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Forum Discussion

AndrewM_4835's avatar
AndrewM_4835
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Jun 11, 2008

Hash Load Balancing

Dear Forum,     I am looking at trying an iRule to persistently load balance a group of web servers.     I have found an article 'Hash Load Balancing and Persistence on BIG-IP LT...
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AndrewM_4835's avatar
AndrewM_4835
Icon for Nimbostratus rankNimbostratus
Jun 14, 2008
The solution with checking which nodes are currently active myself seems a little slow - and I can't imagine it scales very well...

 

 

I originally tried "persist uie", but the problem I had is that initially, should one server go down, all load would be split across the remaining servers BUT when I bring the broken server back up, it no longer gets any traffic as all '100' different values are mapped to the other servers until a timeout happens.

 

 

This is even worse during a complete restart, because with stupid luck, 1 of the 4 servers may get ALL the traffic.

 

 

Does persist hash not also have the same problem?