Full_Name: Henrik Bohnenkamp
Version: >= 2.4.44, HEAD
OS: Ubuntu 18.04, Coreos 7.5
Submission from: (NULL) (126.96.36.199)
This is a followup to
When MDB is used as backend database and with large DITs (O(10^6)) with many
alias entries (O(10^5)), search requests with deref=always and scope=sub will
take prohibitively long. Servers with a high request rate might become utterly
unresponsive. This problem is not present in the HDB backend.
In this issue I want to contribute two things:
- a means to demonstrate the problem; this in the form of two scripts
(bash/python) which set up a large test DIT and start two slapds (one HDB, one
MDB) to allow easy comparisons of the performance
- a patch to fix the problem
The patch is certainly not production ready (or, if it is, it needs still
exhaustive testing to inspire confidence), however, I think it is far enough to
at least discuss the approach.
Both the scripts and the patch, together with instructions how to use the former
can be found here:
I am looking forward to discuss the patch.