openMosix is a Linux-kernel patch which provides full compatibility with standard Linux for IA32-compatible platforms.
The internal load-balancing algorithm transparently migrates processes to other cluster members. The advantage is a better load-sharing between the nodes. The cluster itself tries to optimize utilization at any time (of course the sysadmin can affect these automatic load-balancing parameters by manual configuration at runtime). openMosix is released under the GPLv2 license.
This means that when you install an openMosix based cluster, for an application it looks like it has a huge SMP machine. This approach still has some limitations, however an active development team is working on new features, such as shared memory, clustermask and loadlimit each day.
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