afonsoaugusto

mongo "mongodb+srv://sandbox-felrd.mongodb.net/test" --username m001-student
pwd: m001-mongodb-basics

load("loadMovieDetailsDataset.js")

use video
db.getCollectionInfos()
db.getCollectionInfos( { name: "movieDetails" } )

var data = db.movieDetails.findOne();

afonsoaugusto

echo "
storage:
  dbPath: /var/mongodb/db/node1
net:
  bindIp: 192.168.103.100,127.0.1.1,localhost
  port: 27011
security:
  authorization: enabled
  keyFile: /var/mongodb/pki/m103-keyfile
systemLog:

afonsoaugusto

wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_comparisonOperators.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_element_operators.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_logical_operators.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_all_operator.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_size_operator.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_elemMatch_operator.js
wget https://s3.amazonaws.com/edu-downloads.10gen.com/M001_2018_May/static/handouts/m001_regex_operator.js

mongo "mongodb+srv://sandbox-felrd.mongodb.net/test" --username m001-student
pwd: m001-mongodb-basics

afonsoaugusto

#Final Exam
/*
Which of the following are valid command line instructions to start a mongod? 
You may assume that all specified files already exist.
*/

mongod -f /etc/mongod.conf  # ok

afonsoaugusto

/*
Setting Up a Sharded Cluster
Lab - Configure a Sharded Cluster
*/

create keyfile
# openssl rand -base64 741 > /var/mongodb/pki/m103-keyfile


rm -rf /var/mongodb/db/{node1,node2,node3}

afonsoaugusto

Section 1: Philosophy & Features:
1. Which of the following does MongoDB use to provide High Availability and fault tolerance?

a. Write Concern # Write concern describes the level of acknowledgement requested from MongoDB for write operations to a standalone mongod or to replica sets or to sharded clusters. In sharded clusters, mongos instances will pass the write concern on to the shards.

* b. Replication # provê o HA

c. Sharding # é a distribuição do dado

d. Indexing # index

afonsoaugusto

How to unzip gz file using Python
https://stackoverflow.com/questions/31028815/how-to-unzip-gz-file-using-python

import pandas as pd
import os
fn = '../data/file_to_load.json.gz'
print(os.path.isfile(fn))
df = pd.read_json(fn, lines=True, compression='gzip')
df.tail()

afonsoaugusto

Notas Udacity Brasil - Melhores práticas para potencializar o portfólio no GitHub

afonsoaugusto

https://classroom.udacity.com/courses/ud617

Example code

cd /home/training/udacity_training
[training@localhost udacity_training]$ head -50 data/purchases.txt | ./code/mapper.py | sort | ./code/reducer.py 

[training@localhost udacity_training]$ pwd
/home/training/udacity_training

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https://classroom.udacity.com/courses/ud617

Patterns

Filtering * Sampling * Top-N * Simple Filter * Bloom Filter ()

• Sampling