May 1997
- Multi-threaded mudding (was a flamefest) Jon A. Lambert
- Multi-threaded mudding (was a flamefest) Jeff Kesselman
- Multi-threaded mudding (was a flamefest) clawrenc@cup.hp.com
- Multi-threaded mudding (was a flamefest) Jeff Kesselman
- Multi-threaded mudding (was a flamefest) coder@ibm.net
- Multi-threaded mudding (was a flamefest) Jeff Kesselman
- Multi-threaded mudding (was a flamefest) coder@ibm.net
- Multi-threaded mudding (was a flamefest) Miroslav Silovic
- Multi-threaded mudding (was a flamefest) Jeff Kesselman
- Multi-threaded mudding (was a flamefest) Jon A. Lambert
- Multi-threaded mudding (was a flamefest) clawrenc@cup.hp.com
- Multi-threaded mudding (was a flamefest) Jeff Kesselman
- Multi-threaded mudding (was a flamefest) Jon A. Lambert
- Multi-threaded mudding (was a flamefest) Miroslav Silovic
- Multi-threaded mudding (was a flamefest) Jon A. Lambert
- Multi-threaded mudding (was a flamefest) Chris Gray
- Of disk swapping, database structure & project management.. Greg Munt
- Of disk swapping, database structure & project management.. Jeff Kesselman
- Of disk swapping, database structure & project management.. Jon A. Lambert
- Of disk swapping, database structure & project management.. clawrenc@cup.hp.com
- Of disk swapping, database structure & project management.. Chris Gray
- Of disk swapping, database structure & project management.. coder@ibm.net
- Of disk swapping, database structure & project management.. Jeff Kesselman
- Of disk swapping, database structure & project management.. clawrenc@cup.hp.com
- More sendmail tests... coder@ibm.net
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- Multi-threaded mudding (was a flamefest) Jeff Kesselman
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- Comments on the DB layer clawrenc@cup.hp.com
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- Comments on the DB layer clawrenc@cup.hp.com
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- Prepositions and parsing S001GMU@nova.wright.edu
- Prepositions and parsing clawrenc@cup.hp.com
- Prepositions and parsing Chris Gray
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- Prepositions and parsing Marian Griffith
- Prepositions and parsing clawrenc@cup.hp.com
- Prepositions and parsing Marian Griffith
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- Prepositions and parsing Nathan Yospe
- Prepositions and parsing clawrenc@cup.hp.com
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- Prepositions and parsing Miroslav Silovic
- Prepositions and parsing Chris Gray
- Prepositions and parsing Miroslav Silovic
- Comments on the DB layer clawrenc@cup.hp.com
- Comments on the DB layer Jon A. Lambert
- Comments on the DB layer Jon A. Lambert
- Comments on the DB layer clawrenc@cup.hp.com
In <199705130341.WAA08728@dfw-ix4.ix.netcom.com>, on 05/12/97
at 08:52 PM, "Jon A. Lambert" <jlsysinc@ix.netcom.com> said:
>> From: clawrenc@cup.hp.com
>> at 10:41 PM, "Jon A. Lambert" <jlsysinc@ix.netcom.com> said: >>
...deletia...
>For "public" attributes/object attributes:
> SELECT column type length FROM SYSCOLUMNS WHERE TABLE = class; For
>user type attributes:
> SELECT column foreigntable FROM SYSKEYS WHERE TABLE = class; For
>"private" attributes/class attributes and methods
> SELECT column type length FROM ClassTable WHERE CLASS = class; For
>method code:
> SELECT binary_blob FROM MethodTable WHERE CLASS = class AND
> METHOD = method;
>For Inheritance:
> SELECT child FROM ChildTable WHERE CLASS = class;
I'd love to get into this in greater detail -- I just don't have the
time right now. I've flagged this mssage as one to return to.
>> >3) I can see how you would get numbers of killed mobiles by checking
>> > how many old objects of the type were dead. I don't see how you
>> > XREF with the weapons or spells, unless you store this info with
>> > the dead mobile object or the weapon or spell object undergoes a
>> > state change requiring it to be stored with the same transaction
>> > time.
>> >
><snip>
>>
>> -- Iterate across the list and record the transactions which deleted
>> them.
>>
>> -- Iterate across those transactions and list all the player objects
>> referenced by the transaction.
>These two statements lead me to suspect you are storing transactions
>as objects. No?
