weiss@watson.seas.ucla.edu (Michael Weiss) (05/12/91)
Does anyone happen to know if you can use server disk space for Virtual Memory? I realize that it would be lower than the 7-year itch, but since VM is supposed to be for those rare occasions when you REALLY need it... -- \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | / - Michael Weiss weiss@watson.seas.ucla.edu | School of Engineering and - - izzydp5@oac.ucla.edu | Applied Science, UCLA - / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | \
mlbarrow@athena.mit.edu (Michael L Barrow) (05/13/91)
In article <2728@lee.SEAS.UCLA.EDU> weiss@watson.seas.ucla.edu (Michael Weiss) writes: Does anyone happen to know if you can use server disk space for Virtual Memory? I realize that it would be lower than the 7-year itch, but since VM is supposed to be for those rare occasions when you REALLY need it... -- \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | / - Michael Weiss weiss@watson.seas.ucla.edu | School of Engineering and - - izzydp5@oac.ucla.edu | Applied Science, UCLA - / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | \ NO! NO! NO! You can't do this & with good reason. VM is slow as it is being on a secondary storage device. I wouldn't want to wait for pages to swap over a network! A general note to anyone: If you don't know that much about VM and how it's to be used, grab a good intro book on UNIX or Operating Systems. The network disk for VM space concept is clearly against the VM philosophy! -- ======================================================================= | Michael L Barrow | "If any of the above offended you, it was | | <mlbarrow@mit.edu> | my idea to do it -- not MIT's" | |---------------------------------------------------------------------| | Consultant | MIT Computing Support Services (CSS) | | Member | Student Information Processing Board (SIPB) | | Student | Computer Engineering Major, '93 | =======================================================================
krk@cs.purdue.EDU (Kevin Kuehl) (05/13/91)
In article <MLBARROW.91May12184059@mountain-dew.mit.edu> mlbarrow@athena.mit.edu (Michael L Barrow) writes: > Does anyone happen to know if you can use server disk space for Virtual > Memory? I realize that it would be lower than the 7-year itch, but since > VM is supposed to be for those rare occasions when you REALLY need it... >NO! NO! NO! > >You can't do this & with good reason. VM is slow as it is being on a >secondary storage device. I wouldn't want to wait for pages to swap over >a network! I am sure that all those people out there with diskless Sun 3/50's and 3/60's would agree with you. But you can do it and people have done it for years. (Dare I say close to a decade?) >A general note to anyone: If you don't know that much about VM and how >it's to be used, grab a good intro book on UNIX or Operating Systems. A general note to those who preech: If you don't know your history be prepared to be told you are wrong. How do you think all of those diskless Suns out there do virtual memory? No, they do not have tiny little disks hidden in them. They swap over the network. It is not bad if you have at least 8 meg of memory. But I still wouldn't trade my IPC for it. :-) >The network disk for VM space concept is clearly against the VM >philosophy! To the best of my knowledge, there is not such thing as a VM philosophy. If you have a fiber-optic network or most of your machines have 4 meg or more, I don't think swapping over a network would be that bad. Probably not nearly as bad as having to keep stopping and restarting Word 4 on a Mac Plus. -- Kevin Kuehl krk@cs.purdue.edu kuehlkr@mentor.cc.purude.edu
jackb@MDI.COM (Jack Brindle) (05/14/91)
In article <MLBARROW.91May12184059@mountain-dew.mit.edu> mlbarrow@athena.mit.edu (Michael L Barrow) writes: >In article <2728@lee.SEAS.UCLA.EDU> weiss@watson.seas.ucla.edu (Michael Weiss) writes: > > > Does anyone happen to know if you can use server disk space for Virtual > Memory? I realize that it would be lower than the 7-year itch, but since > VM is supposed to be for those rare occasions when you REALLY need it... > > >NO! NO! NO! > >You can't do this & with good reason. VM is slow as it is being on a >secondary storage device. I wouldn't want to wait for pages to swap over >a network! > >A general note to anyone: If you don't know that much about VM and how >it's to be used, grab a good intro book on UNIX or Operating Systems. >The network disk for VM space concept is clearly against the VM >philosophy! > Which, of course, is exactly why SUN uses the network disk for its VM storage on diskless Sparcstations (that and the fact that there is NO local disk...). Now if the Mac could use its AppleShare servers for VMspace, we could slow down to Sparc speeds... Note to flamers - I am writing this on a Sparc. The Network REALLY affects the speed of the machine's operation. In order to avoid VM swapping, our Sparcs have LOTS of memory (12 megs or so). Still, my IIci (and its 120 megs of local storage) runs circles around the Sparc... Jack Brindle ham radio: wa4fib/7