Andrey Mashenkov created IGNITE-19687:
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Summary: Support default distribution zone reassignment.
Key: IGNITE-19687
URL: https://issues.apache.org/jira/browse/IGNITE-19687
Project: Ignite
Issue Type: Improvement
Reporter: Andrey Mashenkov
*Motivation.*
We have no reasonable arguments that we need a special distribution zone
instance. All distribution zones are equals. Thus, conceptually, any zone can
be used as default one and can be renamed.
For better UX, we still can require at least one distribution zone, which is
currently assigned as default zone, must always exists.
Let's
* Avoid using any hardcoded zone id or zone name for getting or detecting the
default distribution zone.
* Distributed zone manager shouldn't care which zone is default. Catalog will
be responsible for resolving default zone if it is not specified when table is
creating.
* Add a property in Configuration that will to default zone by zone id.
* A distribution zone with name "Default"(?) and some default parameters must
be created on cluster initialization phase and an id, which was assigned to
such zone, must be stored to Configuration.
* Forbid dropping of distribution zone, which is currently marked as default.
* Add support {{ALTER ZONE <zone_name> SET DEFAULT}} to reassign default zone.
* Allow renaming for all zones.
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