Percona toolkit 2.1.1 is now available on Dotdeb for Debian 6.0 “Squeeze”. You’ll find its Changelog here.
2.1 introduces a lot of new code for:
pt-online-schema-change(completely redesigned)pt-mysql-summary(completely redesigned)pt-summary(completely redesigned)pt-fingerprint(new tool)pt-table-usage(new tool)
Baron Schwartz also wrote a blog post that presents pt-online-schema-change, a new and useful online schema change tool.