On 7/6/2012 2:16 AM, Wojciech Puchar wrote: >> >> You wouldn't partition the large LUN. You'd simply directly format it >> with XFS. Laying a partition table on it would introduce the real > > Fine. i understand that. What i am suggesting is not making large LUNs. > you get the best performance with directly attaching disks to your machine.
That's simply not true. 99% of block latency is rotational. iSCSI packet latency is an order of magnitude less than rotational latency, and fiber channel packet latency is a couple orders of magnitude lower still, even with a couple switches between the server and storage array. Thus it doesn't matter how you attach your mechanical disks to a server, as the latency is in the drives, not the data path. -- Stan
