Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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None
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None
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None
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New
Description
Enhance UpgradeIndexMergePolicy to be a MergePolicy that can be used outside the scope the IndexUpgrader.
The enhancement aims to allow the UpgradeIndexMergePolicy to:
1) Delegate normal force merges to the underlying merge policy
2) Enable a flag that will explicitly tell UpgradeIndexMergePolicy when it should start looking for upgrades.
3) Allow new segments to be considered to be merged with old segments, depending on underlying MergePolicy.
4) Be configurable for backwards compatibility such that only segments needing an upgrade would be considered when merging, no explicit upgrades.
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