[Zope] CoreSessionTracking and noundo db

[Bak@kedai]

hi
in trying out the excellent CoreSessionTracking product, i encountered a 
little problem.  the doc reference a no-undo external db to house the data.  
i remember one such beast which were alpha (berkerly dbm(?)), but can't 
locate it at zope.org.

also, will there ever be a no undo db for use with zope?  since such product 
is a must to run zope in real world.
hints, urls welcome

thanks

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