February 1998
- OT: Following in the footsteps of JCL Alex Oren
- OT: Following in the footsteps of JCL Nathan Yospe
- OT: Following in the footsteps of JCL Richard Woolcock
- OT: Following in the footsteps of JCL Chris Gray
- OT: Following in the footsteps of JCL coder@ibm.net
- OT: Following in the footsteps of JCL Marc Eyrignoux
- Ada? Andrew C.M. McClintock
- Monthly FAQ posting Koster, Raph
- Monthly FAQ posting Adam Wiggins
- Monthly FAQ posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Chris Gray
- Monthly FAQ Posting Ling
- Monthly FAQ Posting J C Lawrence
- Monthly FAQ Posting J C Lawrence
- Monthly FAQ Posting Alex Oren
- Monthly FAQ Posting Greg Miller
- Monthly FAQ Posting s001gmu@nova.wright.edu
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling
- Monthly FAQ Posting Ling Lo
- Monthly FAQ Posting Koster, Raph
- Monthly FAQ Posting Ling Lo
- Monthly FAQ Posting Greg Miller
- Monthly FAQ Posting Marian Griffith
- Monthly FAQ Posting Greg Miller
- Monthly FAQ Posting Ling Lo
- Databases Shawn Halpenny
- OT: This is a test coder@ibm.net
- OT: This is a test Alex Oren
- Clients and things [Was: OT: This is a test] Matt Chatterley
- Clients and things [Was: OT: This is a test] coder@ibm.net
- Clients and things [Was: OT: This is a test] Matt Chatterley
- MUD Development Digest Dr. Cat
- DBs and Events Greg Munt
- DBs and Events Nathan Yospe
- DBs and Events Greg Munt
- DBs and Events Nathan Yospe
- DBs and Events Felix A. Croes
- DBs and Events Jon A. Lambert
- DBs and Events coder@ibm.net
- DBs and Events s001gmu@nova.wright.edu
- DBs and Events Jon A. Lambert
- DBs and Events coder@ibm.net
On 10/02/98 at 10:52 AM, Greg Munt <greg@uni-corn.demon.co.uk> said:
>Am looking for some (web) references to disk-based databases. Can anyone
>help? Advantages and disadvantages of using (only) GDBM to provide a mud
>DB?
dbm and most of its extrapolations (including ndbm, gdbm, tdbm and
company) have some fairly severe performance and storage considerations.
There is some (not much) discussion of this at the FreeDB page and in
their relevant documentation. The docs for YOODA and LINCKS I recall also
working over that area lightly. The little work I've done with ndbm has
shown it to be extremely sensitive to its choice of hashing algorithm for
the large-ish databases I was using (2 - 3 million records, frequent
accesses, very infrequent updates, very small records).
The MUD end is of course rarely mentioned. Stephen White goes into it
lightly with his original docs for CoolMUD (still the most elegant and
downright sweet server deisgn I've seen yet), but mostly with the comment
that Marcus Ranum's DB code is par excellant. Marcus Ranum was the
original champion of disk DB's as more performant than in-memory (due to
page fault penalties), and thus wrote UberMUD as a successful proofcase.
You may be able to dig up some docs from him on the area (please repost
here -- I'm extremely interested).
Nathan validly questions the use of a DB at all for a MUD. While I don't
agree with the extent of his argument, I have come to the view that a
classical DB is a questionable choice, and have thus been moving much
loser to a persistant store type model. I'm not aware of much stody in
this area.
>Also, any references to caches?
Most OS and compiler design books (I don't have the dragon book to hand to
check it in particular) have texts on one, two, and three level caches.
There are also a goodly number of web references. One thing I would
remember is that the benefits of cache are incredibly dependant on load
characteristics. Very small changes in the type and pattern of accesses
can vastly increase performance with one cache design while getting little
or even a negative effect with another (cache overhead).
>Any references to Event Management?
Yup. Get "Design Patterns" by the gang of four. Read it. Study it.
Sleep with it. Marry it. Mind meld with it. Incredible book. Worth
thrice its weight in Uranium 238.
>Is there any alternative to using a
>pointer to a function, to store the Event->function()?
Yup, several. I use message passing with the result that the
function/method bindings are very soft. Again, see "Design Patterns".
>(This has the
>disadvantage of every Event->function() needing to have the same number
>and type of parameters being passed to it.)
