>consolidating these writes in host cache eliminates some redundant disk >writing, resulting in more productive bandwidth ... providing some ability to >tune the consolidation time window and/or the accumulated cache size may >seem like a reasonable thing to do, but I think that it's typically a moving >target, and depending on an adaptive, built-in algorithm to dynamically set >these marks (as ZFS claims it does) seems like a better choice
But is seems that when we're talking about full block writes (such as sequential file writes) ZFS could do a bit better. And as long as there is bandwidth left to the disk and the controllers, it is difficult to argue that the work is redundant. If it's free in that sense, it doesn't matter whether it is redundant. But if it turns out NOT to have been redundant you save a lot. Casper _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
