nickva

#!/bin/sh

http delete $DB/db
http put $DB/db'?q=4'

http put $DB/db/_design/d views:='{"v": {"map":"function(doc){emit(doc._id, 42);}"}}'

http put $DB/db/x a=b
http put $DB/db/y a=b
http put $DB/db/z a=b

nickva

% ./erlperf \
  'runner(Unsorted) -> lists:sort(Unsorted).' \
   --init_runner '[{rand:uniform(), I} || I <- lists:seq(1,500)].' \
   'runner(Sorted) -> lists:sort(Sorted).' \
   --init_runner 'lists:sort([{rand:uniform(), I} || I <- lists:seq(1,500)]).'
Code                                              ||        QPS       Time     Rel
runner(Sorted) -> lists:sort(Sorted).              1      69223   14446 ns    100%
runner(Unsorted) -> lists:sort(Unsorted).          1       7158     140 us     10%

nickva

#!/usr/bin/env python3

import optparse
from dataclasses import dataclass
from collections import defaultdict


@dataclass
class Param:
    name: str

nickva

%
% $ erl -name n1@127.0.0.1
%
% $ erl -name n2@127.0.0.1
% (n2@127.0.0.1)2> dist_perf:go('n1@127.0.0.1').
%  started
%  Sent:953MB/s, Hist:{6,0,0,12,0,0,0,0,0,0,0} RHist:{0,0,0,0,0,0,0,0,0,97,0}
%  Sent:961MB/s, Hist:{1,0,0,12,0,0,0,0,0,0,0} RHist:{0,0,0,0,0,0,0,0,0,155,0}
%  Sent:953MB/s, Hist:{6,0,0,12,0,0,0,0,0,0,0} RHist:{0,0,0,0,0,0,0,0,0,202,0}
%

nickva

-module(slow_tuples).

-export([
    run/0
]).


run() ->
    run(7500, 0.0008, {1647,841737,351137}).

nickva

#!/usr/bin/env python

#
# Use a 3 node cluster
#
# Args examples:
# ./script.py -x 20 -n 100 -w 5 -p 10 -q
# ./script.py -x 100 -n 2 -p 20 -w 1 -t 10
# ./script.py -x 101 -n 2 -p 10 -w 5 -t 2

nickva

#!/bin/bash
set -xe

DB=http://adm:pass@localhost:15984

http $DB

http -b delete $DB/_replicator
http -b delete $DB/source
http -b delete $DB/target

nickva

#!/bin/sh

# Prevent regular doc writes to the replication source. Used, for example, when
# migrating to a new instance and we want to prevent clients writing to the old
# instance by accident. Design doc writes and all doc reads can still take
# place.
#
# (`http` is the httpie client https://httpie.io/)

DB="http://adm:pass@localhost:15984"

nickva

spawn(fun () ->
    net_kernel:monitor_nodes(true),
    F = fun Loop() ->
       receive Msg ->
           io:format("~n *** mon msg:~p~n", [Msg]),
           Loop()
       end
    end,
    F()
end).

nickva

Based on https://www.erlang.org/doc/installation_guide/install

Erlang Version:

commit eef2e7066ecdf9de5dc7fd81dc5043d9a9757efa (HEAD -> maint-24, tag: OTP-24.1.4, origin/maint-24)
Author: Erlang/OTP <otp@erlang.org>
Date:   Mon Nov 1 15:26:06 2021 +0100

SSL Versions: