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google-cloud-storage-fuse

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Mounts Cloud Storage buckets on Google Cloud as a POSIX file system with Cloud Storage FUSE (gcsfuse). Use when interacting with gcsfuse or Cloud Storage FUSE mounts: decide whether FUSE, native gs:// reads, or Filestore/Managed Lustre fits a workload, deploy tuned mounts on GKE, Compute Engine, or Cloud Run, enable and size file, stat, and list caches, tune mount flags (--implicit-dirs) or config files, apply workload profiles, keep ML checkpointing safe (rename atomicity, hierarchical namespace/HNS, close-time finalization, concurrent writers), or diagnose slow training, low throughput, or bill spikes with gcsfuse metrics. Covers mount semantics, gcsfuse CLI and configs, GKE gcsfuse CSI driver (Workload Identity principal:// bindings, profile StorageClasses, sidecar sizing), and Cloud Run volume mounts. Don't use for bucket administration without a mount (google-cloud-storage-basics) or POSIX shared file systems (Filestore, Managed Lustre; use gke-storage).

skills/cloud/google-cloud-storage-fuse/SKILL.md

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Nov 7, 2026
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# Cloud Storage FUSE

Cloud Storage FUSE is a POSIX file-system adapter over Cloud Storage on Google
Cloud, operated via the gcsfuse CLI tool. Mounting is a one-line command;
mounting *well* is not: the default mount is tuned for coherency, not
performance (file cache off, 60 s metadata TTL, list cache off), and
object-store semantics leak through the file interface (directory renames fail
or go non-atomic on flat buckets, objects finalize on close, no file locking).
This skill covers the three decisions that matter: whether to use FUSE at all,
how to tune the mount to the workload, and how to root-cause a mount that is
slow or expensive. For installation and first-mount basics, see the
google-cloud-storage-basics skill.

## Attribution
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