4 Commits

Include renames

Author	SHA1	Message	Date
Chris Lu	c015cc3939	generate vtproto marshalers for filer_pb and use them on the metadata log path (#10337) ... * generate vtproto marshalers for filer_pb and use them on the metadata log path Reflection-based proto.Unmarshal allocates a fresh message tree through reflect.New on every call. On the metadata subscription fan-out the same event is decoded once per subscriber, so reflect.New tops the decode churn under many mounts. Generate MarshalVT/UnmarshalVT/SizeVT for filer.proto (a separate filer_vtproto.pb.go, filer.pb.go untouched) and call them on the log entry marshal and the subscribe/replay decode paths. UnmarshalVT allocates message structs directly and copies byte and string fields, so it stays wire-compatible with proto.Unmarshal and preserves the non-aliasing the persisted-log cache depends on. For SubscribeMetadataResponse this cuts decode allocations 69 -> 50 and ~4.5us -> ~2.1us per event; the win scales with subscriber overlap. * marshal log entries directly into the buffer SizeVT is allocation-free and MarshalToSizedBufferVT writes into a pre-sized slice, so the log entry can be marshaled straight into logBuffer.buf. This drops the per-entry MarshalVT allocation and the follow-up copy on the write path. * expand vtproto benchmarks: marshal, decode, and marshal-into-buffer by chunk count Parametrize by nested-message count (chunks per event) and add encode + zero-alloc marshal-into-buffer benchmarks alongside the decode one, so the write-path win from MarshalToSizedBufferVT is measurable too. * keep proto.Unmarshal for metadata events to preserve UTF-8 validation UnmarshalVT skips proto3's UTF-8 validation of string fields, so a SubscribeMetadataResponse with an invalid-UTF-8 string (e.g. Directory "\xff") that proto.Unmarshal rejects would decode and reach path filtering and subscribers. Decode events with proto.Unmarshal again; UnmarshalVT stays on the log entry paths, whose only variable-length fields are bytes and so carry no UTF-8 constraint. Tests cover the codec difference and that a malformed event is skipped before delivery.	2026-07-15 02:32:05 -07:00
Chris Lu	9b1ff91949	filer: stream offloaded metadata-log entries to fix concurrent-write OOM (#10203) ... * filer: stream offloaded metadata-log entries instead of buffering whole files The client metadata-chunks read path (ReadLogFileRefs, used by the meta aggregator to consume peer filers and by mounts) decoded every entry of a log file into a slice before handing it to the consumer, and prefetched the next whole file the same way. Peak memory scaled with log-file size: under heavy concurrent writes the per-event chunk lists grow and minute-files reach hundreds of MB to GBs, so a filer aggregating a few peers held many GBs of decoded entries at once (heap dominated by readLogFileEntries -> consumeBytesNoZero) and OOMed. Stream entries through a bounded channel: a producer decodes one entry at a time and the next file's read overlaps processing via the channel buffer, so peak memory is bounded by the channel depth rather than O(file size). In a synthetic replay peak live heap dropped from ~1.3x the file size to a flat few MB regardless of file size. * filer: tighten offload replay tests Share one ordered-replay assertion between the merge-order and single-filer tests, assert the callback's own error is what propagates, and drop atomic counters from callbacks that run on a single goroutine. * filer: abort offloaded log replay promptly instead of joining wedged readers Collapse the single-filer fast path into the merged reader: it was a second copy of the producer/stop lifecycle with its own subtler synchronization, and a one-stream merge does the same job. On abort (processing error or a fatal read error from one filer), the consumer used to drain channels and join every producer. A producer blocked in an uncancellable chunk read cannot observe stop until that read returns, so an abort could stall the caller's retry loop behind a dead volume-server connection. Closing stop is now the only cleanup: producers check it at every send and file boundary and exit on their own, and the merge loop's blocking receives also escape on stop. Producers also check stop before opening each file, so an aborted replay no longer keeps reading remaining files whose entries never reach the channel. A mid-file chunk-not-found still skips to the next file, but the log line now reports how many entries were delivered first instead of pretending the whole file was skipped; the redundant error log before setFatal is gone since the error propagates to callers that already log it. * filer: cap offloaded log entry allocation against corrupt size prefix A garbage 4-byte size prefix (torn chunk or stream desync) drove make([]byte, size) up to 4GiB per entry. Reject sizes above the same 1GiB bound the filer-side log readers enforce.	2026-07-02 12:34:03 -07:00
Chris Lu	048f9ece2d	Fix filer metadata-replay OOM under mount reconnect storms (#9901) ... * fix(filer): propagate multi-filer metadata log read errors A genuine (non not-found) read error in one filer's log stream was logged and skipped, then the merged cursor advanced past the gap, silently dropping that file's events. Abort the whole replay so the subscriber re-reads from the unchanged position; chunk-not-found still skips. * perf(mount): read persisted metadata log chunks directly from volume servers Set LogFileReaderFn so the filer returns log file references and the mount reads the chunk data itself, instead of the filer reading, decoding, and streaming every persisted entry. Keeps a reconnect storm of many mounts from concentrating hundreds of concurrent log replays in filer memory. * perf(filer): pre-size chunk stream reader buffer to view size The chunk size is known up front, so grow the buffer once instead of letting bytes.Buffer double as the streamed pieces arrive (which transiently overshoots to ~2x per reader). * fix(filer): bound concurrent persisted-log replays Each server-side replay holds an open chunk reader per source filer plus a readahead buffer, so a reconnect storm of clients that predate the metadata-chunks offload multiplies into many GB. Gate replays with a semaphore; abort the acquire when the subscriber's stream is gone so cancelled clients do not pile up parked goroutines.	2026-06-09 11:43:12 -07:00
