Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation by arthurpassos · Pull Request #743 · Altinity/ClickHouse

arthurpassos · 2025-04-17T19:47:37Z

Changelog category (leave one):

New Feature

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Cache for listobjects calls

Documentation entry for user-facing changes

src/Storages/Cache/ObjectStorageListObjectsCache.cpp

arthurpassos · 2025-04-18T12:01:37Z

arthur :) SELECT date, count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE date between '2025-01-01' and '2025-01-31'
GROUP BY date ORDER BY date
SETTINGS use_hive_partitioning=1, use_object_storage_list_objects_cache=0;

SELECT
    date,
    count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE (date >= '2025-01-01') AND (date <= '2025-01-31')
GROUP BY date
ORDER BY date ASC
SETTINGS use_hive_partitioning = 1, use_object_storage_list_objects_cache = 0

Query id: 29d096ab-0297-43a3-8844-b83b6a7856fb

    ┌─date───────┬─count()─┐
 1. │ 2025-01-01 │  292213 │
 2. │ 2025-01-02 │  402440 │
 3. │ 2025-01-03 │  409341 │
 4. │ 2025-01-04 │  432302 │
 5. │ 2025-01-05 │  433954 │
 6. │ 2025-01-06 │  366260 │
 7. │ 2025-01-07 │  352121 │
 8. │ 2025-01-08 │  399976 │
 9. │ 2025-01-09 │  534013 │
10. │ 2025-01-10 │  408769 │
11. │ 2025-01-11 │  361190 │
12. │ 2025-01-12 │  380525 │
13. │ 2025-01-13 │  408248 │
14. │ 2025-01-14 │  352684 │
15. │ 2025-01-15 │  354014 │
16. │ 2025-01-16 │  375439 │
17. │ 2025-01-17 │  425661 │
18. │ 2025-01-18 │  360666 │
19. │ 2025-01-19 │  388509 │
20. │ 2025-01-20 │  350291 │
21. │ 2025-01-21 │  324412 │
22. │ 2025-01-22 │  432369 │
23. │ 2025-01-23 │  326010 │
24. │ 2025-01-24 │  369243 │
25. │ 2025-01-25 │  338988 │
26. │ 2025-01-26 │  309651 │
27. │ 2025-01-27 │  332102 │
28. │ 2025-01-28 │  305953 │
29. │ 2025-01-29 │  355332 │
30. │ 2025-01-30 │  335134 │
31. │ 2025-01-31 │  328684 │
    └────────────┴─────────┘

31 rows in set. Elapsed: 4.080 sec. Processed 11.55 million rows, 0.00 B (2.83 million rows/s., 0.00 B/s.)
Peak memory usage: 3.17 MiB.

arthur :) SELECT date, count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE date between '2025-01-01' and '2025-01-31'
GROUP BY date ORDER BY date
SETTINGS use_hive_partitioning=1, use_object_storage_list_objects_cache=1;

SELECT
    date,
    count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE (date >= '2025-01-01') AND (date <= '2025-01-31')
GROUP BY date
ORDER BY date ASC
SETTINGS use_hive_partitioning = 1, use_object_storage_list_objects_cache = 1

Query id: 4afafbfb-eb93-4b96-8c4f-4a94f723805c

    ┌─date───────┬─count()─┐
 1. │ 2025-01-01 │  292213 │
 2. │ 2025-01-02 │  402440 │
 3. │ 2025-01-03 │  409341 │
 4. │ 2025-01-04 │  432302 │
 5. │ 2025-01-05 │  433954 │
 6. │ 2025-01-06 │  366260 │
 7. │ 2025-01-07 │  352121 │
 8. │ 2025-01-08 │  399976 │
 9. │ 2025-01-09 │  534013 │
10. │ 2025-01-10 │  408769 │
11. │ 2025-01-11 │  361190 │
12. │ 2025-01-12 │  380525 │
13. │ 2025-01-13 │  408248 │
14. │ 2025-01-14 │  352684 │
15. │ 2025-01-15 │  354014 │
16. │ 2025-01-16 │  375439 │
17. │ 2025-01-17 │  425661 │
18. │ 2025-01-18 │  360666 │
19. │ 2025-01-19 │  388509 │
20. │ 2025-01-20 │  350291 │
21. │ 2025-01-21 │  324412 │
22. │ 2025-01-22 │  432369 │
23. │ 2025-01-23 │  326010 │
24. │ 2025-01-24 │  369243 │
25. │ 2025-01-25 │  338988 │
26. │ 2025-01-26 │  309651 │
27. │ 2025-01-27 │  332102 │
28. │ 2025-01-28 │  305953 │
29. │ 2025-01-29 │  355332 │
30. │ 2025-01-30 │  335134 │
31. │ 2025-01-31 │  328684 │
    └────────────┴─────────┘

