[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] disks under migration
> How does live (or normal) migration handle the disks involved? > Are they transfered, or does the xfrd keep some sort of channel open? xend currently doesn't give you any help and do this automatically, but its something we might add in the future. For most of our VMs we either use NFS root to a central server, or iscsi direct to a SAN, so there's no block device as such to migrate.[*] If you do want to access back to a local drive, then you'll need to set this up yourself. There are a bunch of network block device options available, all of which should work: iscsi, NBD, ENBD, GNBD. We could add the equivalent of the vif-bridge script to xend for block devices. This would provide simple hooks to enable the block device export/import to be set up. However, chances are we'd want this to be stateful and smarter, so its probably best to do a xend plugin rather than just use scripts. > And I assume a saved domain that is restored on another host must have > all its disk and swap space transfered to the new host as well, correct? Yep. No auto magic, not yet ;-) Ian [*] Even using iscsi, there are some situations where you'd prefer to have the iscsi driver in domain 0 and export the disk as a block device to other domains. For example, if you have a hardware iscsi initiator in the machine. In this instance, you'd prefer to move the iscsi disk as part of the migrate. ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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