doc: add batch coprocessor rfc #39362
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docs/design/2022-11-23-batch-cop.md
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| Usually, the IndexLookUp executor may have an index worker which tries to read index keys and handles | ||
| according to the index filter conditions. Each time it fetches enough handle data, it would create a | ||
| coprocessor table task and send it to the table workers. The handle data size limit could be configured | ||
| by the [tidb_index_lookup_size](https://docs.pingcap.com/zh/tidb/dev/system-variables#tidb_index_lookup_size) |
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Use English link instead: https://docs.pingcap.com/tidb/dev/system-variables#tidb_index_lookup_size
docs/design/2022-11-23-batch-cop.md
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| by the [tidb_index_lookup_size](https://docs.pingcap.com/zh/tidb/dev/system-variables#tidb_index_lookup_size) | ||
| system variable. | ||
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| When the table worker gets a coprocessor task, it would split the handle ranges according to the region |
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| When the table worker gets a coprocessor task, it would split the handle ranges according to th�e region | |
| When the table worker gets a coprocessor task, it would split the handle ranges according to the region |
docs/design/2022-11-23-batch-cop.md
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| there are region errors or other errors processing batch tasks, rescheduling the cop tasks or | ||
| reporting errors to the upper layer. | ||
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| Note if the `keepOrder` is quired, the partial query result could not be sent back until all the reads |
docs/design/2022-11-23-batch-cop.md
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| … | ||
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| // Store the batched tasks belonging to other regions. | ||
| repeated region_tasks = 11; |
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The repeated type is missing.
docs/design/2022-11-23-batch-cop.md
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| message Response { | ||
| … | ||
| // The returned region error handling batch tasks. | ||
| repeated errorpb.Error region_errors = 13; |
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Need to collect errors with region id or task info. e.g., 100 region tasks request got 2 errors(the first and last), we need to tell TiDB which tasks need to be retried.
Codecov Report
Additional details and impacted files@@ Coverage Diff @@
## master #39362 +/- ##
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+ Coverage 70.5286% 73.4101% +2.8814%
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Files 1465 1056 -409
Lines 433686 335891 -97795
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- Hits 305873 246578 -59295
+ Misses 108604 73518 -35086
+ Partials 19209 15795 -3414 |
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/merge |
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Co-authored-by: Yilin Chen <[email protected]>
Co-authored-by: ekexium <[email protected]>
Co-authored-by: ekexium <[email protected]>
Co-authored-by: ekexium <[email protected]>
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What problem does this PR solve?
Issue Number: ref #39361
Problem Summary:
The design docuement.
What is changed and how it works?
Check List
Tests
Documentation
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