Re: General purpose hashing func in pgbench

From: Ildar Musin <i(dot)musin(at)postgrespro(dot)ru>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: General purpose hashing func in pgbench
Date: 2017-12-25 14:55:39
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25/12/2017 17:12, Fabien COELHO пишет:
> However, the key can be used if controlled so that different values do
> not have the same randomization in different part of the script, so as
> to avoid using the same patterns for different things if not desirable.
Original murmur algorithm accepts seed as a parameter, which can be used
for this purpose. I used value itself as a seed in the patch, but I can
turn it into a function argument.
> For the pgbench pseudo-random permutation I'm looking at, the key can
> be specified to control whether the same pattern or not should be used.
Just curious, which algorithm are you intended to choose?

Ildar Musin
Postgres Professional:
Russian Postgres Company

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