AWS Lambda

The security policy of AWS Lambda restricts writing outside the /tmp directory.

To make docTR work on Lambda, you need to perform the following two steps:

1. Disable the usage of the multiprocessing package by setting the DOCTR_MULTIPROCESSING_DISABLE environment variable to TRUE. This step is necessary because the package uses the /dev/shm directory for shared memory.

2. Change the caching directory used by docTR for models. By default, it is set to ~/.cache/doctr, which is outside the /tmp directory on AWS Lambda. You can modify this by setting the DOCTR_CACHE_DIR environment variable.