Does anyone have any experience using Sequentially hashed files? The
documentation on Sequentially hashed files is not very explicit about
what kinds of benefits or problems can be expected / experienced.. It
also only hints towards one use case, but IMO doesn't do enough to
clearly define when
Somehow, I have lost my list of Universe Hashed File Types and their
recommended associated ID structures and I cant seem to find it in the
Universe System Admin or System Description .pdf's
Can someone point me to where its hiding in the documentation?
--
Hi Jeff
Not to hand, but here's the help from HASH.HELP and CREATE.FILE:
CREATE.FILE:
The valid types are:
*TYPE* *USAGE*
1 Sub-UFD type file, for large records or source code.
2 Hashed. Keys end with numbers.
3 Hashed. Keys end mainly with numbers.
4
Jeff,
A quick way to get this info is to use the CREATE.FILE command and
enter ? at the file type prompt:
1 Sub-UFD type file, for large records or source code.
2 Hashed. Keys end with numbers.
3 Hashed. Keys end mainly with numbers.
4 Hashed. Keys end with
In message
5e5ef002669716488cf5f69288ba6b093bf...@msgl-lon01-es01.msgluk.local,
Raymond P. de Bourbon rdebour...@msgl.com writes
Does anyone have any experience using Sequentially hashed files? The
documentation on Sequentially hashed files is not very explicit about
what kinds of benefits or
Thanks for the response.. Here's my situation: The app is generating
records with sequential numeric keys and over time the records are
deleted with the file returning to a count of zero.. The record sizes
can vary considerably from record to record...
Currently we are using dynamic files and are
Hi,
Creating a type-19 file (or type-1) has advantages with large records IF you
are not doing many reads and writes to the file. If you are updating a type of
log record, look into using OPENSEQ, READSEQ, WRITESEQ, instead of READs and
WRITEs. With the SEQ functions, you are appending
Thanks Jeff Brian. That will work.
Jeff Fitzgerald wrote:
Jeff,
A quick way to get this info is to use the CREATE.FILE command and
enter ? at the file type prompt:
1 Sub-UFD type file, for large records or source code.
2 Hashed. Keys end with numbers.
3 Hashed.
Hi Ray
Are you using UniVerse or UniData. I use dynamic files and never have to
resize them in UniVerse.
Regards
David Jordan
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Have you tried setting MINIMUM.MODULUS to a high value on your dynamic
file. This prevents the file from merging below the size you've set.
Although it can still split to larger than that size.
You can use the CONFIGURE.FILE command to set MINIMUM.MODULUS - but it
won't take effect until the
Hello,
I'm looking for a solution to distribute a Unidata/Unix Hashed file like
Universe does with the DEFINE.DF verb and PartKey algorythm.
Is there someone with any idea ?
With kind regards.
Manu
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