Not quite. I am in several minds here (a state which is becoming a
habit lately). In my original model I had trasactions stored ala:
StartTransactionMarker
TransactionID
OldObjectVersionID->NewObjectVersionID
OldObjectVersionID->NewObjectVersionID
OldObjectVersionID->NewObjectVersionID
OldObjectVersionID->NewObjectVersionID
EndTransactionMarker
(This being one entry in a cache flush block)
This of course means that every change to the DB gets represented by a
write to the DB. Expensive, especially as I'm already only
periodically flushing the cache to disk.
It then becomes fairly obvious to change the cache mechanics to have
the cache internally compress the object changes between cache
flushes. eg:
ObjectA is loaded into the cache.
ObjectA is changes into ObjectA'.
Changes again into ObjectA'2.
Changes again into ObjectA'3.
Changes again into ObjectA'4.
Changes again into ObjectA'5.
Changes again into ObjectA'6.
Changes again into ObjectA'7.
Cache is flushed.
The entry in the log, and the physical IO to the DB would be:
ObjectA->ObjectA'7.
With all the other components lost. It should make for a huge
comparitive performance boost, but a lot of state data is lost.
The next idea was to intelligently store deltas as mentioned above so
I don't lose all this state data. Again:
ObjectA is loaded into the cache.
ObjectA is changes into ObjectA'.
Changes again into ObjectA'2.
Changes again into ObjectA'3.
Changes again into ObjectA'4.
Changes again into ObjectA'5.
Changes again into ObjectA'6.
Changes again into ObjectA'7.
Cache is flushed.
The physical IO now looks like:
Compute what changed for ObjectA->ObjectA'
Create a delta object containing the original values.
Write it to the DB and "connect" it to ObjectA as the prior version.
Compute what changed for ObjectA'->ObjectA'1
Create a delta object containing the original values.
Write it to the DB and "connect" it to ObjectA as the prior version.
Repeat up to ObjectA'7.
Update the "current" ObjectA entry with the current values.
This saves a lot of IO bandwidth, but still loses out on the number of
IOs, which is still very high. The next idea is to do exactly the
same thing, except that instead of writing each individual delta
object to the DB, to make one master delta object for the entire cache
flush. This master delta object would contain things like:
ObjectA:
AttributeXTranasactions [tranID, tranID, tranID, ...]
AttributeXValues [value, value, value, ...]
with the two arrays mapping to indicate the attributes value as of any
transaction that affected it (or more likely some more compressed/less
redundant version)
Don't know how much I'd save there.
>The type of logging I am doing knows nothing about the transaction
>itself. It can be used for transaction rollback also.
>
>Here's an example of what I'm thinking (its likely to pose problems
>*hehe):
>
> Bubba> drink water from canteen.
>
>Lets assume that an event is issued and during the course of its
>execution it will modify 2 objects, Bubba and the canteen. Bubba
>will have his thirst attribute modified and the canteen will have its
>weight attribute modified. Assume the event handles the canteen first
>then Bubba.
>
>If this is successful it might be logged as follows:
>
> tranid
> 00001 , start tran
> 00001 , old canteen , new canteen
> 00001 , old bubba , new bubba
> 99999, canteen disk commit
> 00001 , end tran
> 99999, bubba disk commit
>
>The 99999 tranids come from the cache manager and may be asynchronous
>like I have shown.
>
>Now for rollback lets assume player Jon blows Bubba away before he
>can quench his thirst.
>
> tranid
> 00001 , start tran
> 00001 , old canteen , new canteen
> 00002 , old bubba , new bubba <--- bubba dies here
> <--- bubba's drink event fails here, cause bubba has changed state
> 00001 , old bubba , new bubba ---> never logged
> 99999, canteen disk commit
> 00001 , end tran ---> never logged
> 99999, bubba disk commit
>Rollback would read the log backwards looking for tranid 00001,
>restoring canteen back to its original state and mark all the
>restored objects dirty again.
Why are you letting your failed events and partial object state (ie
intermediate state of an object during an event's execution) to be
known by the DB and thus potentially the rest of the world? This
would seem to allow logical consistancy problems:
EventA starts
Event A modifies ObjectA.
EventB starts.
Event B checks modified state of ObjectA and on that
basis modifies ObjectB.
EventB commits.
EventA fails and rolls back the change to ObjectA.
Oops. You're maintaining internal clean/dirty flags for changes that
aren't commited yet right? I guess that would cover it.
Aside: Ahh. This doesn't even begin to happen for me as events that
fail to C&C as in Bubba's drink event don't exist as transactions and
have no data to rollback (its all local and deleted when the event
fails), The DB only ever knows about successful events. Nobody cares
bout the rest.