31 rows in set. Elapsed: 0.040 sec. Processed 11.55 million rows, 0.00 B (287.50 million rows/s., 0.00 B/s.)
Peak memory usage: 844.09 KiB.

arthur :)

arthurpassos · 2025-04-18T12:03:31Z

laptop@arthur:~/work/altinity/list_objects_cache$ ./cmake-build-release/programs/clickhouse benchmark -i 10 --cumulative -q "SELECT date, count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE date between '2025-01-01' and '2025-01-31'
GROUP BY date ORDER BY date
SETTINGS use_hive_partitioning=1, use_object_storage_list_objects_cache=0;"

Queries executed: 10.

localhost:9000, queries: 10, QPS: 0.389, RPS: 4487684.448, MiB/s: 0.000, result RPS: 12.049, result MiB/s: 0.000.

0%		2.363 sec.	
10%		2.379 sec.	
20%		2.382 sec.	
30%		2.391 sec.	
40%		2.402 sec.	
50%		2.410 sec.	
60%		2.410 sec.	
70%		2.451 sec.	
80%		2.458 sec.	
90%		3.159 sec.	
95%		3.212 sec.	
99%		3.212 sec.	
99.9%		3.212 sec.	
99.99%		3.212 sec.

laptop@arthur:~/work/altinity/list_objects_cache$ ./cmake-build-release/programs/clickhouse benchmark -i 10 --cumulative -q "SELECT date, count()
FROM s3('s3://aws-public-blockchain/v1.0/btc/transactions/*/*.parquet', NOSIGN)
WHERE date between '2025-01-01' and '2025-01-31'
GROUP BY date ORDER BY date
SETTINGS use_hive_partitioning=1, use_object_storage_list_objects_cache=1;"
Loaded 1 queries.

Queries executed: 10.

localhost:9000, queries: 10, QPS: 33.280, RPS: 384262109.406, MiB/s: 0.000, result RPS: 1031.666, result MiB/s: 0.028.

0%		0.015 sec.	
10%		0.015 sec.	
20%		0.015 sec.	
30%		0.016 sec.	
40%		0.017 sec.	
50%		0.017 sec.	
60%		0.017 sec.	
70%		0.018 sec.	
80%		0.018 sec.	
90%		0.018 sec.	
95%		0.018 sec.	
99%		0.018 sec.	
99.9%		0.018 sec.	
99.99%		0.018 sec.

:)

arthurpassos · 2025-04-18T13:44:32Z

src/Storages/Cache/ObjectStorageListObjectsCache.cpp

+    {
+        if (const auto it = cache.find(key); it != cache.end())
+        {
+            if (IsStaleFunction()(it->first))


This case is interesting. In case we find an exact match, but it has expired. Should we try to find a prefix match or simply update the entry?

Well, there can be a more up-to-date prefix entry, so why not try to reuse it

The only reason is that this entry would cease to exist. It would never be cached again. And it would become a linear search forever.

Actually, not forever, if the more up-to-date prefix entry gets evicted and this query is performed again, it would re-appear.

But I think you are right.

zvonand · 2025-04-18T14:00:38Z

src/Storages/ObjectStorage/StorageObjectStorageSource.cpp

+        {
+            throw Exception(
+                ErrorCodes::BAD_ARGUMENTS,
+                "Using glob iterator with path without globs is not allowed (used path: {})",


Shall not it be LOGICAL_ERROR ?
This looks like a branch of code where we cannot get normally (user does not select which iterator to use manually)

I agree, it should probably be LOGICAL_ERROR. But:

This is mostly a copy and paste from the existing GlobIterator.

I might refactor this to avoid duplication. For now, this is just a draft implementation.

