustering Works</A></LI> <LI><A href="http://support.sas.com/documentation/cdl/en/bisag/68240/HTML/default/n1odroiqzm0fkhn16sakutai9qr5.htm" target="_blank">SAS® Help Center: Configuring a Metadata Server Cluster</A></LI> <LI><A href="http://documentation.sas.com/?docsetId=omaref&amp;docsetVersion=9.4&amp;docsetTarget=p1jmsj59l1lnlxn1ji5gj9l5yagt.htm" target="_blank">SAS® Help Center: Metadata Server Clustering</A></LI> <LI><A href="https://blogs.sas.com/content/sgf/2013/08/21/sas-9-4-metadata-cluster-what-and-why/" target="_blank">SAS 9.4 metadata cluster: what and why? - SAS Users Groups</A></LI> </UL> <P>&nbsp;</P> <P>In brief:</P> <UL> <LI>A metadata server cluster requires minimum three metadata servers ("nodes").</LI> <LI>If the cluster has an odd number of nodes, more than half are required to be running for the cluster to operate.</LI> <LI>If the cluster has an even number of nodes, half are required to be running for the cluster to operate, as long as the master node is included in that half.</LI> <LI>Although the cluster appears to the SAS user as a single metadata server, each node&nbsp;in the cluster maintains its own configuration files, metadata, logs &amp; journals.</LI> <LI>Apart from machine name, all nodes in the cluster must essentially be configured identically - operating system, file mounts/mappings, etc..</LI> <LI>IOM load processing, managed by the master node, is used for the nodes to communicate.</LI> <LI>Although it is common to see these as separate branches of shared storage, the nodes do not require shared storage.</LI> </UL> Fri, 20 Apr 2018 00:23:50 GMT https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455780#M12924 AndrewHowell 2018-04-20T00:23:50Z https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455939#M12928 <P>Thank you !</P> Fri, 20 Apr 2018 14:46:08 GMT https://communities.sas.com/t5/Administration-and-Deployment/SAS-Grid-Question/m-p/455939#M12928 SAS_1001 2018-04-20T14:46:08Z