fasthash¶

Description¶

Returns a numeric hash for the specified string.
fasthash is guaranteed to return a high quality hash of the input as quickly as practical.
The hash value returned is between 0 and 2^63-1 inclusive (a positive integer).
fasthash was added because there are many use cases (ie CARP) which need a hash of some
value (ie URI) and which were using crc32 (which is a bad and slow hash function).

Note: fasthash does not guarantee to provide the same hash value across different BIG-IP versions and over BIG-IP reboots. Do not use fasthash for long term and persistent storage.

Syntax¶

fasthash <string>

Examples¶

when CLIENT_ACCEPTED {
    set str "hello world"
    log local0. "hash of $str is [fasthash $str]"
}

Introduced: BIGIP-11.4.0

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