Anil Yadav anilyadav

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

Tcpdump

Tcpdump is a commandline tool that is used to dump traffic on a network. This tool comes in hand when you want to analyse network captures within the command line. Basically it can do most of the wireshark job.

NOTE This guide might not be complete it just serve as a reference to me.

Additional Note & Reference

Sed Cheat Sheet

Sed command line options

sed [options] sed-command [input-file]

Option	Description	Example

Debugging Redis Keyspace Misses

Simply put, a keyspace "MISS" means some piece of data you tried to retrieve from Redis was not there. This usually means that one of the following things happened:

The key expired
They key was renamed
The key was deleted
The key was evicted due to memory pressure
The entire database was flushed
The key was never actually inserted

	# BENCHMARK-----------------------------------------------------

	#1. Rust kafka-benchmark (https://github.com/fede1024/kafka-benchmark)
	# must create topic with 6 partitions first
	bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 6--topic [scenario]
	# replace scenario with one in file kafka-benchmark/config/base_producer.yaml

	[s3]
	#s3 bucket name
	bucket_name = my_backups
	download_threads = 6
	# other s3 access is defined in the default aws cli settings file

	[opscenter]
	backup_job_uuid = # get this from s3 bucket

	[node]

	#!/bin/bash

	input=$1
	hole_size=$2
	hole_found=false
	old_line=
	sample=
	previous_offset=
	if [ "$hole_size" = "" ]; then
	hole_size="1024"

	-- 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%'

	#!/bin/bash

	name=$RANDOM
	url='http://localhost:9093/api/v1/alerts'

	echo "firing up alert $name"

	# change url o
	curl -XPOST $url -d "[{
	\"status\": \"firing\",

	# If using the RTP cluster, replace:
	# <couchbase-ip>:8091 -> couchbase-ivpp.apps.vmware.openshift.wwva.ciscolabs.com
	# <couchbase-ip>:8092 -> couchbase-xdcr-ivpp.apps.vmware.openshift.wwva.ciscolabs.com

	# To see all of the buckets on the server.
	curl -u Administrator:password -XGET http://<couchbase-ip>:8091/pools/default/buckets

	# To delete an existing bucket.
	curl -u Administrator:password -XDELETE http://<couchbase-ip>:8091/pools/default/buckets/<bucket-name>