perf(get,heal): land verified fixes for backlog #800-#804
Five fixes from the GET-path performance audit and scanner/heal
completeness audit (rustfs/backlog#800..#804), each verified locally:
- backlog#800 (heal checkpoint O(N^2)): ResumeCheckpoint object sets are
now HashSet (Vec::contains was O(n) per healed object; 1.5ms at n=1M
vs 11ns measured), and per-object checkpoint/resume-state persistence
is batched (1000 mutations / 5s) instead of rewriting the whole file
per object. complete_page() prunes the sets at page boundaries so
memory stays bounded; positions still persist unconditionally and
legacy Vec-format checkpoints still deserialize.
- backlog#801 (DiskInfo.healing never set): erasure-set heal now writes
a healing marker (.rustfs.sys/healing.bin) on the disks it rebuilds
(endpoints plumbed via HealRequest/HealTask.heal_endpoints from the
auto disk scanner) and clears it on success. LocalDisk::disk_info
surfaces the marker, so scanner heal coordination, lock selection and
admin/metrics healing counts see the rebuild.
- backlog#802 (cache probe after data read): new GetObjectBodyCacheHook
in ecstore lets the app-layer object data cache serve the body inside
get_object_reader, after metadata quorum resolution (etag known) but
before the erasure shard read/decode. Previously a hit still paid the
full disk read. Hook is None/no-op when the cache is disabled.
- backlog#803 (GET hot-path redundant work): ObjectInfo is cloned for
event notification only when an event will actually be built (GET and
HEAD paths; events are currently suppressed so the clone was pure
waste); get_opts/put_opts/del_opts resolve bucket versioning with one
metadata-sys lookup instead of two; skip_verify_bitrot and
get_lock_acquire_timeout env reads are cached via OnceLock; the
io-priority metric is no longer double-counted; GetObject input fields
are cloned selectively instead of cloning the whole input.
- backlog#804 (disk permit starvation): the disk-read permit wait is now
bounded (RUSTFS_OBJECT_DISK_PERMIT_WAIT_TIMEOUT, default 5s, 0 =
previous unbounded behavior); on timeout the GET proceeds without a
permit and the bypass is counted. DiskReadPermitReader also releases
the permit at body EOF instead of holding it until the client drops
the stream.
Verification: make pre-commit; cargo clippy -D warnings on the four
changed crates; full rustfs lib suite (2096 tests) green; rustfs-heal
lib suite green with new unit tests for checkpoint pruning/legacy
format/throttle, permit EOF release, and the cache hook (hit + SSE
skip). The heal_integration_test and one set_disk listing test fail
identically on unmodified main (pre-existing global-state ordering
flakes, verified via git stash A/B).
Co-authored-by: houseme <housemecn@gmail.com>
Zhengchao An