What is HA. The upper part of this picture shows a cluster where the left node is currently active, i.e., the service's IP address that the client machines are talking to is currently on the left node. The service, including its IP address, can be migrated to the other node at any time, either due to a failure of the active node or as an administrative action. The lower part of the illustration shows a degraded cluster. In HA speak the migration of a service is called failover, the reverse process is called failback and when the migration is triggered by an administrator it is called switchover. → Continue with What DRBD does. NetScaler Features - Cloud Scale. Open vSwitch. HAProxy - The Reliable, High Performance TCP/HTTP Load Balancer.
2009/08/23 - Quick test of version 1.4-dev2 : barrier of 100k HTTP req/s crossed Introduction It was my first test since I moved house. I wanted to quickly plug the machines together to see if my work on version 1.4 went into the right direction, and most importantly was not causing performance drops. Verdict below confirms it. The first test only accepts a new connection, reads the request, parses it, checks an ACL, sends a redirect and closes. The second test forwards the request to a real server instead, and fetches a 64-byte object : These improvements are due to the ability to tell the system to merge some carefully chosen TCP packets at critical phases of the session. 2009/04/18 - New benchmark of HAProxy at 10 Gbps using Myricom's 10GbE NICs (Myri-10G PCI-Express) Precisely one year ago I ran some tests on the high performance 10GbE NICs that were donated to me by Myricom.
Lab setup The lab has almost not changed. Hardware / software setup : The tests are quite simple. Conclusion.