https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262153#M9965 <P>Now documented here:<BR /> <A href="http://docs.splunk.com/Documentation/Splunk/latest/DistSearch/SHCsystemrequirements">http://docs.splunk.com/Documentation/Splunk/latest/DistSearch/SHCsystemrequirements</A></P> <P>At 7.0.2, the max is 100 search heads in a cluster; Thanks @hexx</P> Wed, 14 Feb 2018 18:52:35 GMT lguinn2 2018-02-14T18:52:35Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262146#M9958 <P>Is there a limit to how many Search Heads can be part of a Cluster?</P> <P>We have a fairly large deployment and I wanted to know if there is a max limit of the amount of SH's that can be part of any one cluster.</P> Thu, 08 Oct 2015 20:28:57 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262146#M9958 katelynengel 2015-10-08T20:28:57Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262147#M9959 <P>I believe that the maximum number of members currently supported in a search-head cluster is 50.</P> <P>I am not finding this documented <A href="http://docs.splunk.com/Documentation/Splunk/6.3.0/DistSearch/SHCsystemrequirements">in the expected location</A>, so I am going to ask for this to be corrected.</P> Thu, 08 Oct 2015 20:35:21 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262147#M9959 hexx 2015-10-08T20:35:21Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262148#M9960 <P>Hi katelynengel, I don't know if there is a theoretical limit to the amount of members in a cluster (close analysis of the raft consensus algorithm that is the foundation for the cluster might reveal that <A href="https://raft.github.io/">https://raft.github.io/</A> ), there is a practical limit based on latency between members, and the time it takes for changes to propagate.</P> <P>If you have anything under a couple dozen members you should probably be fine. If you are planning on implementing a cluster of something like 50, you should let Splunk know as they will probably be very interested to hear of the results.</P> <P>Let me know what you think <span class="lia-unicode-emoji" title=":grinning_face_with_smiling_eyes:">😄</span></P> Thu, 08 Oct 2015 20:38:01 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262148#M9960 muebel 2015-10-08T20:38:01Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262149#M9961 <P>By the way, just to disambiguate: Are you talking about an indexer cluster, a search-head cluster or a combination of both?</P> Thu, 08 Oct 2015 20:45:45 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262149#M9961 hexx 2015-10-08T20:45:45Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262150#M9962 <P>I meant Search Head Cluster but I would also be interested in the limit for an Indexer Cluster.</P> Fri, 09 Oct 2015 12:29:48 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262150#M9962 katelynengel 2015-10-09T12:29:48Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262151#M9963 <P>Thanks! I'll pass along to my team. <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> Fri, 09 Oct 2015 12:30:26 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262151#M9963 katelynengel 2015-10-09T12:30:26Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262152#M9964 <P>I don't think that we have identified a limit in the number of search-heads that can be attached to an indexer cluster. Of course, if those search-heads are going to be members of a search-head cluster, you'd want to keep that number at a maximum of 50 if you want to remain within the supported boundaries.</P> Fri, 09 Oct 2015 20:09:29 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262152#M9964 hexx 2015-10-09T20:09:29Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262153#M9965 <P>Now documented here:<BR /> <A href="http://docs.splunk.com/Documentation/Splunk/latest/DistSearch/SHCsystemrequirements">http://docs.splunk.com/Documentation/Splunk/latest/DistSearch/SHCsystemrequirements</A></P> <P>At 7.0.2, the max is 100 search heads in a cluster; Thanks @hexx</P> Wed, 14 Feb 2018 18:52:35 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/262153#M9965 lguinn2 2018-02-14T18:52:35Z https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/753328#M29695 <P>This is confirmed in the latest docs<BR /><A href="https://help.splunk.com/en/splunk-enterprise/administer/distributed-search/9.3/deploy-search-head-clustering/system-requirements-and-other-deployment-considerations-for-search-head-clusters#maximum-number-of-instances-0" target="_blank">https://help.splunk.com/en/splunk-enterprise/administer/distributed-search/9.3/deploy-search-head-clustering/system-requirements-and-other-deployment-considerations-for-search-head-clusters#maximum-number-of-instances-0</A></P> Fri, 19 Sep 2025 12:01:37 GMT https://community.splunk.com/t5/Deployment-Architecture/Is-there-a-limit-to-how-many-Search-Heads-can-be-part-of-a/m-p/753328#M29695 bmunson_splunk 2025-09-19T12:01:37Z