Different Storage Domains in Oracle Linux Virtualization Manager

Introduction

Oracle Linux Virtualization Manager (OLVM) is a comprehensive cloud and virtualization management platform for enterprises. It provides an easy and reliable way for businesses to manage their virtualization infrastructure. This article will discuss the different storage domains available in OLVM and how they can be used to provide a high-performance and reliable environment for virtual machines.

Local Storage Domain

Local storage domains are the simplest and most straightforward form of storage available in OLVM. These domains are created directly on the host and can be used to store virtual machine images. This type of storage provides the highest performance, as the data is stored directly on the physical host. However, it is not suitable for large scale deployments, as data is stored on a single physical host.

NFS Storage Domain

Network File System (NFS) storage domains provide an easy way to store virtual machine images across multiple physical hosts. These NFS storage domains are created on a central server and allow the data to be accessed from multiple physical hosts which leads to a higher level of scalability and flexibility for larger deployments. However, NFS storage domains can also be utilized for smaller deployments as well, since they can provide a straightforward way to share data and resources among multiple physical hosts. Moreover, this type of storage solution offers a great degree of convenience and is highly reliable, as the data is stored in a centralized location. This makes it easy to access the data and resources from any of the physical hosts, ensuring that the data is always available. Consequently, NFS storage domains are an excellent choice for both large and small deployments.

iSCSI Storage Domain

iSCSI storage domains provide a high-performance storage solution for virtual machines, offering increased scalability, performance, and security. By creating a dedicated storage server, multiple physical hosts can access the data, thus providing a higher level of scalability and performance than if the data was stored in a decentralized manner. Moreover, the security of the data is improved, as it is encrypted and stored on a secure server, thus adding an extra layer of protection. With its ability to provide a high level of scalability, performance, and security, iSCSI storage domains make an ideal storage solution for virtual machines.

Conclusion

Oracle Linux Virtualization Manager provides a comprehensive cloud and virtualization management platform for enterprises. It provides multiple storage domains for businesses to store their virtual machine images. Local storage domains provide the highest performance, while NFS and iSCSI storage domains provide greater scalability and security. Businesses should choose the storage domain that best meets their needs in order to provide a high-performance and reliable environment for their virtual machines.

All About Data Domains in Oracle Linux Virtualization Manager

Introduction

Data domains are one of the fundamental building blocks in Oracle Linux Virtualization Manager (OLVM). This blog post will look at the different data domains available in OLVM and explain how they work together.

Network Domains

Network domains are a vital component of a virtual system, as they are responsible for defining the virtual networks that virtual machines and applications can connect to. Additionally, network domains contain important settings such as VLANs, which help to segment the network so that only certain systems can communicate with each other, as well as security policies, which are used to regulate the access of certain users to the network, and routing information, which is used to direct network traffic to the correct destination. All of these settings are crucial for ensuring the smooth functioning of the virtual system.

Storage Domains

Storage domains are the physical storage locations for virtual machines and other resources, such as databases, applications, and operating systems. Storage domains can be shared among multiple virtual systems, allowing for great flexibility when it comes to allocating resources. Settings such as RAID levels, LUNs, and quotas are all managed within the storage domains, ensuring that all virtual machines and other resources have the appropriate configuration for optimal performance. The ability to share storage domains across multiple virtual systems also helps reduce the overall cost of storage, as resources can be allocated in the most efficient manner possible.

Compute Domains

Compute domains are the physical computing resources that are used to deploy and run virtual machines, applications, and services. These domains contain customized settings such as CPU, memory, and networking configurations that are tailored to the specific needs of the applications and services running on them. These settings are essential to ensure the optimal performance of the compute resources and allow them to process data quickly and efficiently. Additionally, the compute domains can be scaled up or down based on the changing needs of the applications and services they are supporting. This scalability ensures that the compute resources are always up to date and able to handle the current workloads.

Conclusion

Data domains are an important part of Oracle Linux Virtualization Manager, and they provide the foundation for creating and managing virtual systems. Network, storage, and compute domains are all necessary for a successful virtual environment.

Oracle VM Disaster Recovery

A lot of my clients ask me about Disaster Recovery in a OVM setup. I hope this new event of oracle gives us some more insight. You can register here. I’ll certainly check it out. The whitepaper the event is based on can be found here.

Consistency between the Primary and DR site is not handled in this paper.According to Oracle this is a task for the application (f.e. Dataguard ) or the Storage layer (f.e. EMC Recoverpoint ). The white paper handles all the necessary tasks to make sure vm’s can be seen and started on the DR site. I hoped there was more possible with the tight integration of UEK and OVM. But offcourse, is that really needed when you can already have consistency solutions on storage/application level?

I believe VMWare has some solutions for this. Anyone care to elaborate on those?

 

 

Installing rlwrap on Linux saves you time

Small Blog entry to spread the word. I hate having to manage a Linux system without this 😉 

rlwrap is an utility that allows you to use up and down arrows in the various commands like sqlplus, rman, adrci, … 
To enable it, you only have to do the following : 

• Install readline-devel
  

  (root) # yum install readline-devel

• Download latest rlwrap from http://utopia.knoware.nl/~hlub/uck/rlwrap/ and unzip it somewhere and Compile it.
  

  (root) # ./configure
  (root) # make
  (root) # make install

• For OL6 you can use this RPM instead of manually making it:
       http://rpm.pbone.net/index.php3/stat/4/idpl/15282330/dir/redhat_el_6/com/rlwrap-0.37-1.el6.i686.rpm.html

  Then install it with :

  (root) # yum install rlwrap-0.37-1.el6.i686.rpm

• Configure aliases in .bash_profile so that rlwrap gets enabled when you start the command
  

  alias sqlplus=”rlwrap sqlplus”
  alias dgmgrl=”rlwrap dgmgrl”
  alias rman=”rlwrap rman”
  alias lsnrctl=”rlwrap lsnrctl”
  alias asmcmd=”rlwrap asmcmd”
  alias adrci=”rlwrap adrci”
  alias impdp=”rlwrap impdp”
  alias expdp=”rlwrap expdp”

You’ll never go back again 😉