* s3: fix remote object not caching
* s3: address review comments for remote object caching
- Fix leading slash in object name by using strings.TrimPrefix
- Return cached entry from CacheRemoteObjectToLocalCluster to get updated local chunk locations
- Reuse existing helper function instead of inline gRPC call
* s3/filer: add singleflight deduplication for remote object caching
- Add singleflight.Group to FilerServer to deduplicate concurrent cache operations
- Wrap CacheRemoteObjectToLocalCluster with singleflight to ensure only one
caching operation runs per object when multiple clients request the same file
- Add early-return check for already-cached objects
- S3 API calls filer gRPC with timeout and graceful fallback on error
- Clear negative bucket cache when bucket is created via weed shell
- Add integration tests for remote cache with singleflight deduplication
This benefits all clients (S3, HTTP, Hadoop) accessing remote-mounted objects
by preventing redundant cache operations and improving concurrent access performance.
Fixes: https://github.com/seaweedfs/seaweedfs/discussions/7599
* fix: data race in concurrent remote object caching
- Add mutex to protect chunks slice from concurrent append
- Add mutex to protect fetchAndWriteErr from concurrent read/write
- Fix incorrect error check (was checking assignResult.Error instead of parseErr)
- Rename inner variable to avoid shadowing fetchAndWriteErr
* fix: address code review comments
- Remove duplicate remote caching block in GetObjectHandler, keep only singleflight version
- Add mutex protection for concurrent chunk slice and error access (data race fix)
- Use lazy initialization for S3 client in tests to avoid panic during package load
- Fix markdown linting: add language specifier to code fence, blank lines around tables
- Add 'all' target to Makefile as alias for test-with-server
- Remove unused 'util' import
* style: remove emojis from test files
* fix: add defensive checks and sort chunks by offset
- Add nil check and type assertion check for singleflight result
- Sort chunks by offset after concurrent fetching to maintain file order
* fix: improve test diagnostics and path normalization
- runWeedShell now returns error for better test diagnostics
- Add all targets to .PHONY in Makefile (logs-primary, logs-remote, health)
- Strip leading slash from normalizedObject to avoid double slashes in path
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Co-authored-by: chrislu <chris.lu@gmail.com>
Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
