ISN limit in ADABAS file reached

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1

Hi all,
one of my ADABAS files is approaching the 16,7 mio. limit due to the three bytes length of each ISN. My idea is to increase the ISN up to 4 bytes. Does the following approach work:

  • Unload the file:
    – ADAORD REF FILE=nnn,ISNSIZE=3
  • Load again:
    – ADAORD STORE FILE=nnn,ISNSIZE=4,MAXISN=20000000,OVERWRITE

Are there any side-effects I have to consider, maybe during utility execution or later during access to that file. Any ideas are welcome since this is the first time I have to perform this :wink:

Thanks in advance for answers,
Ralf

2

Hi Ralf.

This is probably more simple than you think.

I have used this for ADABAS Z/os several times.

ADAORD REORFASSO FILE=xxx
ADAORD ISNSIZE=4

I have not seen messureable side effects.