# datashake - level out zpools by rewriting files

## Background

See [this blog post](https://blog.humancabbage.net/posts/datashake) for the
motivation behind this program. Basically, this program copies files back-and-
forth between ZFS datasets to attempt to address unbalanced utilization among
vdevs.

## Usage

```text
$ datashake --source /tank/stuff --temp /tank/temp --concurrency 2
```

## Shortcomings

* The way actions and errors are logged in-memory and only persisted at the
  end is not robust enough. Program crashes or system power loss can cause
  files to be lost in the temporary directory. In the meantime, the program
  still writes to `stdout` for each copy operation, so piping the output to
  `tee` should suffice for now.