Chris LuandCopilot	c2c58419b8	filer.sync: send log file chunk fids to clients for direct volume server reads (#8792) ... * filer.sync: send log file chunk fids to clients for direct volume server reads Instead of the server reading persisted log files from volume servers, parsing entries, and streaming them over gRPC (serial bottleneck), clients that opt in via client_supports_metadata_chunks receive log file chunk references (fids) and read directly from volume servers in parallel. New proto messages: - LogFileChunkRef: chunk fids + timestamp + filer ID for one log file - SubscribeMetadataRequest.client_supports_metadata_chunks: client opt-in - SubscribeMetadataResponse.log_file_refs: server sends refs during backlog Server changes: - CollectLogFileRefs: lists log files and returns chunk refs without any volume server I/O (metadata-only operation) - SubscribeMetadata/SubscribeLocalMetadata: when client opts in, sends refs during persisted log phase, then falls back to normal streaming for in-memory events Client changes: - ReadLogFileRefs: reads log files from volume servers, parses entries, filters by path prefix, invokes processEventFn - MetadataFollowOption.LogFileReaderFn: factory for chunk readers, enables metadata chunks when non-nil - Both filer_pb_tail.go and meta_aggregator.go recv loops accumulate refs then process them at the disk→memory transition Backward compatible: old clients don't set the flag, get existing behavior. Ref: #8771 * filer.sync: merge entries across filers in timestamp order on client side ReadLogFileRefs now groups refs by filer ID and merges entries from multiple filers using a min-heap priority queue — the same algorithm the server uses in OrderedLogVisitor + LogEntryItemPriorityQueue. This ensures events are processed in correct timestamp order even when log files from different filers have interleaved timestamps. Single-filer case takes the fast path (no heap allocation). * filer.sync: integration tests for direct-read metadata chunks Three test categories: 1. Merge correctness (TestReadLogFileRefsMergeOrder): Verifies entries from 3 filers are delivered in strict timestamp order, matching the server-side OrderedLogVisitor guarantee. 2. Path filtering (TestReadLogFileRefsPathFilter): Verifies client-side path prefix filtering works correctly. 3. Throughput comparison (TestDirectReadVsServerSideThroughput): 3 filers × 7 files × 300 events = 6300 events, 2ms per file read: server-side: 6300 events 218ms 28,873 events/sec direct-read: 6300 events 51ms 123,566 events/sec (4.3x) parallel: 6300 events 17ms 378,628 events/sec (13.1x) Direct-read eliminates gRPC send overhead per event (4.3x). Parallel per-filer reading eliminates serial file I/O (13.1x). * filer.sync: parallel per-filer reads with prefetching in ReadLogFileRefs ReadLogFileRefs now has two levels of I/O overlap: 1. Cross-filer parallelism: one goroutine per filer reads its files concurrently. Entries feed into per-filer channels, merged by the main goroutine via min-heap (same ordering guarantee as the server's OrderedLogVisitor). 2. Within-filer prefetching: while the current file's entries are being consumed by the merge heap, the next file is already being read from the volume server in a background goroutine. Single-filer fast path avoids the heap and channels. Test results (3 filers × 7 files × 300 events, 2ms per file read): server-side sequential: 6300 events 212ms 29,760 events/sec parallel + prefetch: 6300 events 36ms 177,443 events/sec Speedup: 6.0x * filer.sync: address all review comments on metadata chunks PR Critical fixes: - sendLogFileRefs: bypass pipelinedSender, send directly on gRPC stream. Ref messages have TsNs=0 and were being incorrectly batched into the Events field by the adaptive batching logic, corrupting ref delivery. - readLogFileEntries: use io.ReadFull instead of reader.Read to prevent partial reads from corrupting size values or protobuf data. - Error handling: only skip chunk-not-found errors (matching server-side isChunkNotFoundError). Other I/O or decode failures are propagated so the follower can retry. High-priority fixes: - CollectLogFileRefs: remove incorrect +24h padding from stopTime. The extra day caused unnecessary log file refs to be collected. - Path filtering: ReadLogFileRefs now accepts PathFilter struct with PathPrefix, AdditionalPathPrefixes, and DirectoriesToWatch. Uses util.Join for path construction (avoids "//foo" on root). Excludes /.system/log/ internal entries. Matches server-side eachEventNotificationFn filtering logic. Medium-priority fixes: - CollectLogFileRefs: accept context.Context, propagate to ListDirectoryEntries calls for cancellation support. - NewChunkStreamReaderFromLookup: accept context.Context, propagate to doNewChunkStreamReader. Test fixes: - Check error returns from ReadLogFileRefs in all test call sites. --------- Co-authored-by: Copilot <copilot@github.com>	2026-03-27 11:01:29 -07:00