[CentOS] openfiler (was: using CentOS as an iSCSI server?)

Ross Walker rswwalker at gmail.com
Wed Oct 21 03:31:11 UTC 2009

On Oct 20, 2009, at 6:47 PM, Alan McKay <alan.mckay at gmail.com> wrote:

>> I thought the original object was to make the space available to
>> multiple VMware ESX(i) servers so you could vmotion guests among  
>> them.
>> Can ESX construct raids out of multiple iscsi sources?
> Well, my original may have been a bit obtuse because I do not really
> know what I am looking for :-)
> I have a bunch of local disk all over the place.   I eventually want
> to virtualize everything, so I'd like a way to virtualize that
> localdisk and do fancy things with it :-)

If you have a bunch of disperse local disks you could export them via  
iSCSI or AoE or NBD to a head server that could then use mdraid and  
LVM to then aggregate that storage and share it out again to clients,  
ESX hosts and VMs via NFS/CIFS or iSCSI depending on their needs.

I myself use XFS over NFS for guest OS disks, then have iSCSI provide  
storage for the apps inside the guest VMs.

With a good storage controller this proved to be both the best  
performing and easiest to implement.

If you are aggregating disperse storage you could even use simple  
network storage protocols like AoE or NBD on the local storage servers  
and use RAID10 on the head server to make it fault tolerant.


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