mo@uunet.uu.net (Mike O'Dell) (07/26/89)
Actually, it helps in timesharing if you make the changes so that bmap() can tell you if there are some blocks together you could read in one gulp. Our filesystem performance improvements are substantial, and they were done without changing any disk data structures - just policies and algorithms inside the kernel. -Mike
henry@uunet.uu.net (Henry Spencer) (08/09/89)
> Actually, it helps in timesharing if you make the changes so that bmap() > can tell you if there are some blocks together you could read in one gulp. Agreed that keeping blocks together can help even in a multi-user environment, *if* you are running filesystem code that takes more advantage of it than standard 4.xBSD does. That's an important "if". Henry Spencer at U of Toronto Zoology uunet!attcan!utzoo!henry henry@zoo.toronto.edu