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qdrant-cloud-bot d75d805533 Strict mode: add max_disk_usage_percent (#9212)
* Strict mode: add `max_disk_usage_percent`

Mirrors `max_resident_memory_percent`: rejects disk-consuming update ops
(upsert, set/overwrite payload, update vectors) when the filesystem hosting
Qdrant storage is filled above the configured percentage. Delete-style ops
remain allowed so callers can free disk.

Disk usage is sampled via `statvfs` and TTL-cached for 5s (same cadence as
the resident-memory reader) so high-RPS request paths don't hammer the
syscall. Reader is keyed by path in `common::disk_usage` and returns `None`
on stat failure — callers (the strict-mode check) treat `None` as "skip",
matching the memory-check behaviour.

Plumbing follows the existing pattern: field on `StrictModeConfig` (+
output/diff/Hash), gRPC proto field `22`, validation 1..=100, REST/proto
conversions, and the hook into `check_strict_mode_toc_batch` alongside the
memory check (both guarded by `any_consumes_memory`).

Co-authored-by: Cursor <cursoragent@cursor.com>

* Fix CI: Windows disk_usage test + e2e WAL config

- `missing_path_returns_none` panicked on Windows because
  `GetDiskFreeSpaceEx` succeeds for non-existent paths (it resolves up to
  the containing drive). Relax the assertion to "must not panic; if a
  value is returned it must be well-formed". The contract we care about
  (None on failure) is platform-defined, not something we can portably
  force.

- e2e test failed at batch 0 with "WAL buffer size exceeds available disk
  space": Qdrant's existing per-shard `DiskUsageWatcher` enforces
  `free >= 2 * wal_capacity_mb` and the default WAL didn't fit in the
  50 MB tmpfs. Bump tmpfs to 200 MB and shrink `wal_capacity_mb` to 1 MB
  (same pattern as `test_low_disk.py`) so our strict-mode gate is the
  one that fires, not the WAL pre-check. Raise the gate threshold to
  50% to match the larger headroom.

Co-authored-by: Cursor <cursoragent@cursor.com>

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Co-authored-by: Cursor <cursoragent@cursor.com>
2026-06-03 14:54:03 +02:00
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