I'm researching the best way to start offering virtual services to our hostingclients and to virtualize our current servers for quicker disaster recovery.
I've learned a lot in the last couple of weeks but still have the feeling i'm only seeing part of the picture.
By posting this I hope to get some more views and ideas to investigate.
If this is not the approriate place for this I apologize and I hope the Mods will move this post to a more approriate section.
One of the great features of OpenVZ en Virtuozzo is the ability to do live migrations without a central storage.
The trade-off is that the containers are not as well separated from the coresystem as on XEN or VMware and one container can in theorie pull down a complete node.
With XEN and VMware you need SAN to use this great live migration feature.
The costs to setup a redundant iSCSI SAN (raid-5 or 6) are high. And you actually need two because, what good is a backup of the files if the MB or raidcontroller of your SAN died and you have to wait two days for a new one...
But since almost everyone seems to use them in combination with virtualization projects I must be missing some important points.
What are the advantages of SAN over local storage?
Why would anyone use SAN on OpenVZ and Virtuozzo systems?
I've learned a lot in the last couple of weeks but still have the feeling i'm only seeing part of the picture.
By posting this I hope to get some more views and ideas to investigate.
If this is not the approriate place for this I apologize and I hope the Mods will move this post to a more approriate section.
One of the great features of OpenVZ en Virtuozzo is the ability to do live migrations without a central storage.
The trade-off is that the containers are not as well separated from the coresystem as on XEN or VMware and one container can in theorie pull down a complete node.
With XEN and VMware you need SAN to use this great live migration feature.
The costs to setup a redundant iSCSI SAN (raid-5 or 6) are high. And you actually need two because, what good is a backup of the files if the MB or raidcontroller of your SAN died and you have to wait two days for a new one...
But since almost everyone seems to use them in combination with virtualization projects I must be missing some important points.
What are the advantages of SAN over local storage?
Why would anyone use SAN on OpenVZ and Virtuozzo systems?