HP3000-L Archives

January 1999, Week 4

HP3000-L@RAVEN.UTC.EDU

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From:
Evan Vaala <[log in to unmask]>
Reply To:
Evan Vaala <[log in to unmask]>
Date:
Tue, 26 Jan 1999 15:20:03 -0600
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Richard Fisher wrote:

> I've finally had the time to play with Java (still working  under the
> learing curve but getting better). I have an applet running that retrieves
> data and displays it nicely from a TurboImage database using  Java RMI.

Unfortunately I do not have a solution your problem.  We are still on
MPE 5.0(I know, Y2K is lurking), and I have not had time to put Java and
the appropriate patches on our 3000 so I can test it.  I am interested
in timings of record retrievals using RMI on the 3000.  I am concerned
about Object Serialization performance.  Do you mind sending me some
timings/specs on retrieving records from the 3000 via RMI.  I am
currently testing a beta of Adager's ADBC.  I test timings on a dataset
of approximately 10,000 records, 546 bytes wide( 5 char columns(total 64
bytes), 7 I1, 4 R2, and 44 R4 columns ).  It takes 10-12 seconds to pull
all 10,000 records to a client(266mhz Pentium, NT4.0, jdk1.2).  If I
pull only 2 columns( U18 and U2 ), it takes 3-5 seconds.  We have an
HP928 with 256 meg ram. Both Client and Server are on the same 10BaseT
network.  I do want to note this is these times are based off the time
the last record has been retrieved.  The first record is retrieved and
viewable almost instantaneously.

> Is there any sample code out on the web i could lookat to see where
> i'm going wrong?

I know that this does not solve your current problem, but I will send
you a snip of ADBC update code offline.  You may also be aware that
MiniSoft has a JDBC solution as well as HP.  I am looking forward to
trying them both out.

regards, and Thanks in Advance

Evan Vaala
Electro-Craft

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