>Server bootup/recovery would read the log differently, probably
>forward from the last 'syncpoint' making sure that all objects
>between 'start trans' and 'end trans' had 'disk commits'.
>Does this seem workable? This log could be certainly remain in
>memory and be flushed out to disk at syncpoints.
...thinking...
>> I can move backwards along the player object-version line, I can
>> examine their inventory. Heck, if I also store transaction owner's
>> with the transactions (probably a good idea), I could actually
>> recreate and watch the whole fight, blow by blow as it happened, along
>> with watching Bubba call in his Wiz friend to...). Just roll the DB
>> back to that time, and replay. It makes snooping a thing of the past.
>The transactions I log above are probably too generic to show what
>originated them and why. They are just sequences of otherwise
>arbitrary state changes.
As even user commands are events making a call to the parser object
with the entered string as an argument, I should, theoretically, be
able to animate an entire MUD replaying everything exactly as it
happened back when, including all IO etc (well, the fact of the IO and
the content of the IO if not making an actual IO down the network).
>> Odds to dollars your OS is not quite this stupid (I guess we're
>> talking Win NT here, so it actually may be pretty likely).
>Hey, do I detect an OS bias here? At least I'm not using a cheap
>imitation *gurgle* ;-)
Who me? Nahh. I am the very model of a modern major MS-bigot.
<tadah!> I *like* OO environments.
>> Re-opening the file every IO and then closing it to keep everybody in
>> sync is pathetically expensive. The standard solution is to run file
>> IO's thru a dup()'ed or dup2()'ed handle.
>>
>Yep, the trusty mainframe will let you thrash the hell out of it with
> re-opens too.
><code snippit snipped>
>This might work if close() doesn't attempt to free handles/buffers.
>I will have to test it. Thanks for the idea.
It works as a general form under DOS, Unix (cf Tanenbaum), and OS/2.
Of course MS may have broken forgotten to break this too -- you can
always hope.
--
J C Lawrence Internet: claw@null.net
(Contractor) Internet: coder@ibm.net
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- Alright... IF your gonan do DESIESE... Jon A. Lambert
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Chris Gray
- Alright... IF your gonan do DESIESE... coder@ibm.net
- Alright... IF your gonan do DESIESE... Chris Gray
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Marian Griffith
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Caliban Tiresias Darklock
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Caliban Tiresias Darklock
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Shawn Halpenny
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Shawn Halpenny
- Alright... IF your gonan do DESIESE... Raz
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Shawn Halpenny
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Shawn Halpenny
- Alright... IF your gonan do DESIESE... Nathan Yospe
- Alright... IF your gonan do DESIESE... Miroslav Silovic
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Miroslav Silovic
- Alright... IF your gonan do DESIESE... Caliban Tiresias Darklock
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Nathan Yospe
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Miroslav Silovic
- Alright... IF your gonan do DESIESE... Ben Greear
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Raz
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Caliban Tiresias Darklock
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Marian Griffith
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Jon A. Lambert
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... Nathan Yospe
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Jeff Kesselman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... Alex Oren
- Alright... IF your gonan do DESIESE... Adam Wiggins
- Alright... IF your gonan do DESIESE... Shawn Halpenny
- Alright... IF your gonan do DESIESE... Nathan Yospe
