* feat(ecstore): reclaim orphaned data dirs during heal (backlog #3231/#3191)
Pre-#3510, an unversioned overwrite leaked one UUID-named data dir per PUT.
The write path now cleans up going forward, but pre-existing strays stay on
disk forever: heal's dangling logic only removes whole objects whose data is
missing, never surplus data dirs of an otherwise-healthy object. That leaked
space is what eventually made ListObjects scan tens of GB and time out.
Add SetDisks::reclaim_orphan_data_dirs, a fail-closed, quorum-safe sweep that
mirrors purge_orphan_dir_object:
- referenced set is the UNION of get_data_dirs() across every online replica's
xl.meta, so a dir named by any replica is kept;
- if a disk holds the object dir but its xl.meta is missing or unparseable the
object is treated as degraded and nothing is removed;
- only UUID-named subdirectories are ever considered.
Wire it into heal_object's healthy tail (under the object write lock) as a
best-effort step so the background heal scanner and admin heal recover the
leaked space automatically; a reclaim failure never fails the heal.
Covered by four unit tests: removal of an unreferenced dir, no-op when all dirs
are referenced, fail-closed abort on missing metadata, and cross-replica union
preservation.
Co-Authored-By: heihutu <[email protected]>
* docs(ecstore): fix typo unparseable -> unparsable
Satisfies the repository typos CI check.
Co-Authored-By: heihutu <[email protected]>
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Co-authored-by: heihutu <[email protected]>
