Date: Thu, 18 Dec 1997 09:03:01 +0200 From: Nadav Eiron <nadav@barcode.co.il> To: amora@zoom.es Cc: "John S. Dyson" <toor@dyson.iquest.net>, questions@FreeBSD.ORG Subject: Re: MFS related questions Message-ID: <3498CAA5.5B88@barcode.co.il> References: <199712162137.WAA09873@silvester.zoom.es> from "Jesus A. Mora Marin" at "Dec 16, 97 09:38:08 pm" <199712172101.WAA10767@silvester.zoom.es>
next in thread | previous in thread | raw e-mail | index | archive | help
Jesus A. Mora Marin wrote: > > Thank you, John. > > > MFS performs very well in FreeBSD. Paging only happens when the > > files on the MFS filesystem get too big. There is a signficant > > design flaw that the buffer cache is synced into the MFS server, > > but that really doesn't have a severe performance hit. > > Yes, I think this point was remarked in McKusick et al's book (pp 305 > & 306). It seems this flaw was a result of the virtual memory system > implementation when MFS was originally designed. > > Well, I have thought further about this subject and guess that the > MFS_ROOT specifies the size of the mfs root directory when mounted, > but I assume this value can be overridden by actual parameters in the > mfs_mount command. > No. MFS_ROOT is an option to make the root filesystem (i.e. /) an MFS system, whose content is compiled into the kernel. See the section in the handbook about making a bootable floppy (somewhere under backup) for the details. This is how the installation floppy works. > One last question: how many mfs filesystems can be mounted at any > time? > > Jesus > ------ > Jesus A. Mora Marin, MD. (aka EA7HAC, ex-EC7DVE) Nadav
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3498CAA5.5B88>