Re:Re: [Xen-users] iscsi vs nfs for xen VMs

[yue <ooolinux@xxxxxxx>]

do you have success experence on deploying clvm+iscsi? 

sometimes image is more comfortably, migration, easy copy,

thanks,

----------------------------------------

At 2011-01-26 18:38:52，"Christian Zoffoli" <czoffoli@xxxxxxxxxxx> wrote:

>Hi,
>
>if you want to push on performance the best one is:
>
>CLVM over iSCSI
>
>if you need fully redundancy you have to double everything:
>- switches
>- network ports
>- PSUs
>
>and
>
>- storages.
>
>If you want to a completely redundant storage solution you can use DRBD
>in active-active
>
>Just some notes:
>- VMs over files over NFS is slow (only some vendors have a relative
>fast NFS appliance).
>- VMs over files over a cluster FS is slow
>
>everytime you add a layer (in particular a clustered FS layer) your
>performances drop down ... so make it simple
>
>
>Best regards,
>Christian
>
>P.S. another interesting approach would be NFS over RDMA (infiniband)
>...most of the advantages of NFS with less disadvantages compared to NFS
>over TCP/IP
>
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