mahigupta

https://jwiegley.github.io/git-from-the-bottom-up/ 

mahigupta

Design Doc Title

Stakeholders

List stakeholders for project/feature.

Role	Person
Dev Owner
Other Dev 1 (Engine)

mahigupta

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

mahigupta

#!/bin/bash

force_color_prompt=yes
color_prompt=yes
parse_git_branch() {
 git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
if [ "$color_prompt" = yes ]; then
 PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(parse_git_branch)\[\033[00m\]\$ '
else

mahigupta

Gcloud commands

gcloud auth application-default login
gcloud init

gcloud auth application-default print-access-token

multiple config in cloud

mahigupta

kubectl

1. kubectl explain pod.spec
2.   kubectl explain pods
3.    kubectl create -f kubia-manual.yaml    — creating new pod from yaml file
4.   kubectl port-forward kubia-manual 8888:8080   — port forwarding to reach a manually added pod from outside
5.  kubectl label pods kubia-manual creation_method=manual  — adding label to a running container
6.  kubectl label pods kubia-manual-v2 env=debug --overwrite — edit label on a running container

mahigupta

to debug long runnign queries in mysql/mariadb

show ENGINE innodb status;
show status like '%';
show processlist;
Show status like "Threads%";
Select substring_index(host, ':', 1) as host_name,state,count(*) from information_schema.processlist group by state,host_name;
Show global variables like '%';

mahigupta

jQuery.expr[':'].regex = function(elem, index, match) {
    var matchParams = match[3].split(','),
        validLabels = /^(data|css):/,
        attr = {
            method: matchParams[0].match(validLabels) ? 
                        matchParams[0].split(':')[0] : 'attr',
            property: matchParams.shift().replace(validLabels,'')
        },
        regexFlags = 'ig',
        regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags);

mahigupta

if (typeof Object.create !== 'function') {
	Object.create = function (o) {
		function F() {}
		F.prototype = o;
		return new F();
	};
}