Re: Calculate hash for a *very* large file

[Dan <dan27649@xxxxxxxxx>]

Yep, that sounds like it.  I forgot the .LIB after QSYS, I thought it would
be .SYS or something other than .LIB.

Thanks Rob!

- Dan

On Thu, Jun 18, 2009 at 3:08 PM, <rob@xxxxxxxxx> wrote:

> You mean like this stream file
> '/QSYS.LIB/MYLIB.LIB/MYTABLE.FILE/PARTITION.MBR'?
>
> Rob Berendt
> --
> Group Dekko Services, LLC
> Dept 01.073
> Dock 108
> 6928N 400E
> Kendallville, IN 46755
> http://www.dekko.com
>
>
>
>
>
> From:
> Dan <dan27649@xxxxxxxxx>
> To:
> RPG400-L@xxxxxxxxxxxx
> Date:
> 06/18/2009 02:42 PM
> Subject:
> Calculate hash for a *very* large file
> Sent by:
> rpg400-l-bounces@xxxxxxxxxxxx
>
>
>
> Problem:  We FTP files from the i to a Windows server.  On a few
> occasions,
> we have had corruption even though FTP reports the transfer completed
> successfully.  The largest of these files have a record length of 2000
> bytes, and have record counts approaching 3 million on some days.
>
> Determining that corruption occurred often happens weeks later, after the
> original source data is removed from the i.
>
> The current thinking around here is to use a hash code.  We already found
> a
> few tools that can create a hash on the file that sits on the Windows
> server.  However, when I searched in the midrange.com archives, I found
> several references to the QC3CALHA API.  Unfortunately, it appears to be
> limited to a data length that can be defined in Binary(4).  I presume that
> the data length would be the product of the record length and number of
> records in the file.
>
> I found another link in the archive that provided source code for an
> application and that appears to use a stream file as input:
>   http://archive.midrange.com/rpg400-l/200303/msg00008.html
> It's been too many years, but can a native library/file object name be
> specified as a stream file?
>
> Any advice would be greatly appreciated!
> - Dan
> --
> This is the RPG programming on the IBM i / System i (RPG400-L) mailing
> list
> To post a message email: RPG400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: RPG400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.
>
>
>
> --
> This is the RPG programming on the IBM i / System i (RPG400-L) mailing list
> To post a message email: RPG400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: RPG400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.