Even if I refactor this, I would opt for keeping parity with existing code & upstream. This will make the review and merges with upsteam easier

…ear prefix matchin search

Enmk · 2025-04-18T17:47:49Z

src/Core/Settings.cpp

 - Positive integer.
 - 0 — All hosts in cluster.
+)", EXPERIMENTAL)                       \
+    DECLARE(Bool, use_object_storage_list_objects_cache, true, R"(


please add it to the src/Core/SettingsChangesHistory.cpp

Enmk · 2025-04-18T17:49:11Z

src/Storages/Cache/ObjectStorageListObjectsCache.cpp

+    cache.setMaxCount(count);
+}
+
+void ObjectStorageListObjectsCache::setTTL(std::size_t ttl_)


is it in seconds/miliseconds/minutes/hours?

In seconds, will modify the argument name

Enmk · 2025-04-18T21:25:21Z

src/Interpreters/InterpreterSystemQuery.cpp

            throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "The server was compiled without the support for Parquet");
+#endif
+        }
+        case Type::DROP_OBJECT_STORAGE_LIST_OBJECTS_CACHE:


Is caching works only on Parquet files or generally on any S3 ListObject requests?

Ah, copy and paste issues. Should be any :D

This reverts commit 0f5057e.

This reverts commit dd5934e.

This reverts commit 2ed102d.

This reverts commit 8e78b28.

This reverts commit e0e19a2.

This reverts commit d789d1e.

arthurpassos · 2025-05-06T20:09:36Z

The only functional difference from this version to the last reviewed one is that IObjectStorage::getDescription is now part of the cache key.

The reason for that is that we want to avoid collisions between different storage providers in the remote scenario where a bucket with the same name that contains the same directories exist in multiple object storage providers (i.e, aws s3, gcs and etc).

IObjectStorage::getDescription is implemented for the following classes:

S3ObjectStorage (implements AWS S3, GCS and Minio) - returns S3::URI::endpoint, examples below:

Input - s3://aws-public-blockchainn/v1.0/btc/transactions/**.parquet
Return - https://s3.amazonaws.com

Input - http://aws-public-blockchainn.s3.amazonaws.com/v1.0/btc/transactions/date=2025-01*/*.parquet
Return - http://s3.amazonaws.com

Input - https://storage.googleapiss.com/clickhouse-public-datasets/nyc-taxi/trips_{0..1}.gz
Return - https://storage.googleapiss.com

AzureObjectStorage' - returns AzureObjectStorage::description`

Input:
'DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://azurite1:10000/devstoreaccount1/;'

Return- http://azurite1:10000/devstoreaccount1/

Input:
http://azurite1:10000/devstoreaccount1

Return- http://azurite1:10000/devstoreaccount1

Input:
'BlobEndpoint=https://clickhousedocstest.blob.core.windows.net/;SharedAccessSignature=sp=r&st=2025-01-29T14:58:11Z&se=2025-01-29T22:58:11Z&spr=https&sv=2022-11-02&sr=c&sig=Ac2U0xl4tm%2Fp7m55IilWl1yHwk%2FJG0Uk6rMVuOiD0eE%3D'

Return- https://clickhousedocstest.blob.core.windows.net?se=2025-01-29T22:58:11Z&sig=Ac2U0xl4tm%2Fp7m55IilWl1yHwk%2FJG0Uk6rMVuOiD0eE%3D&sp=r&spr=https&sr=c&st=2025-01-29T14:58:11Z&sv=2022-11-02

HDFSObjectStorage - returns url

WebObjectStorage - returns url

LocalObjectStorage - returns blockid device?

The ones without example I have not had the time to test, I am sorry. Need to work on presentation for tomorrow.

… gcs, aws) and azure only. Leaving out HDFS, Local and Web

ianton-ru

LGTM

Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation

arthurpassos added 2 commits April 17, 2025 16:46

draft immpl

3dc33f3

remove garbage

7e182c7

arthurpassos changed the title ~~draft immpl~~ Cache the list objects operation on object storage using a TTL + prefix matching cache implementation Apr 17, 2025

arthurpassos added 3 commits April 17, 2025 17:01

use starts_with

ef985c9

fix a few obvious bugs

43c1383

some other fixes

989cfe0

arthurpassos force-pushed the list_objects_cache branch from 18592c1 to 989cfe0 Compare April 17, 2025 21:02

arthurpassos added 2 commits April 17, 2025 20:16

another fix

157450d

Merge branch 'antalya' into list_objects_cache

d4af4ae

arthurpassos commented Apr 18, 2025

View reviewed changes

src/Storages/Cache/ObjectStorageListObjectsCache.cpp Outdated Show resolved Hide resolved

