Boaz Harrosh wrote: [] > If your target is a SCSI target you can gain up to 15% by using > sg. Search on the net for the "sg utils" package. The source code > of sg_dd and others are a grate example of how to do it. > > Other wise O_DIRECT is your friend. Also look for asynchronous > I/O so you have a few pending IO buffers to keep the pipes full.
What's the advantage of sg_io over O_DIRECT to the block device? I think sg devices are being (slowly?) obsoleted since most stuff which has been in sg now works over normal block device, no? At least, I haven't seen any significant difference between sg_dd and dd with oflag=direct. Thanks. /mjt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
