Clay Gerrard a8bd2f737c Add dispersion command to swift-ring-builder ...

Output a dispersion report that shows how many parts have each replica count
at each tier along with some additional context.  Also the max_dispersion is a
good canary for what a reasonable overload might be.

Also display a warning on rebalance if the ring's dispersion is sub-optimal.

The primitive form of the dispersion graph is cached on the builder, but the
dispersion command will build it on the fly if you have a ring that was last
rebalanced before the change.

Also add --force option to rebalance to make it write a ring even if less than
1% of parts moved.

Try to clarify some dispersion and balance a little bit in the ring section of
the architectural overview.

Co-Authored-By: Christian Schwede <christian.schwede@enovance.com>
Co-Authored-By: Darrell Bishop <darrell@swiftstack.com>

Change-Id: I7696df25d092fac56588080722e0a4167ed2c824

2015-01-08 18:40:27 -08:00

..

__init__.py

Add some tests for bin/swift-recon

2014-01-31 15:34:37 +00:00

test_form_signature.py

Make swift-form-signature output a sample form

2014-08-05 11:11:03 -07:00

test_info.py

Use except x as y instead of except x, y

2014-07-07 15:42:13 -07:00

test_recon.py

Merge "updated hacking rules"

2014-10-03 01:47:40 +00:00

test_ringbuilder.py

Add dispersion command to swift-ring-builder

2015-01-08 18:40:27 -08:00