No, it doesn't. There are many routes around this, encluding casting down
and back up to devalue the argument characteristics, wrapping all
arguments in a structure or class to result in a single argument and than
passing that, not using a function binding at all and using very light
weight message passing, and a very large host of other possibilities.
--
J C Lawrence Internet: claw@null.net
----------(*) Internet: coder@ibm.net
...Honourary Member of Clan McFud -- Teamer's Avenging Monolith...
- (subject missing) Ben Greear
- META: Unsubscribed users dur to bounces coder@ibm.net
- META: Unsubscribed users dur to bounces Adam Wiggins
- Source Code Release Greg Munt
- Source Code Release Ben Greear
- Source Code Release Greg Munt
- Source Code Release Ben Greear
- Source Code Release Greg Munt
- Source Code Release Richard Woolcock
- Source Code Release Ben Greear
- Source Code Release Chris Gray
- Source Code Release Greg Munt
- Source Code Release coder@ibm.net
- Source Code Release Richard Woolcock
- Source Code Release Stephen Zepp
- Source Code Release Jon A. Lambert
- Source Code Release Greg Munt
- Source Code Release Jon A. Lambert
- Source Code Release Greg Munt
- Source Code Release Travis Casey
- Source Code Release Jon A. Lambert
- Source Code Release Jon A. Lambert
- [RESEARCH]MUD articles archive (fwd) Greg Munt
- Socket programming (Was: The impact of the web on muds) Jon Leonard
- Socket programming (was: The impact of the web on muds) Vadim Tkachenko
- Socket programming (was: The impact of the web on muds) Richard Woolcock
- byte-code anyone? Chris Gray
- byte-code anyone? Jon Leonard
- byte-code anyone? Chris Gray
- byte-code anyone? Jon Leonard
- byte-code anyone? Chris Gray
- user-centered design (was Clients) Mike Sellers
- OT: Linux g++ Greg Munt
- OT: Linux g++ Ben Greear
- OT: Linux g++ coder@ibm.net
- OT: Linux g++ Shawn Halpenny
- OT: Linux g++ Chris Gray
- OT: Clients Vadim Tkachenko
- OT: Clients Adam Wiggins
- OT: Clients coder@ibm.net
- META: OS wars coder@ibm.net
- META: OS wars Mike Sellers
- Clients Stephen Zepp
- Moore's Law sucks (was: 3D graphics) Brandon J. Rickman
- Moore's Law sucks (was: 3D graphics) Adam Wiggins
- Moore's Law sucks (was: 3D graphics) Chris Gray
- Moore's Law sucks (was: 3D graphics) coder@ibm.net
- Moore's Law sucks (was: 3D graphics) Brandon J. Rickman
- Moore's Law sucks (was: 3D graphics) Mike Sellers
- Moore's Law sucks (was: 3D graphics) Chris Gray
- Moore's Law sucks (was: 3D graphics) Ben Greear
- Moore's Law sucks (was: 3D graphics) Ling
- Moore's Law sucks (was: 3D graphics) Brandon J. Rickman
- Moore's Law sucks (was: 3D graphics) coder@ibm.net
- Moore's Law sucks (was: 3D graphics) Alex Oren
- Version Control (was: DBs and Events) Vadim Tkachenko
- Version Control (was: DBs and Events) coder@ibm.net
- Version Control (was: DBs and Events) Vadim Tkachenko
- Version Control (was: DBs and Events) coder@ibm.net
- Version Control (was: DBs and Events) coder@ibm.net
- Version Control (was: DBs and Events) Jon A. Lambert
- Version Control (was: DBs and Events) s001gmu@nova.wright.edu
- Version Control (was: DBs and Events) Raph & Kristen Koster
- Version Control (was: DBs and Events) coder@ibm.net
- Version Control (was: DBs and Events) Felix A. Croes
- Net protocols for MUDing (was: Moore's Law sucks) Jon Leonard
- Net protocols for MUDing (was: Moore's Law sucks) coder@ibm.net
- Net protocols for MUDing (was: Moore's Law sucks) s001gmu@nova.wright.edu
- Net protocols for MUDing (was: Moore's Law sucks) Vadim Tkachenko
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) Caliban Tiresias Darklock
- Net protocols for MUDing (was: Moore's Law sucks) J C Lawrence
- Net protocols for MUDing (was: Moore's Law sucks) J C Lawrence
- Net protocols for MUDing (was: Moore's Law sucks) Adam Wiggins
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) Vadim Tkachenko
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) Vadim Tkachenko
