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How to avoid the split-brain problem in elasticsearch
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If you have concerns regarding your your current elasticsearch configuration or would like some help starting a new elasticsearch project, we are always ready to help, just contact us. Your post is about how to avoid split brain, but it real does not since that issue still exists. Thank you for your comment. Fortunately the split brain occurrences are much rarer in the newer versions of elasticsearch because of improvements in garbage collection. During my testing, despite trying numerous configuration settings, the split-brain condition could never be completely eliminated.
Starting nodes simultaneously often yielded split-brain. When nodes were started serially with a delay 5 seconds in my case between node start-up, split-brain rarely occurred.
Ryoji Ikeda | Exposition | Eye
My suggestion: have logic that orchestrates ElasticSearch node start-up, and have such logic ensure there exists an appropriate delay between starting ElasticSearch nodes. The common scenario is when the 2 nodes stop responding to each other via pings.
IMO, there is a valid use case to have 2 separate clusters with 1 node each, instead of a 3-node cluster. This resolves the problems with split-brain, as well as high availability but you need some sort of heartbeat to determine when to stop querying one of the nodes.
4 HOURS - 1 DAY
Now what if one of the cluster dies.. Yes, temporarily, but you see most indexing ES APIs throw an exception if the cluster is down and you try to index data in it.
Thus split brain resolves itself soon after the cluster comes back up. Also, in many cases you may encounter problems with a cluster if you mess up the configuration in production. Do u wanna deal with that scenario or just quickly change a flag, and make all queries go to a secondary cluster?
What is split-brain? How to avoid the split-brain problem The elasticsearch configuration has excellent defaults. Two node cluster?
Brains, Behaviours and PSED
In conclusion The split-brain problem is apparently difficult to solve permanently. Puppet from the trenches — How to prevent overwritten user configuration with a custom type. Apportable a much better alternative to Phonegap and AFNetworking 2.
Related AMSTERDAM MIND SCENARIO
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