Glossary of RHEV/Ovirt terms ( Data Center, Storage Domain, SPM , Cluster, Hypervisor, VDSM..etc)

Data Center (DC):

It is the logical entity which consists of different clusters .. Clusters are made by number of hypervisors.. You can have more than 1 cluster in a DC.

 

Cluster:

As mentioned Cluster built by group of hypervisors.. The cluster has to be defined for a particular ‘processor’ type. For ex: You can not mix INTEL and AMD  hypervisors in the same cluster as of now.

 

RHEL or RHEV- hypervisor :

Refer #https://humblec.com/difference-between-kvm-and-rhevovirt/

RHEV-M ( RHEV Manager) : 

You got the answer from above URL.

VDSM:

The service running on RHEL or RHEV-Hypervisor which talks to RHEV Manager . This service listens on port 54321.

rhevm or jboss service :

The main service running on RHEV manager..

STORAGE DOMAIN :

This is the shared storage in a RHEV setup where Virtual Machines are hosted.. There are different protocols supported in a RHEV environment to create a storage domain.. NFS/ISCSI/FC ..etc.. When you create a storage domain there is a volume group created ( in case of FC/ISCSI) with NFS it is a file ..

STORAGE POOL MANAGER:  ( SPM)

In simple terms, there should be one server who controls access to the common/shared storage .  The SPM server do this job. There should be only one SPM per DC.  Any of the active host can be elected as a SPM server..

 

I am putting  “.” Here..  Let me know if you need anything need to be expanded or explained..

 

Additional Info:

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Virtualization/3.0/html-single/Installation_Guide/index.html

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Virtualization/3.0/html/Technical_Reference_Guide/chap-Technical_Reference_Guide-Storage_Architecture.html

www.ovirt.org/wp-content/uploads/2011/11/ovirt-vdsm-storage.pdf