- Alright... IF your gonan do DESIESE... Huibai
- Alright... IF your gonan do DESIESE... Alex Oren
- Alright... IF your gonan do DESIESE... Brandon J. Rickman
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Alex Oren
- Alright... IF your gonan do DESIESE... Matt Chatterley
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Marian Griffith
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... clawrenc@cup.hp.com
- Alright... IF your gonan do DESIESE... Alex Oren
- Prepositions and Parsing... S001GMU@nova.wright.edu
- Prepositions and Parsing... Chris Gray
- Prepositions and Parsing... S001GMU@nova.wright.edu
- Prepositions and Parsing... Chris Gray
- Prepositions and Parsing... S001GMU@nova.wright.edu
- Prepositions and Parsing... Chris Gray
- unsubscribe mud-dev Dustan M. Hough
- Multiple characters and nested prompts clawrenc@cup.hp.com
- Nutirtion and a Resource Question Jeff Kesselman
- Nutirtion and a Resource Question coder@ibm.net
- Nutirtion and a Resource Question Nathan Yospe
- Nutirtion and a Resource Question coder@ibm.net
- Nutirtion and a Resource Question Nathan Yospe
- Languages Ling
- Q's Ling
- Q's coder@ibm.net
- Dupes. coder@ibm.net
- Languages coder@ibm.net
- Rooms, 3D arrays, etc. Michael Hohensee
- Rooms, 3D arrays, etc. Nathan Yospe
- Rooms, 3D arrays, etc. coder@ibm.net
- Rooms, 3D arrays, etc. RHS Linux User
- Rooms, 3D arrays, etc. Jeff Kesselman
- Rooms, 3D arrays, etc. Shawn Halpenny
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. Michael Hohensee
- Rooms, 3D arrays, etc. Adam Wiggins
- Rooms, 3D arrays, etc. Raz
- Rooms, 3D arrays, etc. Nathan Yospe
- Rooms, 3D arrays, etc. Raz
- Rooms, 3D arrays, etc. Nathan Yospe
- Rooms, 3D arrays, etc. Ling
- Rooms, 3D arrays, etc. Miroslav Silovic
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. Miroslav Silovic
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. Miroslav Silovic
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. Miroslav Silovic
- Rooms, 3D arrays, etc. Jon A. Lambert
- Rooms, 3D arrays, etc. Jeff Kesselman
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. Jeff Kesselman
- Rooms, 3D arrays, etc. Jon A. Lambert
- Rooms, 3D arrays, etc. Chris Gray
- Rooms, 3D arrays, etc. clawrenc@cup.hp.com
- Rooms, 3D arrays, etc. Caliban Tiresias Darklock
- Rooms, 3D arrays, etc. Marian Griffith
- Languages Jeff Kesselman
- Internal Mud Languages Jon A. Lambert
- Internal Mud Languages Jeff Kesselman
- Internal Mud Languages Jon A. Lambert
- Internal Mud Languages Jeff Kesselman
- Internal Mud Languages Chris Gray
- Starting characters (was: Alright...) Jamie Norrish
- Starting characters (was: Alright...) Jamie Norrish
- Starting characters (was: Alright...) Jeff Kesselman
- Starting characters (was: Alright...) Jon A. Lambert
- Spoken Languages & Food [was RP thesis...] Matt Chatterley
- Spoken Languages & Food [was RP thesis...] Adam Wiggins
- Spoken Languages & Food [was RP thesis...] Matt Chatterley
- Spoken Languages & Food [was RP thesis...] Adam Wiggins
- Spoken Languages & Food [was RP thesis...] clawrenc@cup.hp.com
- Spoken Languages & Food [was RP thesis...] Travis S Casey
- Spoken Languages & Food [was RP thesis...] Jeff Kesselman
- Spoken Languages & Food [was RP thesis...] Nathan Yospe
- Spoken Languages & Food [was RP thesis...] clawrenc@cup.hp.com
- Spoken Languages & Food [was RP thesis...] Jon A. Lambert
- Spoken Languages & Food [was RP thesis...] Nathan Yospe
- Spoken Languages & Food [was RP thesis...] Matt Chatterley
- Spoken Languages & Food [was RP thesis...] clawrenc@cup.hp.com
- Spoken Languages & Food [was RP thesis...] Marian Griffith
- Spoken Languages & Food [was RP thesis...] Travis S Casey
- Spoken Languages & Food [was RP thesis...] Matt Chatterley
- Spoken Languages & Food [was RP thesis...] Adam Wiggins
- Spoken Languages & Food [was RP thesis...] Jeff Kesselman
- Pidgin Language & Writing [was RP Thesis] Matt Chatterley
- Resets, repops and quests Alex Oren
- Resets, repops and quests Jeff Kesselman
- Resets, repops and quests Caliban Tiresias Darklock
- Resets, repops and quests Ling
- Resets, repops and quests Chris Gray
