[Info-vax] ZIP and UNZIP maximum file size

[AEF]

On Nov 29, 12:54 am, Lester Dreckow <lester.drec... at gmail.com> wrote:
> Hi,
>
> Just wondering, now that Zip 3.0 and Unzip 6.0 support file sizes
> larger than 2GB, do we know what the upper limit is?
>
> Best info I can find seems to be (http://www.info-zip.org/
> FAQ.html#limits) …
>
>         uncompressed size of a single file: 4 GB; This is also not a
> hard limit …
>         compressed size of a single file: 4 GB
>
> But trying it (before finding the above), it has successfully zipped
> and unzipped a 40GB backup saveset via an 11GB zip file.  "Unzip -t"
> was OK and DIFF confirmed the resultant unzipped saveset had no
> differences.
>
> It zipped in 64 minutes and unzipped in 34 minutes, running on …
> $ tcpip show version
>
>   HP TCP/IP Services for OpenVMS Industry Standard 64 Version V5.6 -
> ECO 5
>   on an HP rx2660  (1.67GHz/9.0MB) running OpenVMS V8.3-1H1
>
> $
>
> The outputs …
> $ dir/dat/siz/wid=siz=12 .bck,.zip
>
> Directory DISK3:[BACKUP.Z]
>
> Z.BCK;1                  85106448  28-NOV-2011 23:23:53.89
> Z.ZIP;1                  24983686  29-NOV-2011 00:38:37.23
>
> Total of 2 files, 110090134 blocks.
> $
>
> Regards,
> Lester Dreckow

Just curious, what was your RMS extend size?

AEF