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@hkulekci
hkulekci / size.md
Last active June 23, 2023 11:58
Elasticsearch Nested Array Object Size Aggregation 
# images field type is nested
GET products/_search
{
  "track_total_hits": true, 
  "size": 0, 
  "aggs": {
    "counts": {
      "terms": {
 "script": "params['_source']['images'].size()",
@nhymxu
nhymxu / README-python-framework-benchmark.md
Last active March 27, 2024 00:45
Flask vs Falcon vs FastAPI benchmark 
gunicorn run:app --workers=9
gunicorn run:app --workers=9 --worker-class=meinheld.gmeinheld.MeinheldWorker

Macbook Pro 2015 Python 3.7

Framework Server Req/s Max latency +/- Stdev
@metafeather
metafeather / main.go
Created April 27, 2017 13:06
Get goroutine id for debugging
# ref: https://play.golang.org/p/OeEmT_CXyO
package main
import (
"fmt"
"runtime"
"strconv"
"strings"
"sync"
)
@zpalexander
zpalexander / .bash_profile
Created April 15, 2017 18:50
Bash Profile
[[ -s "$HOME/.profile" ]] && source "$HOME/.profile" # Load the default .profile
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
export NVM_DIR="$HOME/.nvm"
. "$(brew --prefix nvm)/nvm.sh"
# ---------------------------------------------------------------------------
#
# Description: This file holds all my BASH configurations and aliases
@nathforge
nathforge / expbackoff.sh
Created December 22, 2016 10:33
Exponential backoff in Bash
expbackoff() {
# Exponential backoff: retries a command upon failure, scaling up the delay between retries.
# Example: "expbackoff my_command --with --some --args --maybe"
local MAX_RETRIES=${EXPBACKOFF_MAX_RETRIES:-8} # Max number of retries
local BASE=${EXPBACKOFF_BASE:-1} # Base value for backoff calculation
local MAX=${EXPBACKOFF_MAX:-300} # Max value for backoff calculation
local FAILURES=0
while ! "$@"; do
FAILURES=$(( $FAILURES + 1 ))
if (( $FAILURES > $MAX_RETRIES )); then
@dmarcuse
dmarcuse / ClasspathHacker.java
Created September 14, 2016 21:14
Add jars to the classpath at runtime!
import java.io.File;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
/**
*
* @author apemanzilla
*
*/
@kevin-lee
kevin-lee / JProfiler-with-Docker.md
Created August 10, 2016 15:55
JVM Profiler with Docker

JProfiler with Docker

Docker

DockerFile

DockerFile should have JProfiler installation.

RUN wget <JProfiler file location> -P /tmp/ && \
  tar -xzf /tmp/<JProfiler file> -C /usr/local && \
  rm /tmp/<JProfiler file>
@andyj
andyj / bash_script_to_back_up_mysql_to_s3.sh
Last active April 2, 2019 08:54
Bash script to backup a MySQL RDS dump to S3
# From Andy Jarretts post:
# http://www.andyjarrett.co.uk/2016/08/02/secured-bash-script-to-backup-a-mysql-rds-dump-to-s3/
#!/bin/bash
SQLDUMP="$(date +'%Y%m%d%H%M').sql.gz"
echo "Creating backup of database to $SQLDUMP"
mysqldump --login-path=local --databases YourDatabaseName | gzip -9 > $SQLDUMP
echo "Dump Zipped up"
@ursuad
ursuad / kafka-cheat-sheet.md
Last active March 14, 2024 10:32
Quick command reference for Apache Kafka

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

@vasanthk
vasanthk / System Design.md
Last active May 4, 2024 16:39
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?