Patrick,

What you say is true, however, consider this.  ADSM is only going to
backup changed files.  Netware will not recompress files until a
specified amount of time passes (we have this set to 2 days).
Therefore, the files being backed up will benefit from compression and
the compressed files don't need backing up.

In other words, if the file compression delay is longer than your ADSM
backup frequency, ADSM compression should be a benefit.  It depends on
the data, though, as you pointed out.  If you have a lot of ZIPs or
JPGs, they are not going to benefit from ADSM compression.  I guess it
goes back to "Know thy data."

My point is that sometimes it is not obvious that on a Netware server
the lion's share of the data to be backed up has NOT been compressed by
Netware.

Don't forget to set the "nwignorecomp yes" parm in the opt file.

Ron Clendenny  <rdclendenny AT cal.ue DOT com>
Callaway Nuclear Power Plant
Fulton, Missouri


> -----Original Message-----
> From: Patrick Gilman [SMTP:gilmanpa AT HLTHSRC DOT COM]
> Sent: Tuesday, May 06, 1997 8:46 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: NetWare 4.11
>
> Ron,
> I have found that Netware does a better job at compressing most files
> and ADSM will come up with lots of "Compressed File Grew" errors
> during a backup.  This means ADSM's compression actually caused the
> file to be larger than what NetWare was able to accomplish.  This can
> also be seen with non-compressed volumes that have zipped files on
> them.  I will cause the backups to take (just estimating here) about
> twice as long to complete a backup if there are lots of "Compressed
> File Grew" errors.
>
> Patrick Gilman (Vanstar Corporation)
> Healthsource, Inc.
> Hooksett, NH
>
> >>> "Clendenny, Ronald D." <rdclendenny AT CAL.UE DOT COM> 05/06/97 08:39AM
> >>>
> Patrick,
> Why should ADSM compression be disabled if volume compression is?
>
> Ron Clendenny  <rdclendenny AT cal.ue DOT com>
> Callaway Nuclear Power Plant
> Fulton, Missouri
>
> > -----Original Message-----
> > From: Patrick Gilman [SMTP:gilmanpa AT HLTHSRC DOT COM]
> > Sent: Monday, May 05, 1997 1:18 PM
> > To:   ADSM-L AT VM.MARIST DOT EDU
> > Subject:      Re: NetWare 4.11
> >
> > Bill,
> >
> > The Netware client instructions for ptf7 say to use the TSA410 that
> > comes with Netware 4.11.  You may want to look on Novell's Web site
> to
> > see what the latest patch may be, it should be called SMSUPx.EXE (x
> is
> > the latest version #).  TSA issues aside, I have had great success
> > with backing up my 4.10 servers.  The biggest thing to do is NOT
> > enable ADSM compression if the volumes are compressed.
> >
> > Patrick Gilman (Vanstar Corporation)
> > Healthsource, Inc.
> > Hooksett, NH
> >
> > >>> Bill King <bill AT NSMC.PARTNERS DOT ORG> 05/05/97 02:56PM >>>
> > I have ADSTAR V1.2 FOR OS/2.
> >
> > Is there anything I should be aware of when trying to backup netware
> > 4.11?
> >
> >
> > Do I use the netware 4.1 tsa (TSA410.NLM) on the netware server?
> >
> > Thank You
> > bill king