This article is going to share very least used SCSI commands on Linux operating systems. These commands will be very useful to identifying SCSI devices and tuneable parameters. There are few utilities which can be used to get the detailed information about the scsi devices. lsscsi is most command tool which scans sysfs pseudo file […]
CLOUD WAR – Openstack vs VMware vSphere vs Amazon AWS
Cloud War or Data-center war ? There is a healthy competition out in the market to reduce the overall operating cost on IT. Companies are benefited with the cloud revolution, Virtualization and automation. Most of the organisations are moving towards asset free to reduce their additional investments on IT equipment. But all the organizations can’t just […]
Oracle Solaris Cluster – Configure Standby Oracle Database – Dataguard – Part 2
Here is the step by step procedure to bring the oracle Dataguard standby instance under sun cluster control.Once you have completed the primary node setup , you are good to proceed with standby configuration. In this oracle Dataguard configuration ,we will be using the standby nodes as DR servers and it must be configured as […]
Oracle Solaris Cluster – Configure Oracle Database with Dataguard- Part 1
This article will provide step by step procedure to manage the oracle Database under Sun-cluster aka Solaris cluster on Oracle Dataguard environment. Oracle Dataguard is widely used product for the disaster recovery solutions.It provides great visibility to database administrator to manage their environment in better manner. Sun-cluster is used only on oracle Solaris operating system […]
Amazon AWS – Change EBS volume type using Snapshot – Part 14
This article will walk through that how to change the AWS EBS volume type using snapshot feature. There is a limitation with AWS that you can’t change the volume type on fly. You must need to halt the instance and change the volume type. But again , you can’t switch to all the volume types […]
Amazon AWS – Change volume type – SSD GP2 to SSD IOPS – Part 13
This article will walk through that how to change the AWS EBS volume type from SSD GP2 to SSD IOPS volume type. Changing the volume type is not straight forward for all the volume types. Due to the instance limitation, you can’t change the volume type on the fly. You need to halt the instance […]
Amazon AWS – Connect to AWS instance using Putty – Part 12
This article will walk through to connect to the AWS cloud instance using putty software from windows laptop. If you use MAC OS or Linux OS , you could easily connect to the AWS instance using the downloaded *.pem key file from AWS Portal. pem key file format is not supported in windows ssh client […]
Amazon AWS – Launching EC2 Cloud Instance – Part 11
This article will walk through to create the first AWS instance and launch it. We will also see that how to access the AWS instance from internet. Configure the virtual firewall to protect the instance from different external attacks by restricting the number of allowed ports. You could also protect the instance against the accidental […]
Amazon AWS – Elastic Block Store – EBS – Overview – Part 10
This article will walk through about Elastic Block Store (EBS) volume and it’s use cases. The last article walk through about EC2 and different prizing options and various type of EC2 instances available in Amazon Public cloud. Before launching the first EC2 instance , you must know about EBS and it’s use. Amazon EBS is persistent […]
Amazon AWS – Elastic Compute Cloud (EC2) – Overview – Part 9
Amazon AWS offers compute space in the cloud. Elastic Compute Cloud (EC2) is a web service that provides re-sizeable compute capacity in the cloud on demand basis. To setup the on-premise computing will take minimum couple of months to make it operational. But in the cloud service based computing will be available in few minutes. […]