Storage Examples

This page describes storage examples using the StorageManager class.

The storage examples include:

• Downloading a file - Get an object from storage.
• Uploading a file - Upload an object.
• Setting cache limits - Set the maximum number of objects.

StorageManager

Downloading a file

To download an ZIP file from storage to the global cache context, call the StorageManager.get_local_copy method, and specifying the destination location as the remote_url argument.

# create a StorageManager instance
manager = StorageManager()

manager.get_local_copy(remote_url="s3://MyBucket/MyFolder/file.zip")

To download a file to specific context in cache, and specify the cache_context argument as the name of the context.

manager.get_local_copy(remote_url="s3://MyBucket/MyFolder/file.ext", cache_context="test")

To download a non-compressed file, set the extract_archive argument as False.

manager.get_local_copy(remote_url="s3://MyBucket/MyFolder/file.ext", extract_archive=False

Uploading a file

To upload a file to storage, call the StorageManager.upload_file method. Specify the full path of the local file as the local_file parameter argument, and the remote URL as the remote_url parameter argument.

manager.upload_file(local_file="/mnt/data/also_file.ext", remote_url="s3://MyBucket/MyFolder")

Setting cache limits

To set a limit on the number of files cached, call the StorageManager.set_cache_file_limit method and specify the cache_file_limit argument as the maximum number of files. This does not limit the cache size, only the number of files.

new_cache_limit = manager.set_cache_file_limit(cache_file_limit=100)