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[skip ci]Add sealed segment document (#9307) 

Signed-off-by: xiaofan-luan <xiaofan.luan@zilliz.com>
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Xiaofan 2021-10-05 23:08:28 +08:00 committed by GitHub
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docs/design_docs/segcore/segment_sealed.md Normal file
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# SegmentSealed
SegmentSealed has extra interface rather than segment_inferface:
1. `LoadIndex(loadIndexInfo)`: load the index. indexInfo containts
1. `FieldId`
2. `IndexParams`: index paramters in KV structure KV
3. `VecIndex`: vector index
2. `LoadFieldData(loadFieldDataInfo)`: Load column data, could be either scalar column or vector column
1. Note: indexes and vector data for the same column may coexist. Indexes are prioritized in search
3. `DropIndex(fieldId)`: drop and release exist index of specified field
4. `DropFieldData(fieldId)`: drop and release exist data for specified field
Search is executatble as long as all the column involved in the search are loaded.