As Bruce commented, the limit is based on the ability of the XM log to get
a before and after image of the changes. The files can be added in an
non-alpha order but the amount to log increases. If a file name is added
to the directory (appended) then only the last "record", directory eof and
the rest of the label table information within the transaction needs to be
logged.
If on the other hand a file name is inserted at the beginning of the
directory
the whole directory image needs to be logged.
The limit for Posix names within a directory varies because Poxis allows
for larger names, thus potentially a larger directory file.
Of course we should remember (if anyone is old enough) that the directory
node on the classic MPE system could fill up between 900 and 1200 entries.
Walt
Walter McCullough
MPE/iX High Availability R&D Architect
"Bruce Collins" <[log in to unmask]> wrote in message
news:P8qdnXTlXcJ9QX_dRVn-sQ@fidnet.com...
> If I recall, it isn't just the number of files that are built, but how
they
> are added to the directory structure that determines when the directory is
> "full". Generally you can add more files to the directory if they are
being
> added in alphabetical order.
>
> The limit is usually somewhere around 35,000 - 40,000 files according to
> small-d donna's post (Re: [HP3000-L] XM Logfile size and XM logging of
> Powerhouse subfiles) of June 28th, and who am I to question her.
>
> Bruce.
>
>
> ----- Original Message -----
> From: "Tony Summers" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, June 30, 2004 10:50 AM
> Subject: Re: [HP3000-L] MPE 7.5 Limitations on files per directory
>
>
> > Try adapting the following script to see when MPE gives up.
> >
> > %setvar swcurr 1
> > %WHILE SWCURR < 1000000
> > %CONTINUE
> > %BUILD S!SWCURR
> > %SETVAR SWCURR SWCURR + 1
> > %ENDWHILE
> >
> > -----Original Message-----
> > From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On
Behalf
> > Of Danie Brink
> > Sent: 30 June 2004 09:05
> > To: [log in to unmask]
> > Subject: [HP3000-L] MPE 7.5 Limitations on files per directory
> >
> > I need to find out if there is a limitation on the number of files per
> > directory, group and/or account that MPE 7.5 can handle. Any
suggestions
> on
> > a document/manual that will provide me with this information, would be
> > appreciated. Thanks.
> >
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