One of the main reasons to use NOSQL database is built in sharing capabilities.
Sharing allows to distribute single database across cluster of machines.
It means, distribute the load rather than purchasing the large server.
Sharing also help in server handling big data. The data stored in database is increasing exponentially.
Some databases are very large for each server....
Monday, 31 July 2017
July 31, 2017
Features of MongoDB
Friday, 28 July 2017
July 28, 2017
What is Amazon ElasticCache ?
Many applications getting popular which is great, but when it comes to performance under heavy load, it is very bad. At the peak times, users are just giving up.
How we can solve this issue without re-engineering the application?
Amazon ElasticCache will solve the problem. It improves the performance of web applications by allowing the retrive the information fast, in-memory caches instead of relying...
July 28, 2017
Install Nodejs on Ubuntu 16.04
Node.js is a platform built on chrome's Javascript runtime for easily bulding fast and scalabale apps.
It uses an event driven, non blocking I/O model that makes it light weight and efficient for data intensive apps that run across distributed devices.
first update api package
$sudo apt-get update
Using apt package manager, then $sudo apt-get install nodejs
Install npm package
$sudo apt-get...
Sunday, 23 July 2017
July 23, 2017
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
sudo dockerd \
--storage-opt dm.datadev=/dev/sda1 \
--storage-opt dm.metadatadev=/dev/sdf
INFO[0000] libcontainerd: previous instance of containerd still alive (1271)
INFO[0000] [graphdriver] using prior storage driver: aufs
Error starting daemon: error while opening volume store metadata database: timeout
$ systemctl daemon-reload$ sudo service docker...
July 23, 2017
Docker Machine
It is a tool thats lets you install Docker Engine on virtual hosts.
It creates servers, installs docker and then configures the docker client to take to them.
Linux :
ubuntu@ip-192.33.33.22:~$ docker-machine ls
docker-machine: command not found
Install docker machine
$ curl -L https://github.com/docker/machine/releases/download/v0.12.1/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine...
Saturday, 15 July 2017
July 15, 2017
Install AWS Cli
Installing AWS Cli on Mac
Installing with Homebrew is easy. It is a popular package manager for MAC OSX.
To install Homebrew,
Check , ruby is installed in your mac ,
ruby -v
Install homebrew
Once homebrew installed, install python. To install Python, Gcc to be installed. you need xcode or commandline tools to be installed
you can download and install xcode...
Thursday, 13 July 2017
July 13, 2017
Online training
We provide training on Amazon Web Services
1.
AWS Architecture and different models of Cloud Computing
2. Compute Services:
AWS EC2, Auto Scaling and Load Balancing, AWS Lambda, Elastic
Beanstalk
3. Storage
Services : AWS S3, AWS EBS, AWS Glacier, AWS CloudFront, Storage Gateway,AWS
Snowball
4.
Database...
Wednesday, 12 July 2017
July 12, 2017
Installing MongoDB on Ubuntu 16.04
MongoDB is included in Ubuntu package repositories, but official MongoDB repository provides most upto date version.
We use official version of MongoDB
$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
The output should look like this
ubuntu@ip-192-41-15-154:~$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
Executing: /tmp/tmp.u96cXK2VEb/gpg.1.sh...
Tuesday, 11 July 2017
July 11, 2017
Amazon VPC
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What is Aws VPC ?
VPC is a virtual private cloud or virtual private network which you can define on Amazon cloud and create logically isolated sections on amazon cloud which supports IPv4...
Saturday, 8 July 2017
July 08, 2017
AWS DynamoDB
DynamoDB is no sql, fully managed database.
What is the difference between relational database and nosql database.
Relational database stores the data in table format where as no sql database stores the data as document for high scalability.
NoSQL database stores the data as key value.
There...
July 08, 2017
AWS Lambda and Pricing
Lambda is a compute service where you can upload your code to and your code will be executed on your behalf using Amazon infrastructure.
Each piece of your code is called a function on the Lambda platform.Using Lambda is bit like porting your code to a server except that you don’t have to manage...
Wednesday, 5 July 2017
July 05, 2017
Create Docker image and push it to Docker Hub
In this tutorial, you will learn about docker containers, creating docker images and push the docker images to Docker Hub(hub.docker.com/)registry.
What is docker and what is a container ?
Docker is a tool, which allows deploying the applications in a container to run on the host operating system.
Container allows developer to package an application with all the required modules into a single standard...
Monday, 3 July 2017
July 03, 2017
Route 53 pricing
AWS charges only for configured Hosted zones and number of dns queries aws answers.
Per Month :
$0.50/hosted zone upto 25 hosted zones
After 25 hosted zones,
$0.10/hosted zone will be charged.
Traffic Flow :
Aws charges $50.00/policy record / month.
Standard Queries /month :
$0.40/million - first 1 Billion queries
$0.20/million - over 1 Billion queries
Geo DNS queries :
$0.70/million queries...
Saturday, 1 July 2017
July 01, 2017
Route53 - ChangeResourceRecordSet - Update issue
params = {
"HostedZoneId": '/hostedzone/hotedzone id', // our Id from the first call
"ChangeBatch": {
...
July 01, 2017
Access Denied - Route53 - AWS - Create IAM policy
Error: User: arn:aws:iam::502616337927:user/example is not authorized to perform: route53:ChangeResourceRecordSets on resource: arn:aws:route53:::hostedzone/W3MS19SVPW6HSSFGDHFGSHDF at Request.ext
To create a dns record, you need an IAM policy attached to the IAM user.
Create IAM Policy
{ "Version": "2012-10-17", "Statement": [ { ...
