With gcsfuse, how much remaining space is available in a bucket when mounted?

Question

I'm about to evaluate gcsfuse for use in a system with a database daemon. The daemon is peculiar. It computes its usable available disk space subtactively, rather than additively; that is, it ensures that it uses all of the available space, except for a reserved portion of disk.

GSE documentation suggests that storage is indefinitely large, which I assume means that the "disk" size of the bucket will appear as some ridiculous or unexpected number. What actually happens? Is there a way to instruct the gcsfuse binary to set a maximum bucket size?

score 1 · Accepted Answer · answered Sep 26 '16 at 01:45

1

Assuming the database uses statfs to find free space, gcsfuse simulates 1 PiB of free space. (This is not guaranteed in the documentation anywhere and is subject to change.)

There are tests that confirms this works on macOS and linux.

answered Sep 26 '16 at 01:45

jacobsa

439
3
11

Reproduced this on NixOS, my target platform. Thanks for the detailed answer. – Corbin Sep 26 '16 at 14:34

With gcsfuse, how much remaining space is available in a bucket when mounted?

1 Answers1