[389-users] MDB db questions/concerns

The mdb change came as a worrying surprise when the container pulled down 3.0.1 without me realizing it. I've read as much as I can find (which is not much), but I don't understand all the changes. Questions:

1. Is there a way to continue to pull the 2.5 version of the container?
2. If I update an existing 2.5 container instance to 3.0.1, will it continue to use bdb?
3. The nsslapd-mdb-max-size attribute:
- Does this only set the size of the db on disk? What if it exceeds that limit?
- I was going to set it to "use all available space" until I saw these comments, but not sure what to make of them and I don't feel any closer to understanding what I should do with this attribute:

- the file will tend to grow up to its maximum
- if real memory is smaller than the file then pages will be swappped
- My first experience about configuring oversized database was interresting:
at first I did not capped the value to 1Gb and the basic import scenario was spending
hours before failing because disk was full (with a real db size around 10Gb on the test VM)
while once capped to 1 GB the import was successful in less than 10 minutes
==> *Correct sizing matters*"
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