The client is 7.1 but our servers are still at 6.3.  Also I had to switch
to a storage server that does not have dedup on it as that slows the WAN
transfer way down (I only get about 20% network utilization when data is
being deduped, regardless of the RESOURCEUTILIZATION setting).  I am also
noticing "Retry 1" and "Retry 2" so maybe the data is being sent three
times over the wire for these files?  With many compression schemes a file
that is already compressed only grows a very small amount when you compress
it so I don't see the purpose of resending it twice over the wire.  I will
try the compressalways yes setting but hopefully that won't override the
exclusions I have set up for common compressed files.

On Thu, Jun 30, 2016 at 9:17 AM, Paul Zarnowski <psz1 AT cornell DOT edu> wrote:

> You can specify 'compressalways yes', which will prevent the retry.
> However, you then have to live with the fact that the file is expanded in
> TSM storage.
>
> I believe this problem does not apply to LZ4 compression, introduced with
> the latest clients when backing up to a container pool and using dedup.
>
> At 08:57 AM 6/30/2016, you wrote:
> >I have been watching an initial TSM backup running for a long time now
> over
> >a WAN connection (100mbit/sec) and I keep seeing "compressed data grew"
> >followed  by a "Retry".  Does this mean that for every file that
> >compression increased the size (even 1%) the whole transfer is discarded
> >and it starts over again with the same file (presumably with compression
> >disabled)?  If so that is probably hurting my backup speed much more than
> >the compression ever improved it.  Is there any way to prevent this short
> >of adding one of these options for every type of compressible file?
> >
> >EXCLUDE.COMPRESSION "*:\...\*.jpg"
> >EXCLUDE.COMPRESSION "*:\...\*.zip"
>
>
> --
> Paul Zarnowski                            Ph: 607-255-4757
> Assistant Director for Storage Services   Fx: 607-255-8521
> IT at Cornell / Infrastructure            Em: psz1 AT cornell DOT edu
> 719 Rhodes Hall, Ithaca, NY 14853-3801
>