feat(meta): commit epoch in separate group delta #18893
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wenym1
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ci/run-backwards-compat-tests
zwang28
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Oct 18, 2024
| sst_slice.iter() | ||
| self.newly_added_sst_infos(None) | ||
| .map(|sst| { | ||
| // TODO: should we instead use sst.sst_id? |
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zwang28
reviewed
Oct 18, 2024
| if let Some(destroy_group_id) = &group_destroy { | ||
| self.levels.remove(destroy_group_id); | ||
| if is_l0_changed && let Some(levels) = self.levels.get_mut(compaction_group_id) { | ||
| levels.update_l0(); |
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I think update_l0 is only need by apply_compact_ssts, because whenever insert_new_sub_level the stats of l0 has already been maintained incrementally.
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| 9425213 | Triggered | Generic Password | c01749b | ci/scripts/e2e-source-test.sh | View secret |
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What's changed and what's your intention?
In #18886, we changed to generate a new sub level id in
apply_version_delta. However, it makes the semantic of fieldsub_level_idinIntraLevelDeltaobscure: it means to generate a new sub level id for delta generated fromcommit_epoch, but means the target sub level id to insert for delta generated fromreport_compact_task. In other words, the field is shared bycommit_epochandreport_compact_task, but has different semantics under the two sources, which is error-prone.In this PR, we change to add a separate group delta named
NewL0SubLevel, which contains only the new SSTs to insert. Inapply_version_delta, forIntraLevelDelta, we change back to still using itssub_level_id, and forNewL0SubLevel, we generate a new sub level id for it.We also refactor the code of
apply_version_delta. Previously we had to callsummarize_version_deltasto generate a summary on a list of version deltas, and then apply the summary to the hummock version. This is actually unnecessary. In this PR, we change to apply the list of version deltas one by one.Checklist
./risedev check(or alias,./risedev c)Documentation
Release note
If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.