Great Circle Associates Majordomo-Workers
(July 1996)
 

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Subject: Re: majordomo speed
From: Jason L Tibbitts III <tibbs @ hpc . uh . edu>
Date: 04 Jul 1996 21:24:43 -0500
To: Sean Kamath <kamath @ pogo . WV . TEK . COM>
Cc: majordomo-workers @ greatcircle . COM, john heasley <heas @ teleport . COM>
In-reply-to: Sean Kamath's message of Thu, 04 Jul 1996 12:35:57 PDT
References: <9607041935.AA14726@catenary.WV.TEK.COM>

>>>>> "SK" == Sean Kamath <kamath@pogo.WV.TEK.COM> writes:

SK> This is the biggest complaint I have about DBM files.  They are
SK> basically worthless for large datasets.

I can't see this.  Some DBM libraries have different limits, but I don't
think gdbm or Berkeley DB have the 1024 byte key limit.

For all concerned, here's a table from the AnyDBM_File manpage:


                        odbm    ndbm    sdbm    gdbm    bsd-db
                        ----    ----    ----    ----    ------
Linkage comes w/ perl   yes     yes     yes     yes     yes
Src comes w/ perl       no      no      yes     no      no
Comes w/ many unix os   yes     yes[0]  no      no      no
Builds ok on !unix      ?       ?       yes     yes     ?
Code Size               ?       ?       small   big     big
Database Size           ?       ?       small   big?    ok[1]
Speed                   ?       ?       slow    ok      fast
FTPable                 no      no      yes     yes     yes
Easy to build          N/A     N/A      yes     yes     ok[2]
Size limits             1k      4k      1k[3]   none    none
Byte-order independent  no      no      no      no      yes
Licensing restrictions  ?       ?       no      yes     no

[0] on mixed universe machines, may be in the bsd compat
    library, which is often shunned.

[1] Can be trimmed if you compile for one access method.
-- 
      Jason L. Tibbitts III - tibbs@uh.edu - 713/743-8684 - 221SR1
System Manager:  University of Houston High Performance Computing Center
                1994 PC800 "Kuroneko"      DoD# 1723


References:
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From: m.hampson@ic.ac.uk

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