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compact_log_backup: offload reading meta to diff cpus#18885

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YuJuncen:conc-read-meta
Aug 29, 2025
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compact_log_backup: offload reading meta to diff cpus#18885
ti-chi-bot[bot] merged 2 commits intotikv:masterfrom
YuJuncen:conc-read-meta

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@YuJuncen YuJuncen commented Aug 28, 2025

What is changed and how it works?

Issue Number: Close #18884

What's Changed:

This PR spawns read s3 file tasks to remote threads.

Related changes

  • PR to update pingcap/docs/pingcap/docs-cn:
  • Need to cherry-pick to the release branch

Check List

Tests

  • Unit test
  • Integration test
  • Manual test (add detailed scripts or steps below)
    Before:
{"level":"INFO","caller":"save_meta.rs:174","message":"Migration written.","time":"2025/08/26 08:15:25.388 +00:00","thread_id":1,"duration":"878.241073919s"}

After:

{"level":"INFO","caller":"save_meta.rs:174","message":"Migration written.","time":"2025/08/27 09:11:16.222 +00:00","thread_id":1,"duration":"521.078651373s"}
  • No code

Side effects

  • Performance regression: Consumes more CPU
  • Performance regression: Consumes more Memory
  • Breaking backward compatibility

Release note

None

@YuJuncen
try offload reading meta to diff cpus
f7e8b6e 
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
@ti-chi-bot ti-chi-bot bot added release-note-none Denotes a PR that doesn't merit a release note. dco-signoff: yes Indicates the PR's author has signed the dco. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Aug 28, 2025
@ti-chi-bot ti-chi-bot bot added the needs-1-more-lgtm Indicates a PR needs 1 more LGTM. label Aug 28, 2025
@YuJuncen
make clippy happy
7e859b8 
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
@ti-chi-bot ti-chi-bot bot added lgtm and removed needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels Aug 28, 2025
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ti-chi-bot bot commented Aug 28, 2025

[LGTM Timeline notifier]

Timeline:

  • 2025-08-28 08:27:24.601025128 +0000 UTC m=+428736.478856072: ☑️ agreed by 3pointer.
  • 2025-08-28 13:50:35.962404804 +0000 UTC m=+448127.840235758: ☑️ agreed by Leavrth.

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ti-chi-bot bot commented Aug 29, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3pointer, iosmanthus, Leavrth

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@ti-chi-bot ti-chi-bot bot added the approved label Aug 29, 2025
@ti-chi-bot ti-chi-bot bot merged commit 2d51d3e into tikv:master Aug 29, 2025
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@ti-chi-bot ti-chi-bot bot added this to the Pool milestone Aug 29, 2025
yibin87 pushed a commit to yibin87/tikv that referenced this pull request Sep 2, 2025
@YuJuncen @yibin87
compact_log_backup: offload reading meta to diff cpus (tikv#18885)
437aecd 
close tikv#18884

This PR spawns read s3 file tasks to remote threads.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
3AceShowHand pushed a commit to 3AceShowHand/tikv that referenced this pull request Oct 13, 2025
@YuJuncen @3AceShowHand
compact_log_backup: offload reading meta to diff cpus (tikv#18885)
777dcd6 
close tikv#18884

This PR spawns read s3 file tasks to remote threads.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
Signed-off-by: 3AceShowHand <jinl1037@hotmail.com>
YuJuncen added a commit to YuJuncen/tikv that referenced this pull request Dec 4, 2025
@YuJuncen
compact_log_backup: offload reading meta to diff cpus (tikv#18885)
f93f686 
close tikv#18884

This PR spawns read s3 file tasks to remote threads.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
YuJuncen added a commit that referenced this pull request Dec 4, 2025
@YuJuncen @RidRisR
@ti-chi-bot @3pointer @Leavrth
tikv-ctl: pick compact-log-bakcup (#19164)
c8d972b 
* br: batch download and merge download sst before ingest (#19062)

close #19086

Add a new PRC method called batch-download to download batch SST.

Signed-off-by: RidRisR <79858083+RidRisR@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* fix build

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* make format

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* implement the base library for compacting logs (#17632)

close #17631

Added a new crate named `compact-log-backup`. Now it can merge some log files generated by log backup and make them become SSTs.

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* added `compact-log-bakcup` to `tikv-ctl` (#17845)

close #17844

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: record `min_input_ts` and `max_input_ts` in Compaction (#18085)

close #18084

`min_input_ts` and `max_input_ts` will present in a log files compaction.

Signed-off-by: hillium <yu745514916@live.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: fix typo (#18090)

ref #15990

Fixed a typo: `Migartion` -> `Migration`.

Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: filter out meta files by migration (#18123)

close #18122

Now, `StreamMetaStorage` is able to filter out files by meta edits.

Signed-off-by: hillium <yu745514916@live.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: added minimal compactions size (#18235)

close #18234

Added `--minimal-compact-size` to `compact-log-backup`.

