don't know
whether Bucardo or Londiste (two alternative systems that work on
roughly the same principle) have this functionality, but I kind of
doubt it since both were designed to get rid of several of the
complexities that Slony presented. (Slony had all those complexities
because it w
ure it does the thing requested in this case.
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corruption fixes since 9.0.4. You should always try to
stay on the latest minor release of your version of Postgres.
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ring and are
> consuming by far the most disk space (still somewhat expensive on SSD)!
This doesn't actually solve your problem, but you could mitigate the
cost by putting those tables on spinning-rust disks using tablespaces
or symlinks or whatever.
Best regards,
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systems to move all the data from one to the
other. Depending on your uptime requirements and the size of the
database, this approach can either be a life saver or a total waste of
time and will to live. More often the latter, please be aware.
A
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b from the
old machine and restore locally, you could do
pg_dump -U postgres -h 192.0.2.1 -C egdb | psql -U postgres
I recommend reading the pg_dump (and if you like, pg_dumpall) manuals
before proceeding.
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ty's time with crowdsourced editing of job
postings is in any way appropriate for the pgsql-general list.
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onvention.
This case is no different.
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emed developer claimed something and
maybe should have relinquished sooner given his workload. That
happens; nobody's perfect. It's frustrating, but this is not the only
community to have had that issue (cf. Linux kernel, for an
approximately infinite series of examples of this). I am not su
st, I
found that to be useful when talking to Oracle partisans.
A
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e all the
data in the table. I don't know what rewriting such a query would
mean.
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ut you asked what was behind the design
decision and I told you. But in general, the experience seems to be
that triggers are easier to get right (novice or no, _pace_ section
38.7).
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lly sure why you think the manual is misleading.
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hacks, but if you need a bugfix prior to a real solution
they'd give you a path.
A
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I. But do consider
trying out the command line. You'll be surprised at the power you get
once the initial learning curve is over.
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m MySQL already.
Consistency and rigour are the changes ;-)
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s to MySQL, MySQL always wins, what you teach them is
"Postgres performance sucks."
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this mysql2pgsql conversion rather than N dedicated small teams for
> every mysql client out there.
…I don't think anyone is telling you, "Don't build this." You should
do what you like with your time :)
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27;t deserve while
> they treat customers and employees with similar levels of arrogance.
Nothin' for nothin', but I don't think it helps Postgres to attack
others' business plans -- whatever one thinks of them -- as part of an
argument about why Postgres is the right tool fo
mpatibility historically was the basis for something
becoming a major version upgrade. (I can recall a couple bugs where
you had to tickle the catalogues, so it's not exactly true that
they're never incompatible, but it's incredibly rare.)
Best regards,
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m. But one has to
face the critique in its own terms.
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ason we're still using 9.2.
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to some other
place later, and it'd suck if the transaction failed half way through
because it turns out there's nowhere to put the data I've just staged.
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ssibly be exfiltrated,
you need to know the state of all of it.
For realistic cases, I expect that deleted data is usually more
important than updated data. But a threat modeller needs to
understand all these variables anyway.
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metimes people delete data from a system because
it's been archived somewhere else or something like that -- not all
databases have the totality of all the relevant data in them, but can
often represent just "current" data.
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al risk to be
mitigated is. It might, sure. The security profiler would still need
to make a list of this fact and then ask how countermeasures mitigate
it.
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uditor, this might be enough
to satisfy the condition.
Also, of course, there is the application_name (string) parameter. In
principle, you ought to be able to filter on this. Again, won't help
you if your application login is somehow compromised.
I agree that all of this depends on logging
e you can! There are also some firms that can help with
migration if you like.
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losing the
shell so that the session hangs around). Eventually, the Postgres
backend will try to talk to the session and discover it isn't there,
and you'll get a termination logged (assuming you have loging turned
up that high).
A
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urage those who think there is a problem to
be solved to make a scratch proposal and see whether it flies. It's
always easier to discuss a concrete proposal than to try to figure out
whether something is a good idea in the abstract. The shorter and
easier to understand the proposal is, I
children of slaves.
If someone did that, it would fall under (2), no? (I note that a
recent RFC, of which I am a co-author, about DNS terminology did say
that "primary" and "secondary" were to be preferred over "master" and
"slave". I didn't personally
an we can do something about it by writing down rules.
Still, the exercise of writing down rules may help to notice things
one wouldn't say to a friend. And I hope we're all friends here.
Best regards,
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tended in the generic sense. I apologise in case
that wasn't clear.
> It is the perceived intention of what one says that is important, not what
> one actually says!
I think that is perhaps a false dichotomy. But I also think I have
said enough on this topic, so I shall stop now.
