Downloading Files to Executions¶
You frequently have changing files like training samples/labels or pretrained models you want to use during your executions. I mean, what would you otherwise operate on.
You can either:
- download the files manually yourself using the tools you want; we don’t recommend this but might be easy way to get started if you’ve already mastered them
- use Valohai’s input mechanism to leverage our automatic record keeping, version control, reproducibility and caching features
This section covers Valohai’s input concept in more detail.
For a file to be usable by an execution, you first have to upload it to a data stores connected to the project either manually or by using our web user interface upload utility.
Here is how to upload files using the web user interface after the data store has been configured:
During an execution, Valohai inputs are available under
To see this in action, try running
ls -laR /valohai/inputs/ as the main command of an execution which has inputs.
When you specify the actual input or default for one, you have 3 options:
Option #1: Custom Store URL¶
You can connect private data stores to Valohai projects.
If you connect a store that contains files that Valohai doesn’t know about, like the files that you have uploaded there yourself, you can use the following syntax to refer to the files.
- Azure Blob Storage:
- Google Storage:
- Amazon S3:
- OpenStack Swift:
This syntax also has supports wildcard syntax to download multiple files:
s3://my-bucket/dataset/images/*.jpgfor all .jpg (JPEG) files
s3://my-bucket/dataset/image-sets/**.jpgfor recursing subdirectories for all .jpg (JPEG) files
Option #2: Datum URI¶
You can use the
datum://<identifier> syntax to refer to specific files Valohai platform already knows about.
Files will have a datum identifier if the files were uploaded to Valohai either:
- by another execution, or
- by using the Valohai web interface uploader under “Data” tab of the project
Option #3: Public HTTP(S) URL¶
If your data is available through an HTTP(S) address, use the URL as-is.