AWS: RAID 0 Configuration on EBS Volumes

Amazon Web Services EBS Volumes provides the block level storage volumes of Amazon EC2 instances. EBS volumes are highly available and reliable storage volumes that can be attached to the EC2 instances of the same Availability Zone over AWS internal network. Elastic Block Storage (EBS) is a storage service that is backed by network-connected block storage. So IOPS performance of an EBS volume is measured by the network throughput between the instance and EBS volume.

Two kinds of EBS volumes available

Standard Volumes offer cost-effective storage and can deliver approximately 100 IOPS on average, or burst of hundreds of IOPS. Standard Volumes size can range between 1 GB to 1 TB.

Provisioned IOPS (PIOPS) Volumes are designed for heavy I/O intensive workloads like databases and consistent high I/O throughput. You can specify an IOPS rate when you create the volume. PIOPS Volumes size can range between 10 GB and 1 TB.

The Standard or Provisioned IOPS Volumes I/O performance will depend on the Volume Size and Instance Type.

RAID on EBS Volumes

To get both a faster I/O performance and more than 1TB of volume sizes, you can create a RAID 0 striping using more than one EBS volume.

Advantage: When we perform the RAID 0 Striping of multiple volumes, IOPS are distributed among the volumes of a stripe. If you add another volume to RAID 0, you get the straight addition of IOPS throughput of that volume and additional volume size.

To take advantage of the RAID 0 striping, the instance type should support the High Networking Performance (like m3.xlarge, c3.2xlarge, r3.2xlarge, etc.).

Disadvantage: Loss of a single volume results in a complete data loss.

To avoid the data loss, we should take Snapshots of the RAID volumes frequently, and suspend the writes while taking the snapshot to ensure data integrity and reliability.

Here we will discuss on how to configure the RAID 0 Striping on 2 EBS volumes of several Linux machines. You can expand this to any number of volumes as per your requirements.

Create RAID Configuration

  1. Create the two EBS volumes with a size of 5 GB and attach them to the Amazon Linux Instance.
  2. Create a RAID 0 striped array using the two attached volumes:
    mdadm –create /dev/md0 –level=0 –level=stripe –raid-devices=2 /dev/xvdc /dev/xvdd
    (Assuming the 2 EBS volumes are attached as /dev/xvdc and /dev/xvdd respectively)
  3. Format the raid volume with your favorite file system:
    mkfs.ext4 /dev/md0
  4. Mount it on a temporary directory:
    mount /dev/md0 /srv/raid0
  5. Create some dummy data on /srv/raid0 directory:
    dd if=/dev/zero of=file1 bs=1024 count=65530 (run it about 10 times)
    It will fill 9GB of information onto the RAID meta device. Both the volumes contains data, given that each volume size is 5 GB.

Snapshot RAID volumes

  1. Create snapshots of the two volumes after suspending writes on those volumes.

Restore RAID Volumes

  1. Create the new EBS volumes from the snapshots we have created before.
  2. Launch an EC2 instance of either Amazon Linux or CentOS and attach the newly created EBS volumes.
  3. You can see the RAID meta device is created automatically by the OS itself. Use the fdisk -l command to check it out. Can you mount on a temporary mount point and verify whether 9GB of data is available or not?
  4. Now, launch an EC2 instance of Ubuntu and attach the newly created EBS volumes.
  5. Run the fdisk –l command and verify whether the RAID meta device created automatically by the OS itself. If not, run the following command to create the RAID meta device
    madam –assemble /dev/md0 /dev/xvdc /dev/xvdd
  6. Now you can see a meta device with the name /dev/md0. You can mount it and check its content.

Hope this article will help you to manage the RAID configuration on EBS volumes to gain the maximum IOPS.

Avatar

Written by

Praveen Kumar Muppala

I have strong experience on Multiple Unix/Linux flavours, LAMP Stack, Monitoring Systems, Database, NoSQL. I love to explore the new concepts/services in Cloud Computing World. I have written 4 certifications in different flavours of Linux/Unix.


Related Posts

Avatar
Sudhi Seshachala
— October 9, 2019

Top 13 Amazon Virtual Private Cloud (VPC) Best Practices

Amazon Virtual Private Cloud (VPC) brings a host of advantages to the table, including static private IP addresses, Elastic Network Interfaces, secure bastion host setup, DHCP options, Advanced Network Access Control, predictable internal IP ranges, VPN connectivity, movement of interna...

Read more
  • AWS
  • best practices
  • VPC
Avatar
Stuart Scott
— October 2, 2019

Big Changes to the AWS Certification Exams

With AWS re:Invent 2019 just around the corner, we can expect some early announcements to trickle through with upcoming features and services. However, AWS has just announced some big changes to their certification exams. So what’s changing and what’s new? There is a brand NEW ...

