May 2, 2019 Vignesh Sathiyanantham

Failure rate depends more on the number of disk blocks modified since the last snapshot of the EBS volume than the total size of the volume. EBS has a listed failure rate of 0.1% – 0.4% annually, compared to a commodity disk’s rate of 4%. At first glance, this appears to be great, but this is somewhat misleading as any real production setup will use some sort of RAID. Using a RAID 1 with two drives failing at 4% would give a failure rate of 0.16% annually, which appears to be line with EBS. As long as the failed drive…

December 14, 2018 Vignesh Sathiyanantham

Like every computer needs harddisk VM or Cloud Instances are no exception. In Amazon, EBS is the virtual hard disk for your EC2 instances, it stores data as blocks and it is like a traditional file system you can format it with any file system and use EBS is not a stand-alone storage, you cannot use EBS volumes like S3 and unlike VMware Virtual Disks you cannot share the EBS between instances at the same time. Until 2012 Amazon had a single type EBS volumes The magnetic standard volume then they had another two more types ( General Purpose SSD and…

September 24, 2018 Vignesh Sathiyanantham

For Amazon Linux 2 or the Amazon Linux AMI, the username is ec2-user.For a Centos AMI, the username is centos.For a Debian AMI, the username is admin or root.For a Fedora AMI, the username is ec2-user or fedora.For an RHEL AMI, the username is ec2-user or root.For a SUSE AMI, the username is ec2-user or root.For an Ubuntu AMI, the username is ubuntu.

August 17, 2018 Vignesh Sathiyanantham

To increased security to your AWS root account, Amazon web services recommend configuring multi-factor authentication (MFA) to help protect your AWS resources. MFA adds extra security because it requires users to type a unique authentication code from an approved authentication device or SMS (Short Message Service) text message when they access AWS websites or services. Security token-based type of MFA requires you to assign an MFA device (hardware or virtual) to the IAM user or the AWS account root user. A virtual device is a software application running on a phone or other mobile device that emulates a physical device. Either…

July 25, 2018 Vignesh Sathiyanantham 1Comment

While having the discussion at Nimesa about the cost-saving options for AWS cloud, we found one of the most costly of AWS sins is the pervasive habit of running dev test EC2 instances after business hours. Whether you are leaving AWS instances running that were intended for short-term use or running dev-test, pre-prod, developer instances outside of business hour, the effect on your total bill can be massive. One of the best ways for cost saving on your AWS spend is to shut down your Dev/ Test AWS Instances outside of business hours and during weekends. But to turn on and off…

July 7, 2018 Vignesh Sathiyanantham

Cloud Server/network outages are wrecking balls, and it can happen with a dominant market player like the Amazon Web Services (AWS), The latest is an extensive outage brought on by a human error at an AWS data center in Virginia. Many consider it to be the worst hit in four years. And in June 2016: The storms that battered Sydney also shook AWS services. An extensive power outage led to the failure of a number of Elastic Compute Cloud (EC2) instances and Elastic Block Store (EBS) volumes, many of which hosted critical workloads for big brands. The result was that…

January 28, 2018 Vignesh Sathiyanantham

Cloud computing came through long way by replacing layer after a layer we used bare metal server then Virtual servers then Containers now Serverless computing Serverless is the next evolution of application and system design and deployment. Serverless applications are built upon functions—small code artifacts, which are compact and specific to a disc Serverless doesn’t mean servers are no more required to run workloads, it simply means that developers no longer have to think about them, this will make the developers focus more on tasks than servers. Serverless is often called as Function as service Amazon AWS has FaaS called…

January 28, 2018 Vignesh Sathiyanantham 29Comment

AWS Lambda lets you run code without provisioning or managing servers. You pay only for the compute time you consume – there is no charge when your code is not running. With Lambda, you can run code for virtually any type of application or backend service – all with zero administration. Just upload your code and Lambda takes care of everything required to run and scale your code with high availability. You can set up your code to automatically trigger from other AWS services or call it directly from any web or mobile app. In my last post, i wrote…

January 22, 2018 Vignesh Sathiyanantham 1Comment

Recently, An Indiana hospital paid a ransom of $55,000 to get rid of ransomware that had infected its systems and was hindering operations. when attackers breached the network of Hancock Health, a regional hospital in the city of Greenfield, Indiana. Hancock Health CEO Steve Long said the hackers are believed to be in eastern Europe and may have used a type of ransomware called SamSam, SamSam encrypted files and renamed them with the phrase “I’m sorry”, according to a local newspaper who broke the news. The hospital said that despite having backups it opted to pay the ransom demand of…