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) Adam Wiggins
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) J C Lawrence
- Net protocols for MUDing (was: Moore's Law sucks) Chris Gray
- Net protocols for MUDing (was: Moore's Law sucks) Adam Wiggins
- Net protocols for MUDing (was: Moore's Law sucks) Ben Greear
- Net protocols for MUDing (was: Moore's Law sucks) Adam Wiggins
- Net protocols for MUDing (was: Moore's Law sucks) s001gmu@nova.wright.edu
- Net protocols for MUDing (was: Moore's Law sucks) Jon A. Lambert
- Net protocols for MUDing (was: Moore's Law sucks) J C Lawrence
- VEIL (was: Clients) Brandon Gillespie
- LDMs (large dynamic maps) was Unique items Mike Sellers
- Describing the environment Stephen Zepp
- Describing the environment Richard Woolcock
- Back on the list Niklas Elmqvist
- Back on the list Chris Gray
- Back on the list coder@ibm.net
- Unique items The Eternal City
- Unique items coder@ibm.net
- Position sorting Adam Wiggins
- Position sorting coder@ibm.net
- Unique items coder@ibm.net
- Unique items Nathan F Yospe
- BOOK: Myer's Silverlock coder@ibm.net
- BOOK: Myer's Silverlock Chris Gray
- BOOK: Myer's Silverlock Adam Wiggins
- Dynamic Loading of Modules (was: Back on the list) Niklas Elmqvist
- Dynamic Loading of Modules (was: Back on the list) Vadim Tkachenko
- Dynamic Loading of Modules (was: Back on the list) J C Lawrence
- Dynamic Loading of Modules (was: Back on the list Jon A. Lambert
- Net protocols for MUDing s001gmu@nova.wright.edu
- Net protocols for MUDing Stephen Zepp
- Net protocols for MUDing Chris Gray
- Net protocols for MUDing Adam Wiggins
- Net protocols for MUDing J C Lawrence
- Net protocols for MUDing Shawn Halpenny
- Net protocols for MUDing J C Lawrence
- Net protocols for MUDing Chris Gray
- Dynamic Loading of Modules Niklas Elmqvist
- Senses (was: The MLI Project) s001gmu@nova.wright.edu
- bar-time (was The MLI Project) Mike Sellers
- 3D engines for MUDs (was: The MLI Project) Niklas Elmqvist
- 3D engines for MUDs (was: The MLI Project) J C Lawrence
- 3D engines for MUDs (was: The MLI Project) Michael Hohensee
- 3D engines for MUDs (was: The MLI Project) Miroslav Silovic
- 3D engines for MUDs (was: The MLI Project) Michael Hohensee
- Why not compile java into object code? Ben Greear
- Why not compile java into object code? Cynbe ru Taren
- Why not compile java into object code? Caliban Tiresias Darklock
- Why not compile java into object code? Nathan F Yospe
- Why not compile java into object code? Niklas Elmqvist
- Why not compile java into object code? Ben Greear
- Why not compile java into object code? Jon A. Lambert
- Why not compile java into object code? Travis Casey
- Why not compile java into object code? Chris Gray
- Tutorial: Comments on Hand-crafting a compiler Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part I: Introduction Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part II: Expression Parsing Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part I: Introductio Chris Gray
- Tutorial: Let's build a Compiler! - Part I: Introductio s001gmu@nova.wright.edu
- Tutorial: Let's build a Compiler! - Part I: Introductio coder@ibm.net
- MUD Development Digest Dr. Cat
- MUD Development Digest Koster, Raph
- MUD Development Digest Mike Sellers
- Tutorial: Let's build a Compiler! - Part III: More Expressions Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part IV: Interpreters Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part V: Control Constructs Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part VI: Boolean Expressions Jon A. Lambert
- Tutorial: Let's build a Compiler! - Comments Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part VII: Lexical Scanning Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part VIII: A Little Philosophy Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part IX: A Top View Jon A. Lambert
- Tutorial: Let's build a Compiler! - Part X: Introducing TINY Jon A. Lambert
- Compilers: Toy available for ftp Chris Gray