32 lines
1.5 KiB
Plaintext
32 lines
1.5 KiB
Plaintext
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[testenv="platinum"]
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If your {ml} indices were created earlier than the previous major version, they
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must be reindexed. In those circumstances, there must be no machine learning
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jobs running during the upgrade.
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In all other circumstances, there is no requirement to close your {ml} jobs.
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There are, however, advantages to doing so. If you choose to leave your jobs
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running during the upgrade, they are affected when you stop the {ml} nodes. The
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jobs move to another {ml} node and restore the model states. This scenario has
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the least disruption to the active {ml} jobs but incurs the highest load on the
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cluster.
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To close all {ml} jobs before you upgrade, see
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{stack-ov}/stopping-ml.html[Stopping {ml}]. This method persists the model
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state at the moment of closure, which means that when you open your jobs after
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the upgrade, they use the exact same model. This scenario takes the most time,
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however, especially if you have many jobs or jobs with large model states.
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To temporarily halt the tasks associated with your {ml} jobs and {dfeeds} and
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prevent new jobs from opening, use the <<ml-set-upgrade-mode,set upgrade mode API>>:
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[source,js]
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--------------------------------------------------
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POST _ml/set_upgrade_mode?enabled=true
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--------------------------------------------------
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// CONSOLE
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This method does not persist the absolute latest model state, rather it uses the
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last model state that was automatically saved. By halting the tasks, you avoid
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incurring the cost of managing active jobs during the upgrade and it's quicker
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than stopping {dfeeds} and closing jobs.
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