home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.ms-windows.programmer.win32
- Path: sparky!uunet!paladin.american.edu!gatech!usenet.ins.cwru.edu!agate!spool.mu.edu!yale.edu!ira.uka.de!Sirius.dfn.de!solaris.rz.tu-clausthal.de!root
- From: hochstae@allfiwib1.wiwi.uni-marburg.de (Christoph H. Hochstaetter)
- Subject: Re: WindowsNT: something like smartdrive?
- Message-ID: <1993Jan5.012609.18294@solaris.rz.tu-clausthal.de>
- News-Software: IBM OS/2 PM RN (NR/2) v0.16 by O. Vishnepolsky and R. Rogers
- Lines: 37
- Sender: root@solaris.rz.tu-clausthal.de (Operator)
- Reply-To: hochstae@allfiwib1.wiwi.uni-marburg.de (Christoph H. Hochstaetter)
- Organization: Techn. Univ. Clausthal
- References: <1993Jan4.171030.345@csghsg5a.bitnet>
- Date: Tue, 5 Jan 1993 01:26:09 GMT
-
- In <1993Jan4.171030.345@csghsg5a.bitnet> lmebold@csghsg5a.bitnet writes:
- >
- >Is there a software-driver like smartdrive in windows 3.1 for WinNT?
-
- No, Windows NT has only a single cache for all tasks, that could need
- caching. OS/2 for instance has one cache for HPFS, one for FAT, one for
- CD-ROM, one for network, etc. All these caches are static in size and
- may consume too much memory. E.g. the CD-ROM cache is still there, although
- you have not used the CD-ROM for hours.
-
- Windows NT has only one cache and its size changes dynamically depending
- on resource utiliziation, especially main memory. A major usage for the
- cache is disk-caching of course. You can monitor cache usage by using the
- performance monitor of the NT SDK and add some of the cache items to your
- graph.
-
- >If so - does anyone know, wheter a cache-controller or the software-
- >solution is faster running WinNT?
-
- A caching disk controller speeds up disk I/O of course, but it can only
- be used for that single purpose. On the other hand there is no CPU time
- required for controlling this cache.
-
- >As long as you run DOS/Windows it seems to be better to have a
- >uncached-controller and using smartdrive instead.
-
- Don't trust any benchmarks here. They always give better results for
- software caches, since they read from memory, that does not go through
- your ISA bus.
-
- Christoph
- -------------------------------------------------------+-----------------------
- Christoph H. Hochstaetter, Philipps-University Marburg | Universitaetsstr. 25
- Internet: hochstae@allfiwib1.wiwi.uni-marburg.de | D-W-3550 Marburg
- Bitnet : HOCHSTAE AT DMRHRZ11 | Germany
- Fido : 2:243/660 | Phone +49-6421-28-7092
- Fax : +49-6421-28-4858 |
-