Read more
  • AWS
  • Certifications
Alisha Reyes
Alisha Reyes
— October 1, 2019

New on Cloud Academy: ITIL® 4, Microsoft 365 Tenant, Jenkins, TOGAF® 9.1, and more

At Cloud Academy, we're always striving to make improvements to our training platform. Based on your feedback, we released some new features to help make it easier for you to continue studying. These new features allow you to: Remove content from “Continue Studying” section Disc...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
  • ITIL® 4
  • Jenkins
  • Microsoft 365 Tenant
  • New content
  • Product Feature
  • Python programming
  • TOGAF® 9.1
Avatar
Stuart Scott
— September 27, 2019

AWS Security Groups: Instance Level Security

Instance security requires that you fully understand AWS security groups, along with patching responsibility, key pairs, and various tenancy options. As a precursor to this post, you should have a thorough understanding of the AWS Shared Responsibility Model before moving onto discussi...

Read more
  • AWS
  • instance security
  • Security
  • security groups
Avatar
Jeremy Cook
— September 17, 2019

Cloud Migration Risks & Benefits

If you’re like most businesses, you already have at least one workload running in the cloud. However, that doesn’t mean that cloud migration is right for everyone. While cloud environments are generally scalable, reliable, and highly available, those won’t be the only considerations dri...

Read more
  • AWS
  • Azure
  • Cloud Migration
Joe Nemer
Joe Nemer
— September 12, 2019

Real-Time Application Monitoring with Amazon Kinesis

Amazon Kinesis is a real-time data streaming service that makes it easy to collect, process, and analyze data so you can get quick insights and react as fast as possible to new information.  With Amazon Kinesis you can ingest real-time data such as application logs, website clickstre...

Read more
  • amazon kinesis
  • AWS
  • Stream Analytics
  • Streaming data
Joe Nemer
Joe Nemer
— September 6, 2019

Google Cloud Functions vs. AWS Lambda: The Fight for Serverless Cloud Domination

Serverless computing: What is it and why is it important? A quick background The general concept of serverless computing was introduced to the market by Amazon Web Services (AWS) around 2014 with the release of AWS Lambda. As we know, cloud computing has made it possible for users to ...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
Joe Nemer
Joe Nemer
— September 3, 2019

Google Vision vs. Amazon Rekognition: A Vendor-Neutral Comparison

Google Cloud Vision and Amazon Rekognition offer a broad spectrum of solutions, some of which are comparable in terms of functional details, quality, performance, and costs. This post is a fact-based comparative analysis on Google Vision vs. Amazon Rekognition and will focus on the tech...

Read more
  • Amazon Rekognition
  • AWS
  • Google Cloud Platform
  • Google Vision
Alisha Reyes
Alisha Reyes
— August 30, 2019

New on Cloud Academy: CISSP, AWS, Azure, & DevOps Labs, Python for Beginners, and more…

As Hurricane Dorian intensifies, it looks like Floridians across the entire state might have to hunker down for another big one. If you've gone through a hurricane, you know that preparing for one is no joke. You'll need a survival kit with plenty of water, flashlights, batteries, and n...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
  • New content
  • Product Feature
  • Python programming
Joe Nemer
Joe Nemer
— August 27, 2019

Amazon Route 53: Why You Should Consider DNS Migration

What Amazon Route 53 brings to the DNS table Amazon Route 53 is a highly available and scalable Domain Name System (DNS) service offered by AWS. It is named by the TCP or UDP port 53, which is where DNS server requests are addressed. Like any DNS service, Route 53 handles domain regist...

Read more
  • Amazon
  • AWS
  • Cloud Migration
  • DNS
  • Route 53
Alisha Reyes
Alisha Reyes
— August 22, 2019

How to Unlock Complimentary Access to Cloud Academy

Are you looking to get trained or certified on AWS, Azure, Google Cloud Platform, DevOps, Cloud Security, Python, Java, or another technical skill? Then you'll want to mark your calendars for August 23, 2019. Starting Friday at 12:00 a.m. PDT (3:00 a.m. EDT), Cloud Academy is offering c...

Read more
  • AWS
  • Azure
  • cloud academy content
  • complimentary access
  • GCP
  • on the house
Avatar
Michael Sheehy
— August 19, 2019

What Exactly Is a Cloud Architect and How Do You Become One?

One of the buzzwords surrounding the cloud that I'm sure you've heard is "Cloud Architect." In this article, I will outline my understanding of what a cloud architect does and I'll analyze the skills and certifications necessary to become one. I will also list some of the types of jobs ...

Read more
  • AWS
  • Cloud Computing