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Tree: 1ad25ba030

add-ec-vacuum

add_fasthttp_client

add_remote_storage

adding-message-queue-integration-tests

adjust-fsck-cutoff-default

also-delete-parent-directory-if-empty

avoid_releasing_temp_file_on_write

changing-to-zap

collect-public-metrics

copilot/fix-helm-chart-installation

copilot/fix-s3-object-tagging-issue

copilot/make-renew-interval-configurable

copilot/make-renew-interval-configurable-again

copilot/sub-pr-7677

create-table-snapshot-api-design

data_query_pushdown

dependabot/maven/other/java/client/com.google.protobuf-protobuf-java-3.25.5

dependabot/maven/other/java/examples/org.apache.hadoop-hadoop-common-3.4.0

detect-and-plan-ec-tasks

do-not-retry-if-error-is-NotFound

ec-disk-type-support

enhance-erasure-coding

fasthttp

feature/mini-port-detection

feature/modernize-s3-tests

filer1_maintenance_branch

fix-GetObjectLockConfigurationHandler

fix-bucket-name-case-7910

fix-mount-http-parallelism

fix-mount-read-throughput-7504

fix-pr-7909

fix-s3-object-tagging-issue-7589

fix-sts-session-token-7941

fix-versioning-listing-only

ftp

gh-pages

improve-fuse-mount

improve-fuse-mount2

logrus

master

message_send

mount2

mq-subscribe

mq2

nfs-cookie-prefix-list-fixes

optimize-delete-lookups

original_weed_mount

pr-7412

raft-dual-write

random_access_file

refactor-needle-read-operations

refactor-volume-write

remote_overlay

remove-implicit-directory-handling

revert-5134-patch-1

revert-5819-patch-1

revert-6434-bugfix-missing-s3-audit

s3-remote-cache-singleflight

s3-select

sub

tcp_read

test-reverting-lock-table

test_udp

testing

testing-sdx-generation

tikv

track-mount-e2e

upgrade-versions-to-4.00

volume_buffered_writes

worker-execute-ec-tasks

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dev

helm-3.65.1

v0.69

v0.70beta

v3.33

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seaweedfs/k8s/charts

History

chrislu 1ad25ba030 perf: optimize broker assignment validation to eliminate 14% CPU overhead CRITICAL: Assignment validation was running on EVERY LookupTopicBrokers call! Problem (from CPU profile): - ensureTopicActiveAssignments: 14.18% CPU (2.56s out of 18.05s) - EnsureAssignmentsToActiveBrokers: 14.18% CPU (2.56s) - ConcurrentMap.IterBuffered: 12.85% CPU (2.32s) - iterating all brokers - Called on EVERY LookupTopicBrokers request, even with cached config! Root Cause: LookupTopicBrokers flow was: 1. getTopicConfFromCache() - returns cached config (fast ✅) 2. ensureTopicActiveAssignments() - validates assignments (slow ❌) Even though config was cached, we still validated assignments every time, iterating through ALL active brokers on every single request. With 250 requests/sec, this meant 250 full broker iterations per second! Solution: Move assignment validation inside getTopicConfFromCache() and only run it on cache misses: Changes to broker_topic_conf_read_write.go: - Modified getTopicConfFromCache() to validate assignments after filer read - Validation only runs on cache miss (not on cache hit) - If hasChanges: Save to filer immediately, invalidate cache, return - If no changes: Cache config with validated assignments - Added ensureTopicActiveAssignmentsUnsafe() helper (returns bool) - Kept ensureTopicActiveAssignments() for other callers (saves to filer) Changes to broker_grpc_lookup.go: - Removed ensureTopicActiveAssignments() call from LookupTopicBrokers - Assignment validation now implicit in getTopicConfFromCache() - Added comments explaining the optimization Cache Behavior: - Cache HIT: Return config immediately, skip validation (saves 14% CPU!) - Cache MISS: Read filer -> validate assignments -> cache result - If broker changes detected: Save to filer, invalidate cache, return - Next request will re-read and re-validate (ensures consistency) Performance Impact: With 30-second cache TTL and 250 lookups/sec: - Before: 250 validations/sec × 10ms each = 2.5s CPU/sec (14% overhead) - After: 0.17 validations/sec (only on cache miss) - Reduction: 99.93% fewer validations Expected CPU Reduction: - Before (with cache): 18.05s total, 2.56s validation (14%) - After (with optimization): ~15.5s total (-14% = ~2.5s saved) - Combined with previous cache fix: 25.18s -> ~15.5s (38% total reduction) Cache Consistency: - Assignments validated when config first cached - If broker membership changes, assignments updated and saved - Cache invalidated to force fresh read - All brokers eventually converge on correct assignments Testing: - ✅ Compiles successfully - Ready to deploy and measure CPU improvement Priority: CRITICAL - Completes optimization of LookupTopicBrokers hot path		3 months ago
..
seaweedfs	Helm: allow specifying extraArgs for s3 (#7294)	3 months ago
artifacthub-repo.yml	Update artifacthub-repo-stable.yml (#4330)	3 years ago