David Liman dvliman

Product engineer. Life long student.

dvliman / kv.erl

Created October 22, 2017 17:34

erlang benchmark kv

	% -- coding: utf8 --
	%% Benchmarking code samples.
	%% Each benchmark is launched in it's own process to eliminate GC influence.
	-module(benchmark).
	-export([main/0]).


	main() ->
	% {Test name, TestFun1, TestFun2, Constructor}
	% Constructor runtime isn't counted

dvliman / schedules.csv

Last active October 31, 2017 05:25

	user_token	username	user_email	user_phone	role_token	stime	etime
	3dd92bb0-8b35-496d-b971-a2c0b9db4bc5	david	[email protected]	+17142532851	3dd92bb0-8b35-496d-b971-a2c0b9db4bc5	2017-09-19T20:55:38Z	2017-09-19T20:55:38Z

dvliman / gist:ea735f3883b83f0b61d94ab5b5d6f61d

Created September 8, 2017 04:09

	IPPUDO NYC Sale $85.00
	RUSSIA HOUSE Sale $250.00

	SLEEP NO MORE Sale $468.00

	Founding Farmers DC Sale $95.00
	PRESS LIQUORS Sale $80.01
	DONBURI Sale $81.25

	AIRBNB * HMREWFS8BW Sale $678.00 (do i have 2 airbnb accounts?)

dvliman / postgres_queries_and_commands.sql

Created September 6, 2017 00:12 — forked from rgreenjr/postgres_queries_and_commands.sql

Useful PostgreSQL Queries and Commands

	-- show running queries (pre 9.2)
	SELECT procpid, age(query_start, clock_timestamp()), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(query_start, clock_timestamp()), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'

dvliman / creditcards.json

Created September 3, 2017 07:03

	curl "https://api.airtable.com/v0/appoAiBETQwaHoz04/creditcards?maxRecords=3&view=Grid%20view" \
	-H "Authorization: Bearer keybVVN1Q7Zd7qvhE" \| python -m json.tool
	% Total % Received % Xferd Average Speed Time Time Time Current
	Dload Upload Total Spent Left Speed
	100 6700 100 6700 0 0 12175 0 --:--:-- --:--:-- --:--:-- 12181
	{
	"records": [
	{
	"createdTime": "2017-08-30T05:03:45.000Z",
	"fields": {

dvliman / gist:0c9560ec582f80e0d601e3452f0cdbb4

Created May 8, 2017 22:04

openssl-caveats

	A CA file has been bootstrapped using certificates from the SystemRoots
	keychain. To add additional certificates (e.g. the certificates added in
	the System keychain), place .pem files in
	/usr/local/etc/openssl/certs

	and run
	/usr/local/opt/openssl/bin/c_rehash

	This formula is keg-only, which means it was not symlinked into /usr/local.

dvliman / lmdb.tcl

Created April 30, 2017 19:48 — forked from antirez/lmdb.tcl

LMDB -- First version of Redis written in Tcl

	# LVDB - LLOOGG Memory DB
	# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
	# All Rights Reserved

	# TODO
	# - cron with cleanup of timedout clients, automatic dump
	# - the dump should use array startsearch to write it line by line
	# and may just use gets to read element by element and load the whole state.
	# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
	# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

dvliman / initial_calls.erl

Created March 25, 2017 00:54 — forked from rlipscombe/initial_calls.erl

Finding leaked processes in Erlang

	lists:sort(fun({_, X}, {_, Y}) -> X > Y end,
	dict:to_list(lists:foldl(
	fun(Pid, Dict) ->
	InitialCall = case erlang:process_info(Pid, initial_call) of
	{initial_call,{proc_lib,init_p,A}} ->
	case erlang:process_info(Pid, dictionary) of
	{dictionary, D} -> proplists:get_value('$initial_call', D, undefined);
	_ -> {proc_lib,init_p,A}
	end;
	{initial_call,{erlang,apply,A}} ->

dvliman / initial_calls.erl

Created March 25, 2017 00:54 — forked from rlipscombe/initial_calls.erl

Finding leaked processes in Erlang

	lists:sort(fun({_, X}, {_, Y}) -> X > Y end,
	dict:to_list(lists:foldl(
	fun(Pid, Dict) ->
	InitialCall = case erlang:process_info(Pid, initial_call) of
	{initial_call,{proc_lib,init_p,A}} ->
	case erlang:process_info(Pid, dictionary) of
	{dictionary, D} -> proplists:get_value('$initial_call', D, undefined);
	_ -> {proc_lib,init_p,A}
	end;
	{initial_call,{erlang,apply,A}} ->

dvliman / cassandra-notes

Created March 21, 2017 18:52

cassandra-notes

	http://engblog.polyvore.com/2015/03/cassandra-compaction-and-tombstone.html
	size tiered (need storage space, mixed read, update, delete workloads) vs.
	level tiered compaction strategy (read heavy workloads, more resource intensive)

	http://dbwrangler.blogspot.co.id/2012/10/cassandra-working-with-time-to-live-ttl.html
	about ttl and compaction in cassandra with 3 nodes

	http://www.sestevez.com/range-tombstones/
	range tombstone