MurmurHash - what is it?

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I've been trying to get a high level understanding of what MurmurHash does.

I've read a basic description but have yet to find a good explanation of when to use it and why. I know its very fast but want to know a bit more.

I asked a related question about how I could fit a UUID into a Redis bitset, and someone suggested using MurmurHash. It works but I'd like to understand the risks/benefits.

murmurhash redis hash
2 Answers

MurmurHash can be return negtive value， original value bit AND against 0x7fffffff。that is value & 0x7fffffff .When the input is positive, the original value is returned. When the input number is negative, the returned positive value is the original value bit AND against 0x7fffffff which is not its absolutely value. note:MurmurHash's return value can not be fix length.

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