Ephemeral Storage

Every container on Bahriya ships with a small amount of fast, local scratch space called ephemeral storage. It's automatically attached to every replica with no setup required — you write files to the container's filesystem and they go here.

How it works

• Every container gets 3 GB of ephemeral storage for free.
• You can increase the size up to 10 GB per pod in 1 GB steps.
• The first 3 GB are always included at no charge. Anything beyond 3 GB is billed at $0.10 per GB per month, billed per minute.

What it's for

Ephemeral storage is a good fit for:

• Temporary files your application writes while a request is in flight.
• Cached build artefacts.
• Temporary upload buffers that you then push to object storage.
• Anything you would have written to /tmp on a regular server.

What you need to know

Ephemeral storage is, as the name suggests, ephemeral. It lives only for the lifetime of the pod. When a replica restarts, scales away, or is rescheduled, everything in its ephemeral storage is gone. This is by design — ephemeral storage is fast and local, and the trade-off for that speed is that it isn't durable.

If you need data that survives restarts, use persistent storage instead.

Choosing a size

Start with the 3 GB default. If your container is restarted because it ran out of disk (you'll see an Evicted: DiskPressure event), increase the size in 1 GB increments until the restarts stop. There is no need to over-provision — you only pay for what you set.

Billing

• First 3 GB: free.
• Each additional GB: $0.10 per GB per month, billed per minute.
• Billing applies whenever the container is running.