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* log backup: fix several issues during compact log backup.  (#18298)

close #18308

log backup compact: fix several issues during compact a log backup

Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: correct version assignment in subcompaction metadata (#18389)

close #18390

Fixed a bug that caused the time range of compaction generated SSTs are too huge.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: add new field to track fully compacted data KV files and fix metafile filtering (#18837)

close #18843

compact_log_backup: add new field to track fully compacted data KV files and fix metafile filtering

Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: use max ts among all storage checkpoint ts (#18848)

close #18847

Now, `consistency` hook checks the storage checkpoint by the max value among them.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: fix compact meta edit filter (#18842)

close #18843

Merge the same meta edit from different migrations instead of replacing.

Signed-off-by: Jianjun Liao <jianjun.liao@outlook.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: offload reading meta to diff cpus (#18885)

close #18884

This PR spawns read s3 file tasks to remote threads.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: read meta from checkpoint (#19068)

close #19069

This PR makes `compact-log-backup` fills the migration with subcompactions skipped by checkpoint.

Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* fix build

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

---------

Signed-off-by: RidRisR <79858083+RidRisR@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Jianjun Liao <jianjun.liao@outlook.com>
Signed-off-by: 山岚 <36239017+YuJuncen@users.noreply.github.com>
Co-authored-by: ris <79858083+RidRisR@users.noreply.github.com>
Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Co-authored-by: 3pointer <luancheng@pingcap.com>
Co-authored-by: Jianjun Liao <36503113+Leavrth@users.noreply.github.com>
YuJuncen added a commit to YuJuncen/tikv that referenced this pull request Dec 5, 2025
@YuJuncen @RidRisR
@ti-chi-bot @3pointer @Leavrth
tikv-ctl: pick compact-log-bakcup (tikv#19164)
53fca27 
* br: batch download and merge download sst before ingest (tikv#19062)

close tikv#19086

Add a new PRC method called batch-download to download batch SST.

Signed-off-by: RidRisR <79858083+RidRisR@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* fix build

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* make format

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* implement the base library for compacting logs (tikv#17632)

close tikv#17631

Added a new crate named `compact-log-backup`. Now it can merge some log files generated by log backup and make them become SSTs.

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* added `compact-log-bakcup` to `tikv-ctl` (tikv#17845)

close tikv#17844

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: record `min_input_ts` and `max_input_ts` in Compaction (tikv#18085)

close tikv#18084

`min_input_ts` and `max_input_ts` will present in a log files compaction.

Signed-off-by: hillium <yu745514916@live.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: fix typo (tikv#18090)

ref tikv#15990

Fixed a typo: `Migartion` -> `Migration`.

Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: filter out meta files by migration (tikv#18123)

close tikv#18122

Now, `StreamMetaStorage` is able to filter out files by meta edits.

Signed-off-by: hillium <yu745514916@live.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: added minimal compactions size (tikv#18235)

close tikv#18234

Added `--minimal-compact-size` to `compact-log-backup`.

Signed-off-by: hillium <yujuncen@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* log backup: fix several issues during compact log backup.  (tikv#18298)

close tikv#18308

log backup compact: fix several issues during compact a log backup

Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: correct version assignment in subcompaction metadata (tikv#18389)

close tikv#18390

Fixed a bug that caused the time range of compaction generated SSTs are too huge.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: add new field to track fully compacted data KV files and fix metafile filtering (tikv#18837)

close tikv#18843

compact_log_backup: add new field to track fully compacted data KV files and fix metafile filtering

Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: use max ts among all storage checkpoint ts (tikv#18848)

close tikv#18847

Now, `consistency` hook checks the storage checkpoint by the max value among them.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: fix compact meta edit filter (tikv#18842)

close tikv#18843

Merge the same meta edit from different migrations instead of replacing.

Signed-off-by: Jianjun Liao <jianjun.liao@outlook.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: offload reading meta to diff cpus (tikv#18885)

close tikv#18884

This PR spawns read s3 file tasks to remote threads.

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* compact_log_backup: read meta from checkpoint (tikv#19068)

close tikv#19069

This PR makes `compact-log-backup` fills the migration with subcompactions skipped by checkpoint.

Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

* fix build

Signed-off-by: Juncen Yu <yujuncen@pingcap.com>

---------

Signed-off-by: RidRisR <79858083+RidRisR@users.noreply.github.com>
Signed-off-by: Juncen Yu <yujuncen@pingcap.com>
Signed-off-by: hillium <yu745514916@live.com>
Signed-off-by: 3pointer <luancheng@pingcap.com>
Signed-off-by: Jianjun Liao <jianjun.liao@outlook.com>
Signed-off-by: 山岚 <36239017+YuJuncen@users.noreply.github.com>
Co-authored-by: ris <79858083+RidRisR@users.noreply.github.com>
Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Co-authored-by: 3pointer <luancheng@pingcap.com>
Co-authored-by: Jianjun Liao <36503113+Leavrth@users.noreply.github.com>
@YuJuncen YuJuncen mentioned this pull request Dec 5, 2025
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@iosmanthus iosmanthus iosmanthus approved these changes

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compact_log_backup: read meta is slow due to the single threaded execution

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