samba-vms Digest, Vol 14, Issue 3

[Jan-Erik Söderholm XA (TN/PAC)]

> >Hi.
> >The original OP didn't say what VMS version.
> >AFAIK, the 127 block dir cache limit (and I don't
> >think raising ACP_DIRCACHE helped actualy) was
> >removed in some later VMS version. Maybe 7.x.
> 
> Are you sure about that? I deal with 7.1 to 7.3-1 systems on 
> a daily basis, and if we have to delete large numbers of
> files in a directory, it takes a very long time - unless
> you do it in reverse alphabetical order!
> ----------------------------------
>         Stephen Eickhoff
>        www.operagost.com
> ----------------------------------

Hi.
I said that the fixed limit on DIR size caching
was changed, not that it should be "fast" (whatever
*that* is...) to delete files :-)

Anyway, I think that a situation where you regulary
have *many* files in a single VMS directly is
bad application design. Now, I have regulary used
designs where ther have been 20-30.000 files in a single
dir, without any major problem. And, as you said, there
are tricks if you need to delete a large amount of files.

And lastly, this is what the VMS-FAQ says :

"Performance of larger directory files improves (greatly)
 with OpenVMS V7.2 and later-operations on directory files
 of 128 blocks and larger were rather slower on earlier
 OpenVMS releases due to the smaller size of the directory
 cache and due to the directory I/O processing logic."

Best Regards
Jan-Erik.



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