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How to reduce .terragrunt-cache size

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Answer

Our base infrastructure repo with only 5 accounts/30 accounts is already 15GB in size, locally, due to .terragrunt-cache folders in every module. Is there any smart way to reduce the total size of the cache folders?

This is unfortunately a known issue that we haven't had a chance to tackle. The issue ticket in `terragrunt` for this feature request is https://github.com/gruntwork-io/terragrunt/issues/561. I recommend taking a look at some of the comments on the issue, as some of our open source users have found ways to workaround this by using a centralized download directory (specifically, [this comment](https://github.com/gruntwork-io/terragrunt/issues/561#issuecomment-1032170292)).