find optimal prefix to allocate to avoid fragmentation #14
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ecbaldwin
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ecbaldwin
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ecbaldwin
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ecbaldwin
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Given two sets, the first one representing the full IP space which can be used, and a second representing what has already been used or allocated, this algorthim can find a best fit prefix that you can add to reserved set which will minimize the fragmentation of the resulting reserved set. This can be used to allocate IP address subnets in the best way possible to avoid situations where a subnet cannot be allocated because the space was not allocated carefully enough. It cannot prevent all fragmentation. Since it has no knowledge of how prefixes may be deallocated in the future, it cannot make decisions to allocate so that deallocations will open up the most contiguous space possible.
It doesn't necessarily need to complete the entire difference operation. It can look for the best prefix while it is performing the diff.
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Given two sets, the first one representing the full IP space which can be used, and a second representing what has already been used or allocated, this algorthim can find a best fit prefix that you can add to reserved set which will minimize the fragmentation of the resulting reserved set.
This can be used to allocate IP address subnets in the best way possible to avoid situations where a subnet cannot be allocated because the space was not allocated carefully enough.
It cannot prevent all fragmentation. Since it has no knowledge of how prefixes may be deallocated in the future, it cannot make decisions to allocate so that deallocations will open up the most contiguous space possible.