graphic7
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-Job- said:I still don't see how how hotswapping of processors is an essential feature. Most likely the computers you'll want to have up & running 24/7 would be servers. You can easily have multiple servers sharing the load, and when one of them goes down the rest can easily fill in for it while you repair it. Especially with blade servers which are so efficient and so small you can easily have this. IMO hotswapping is a neat feature but not an essential one.
Why if you can't have a disruption in services? If the system goes down, during the fallover you will have a disruption of service, and for some environments that's not an option. In fact, we're also using HACMP, IBM's high availability suite, to fall over to other nodes, in case the node in use experiences a failure; however, we still need to have fault-tolerant features in the nodes -- failover is the last option.
Blade servers are also not capable of handling the load these POWER systems endure, either. Most of the POWER servers here have > 8GB of memory, 2-8 processors, and multiple fibre HBAs so we can have redundant fibre paths in case of a physical path failure. With Blade servers (example, IBM's JS20), you share two fibre HBAs between all the blades in the enclosure. Suppose the physical paths on those two fail -- you're left with a bunch of blades that can't access the SAN.
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