Article View: comp.dcom.lans.misc
Article #309Re: Disk cache on PC workstation for Novell server drives???
From: Ken Lam
Date: Sat, 21 Nov 1992 20:50
Date: Sat, 21 Nov 1992 20:50
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3449 bytes
rfranken@mcs213d.cs.umr.edu (Richard Brett Frankenberger) writes: >In article <rdempste.9.722354510@unpcs1.cs.unp.ac.za> rdempste@unpcs1.cs.unp.ac.za (Rob Dempster) writes: >>I am currently in the process of considering migrating to Windows 3.1 >>I am running Windows 3.1 on a 25Mhz 80486SX with 8 MB of RAM and a 40 MB hard >>disk. I have a 2 MB SMARTDRV disk cache running and this makes the software >>that I run from the hard drive very snappy. Unfortunately I also have to pull >>some applications of a Novell LAN server and this really slows things down. >>I have tried some fixes such as putting my Borland C include files on the >>local hard drive. I would have put the library files there as well but don't >>have the space. So at the moment it seems that I will have to get a larger >>drive or find a driver similar to SMARTDRV that works with Novell file >>server drives? I would be most interested to hear whether such a driver >>exists or alternatively any other advice that would be useful. > >I doubt you'll have too much luck, though -- First, most disk caches cache at >the cluster level. There is no such thing on server drives - they are >strictly file oriented - not block oriented (i.e. there is no such thing as an >INT 25 call on a server drive - where caching frequently takes place) ... so >it would require more than eliminating the check that locks out network drives >in SMARTDRV.EXE - it would have to be redesigned to cache at the file level. > >Also (although this shouldn't preclude a network cache - there are lots of other >programs that can be dangerous if used incorrectly), caching some network >drives would be harmful (i.e. a drive containing a database file that is >being continually updated by many users - how would file locks work - you >lock a record, then I go to read it - I shouldn't be able to do so, but I am >because its in my cache, so the server never gets asked) - but programs >(such as C or whatever) that aren't being changed should be able to be cached. > You can specify in your shell.cfg or net.cfg to have some cache buffers set. These are 512 byte buffers. You should use multiples of 8 or 16 because of the block sizes used by Netware(2.xx and 3.xx respectively). cache buffers = ??? This doesn't cache shareable files and I don't know how much benefit it will give. That depends on what you are running. Ken -- Ken Lam (803)-884-7615 (H) System Administrator (803)-792-4969 (W) Senior Systems Consultant (803)-792-5446(FAX) Netware/UNIX System Programmer/Integrator lam@jove.cofc.edu MultiMedia Works & Video Productions ======= Teaching the world in better ways
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Newsgroups: comp.dcom.lans.misc Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!emory!swrinde!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!mrcnext.cso.uiuc.edu!lam From: lam@mrcnext.cso.uiuc.edu (Ken Lam) Subject: Re: Disk cache on PC workstation for Novell server drives??? References: <rdempste.9.722354510@unpcs1.cs.unp.ac.za> <1992Nov21.163525.17203@umr.edu> Message-ID: <By3381.C0C@news.cso.uiuc.edu> Sender: usenet@news.cso.uiuc.edu (Net Noise owner) Organization: University of Illinois at Urbana Date: Sat, 21 Nov 1992 20:50:23 GMT Keywords: disk cache network Lines: 48