[fix](merge-on-write) segcompaction should process delete bitmap if necessary #38369
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TPC-H: Total hot run time: 39487 ms |
TPC-DS: Total hot run time: 171977 ms |
ClickBench: Total hot run time: 30.94 s |
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TPC-H: Total hot run time: 39742 ms |
TPC-DS: Total hot run time: 174282 ms |
ClickBench: Total hot run time: 30.2 s |
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dataroaring
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Aug 3, 2024
## Proposed changes Issue Number: close #xxx introduced by #38369
feiniaofeiafei
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Aug 9, 2024
…ecessary (apache#38369) ## Proposed changes Issue Number: close #xxx When loading data to a unique key table with sequence column, some data in current load job might be marked as delete due to a lower sequence value. If there's many segments in such load job, segcompaction might be triggered, which don't process the delete bitmap currently, will cause data correctness issue For example: 1. we have 4 segments in current load job initially, and due to seq column, some rows are marked as deleted 2. after segcompaction, if we don't process the delete bitmap, it's content is still corresponding to the old segment layout, and row 7,14,15 is not mark deleted correctly on new generated segment 1. 3. in this PR, we convert old delete bitmap to fit new segment layout, it use similar way as base/cumulative compaction to convert delete bitmaps on old layout to new one, but the rowid conversion is simpler 
dataroaring
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Aug 11, 2024
…ecessary (#38369) ## Proposed changes Issue Number: close #xxx When loading data to a unique key table with sequence column, some data in current load job might be marked as delete due to a lower sequence value. If there's many segments in such load job, segcompaction might be triggered, which don't process the delete bitmap currently, will cause data correctness issue For example: 1. we have 4 segments in current load job initially, and due to seq column, some rows are marked as deleted 2. after segcompaction, if we don't process the delete bitmap, it's content is still corresponding to the old segment layout, and row 7,14,15 is not mark deleted correctly on new generated segment 1. 3. in this PR, we convert old delete bitmap to fit new segment layout, it use similar way as base/cumulative compaction to convert delete bitmaps on old layout to new one, but the rowid conversion is simpler 
dataroaring
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Aug 11, 2024
## Proposed changes Issue Number: close #xxx introduced by #38369
dataroaring
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Aug 16, 2024
…ecessary (#38369) ## Proposed changes Issue Number: close #xxx When loading data to a unique key table with sequence column, some data in current load job might be marked as delete due to a lower sequence value. If there's many segments in such load job, segcompaction might be triggered, which don't process the delete bitmap currently, will cause data correctness issue For example: 1. we have 4 segments in current load job initially, and due to seq column, some rows are marked as deleted 2. after segcompaction, if we don't process the delete bitmap, it's content is still corresponding to the old segment layout, and row 7,14,15 is not mark deleted correctly on new generated segment 1. 3. in this PR, we convert old delete bitmap to fit new segment layout, it use similar way as base/cumulative compaction to convert delete bitmaps on old layout to new one, but the rowid conversion is simpler 
dataroaring
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Aug 16, 2024
## Proposed changes Issue Number: close #xxx introduced by #38369
zhannngchen
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Aug 21, 2024
…ecessary (apache#38369) Issue Number: close #xxx When loading data to a unique key table with sequence column, some data in current load job might be marked as delete due to a lower sequence value. If there's many segments in such load job, segcompaction might be triggered, which don't process the delete bitmap currently, will cause data correctness issue For example: 1. we have 4 segments in current load job initially, and due to seq column, some rows are marked as deleted 2. after segcompaction, if we don't process the delete bitmap, it's content is still corresponding to the old segment layout, and row 7,14,15 is not mark deleted correctly on new generated segment 1. 3. in this PR, we convert old delete bitmap to fit new segment layout, it use similar way as base/cumulative compaction to convert delete bitmaps on old layout to new one, but the rowid conversion is simpler 
zhannngchen
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Aug 21, 2024
## Proposed changes Issue Number: close #xxx introduced by apache#38369
yiguolei
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zhannngchen
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Aug 22, 2024
…ecessary (apache#38369) (apache#39707) Issue Number: close #xxx cherry-pick apache#38369 and apache#38800
zhannngchen
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mongo360
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…ecessary (apache#38369) (apache#39749) cherry-pick apache#38369 and apache#38800
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Proposed changes
Issue Number: close #xxx
When loading data to a unique key table with sequence column, some data in current load job might be marked as delete due to a lower sequence value.
If there's many segments in such load job, segcompaction might be triggered, which don't process the delete bitmap currently, will cause data correctness issue
For example: