Michael MacIsaac wrote: > "This is done by LVM or raid-tools striping (RAID 0)"
For a single file read or write, LVM or software striping is indeed needed to get any advantage of pathing. However, in a large environment, with many files open, there is actually a lot of concurrency over the channels, even without LVM or striping. The currency is most noticed when doing I/O for several large, non-memory resident, files at the same time. LVM (2.4.7) has several advantages: 1) very much larger volume sizes 2) easier adminstration of volumes 3) Concurrent I/O over multiple channels for a single file (assuming you've striped the logical volume) 4) Same choice of file systems In fact, I am getting good performance results with LVM with striped logical volumes using JFS and I get lot fewer broken volumes. Regards, Jim Linux S/390-zSeries Support, SEEL, IBM Silicon Valley Labs t/l 543-4021, 408-463-4021, [EMAIL PROTECTED] *** Grace Happens ***
