New Features

A new namespace, jepsen.tests.bank, provides support for running snapshot-isolated bank tests, including visualizations!
A new namespace, jepsen.tests.long-fork, looks for long forks, an anomaly possible under parallel snapshot isolation
For flaky databases, you can now throw a particular type of exception to trigger automatic retries in DB setup
jepsen.control/daemon-running? checks to see if pidfiles are alive
Jepsen now downloads logs automatically if the JVM is interrupted; e.g. if a test crashes or if you ^C
Generators now provide a somewhat more helpful prn/pprint representation
jepsen.generator/time-limit now interrupts threads when the time limit expires, rather than waiting up to dt seconds
jepsen.cli/single-test-cmd now also provides an analyze command for re-running an analysis on the last test. This is a gross hack, but really helpful.
CLI tests can now pass --nodes n1,n2,n3 instead of passing --node n1 --node n2, ...

API Changes

jepsen.checker/set and queue now emit absolute counts, rather than ambiguous fractions.

jepsen.checker/set now accepts any type of collection, not just sets. We're laying the groundwork for multiset checkers
The web interface now shows test times with punctuation
jepsen.nemesis default nemeses now use the Nemesis protocol
jepsen.generator/delay and stagger now validate their arguments are non-negative integers

jepsen.checker.perf/qs->colors works with more than six quantiles now.
jepsen.generator/phases and concat no longer make you wade through every phase in order to get ops from later phases. This fixes a common issue where operations in a test with a waiting phase had to wait on every final operation.