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Chris LuandGitHub
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* volume: resolve the disk IO slow-latency threshold per disk volume.toml keys [volume.disk.io.slow.latency] by disk type, but the threshold was chosen once per server by switching on the raw -disk flag. -disk is comma-separated, one entry per -dir, so a multi-disk server matched no case and silently took the hdd threshold. Carry the table on DiskIOProbeConfig and resolve it in CheckDiskSpace from the location's own DiskType. A type with no entry keeps falling back to the hdd threshold. * volume: run the disk IO probe on multi-directory volume servers The probe was disabled whenever more than one -dir was configured, because a single server-wide slow-latency threshold could not describe disks of different types. The threshold is per disk now, and the rest of the probe already is: diskRegistry is keyed by directory, each DiskLocation runs its own CheckDiskSpace, and Store consults isDiskUnavailable per location. * volume: reject duplicate -dir entries Nothing deduplicated -dir, so the same directory listed twice produced two DiskLocations that each loaded every volume in it, appending to the same .dat under two independent locks. Compare directory identity with os.SameFile rather than the path, so a symlink or bind mount aliasing an earlier entry is rejected as well. * volume: cover the per-disk slow-latency handoff SlowLatencyFor has a test, but nothing asserted that CheckDiskSpace feeds it the location's own disk type. Probe through a seam so the resolved threshold is observable, and check hdd, ssd, nvme, the empty type, and an unlisted tag.