Hi, We are successfully using libldns (C) in our project to perform DNS queries. At some point the requirements for queries per minute went high and in order to fulfill those we had to start fork()-ing the process to perform queries in parallel. This works well but we are concerned now about the amount of processes run in the system.
After searching on the net I found out about libunbound and it's ability to perform asynchronous queries. This looks awesome, but the questions are as follows. Given the requirement to perform up to 20-40 DNS queries to different name servers asynchronously in a single task, how well can unbound handle such load (with all the possible timing outs and so on)? What would be the recommended limit of queries in this case? And the second question, perhaps anybody has an idea, how easy is switching from libldns to libunbound? What are the advantages/disadvantages of doing that? Cheers, VL
