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#13 Re: Working with network block devices Posted by Anonymous (68.229.xx.xx) on Fri 14 Sep 2007 at 23:48 I've used iSCSI (openiscsi initiator + iSCSI Enterprise Target) to export logical volumes out as block devices. Then on remote hosts using Xen or KVM/Kqemu/qemu I could use those as disks and have the install cdroms partition them and format them as if they were real disks. Using iSCSI alone doesn't provide you a way to share a single file system out among multiple VMs or machines like running OSCFv2 on iSCSI or GFS on GNBD or iSCSI, but it's nice for sharing disk space. Also iSCSI is very robust and this method allows you to support non-Unix-like systems (aka Windows). If you do a good job designing your network with good nic cards that support jumbo packets and good switches that also support large MTU sizes.. and maybe through a couple bonded gigabit nic interfaces you can get VERY close to native disk speeds. Faster then NFS, generally. But unlike NFS your severely limiting the number of clients you can support.

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