Maintain Load Balancer logs | Compatible upgrades
Load Balancer: Maintenance involving planned outages
Upgrades to the Load Balancer hardware, operating system, or software, typically require stopping the network dispatcher. When using Load Balancer High Availability (see 11.3, Configure Load Balancer High Availability), we can stop the active or the standby Load Balancer from performing the desired maintenance or upgrades without affecting WebSphere Commerce site availability. However, for the time of updating the standby Load Balancer, the active Load Balancer is a single point of failure. Therefore, IBM recommends using a temporary (standby) machine, if you want true High Availability all along and to reduce the timeframes for the existence of single points of failure.
Like for Web servers, we also look at different types of upgrades requiring server outage:
- Compatible upgrades, where an updated Load Balancer can exist in a High Availability configuration with a not-yet-updated Load Balancer (See 28.2.1, Compatible upgrades.)
- Incompatible upgrades, where an updated Load Balancer cannot exist in a High Availability configuration with a not-yet-updated Load Balancer (See 28.2.2, Incompatible upgrades.)
xxxx