On Wed, Sep 09, 2009 at 11:57:07AM +0100, Daniel Bye wrote: > On Tue, Sep 08, 2009 at 07:52:59PM -0400, Jerry McAllister wrote: > > On Tue, Sep 08, 2009 at 04:51:20PM -0500, Peter Steele wrote: > > > > > Are there any advantages to using mdconfig and creating a virtual disk > > > for swap space as opposed to having a designated swap partition? For > > > example, I could do something like this: > > > > Unless I am missing something basic here, it seems like a bad idea to > > me - to carve out and use up some memory to use as extra storage for > > processes that need more memory that you have taken away to give to swap. > > That is self defeating. > > > > In addition, one use of swap is to write dumps to if there is a crash. > > If you put it in memory, it is gone when you reboot. > > He's talking about using a swap file, rather than a dedicated partition on > the disk, not in RAM! Although it is slightly slower, as Chuck has already > pointed out, it might, in certain circumstances, be a somewhat more > convenient solution than repartitioning/reinstalling the whole system. > > And as RW has said, the facility already exists and can be enabled with a > couple of knobs in /etc/rc.conf.
I understand using a file and making it in to swapspace. I have used that a couple of times when I needed to add some swap space temporarily. But isn't the command he is trying to use (mdconfig) for creating a memory filesystem - eg use a chunk of memory and make a file from it (then use it for swap or whatever)? That is in RAM. ////jerry > > Dan > > -- > Daniel Bye > _ > ASCII ribbon campaign ( ) > - against HTML, vCards and X > - proprietary attachments in e-mail / \ _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"