B
that you actually want to fail over.
I've seen an awful lot of people want automatic failover who also
can't afford for the already-committed transactions on the master to
be lost. Unless you're running synchronous, be sure you have the
workload that can actually accept lost w
at stuff about what the IETF does some
while ago. There is definitely more than one way to do this.
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at can be done about it?
You may end up taking an outage in effect, because you need to compact
them at least once. If you can flip to a replica, that is the easiest
way to fix it.
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to recover after a restart.
It may not be the hardware. Depending on how vmware is configured, it
could just be a setting. Also, something in the OP's message made me
think that this was _actually_ a network-attached disk, which can also
have such problems. (But in general, I agree.)
A
fork. But …
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/postgresql/Driver
… since it can't find the driver, I'd bet that your classpath doesn't
contain /opt/postgresplus/edbmtk/lib.
Best regards,
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Best regards,
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receive a message that data is committed before any replication of the
data has commenced," would that help?
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card number gets lost in an
eventually-consistent system, and people suddenly understand
viscerally why transactions semantics are so hard.
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hors intended. Doesn't matter for
these purposes! :)
[2] Apparently, Marshall McLuhan didn't say this; instead, his tribune
John Culkin, SJ said it. It's still an excellent point, whoever made it.
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t I've been in the
sort of long, boring speculative conversation that could have been
shut down quickly with this kind of data.)
A
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re's something that we're going to have to accept, however,
and that's that there are way more application coders than there are
people who really get database systems. Fixing this problem requires
years of efforts.
Best regards,
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Sent vi
> so why does it ask me for a password?
You must have password authentication enabled. You'd have to change
it to "trust", I guess.
A
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I remember when computers were frustrating because they *did* exactly what
you told them to. Tha
ome time. And there are a lot of grotty corners to IPv6
for which there are no analogies in IPv4. Uh, scoped addresses,
anyone ;-)
A
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Information security isn't a technological problem. It's an economics
problem.
--Bruce Schn
s, so if there's some
Windows-specific tricks, you may need to know that.
A
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Everything that happens in the world happens at some place.
--Jane Jacobs
---(end of broadcast)---
TIP 3:
t it will work
> for now.
You could perhaps set up a .pgpass just for you at the beginning as
well; but in general, yes, if you have to rely on someone else
managing the permissions to the back end, then you also have to be
able to cope with the authentication mechanisms.
A
--
Andrew Sulliv
7;m not looking at the docs right now). Anyway, if it _is_
doing a cursor for you behind the scenes, that's almost certainly
what you want.
A
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"The year's penultimate month" is not in truth a good way of saying
November.
--
cts, and see if your component could be included.
(It seems to me there are already three or four monitoring tools
there. Search for "monitor".)
A
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This work was visionary and imaginative, and goes to show that visionary
and imaginative work need no
correctly. It must not be what you think it
is.
A
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In the future this spectacle of the middle classes shocking the avant-
garde will probably become the textbook definition of Postmodernism.
--Brad Holland
null). But in general, my impression is that
you don't want inheritance here. What you probably want is better
normalization of your data on the way in.
A
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The fact that technology doesn't work is no bar to success in the marketplace.
Bruce, at the current rate
of patch review, beta won't happen before Sept.
A
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When my information changes, I alter my conclusions. What do you do sir?
--attr. John Maynard Keynes
---(end of broadcast)-
On Wed, May 30, 2007 at 08:04:19AM -0700, Joshua D. Drake wrote:
> I would like to submit that, that is likely not true at all.
Possibly. I was just pointing out that the last estimate any
developer gave was "beta in Sept."
A
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The whol
On Wed, May 30, 2007 at 06:28:17PM -0400, ABHANG RANE wrote:
> client. Please may I know what other parameters need to be tweaked. I
To begin with, please show us exactly what you're doing. I don't
know what it is yet.
A
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This work was
s, is actually
probably good enough for most cases, assuming it is implemented
correctly (see recent discussion on this topic). So the availability
piece is mostly solved. What else do you want?
A
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When my information changes, I alter my conclusions. What
n fact build a Postgres
system that does the same things today, though.
These are all different solutions to different problems, so it's not
surprising that they look different. This was the reason I asked,
"What is the problem you are trying to solve?"
A
--
Andrew Sul
But that was undesirable for the reason I note
above.
A
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In the future this spectacle of the middle classes shocking the avant-
garde will probably become the textbook definition of Postmodernism.
