Pickle or Mysql

[Rene Pijlman]

amaltasb at gmail.com:
>Can I use Pickle to store about 500,000 key value pairs.. 

Performance would be horrible. Use a BTree in ZODB instead:
http://www.zope.org/Wikis/ZODB/guide/node6.html#SECTION000630000000000000000

>or should I use mySql.

You should use a relational database, such as PostgreSQL, when you want to
model your data as relations (tables) instead of objects, or when you want
to use SQL, or when another application needs to access the data that only
speaks SQL, or ...

-- 
René Pijlman