arthurpassos commented Apr 18, 2025

View reviewed changes

src/Storages/Cache/ObjectStorageListObjectsCache.cpp Outdated Show resolved Hide resolved

arthurpassos commented Apr 18, 2025

View reviewed changes

src/Storages/Cache/ObjectStorageListObjectsCache.cpp Outdated Show resolved Hide resolved

arthurpassos mentioned this pull request Apr 18, 2025

Cache for ListObjects #744

Closed

arthurpassos added 2 commits April 18, 2025 10:37

remove unused method

727b64d

some other fixes

68cbad7

arthurpassos commented Apr 18, 2025

View reviewed changes

some other fixes

00f58b3

zvonand reviewed Apr 18, 2025

View reviewed changes

arthurpassos added 4 commits April 18, 2025 11:17

use steady_clock instead of system_clock

67ccaf0

small fixes

2b37e0c

Dont return null in case of exact match with stale entry, perform lin…

0d6e343

…ear prefix matchin search

add some metrics

0f605c4

svb-alt added the antalya-25.2.2 Planned for 25.2.2 release label Apr 18, 2025

Enmk reviewed Apr 18, 2025

View reviewed changes

implement cache clear command

3ed2349

Enmk reviewed Apr 18, 2025

View reviewed changes

remove ifdef from parquet

f345b33

arthurpassos added 10 commits May 6, 2025 10:48

Revert "remove unused code"

27c4dea

This reverts commit 0f5057e.

Revert "incorporate comments on tests"

d789d1e

This reverts commit dd5934e.

Revert "docs"

fef71c0

This reverts commit 2ed102d.

Revert "azure impl and fix aws"

6bfcb86

This reverts commit 8e78b28.

Revert "idraft impl of authorization aware cache"

f68725a

This reverts commit e0e19a2.

Merge branch 'antalya' into list_objects_cache

7597da0

Merge branch 'antalya' into list_objects_cache

e7940af

use description as part of the key

f863a6e

Reapply "incorporate comments on tests"

cbfe36d

This reverts commit d789d1e.

remove unused code

9092aba

arthurpassos added 2 commits May 7, 2025 10:29

add supportsListObjectsCache to enable this cache for s3-like (minio,…

057b0b5

… gcs, aws) and azure only. Leaving out HDFS, Local and Web

increase default cache size

49748c9

ianton-ru previously approved these changes May 7, 2025

View reviewed changes

fix weight funciton

96cf2d2

arthurpassos dismissed ianton-ru’s stale review via 96cf2d2 May 8, 2025 14:59

Enmk merged commit 60282da into antalya May 9, 2025
257 of 322 checks passed

vzakaznikov added antalya antalya-25.2 labels May 22, 2025

arthurpassos pushed a commit that referenced this pull request May 23, 2025

Merge pull request #743 from Altinity/list_objects_cache

e92ba19

Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation

arthurpassos pushed a commit that referenced this pull request May 23, 2025

Merge pull request #743 from Altinity/list_objects_cache

7fcb82a

Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation

arthurpassos pushed a commit that referenced this pull request May 23, 2025

Merge pull request #743 from Altinity/list_objects_cache

7d541da

Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation

hodgesrm mentioned this pull request May 23, 2025

Project Antalya Roadmap 2025 - Real-Time Data Lakes #804

Closed

31 tasks

arthurpassos mentioned this pull request May 23, 2025

25.3 Antalya port of #743 - Object storage list objects cache #805

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13 tasks

arthurpassos pushed a commit that referenced this pull request May 23, 2025

Merge pull request #743 from Altinity/list_objects_cache

62f5344

Antalya: Cache the list objects operation on object storage using a TTL + prefix matching cache implementation

svb-alt added antalya-25.6 port-antalya PRs to be ported to all new Antalya releases and removed antalya-25.6 labels Jul 14, 2025

Enmk mentioned this pull request Sep 9, 2025

Antalya 25.6: Ports of #938, #931, #1005, #933 #1007

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svb-alt removed the port-antalya PRs to be ported to all new Antalya releases label Feb 15, 2026

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arthurpassos commented Apr 17, 2025

Changelog category (leave one):

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Documentation entry for user-facing changes

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arthurpassos commented Apr 18, 2025

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Enmk Apr 18, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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arthurpassos commented May 6, 2025

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Enmk Apr 18, 2025 •

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