--Brad Holland
-
On Fri, Jun 01, 2007 at 08:40:13PM +0200, Alexander Staubo wrote:
> On 6/1/07, Andrew Sullivan <[EMAIL PROTECTED]> wrote:
> >These are all different solutions to different problems, so it's not
> >surprising that they look different. This was the reason I asked,
>
don't want
to do it without thinking hard about what the compromises might be,
and figuring out which ones to make. "Breaks transactional model",
for instance, is right out :)
A
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I remember when computers were frustrating because they *did* exa
it already.)
> This then begs the question: are CREATE|ALTER TABLESPACE commands
> stored in the xlogs?
(I'll spare the rant about begging the question.) Since they're
transactional, they must be, no?
A
--
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When my information changes, I alte
work on the system. But just as a teaser: what do you do if
your DDL on the local node has succeeded, and you added additional
data in the same transaction, but the DDL fails for some reason on a
remote node? Note that this one isn't even one of the actually
tricky cases.
A
--
Andrew Sulli
difficult on the part of those who have worked on the
system. DDL changes require that every node have the new schema
before any of the node-affecting data gets there. We have _enough_
problems with DDL failing on target systems without increasing this
problem tenfold by doing it automat
lity attempts in order to
depend on some new back end features -- putting this entirely in user
space turns out to be awful. It's how we got the monstrous catalog
corruption hack.
This is getting pretty Slony specific, though, so if we're to
continue this thread, I suggest we do
ways_ 30 minutes behind, as a sort of poor-person's
fast-recovery PITR, then you lose that functionality if you have to
perform DDL on the replica at the same time as on the origin, because
you have to catch up first.
A
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"The year's penultimat
f cases doesn't lead to complete breakage in others. (I had to be
exposed to the multimaster MS SQL stuff, years ago, and I have to say
that it was great when it worked; but when things went south, boy did
your life suck. Whether it is better now, I don't know.)
A
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es too late, but you don't need VACUUM FULL for that.
VACUUM FULL _does not_ mean "vacuum everything"!
A
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Unfortunately reformatting the Internet is a little more painful
than reformatting your hard drive when it get
On Sun, Jun 03, 2007 at 01:35:49PM -0400, Lew wrote:
> How much data do you put in the DB? Oracle has a free version, but it has
> size limits.
AFAIK, Oracle's free version doesn't include RAC, which is what would
be needed to satisfy the request anyway.
A
--
Andrew Su
we have. If you
happen to want to use NULL to mean something specific in some
context, go ahead, but you shouldn't generalise that to "usually
means" anything.
A
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Everything that happens in the world happens at some place.
--Jane
uot;)
See, this is what happens when you study the wrong things in school.
You start to think that logic and metaphysics are somehow related to
one another. :-/
A
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The fact that technology doesn't work is no bar to success in the marketplace.
m full).
Several people have been bitten by the misunderstanding that "VACUUM
FULL" means "VACUUM ALL TABLES" (e.g. vaccum full database).
A
--
Andrew Sullivan | [EMAIL PROTECTED]
I remember when computers were frustrating because they *did* exactly what
you told them
7;d suspect vacuum issues.
Oh, one other thing. I noted you're storing the player's IP address.
You do know that maps very poorly to actual individuals on the other
end, right?
A
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Unfortunately reformatting the Internet is a little more painful
th
data stored online with
simple reversible encryption.
A
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The whole tendency of modern prose is away from concreteness.
--George Orwell
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TIP 9: In versions below 8.0, the
sign is really a good idea.)
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The plural of anecdote is not data.
--Roger Brinner
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TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail
ou have at least one long-running transaction that is
perhaps doing nothing, but that is preventing VACUUM from recovering
space. What does ps -auxww | grep postgres (or something equivalant)
show you?
A
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Users never remark, "Wow, this software may be buggy a
t 7.0 is pre-WAL. Are you
running with the -F switch turned on, for performance? It could well
be that you are running into data corruption that crashes the
database. (The lack of WAL is not the only reason you might be
running into that. 7.0 is a long time ago, and there are a lot of
bugs that
vacuuming correctly? If you had xid wraparound, your
data could disappear.
2. Malice or pilot error: are you sure nobody has issued
TRUNCATE on the table?
A
--
Andrew Sullivan | [EMAIL PROTECTED]
Users never remark, "Wow, this software may be buggy and hard
to use, but at least the
#x27;d not be able to see anything in the
table. When you went to insert to the table, though, you'd get
errors, so unless you're dropping the table and rebuilding from
scratch, I'd expect you to get an error when you reloaded the data.
A
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On Fri, Jun 08, 2007 at 11:29:12AM +0300, Andrus wrote:
> How to speed up the query
We don't know. You don't tell us what version you're running, show
us any EXPLAIN ANALYSE output, tell us about the data. . .
A
--
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Unfortunately reforma
is a way of saying,
"You didn't tell us anything that would allow us to help.")