- Resets, repops and quests Matt Chatterley
- Resets, repops and quests Todd Lair
- Resets, repops and quests Chris Gray
- Resets, repops and quests Jeff Kesselman
- Resets, repops and quests Raz
- Resets, repops and quests Alex Oren
- Resets, repops and quests Chris Gray
- Resets, repops and quests Raz
- Resets, repops and quests Chris Gray
- Resets, repops and quests Nathan Yospe
- Resets, repops and quests Alex Oren
- Resets, repops and quests Chris Gray
- Resets, repops and quests clawrenc@cup.hp.com
- Resets, repops and quests Shawn Halpenny
- Resets, repops and quests clawrenc@cup.hp.com
- Resets, repops and quests Adam Wiggins
- Resets, repops and quests Chris Gray
- Resets, repops and quests Alex Oren
- Resets, repops and quests clawrenc@cup.hp.com
- Resets, repops and quests Huibai
- Resets, repops and quests clawrenc@cup.hp.com
- Resets, repops and quests clawrenc@cup.hp.com
- Nutirtion and a Resource Question Jeff Kesselman
- Nutirtion and a Resource Question clawrenc@cup.hp.com
- Conventions (was RP thesis) S001GMU@nova.wright.edu
- Conventions (was RP thesis) Jeff Kesselman
- Conventions (was RP thesis) Adam Wiggins
- Levels and Goals [was Alright..IF your gonan do DESIESE] Matt Chatterley
- Levels and Goals [was Alright..IF your gonan do DESIESE] Jeff Kesselman
- Numbers [was RP thesis...] Matt Chatterley
- RP thesis... (Chinese stuff) Ling
- Meta issues [was Alright... IF your gonan do DESIESE...] Matt Chatterley
- Meta issues [was Alright... IF your gonan do DESIESE...] clawrenc@cup.hp.com
- Meta issues [was Alright... IF your gonan do DESIESE...] Matt Chatterley
- Important: Posting requirements coder@ibm.net
- Levels and Goals [was Alright..IF your gonan do Adam Wiggins
- Levels and Goals [was Alright..IF your gonan do Jeff Kesselman
- Levels and Goals [was Alright..IF your gonan do clawrenc@cup.hp.com
- Levels and Goals [was Alright..IF your gonan do Jeff Kesselman
- Levels and Goals [was Alright..IF your gonan do clawrenc@cup.hp.com
- Levels and Goals [was Alright..IF your gonan do Jeff Kesselman
- Levels and Goals [was Alright..IF your gonan do clawrenc@cup.hp.com
- Levels and Goals [was Alright..IF your gonan do Jeff Kesselman
- Goal orienetd NPCs Jeff Kesselman
- Goal orienetd NPCs Nathan Yospe
- lots of stuff, sigh. Chris Gray
- Levels and Goals [was Alright..IF your gonan do Jon A. Lambert
- Probability (was: Alright... IF your gonan do DESIESE...) Shawn Halpenny
- Quests [was Resets, repops and quests] Matt Chatterley
- Quests [was Resets, repops and quests] Shawn Halpenny
- Quests [was Resets, repops and quests] Jeff Kesselman
- Quests [was Resets, repops and quests] Ling
- Quests [was Resets, repops and quests] Matt Chatterley
- Aims [was Alright... IF your gonan do DESIESE...] Matt Chatterley
- Habitat Data clawrenc@cup.hp.com
- Habitat Data clawrenc@cup.hp.com
- Habitat Anecdotes clawrenc@cup.hp.com
- Habitat Anecdotes Chris Gray
- Social Dimensions of Habitat's Citizenry clawrenc@cup.hp.com
- Social Dimensions of Habitat's Citizenry Jeff Kesselman
- The Lessons of Lucasfilm's Habitat clawrenc@cup.hp.com
- The Lessons of Lucasfilm's Habitat Jon A. Lambert
- The Lessons of Lucasfilm's Habitat clawrenc@cup.hp.com
- The Lessons of Lucasfilm's Habitat Jeff Kesselman
- The Lessons of Lucasfilm's Habitat clawrenc@cup.hp.com
- The Lessons of Lucasfilm's Habitat Jeff Kesselman
- The Lessons of Lucasfilm's Habitat clawrenc@cup.hp.com
- The Lessons of Lucasfilm's Habitat Jeff Kesselman
- The Lessons of Lucasfilm's Habitat Ling
- The Lessons of Lucasfilm's Habitat Chris Gray
- The Lessons of Lucasfilm's Habitat clawrenc@cup.hp.com
- The Lessons of Lucasfilm's Habitat coder@ibm.net
- Oracle Layza's Tales from Fujitsu Habitat clawrenc@cup.hp.com
- Powergamers [Was..Alright If] ashen
- Taming free PK ashen
- Taming free PK Marian Griffith
- Taming free PK Adam Wiggins
- Taming free PK Jeff Kesselman
- Taming free PK clawrenc@cup.hp.com
- MUDs - An environment, not a game Adam Wiggins
- MUDs - An environment, not a game Raz
- MUDs - An environment, not a game Adam Wiggins
- DESIGN: The Rules of Magic (fwd) Nathan Yospe