percona server is backwards compatible, in most cases can migrate back to regular mysql
faster and more scalable
easier to monitor and tune
easier to operate

perconal 5.5
  * stuff for ssd
  * big log files
  * double write
  * adaptive buffer flushing

multi cpu
  * buffer pool scalability
  * fix for adaptive hash rw lock

fast warmup for cloud

stable, predicitable performance
  * because of adaptive flushing

more ssd
  * enable/disable innodb read ahead
  * can disable flush neighbor pages

in combination with xtrabackup, can move one innodb table to another server

cleaned up show innodb status! table format

handler socket
  * direct access to data

they are trying to avoid fragmentation by including best from all groups
  * including maria db, 3rd party, facebook patches, etc.

looking at level 2 cache, ram from another box, virtual buffer pool
  * for cloud support, because xen vms have limited ram


can move partitions between servers -- no, paritions are complex


currently test on 24 and 32 core boxes
  * trying to get 48 core box

buffer pool warmup -- automated?
  * can do it automatically w/ recent patches