A
--
Andrew Sullivan | [EMAIL PROTECTED]
In the future this spectacle of the middle classes shocking the avant-
garde will probably become the textbook definition of Postmodernis
emory than you actually have? After two years,
I'd expect the data to be larger, which might mean you have reached
some threshold where an optimisation you made that wasn't actually
right is now really wrong. If you're swapping, the CPU time is
probably going to bringing some data
27;re doing regular
VACUUM. That hasn't been a problem since 7.2.
A
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When my information changes, I alter my conclusions. What do you do sir?
--attr. John Maynard Keynes
---(end of broadcast)--
aybe have (e.g.)
work_mem set too high, and that's what is causing your problem? Or
shared buffers too big? This is a common error, and on a smaller set
of data, it won't hurt; but when the data gets to a point, you lose.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
A certain descriptio
27;re probably
trying to outsmart the planner/optimiser here, and that's _usually_
not a good idea. IT shouldn't make any difference whether you add
that +0 or not, assuming the database is tuned correctly.
I'd be rather more worried about the date_trunc stuff. You probably
want a
least limit it to one list?
A
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Everything that happens in the world happens at some place.
--Jane Jacobs
---(end of broadcast)---
TIP 1: if posting/reading through Usenet, please send an
, we'd be
violating it, and since we're not, we can't possibly know about it,
right ;-) But there are some materials about why to use Postgres on
the website:
http://www.postgresql.org/about/advantages
A
--
Andrew Sullivan | [EMAIL PROTECTED]
When my information changes, I alte
On Mon, Jun 18, 2007 at 02:38:32PM -0400, Andrew Sullivan wrote:
> I've picked -advocacy.
Actually, I _had_ picked advocacy, but had an itchy trigger finger.
Apologies, all.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
A certain description of men are for getting out of debt, yet are
aga
le (via polling or listen/notify) and sends the
> queued mail.
For the record, this is _way_ more robust. It also prevents your
database from accidentally DoSing your mail server, as it would if
thousands of mail messages were all triggered in a very short period
of time.
A
--
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find out more about bizgres at http://bizgres.org/home.php.
A
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The plural of anecdote is not data.
--Roger Brinner
---(end of broadcast)---
TIP 5: don't forget to increase your free space map settings
7;s probably an indicator that some of the data is
repeated, and that tells you you're not normalised correctly.)
A
--
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The plural of anecdote is not data.
--Roger Brinner
---(end of broadcast)-
ience tell me what is the best free solution to my
> problem?...
AFAIK there isn't one. PDA replication requires disconnected
multimaster asynchronous replication, and I don't know of a project
that has delivered that yet.
A
--
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This work was visi
putting it in
an RDBMS? Is it because all your pre-built tools already speak SQL?
If you're really after performance, I'm not convinced a SQL-speaking
RDBMS (delivered by MySQL or Postgres or anyone else) is what you
actually need.
A
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Andrew Sullivan | [EMAIL PROTECTED]
The who
access is for a (set of) script(s)
that achieve what you want (e.g. scripts with the appropriate
createdb, psql -c "something" &c. inside them). Obviously, if the
user can edit the scripts, then your intention is still foiled.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
The fact tha
dly, or is this more a control attempt? If the
latter, I fear you are going down the wrong road.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
The very definition of "news" is "something that hardly ever happens."
--Bruce Schneier
---(
ing is pretty useful. But
for other applications, it's probably a lousy choice.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
I remember when computers were frustrating because they *did* exactly what
you told them to. That actually seems sort of quaint now.
--J
system that currently supports what you're talking about. This is
easier to bodge together under Slony using views and such like, but
it's still not trivial. If you wish to discuss how to do this with
Slony, I suggest taking it up on that list (available from the site
mentioned above).
A
erthreading actually helps, although I
may have overlooked a couple of cases.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
I remember when computers were frustrating because they *did* exactly what
you told them to. That actually seems sort of quaint now.
--J
hared temp table" support in Postgres.
A
--
Andrew Sullivan | [EMAIL PROTECTED]
Everything that happens in the world happens at some place.
--Jane Jacobs
---(end of broadcast)---
TIP 9: In versions below 8.0, the planner will
ing to speculate :)
A
--
Andrew Sullivan | [EMAIL PROTECTED]
A certain description of men are for getting out of debt, yet are
against all taxes for raising money to pay it off.
--Alexander Hamilton
---(end of broadcast)---
TIP 6: ex
rom the database,
or. . .?
A
--
Andrew Sullivan | [EMAIL PROTECTED]
Users never remark, "Wow, this software may be buggy and hard
to use, but at least there is a lot of code underneath."
--Damien Katz
---(end of broadcast)---
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