* 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.
Chris Lu
048f9ece2d