Features

Use build time optimization to reduce the size of the final binaries.
Implement real error types, improving feedback to users in case something goes awry. This also allows better handling of some code paths. (#18)
Test connectivity to the metadata cluster before starting. (#8)
Add a Test subcommand to verify the configuration file, metadata cluster connectivity, and 0-db backend connectivity. (#20)
Add a logfile for operations. The logfile will be placed in the current working directory, and is called zstor.log. The logfile will automatically rotate once it reaches a size of 10MiB, and up to 10 logfiles will be kept. (#21)
Verify that a 0-db namespace has sufficient capacity left before attempting to write the shard to it. (#27)
Support unhealthy backends when writing, by removing them from the config before trying to generate a new write configuration. (#4)

Bug Fixes