Sunday , December 21 2014


Nutanix – Web-Scale Converged Infrastructure

Nutanix logo

The entire world’s IT infrastructure  is driving towards the virtualization to reduce the IT costs by consolidating the small and mid-range workload environments. When it comes to Virtualization, hypervisors are ruling the market and VMware is top among those. Microsoft Hyper-V,Oracle VM for X86 and Redhat Enterprise  Virtualization(RHEV) also competing with each other on the hypervisor market along with VMware. Now the questions is ... Read More »

LDOM – How to find the physical Memory size ?


In UnixArena,we have talked more about LDOM aka Oracle VM for SPARC.But this article will provide the solution to identify the installed physical memory of the server from control domain. There is no direct command available to find out the total physical memory and un-allocated memory  from control domain.Once you have set the resources limit to control domain, all the ... Read More »

Dynamically Adding Memory CPU to VM on VMware


VMware vSphere’s hot-add Memory and hot-plug CPU functions allow you to add the CPU and Memory while virtual machine is up and running. It will help you to add the additional  resources whenever required and  no need to bring down the VM for each time.But  you can’t remove the resources once you have added the VM while its  running.This Hot-add ... Read More »

Oracle Solaris 11 – Beginners Guide

Learning Path Solaris 11

If you are working as a Sun Solaris system administrator, you know that how rapidly Solaris  operating system  is changing from version to version. There were  a lot difference between Solaris 9  and Solaris 10. But people were able to grab the changes quickly in the past when it was transformed from Solaris 8/9 to Solaris 10. ZFS and Zones ... Read More »

VMTurbo 5.0 – Control in the Software Defined Universe


Virualization is very powerful technology but  it comes with greater responsibility as well. If you do not configure or maintain your virtual environment properly, it will affect whole environment. Do you would like to know how ? In most of the cases , SAN storage systems will be shared for all the physical and virtual environments. If you do more ... Read More »

Exadata Storage Cell Commands Cheat Sheet

Quick Reference

It is not an easy to remember the commands since most of the UNIX administrators are working on multiple Operating systems and different  OS flavors. Exadata and ZFS appliance are adding additional responsibility to Unix administrator and need to remember those appliance commands as well. This article will provide the reference to all Exadata storage cell commands with examples for ... Read More »

Exadata – Distributed Command-Line Utility (dcli) – Part 6

Exadata cell

Distributed command line utility(dcli) provides an option to execute the monitoring and administration commands on multiple servers simultaneously.In exadata database  machine , you may need to create the griddisks on all the exadata storage cells frequently. Each time , you need to login to all the storage cells and create the griddisk manually.But dcli will make our life easier once you ... Read More »

Exadata Storage Cell – Administrating the Disks – Part 5

Exadata storage cell disks

Exadata Storage server uses the cell software to manage the disks. Like volume manager, we need to build couple of virtual layers to get the grid disks.These griddisk will be used  to create the ASM disk group on the database level . In this article, we will see that how we can create/delete the celldisk, griddisk,flashcache & flashlog using the ... Read More »

Exadata – CELLCLI command Line Utility1 – Part 4


Exadata storage is managed by CELLCLI command line utility. Management process (MS) will communicate with cellcli to maintain the configuration on the system. CELLCLI utility can be launched by user  “celladmin” or “root”. In this article ,we will see how to list the storage objects and how to stop/start the cell services using the CELLCLI utility.At the end of the ... Read More »

Exploring the Exadata Storage Cell Processes – Part 3

Exadata storage cell

Exadata storage cell is new to the industry and only oracle is offering such a customized storage for oracle database. Unlike the traditional  SAN storage ,Exadata data storage will help to reduce the processing at the DB node level. Since the exadata storage cell has its own processors and 64GB physical memory , it can easily offload the DB nodes. ... Read More »

Architecture of Exadata Database Machine – Part 2

Exadata Network Architecture

Exadata Database machine provides a high performance,high availability and plenty of storage space platform for oracle database .The high availability clustering is is provided by Oracle RAC and ASM will be responsible for storage mirroring .Infiniband technology provides high bandwidth and low latency cluster interconnect and storage networking.  The powerful compute nodes joins in the RAC cluster to offers the great ... Read More »

Exadata DataBase Machine Overview – Part 1

Exadata - Database machine x3-8 Full Rack

This article is going to provide the overview about the Oracle’s Exadata database machine and the  benefits of this engineering system. Oracle Database machine is fully integrated with oracle databases and it uses Exadata storage servers.This machine provides high performance and high availability  for all type of database workloads.It also completely eliminates the all the bottlenecks and mainly IOPS. So ... Read More »