Is all disk space shown with `df -h` available to gcp batch?

[vedantroy-genmo]

When running `df -h`, on a GCP batch VM, I see the following:

```

Filesystem Size Used Avail Use% Mounted on

2024-05-09 12:18:05.691 PDT

overlay 28G 3.1G 25G 12% /

```

Does this mean, I have around 25G of scratch space on a GCP batch VM, or ... is the container restricted to only use a small portion of this space?