yannmh

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

yannmh

import boto3
import datetime

def lambda_handler(event, context):
    print("Connecting to RDS")
    client = boto3.client('rds')
    
    print("RDS snapshot backups stated at %s...\n" % datetime.datetime.now())
    client.create_db_snapshot(
        DBInstanceIdentifier='web-platform-slave', 

yannmh

# Add field
echo '{"hello": "world"}' | jq --arg foo bar '. + {foo: $foo}'
# {
#   "hello": "world",
#   "foo": "bar"
# }

# Override field value
echo '{"hello": "world"}' | jq --arg foo bar '. + {hello: $foo}'
{

yannmh

-- 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%' 

yannmh

Previous versions used homebrew to install the various versions. As suggested in the comments, it's better to use pyenv instead. If you are looking for the previous version of this document, see the revision history.

$ brew update
$ brew install pyenv
$ pyenv install 3.5.0
$ pyenv install 3.4.3
$ pyenv install 3.3.6
$ pyenv install 3.2.6
$ pyenv install 2.7.10

$ pyenv install 2.6.9

yannmh

[alias]
checkoutpr = "!f() { git fetch origin refs/pull/$1/head:pr/$1; git checkout pr/$1; } ; f"
checkoutcontrib = "!f() { git checkout master && git pull && git remote add $1 git@github.com:$1/dd-agent && git fetch $1 $2 && git checkout -b $3 $1/$2 && git rebase master } ; f"