Separate DeleteQueue to allow reusing only current-generation locators

[alexvru]

Changelog entry

Separate DeleteQueue to allow reusing only current-generation locators

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

This patch removes possibility for potential data race occuring with previous-generation agent trying to write blob that is being collected with fresh-generation BlobDepot (which may be reused and contain inconsistent data as a result).

[ydbot]

Run Extra Tests

Run additional tests for this PR. You can customize:

• Test Size: small, medium, large (default: all)
• Test Targets: any directory path (default: ydb/)
• Sanitizers: ASAN, MSAN, TSAN
• Coredumps: enable for debugging (default: off)
• Additional args: custom ya make arguments

[github-actions]

🟢 2025-12-06 14:47:58 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-12-06 14:48:48 UTC Pre-commit check linux-x86_64-relwithdebinfo for 632c457 has started.
⚪ 2025-12-06 14:49:04 UTC Artifacts will be uploaded here
⚪ 2025-12-06 14:51:13 UTC ya make is running...
🟡 2025-12-06 16:28:51 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
39899	36974	0	2	2902	21

⚪ 2025-12-06 16:29:03 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-12-06 16:41:29 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
44 (only retried tests)	27	0	1	0	16

⚪ 2025-12-06 16:41:35 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-12-06 16:50:46 UTC Tests successful.

Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
32 (only retried tests)	20	0	0	0	12

🟢 2025-12-06 16:50:52 UTC Build successful.
🟢 2025-12-06 16:51:12 UTC ydbd size 2.3 GiB changed* by -37.3 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 25029c1	merge: 632c457	diff	diff %
ydbd size	2 466 169 640 Bytes	2 466 131 448 Bytes	-37.3 KiB	-0.002%
ydbd stripped size	524 846 208 Bytes	524 837 696 Bytes	-8.3 KiB	-0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-12-06 14:49:06 UTC Pre-commit check linux-x86_64-release-asan for 632c457 has started.
⚪ 2025-12-06 14:49:23 UTC Artifacts will be uploaded here
⚪ 2025-12-06 14:51:27 UTC ya make is running...
🟡 2025-12-06 16:00:15 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12170	12097	0	56	7	10

🟢 2025-12-06 16:00:25 UTC Build successful.
🟢 2025-12-06 16:00:48 UTC ydbd size 3.8 GiB changed* by -50.3 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 25029c1	merge: 632c457	diff	diff %
ydbd size	4 127 824 880 Bytes	4 127 773 376 Bytes	-50.3 KiB	-0.001%
ydbd stripped size	1 532 696 344 Bytes	1 532 679 576 Bytes	-16.4 KiB	-0.001%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-12-06 21:42:25 UTC Pre-commit check linux-x86_64-relwithdebinfo for 8c2d43a has started.
⚪ 2025-12-06 21:42:43 UTC Artifacts will be uploaded here
⚪ 2025-12-06 21:44:56 UTC ya make is running...
🟡 2025-12-06 23:43:08 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
39903	36963	0	8	2905	27

⚪ 2025-12-06 23:43:21 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-12-06 23:55:27 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
60 (only retried tests)	46	0	0	0	14

🟢 2025-12-06 23:55:34 UTC Build successful.
🟢 2025-12-06 23:55:55 UTC ydbd size 2.3 GiB changed* by -37.2 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 34c1681	merge: 8c2d43a	diff	diff %
ydbd size	2 466 169 640 Bytes	2 466 131 592 Bytes	-37.2 KiB	-0.002%
ydbd stripped size	524 846 208 Bytes	524 837 760 Bytes	-8.2 KiB	-0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-12-06 21:42:32 UTC Pre-commit check linux-x86_64-release-asan for 8c2d43a has started.
⚪ 2025-12-06 21:42:48 UTC Artifacts will be uploaded here
⚪ 2025-12-06 21:44:59 UTC ya make is running...
🟡 2025-12-06 22:52:11 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12170	12090	0	66	7	7

🟢 2025-12-06 22:52:18 UTC Build successful.
🟢 2025-12-06 22:52:47 UTC ydbd size 3.8 GiB changed* by -49.8 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 34c1681	merge: 8c2d43a	diff	diff %
ydbd size	4 127 824 864 Bytes	4 127 773 824 Bytes	-49.8 KiB	-0.001%
ydbd stripped size	1 532 696 344 Bytes	1 532 679 768 Bytes	-16.2 KiB	-0.001%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[mregrock]

LGTM

[ydbot]

Backport

To backport this PR, click the button next to the target branch and then click "Run workflow" in the Run Actions UI.

Branch	Run
stable-25-2, stable-25-2-1, stable-25-3, stable-25-3-1
stable-25-3, stable-25-3-1
stable-25-3

[ydbot]

Backport results:

• stable-25-3: PR [Backport stable-25-3] PR #30261: Separate DeleteQueue to allow reusing only current-generation locators #30271
• stable-25-3-1: PR [Backport stable-25-3-1] PR #30261: Separate DeleteQueue to allow reusing only current-generation locators #30272

workflow run