Add multi data.path to migration guide #10770
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| elasticsearch will upgrade shards into a single data location on first node startup. In the case where | ||
| there is not enough disk space to upgrade the node the upgarde is canceled and can only be resumed onces | ||
| enough disk space is abvailable to copy the shard to upgrade. | ||
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=== Multiple data.path striping
Previously, if the `data.path` setting listed multiple data paths, then a
shard would be ``striped'' across all paths by writing a whole file to each
path in turn (in accordance with the `index.store.distributor` setting). The
result was that the files from a single segment in a shard could be spread
across multiple disks, and the failure of any one disk could corrupt multiple
shards.
This striping is no longer supported. Instead, different shards may be
allocated to different paths, but all of the files in a single shard will be
written to the same path.
If striping is detected while starting Elasticsearch 2.0.0 or later, all of
the files belonging to the same shard will be migrated to the same path. If
there is not enough disk space to complete this migration, the upgrade will be
cancelled and can only be resumed once enough disk space is made available.
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The `index.store.distributor` setting has also been removed.
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@clintongormley pushed a new commit |
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LGTM |
this commit removes the obsolete settings for distributors and updates the documentation on multiple data.path. It also adds an explain to the migration guide. Relates to elastic#9498 Closes elastic#10770
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this commit removes the obsolete settings for distributors and updates
the documentation on multiple data.path. It also adds an explain to the
migration guide.