![]() ![]() For large deployments, a stand-alone system is important. This system can be collocated with other Splunk services, or stand-alone. ![]() This separate system will distribute any search request across all configured search-peers improve search performance.Ī separate search head is shown here to support Splunk’s Enterprise Security (ES) applicationĭeployment Server. This strategy reduces search time and provides some redundancy of data-ingest and availability should a single server fail Multiple clustered search-peers (indexers) improves performance both during data-ingest and search. This architecture has several key components such as:Īn indexer tier with indexer clustering. Largely, most of this applies to most environments we see. A successful implementation is one that is efficient, scalable, follows information security best-practice, and is, most importantly, useful.Īlthough everything here is valuable, some of it does not apply for very small or specific implementations of Splunk. Many of these items come up time and time again during engagements and consideration of these items will result in a more successful implementation. StorageEngine : the engine is set to mmapv1 it won't be able to upgrade to 4.The recommendations in this document were compiled by Aplura‘s staff over their many years of Splunk administration and professional services engagements. We also completed the migration manually of some kvstores to the new wiredTiger engine but forgot to remove the storageEngineMigration=true line from the nf, also run a btool and make sure you don't have the engine hardcoded: splunk btool server list -debug |grep -i engine, wiredTiger is the default in 9.xĪ helpful doc: ~]$ splunk show kvstore-status -verbose |grep -i engine ![]() We were prevented from migrating to the new engine: wiredTiger when we didn't have enough storage, once we cleaned up some disk space we were able to go back and run this after the upgrade to 9.x: splunk migrate migrate-kvstore (for standalone nodes), you'll get a message like this if you run it manually:ĮRROR: Not enough space to upgrade KVStore, you will need requiredBytes=102776856576 bytes, but KV Store DB filesystem only has availableBytes=32339398656 $ splunk show kvstore-status -verbose |grep serverVersion Storage Engine hasn't been migrated to wireTiger. You will need requiredBytes=3107201024 bytes, but KV Store DB filesystem only has availableBytes=2286272512 Not enough space to upgrade KVStore (or backup). Migration is not required.Ĭreated version file path=/opt/splunk/var/run/splunk/kvstore_upgrade/versionFile40 Started standalone KVStore update, start_time=" 15:21:46". Starting migrate-kvstore.Ĭreated version file path=/opt/splunk/var/run/splunk/kvstore_upgrade/versionFile36 Lastly trying to understand the difference in the output of mongo versionsbetween kvstore-status command versus splunk cmd mongod -version, clearly pulling from two different places. The above link is for upgrading mongo in a cluster but not on a single instance, when looking at the options in splunk help kvstore I don't see anything for upgrading mongo either for a single instance, tried splunk start-shcluster-upgrade kvstore -version 4.2 -isDryRun true but of course it detected it wasn't a searchhead cluster. We have since fixed the disk space issue and were able to complete the engine migration to wiredTiger, however don't know how to bump up the mongo version to 4.2. ![]() During the Splunk Enterprise upgrade the migration to wiredTiger failed due to lack of disk space, the upgrade still continued and made the first hop of the mongo upgrade from version 3.6 to 4.0, it looks like after version 4.0 it tried to do the engine migration but couldn't because the lack of available disk space and therefore didn't do the last hop to version 4.2 of mongo. Looking to see how to upgrade mongo from 4.0 to 4.2 on a single instance deployment. Upgraded Splunk Enterprise version 9.0.0 from 8.2.5 ![]()
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