The following summary shows my personal understanding of MySQL 5.1 licenses, packages and products. It does not necessarily reflect 100% the way MySQL understands it. But after all the discussions I hope it is as close as possible to the reality:
MySQL Embedded Database Server (Download: enterprise.mysql.com -> OEM Software)
Classic (OEM license, -MEM -InnoDB)
Pro (= Classic +InnoDB)
Advanced (= Pro +Partitioning)
MySQL Community Sever (Download: www.mysql.com -> Downloads)
Community (GPL, -NDB)
MySQL Enterprise Server (Download: enterprise.mysql.com -> Enterprise Software)
Pro (GPL or commercial, -NDB +InnoDB +MEM, Basic + Silver customer, MRU + QSP)
Advanced (= Pro +Partitioning, Gold + Platinum customer)
MySQL Cluster (Download: http://dev.mysql.com/downloads/cluster/)
Community Edition (GPL, all features)
Com (ex CGE?) (OEM or commercial, -InnoDB +NDB)
Com-Pro (Com, all features)
Standard Edition (= Com, -NDB-API -Cluster-Repl, -LDAP)
Upgrade
EP customer should follow the QSP trail unless it is critical for them to install an MRU to get a quick bugfix to hold them over until the next QSP is released.
Month version / release
0 5.1.30
1 5.1.30-MRU1
2 5.1.30-MRU2
3 5.1.31
4 5.1.31-MRU1 and 5.1.30-QSP
5 5.1.31-MRU2
6 5.1.32
7 5.1.32-MRU1 and 5.1.31-QSP
Legend
CE - Community Edition
EP - Enterprise Edition (why not EE?)
MRU - Monthly Rapid Update (EP only)
QSP - Quarterly Service Pack (EP only)
OEM - Original Equipment Manufacturer
MEM - MySQL Enterprise Monitior
CGE - Carrier Grade Edition
Please correct me, if I am wrong. And when you have more questions let me know and I try to clear this.
