HashXX

Purpose

Generates hash for a given string.

hash32(literal_string) / hash32(literal_string, seed)

Generates a 32 bit hash of the given string.
  • Seed is an optional parameter with default = 0.
  • If seed is not a valid number, then 0 is returned.

hash64(literal_string) / hash64(literal_string, seed)

Generates a 64 bit hash of the given string.
  • Seed is an optional parameter with default = 0.
  • If seed is not a valid number, then 0 is returned.

Warning

  • Default hash implementation is non-crypto.
  • To use xxhash enable compile time flag.

Example

module(load="fmhash")

set $.hash = hash64($!msg!field_1 & $!msg!field_2 & $!msg!field_3)
set $!tag= $syslogtag & $.hash;
//send out

See also

Hash based sampling

See also

Help with configuring/using Rsyslog:

  • Mailing list - best route for general questions
  • GitHub: rsyslog source project - detailed questions, reporting issues that are believed to be bugs with Rsyslog
  • Stack Exchange (View, Ask) - experimental support from rsyslog community

See also

Contributing to Rsyslog: