Stefan I forgot to ask - what version of TSM?

Have you tried watching from Linux with collectl, iotop or something
similar while performing storage pool writes?

Are reads from storage pools also slow?

Best regards,

Mike <http://rbbuswiki.bbg.roche.com/wiki/ryderm_page:start>, x7942
RMD IT Client Services <http://rmsit.dia.roche.com/Pages/default.aspx>

On Fri, Nov 13, 2015 at 9:06 AM, Stefan Folkerts <stefan.folkerts AT gmail DOT 
com>
wrote:

> >Can you provide details on the physical storage?
>
> exp2524 via Megaraid 5120
> EXT3 filesystem
> SLES11 SP3
> Yes, we tuned the sysctl.conf file
> I can't get to the devclass definition right now but the default DISK
> device class has the same issue as my FILE device class as soon as there is
> a storage on top of it.
> I don't think it's the battery since a cp or dd on linux is blazing along
> at 220-300MB/s, but TSM can only do 10-15MB/s to a disk / file based
> storage pool.
>
> I know TSM can use certain flags when writing to storagepools that change
> the cache behaviour, what I don't know is what I need to set it to for it
> to be fast. :-)
>
> Regards,
>    Stefan
>
>
> On Fri, Nov 13, 2015 at 1:26 PM, Ryder, Michael S <
> michael_s.ryder AT roche DOT com
> > wrote:
>
> > Stefan
> >
> > Can you provide details on the physical storage?  What filesystem is in
> > use?  What version of Linux?  Did the installer configure and tune OS
> > parameters as indicated by TSM installation documentation?  Are you
> allowed
> > to share the devclass and storage pool definitions?
> >
> > Mike
> >
> > On Friday, November 13, 2015, Stefan Folkerts <stefan.folkerts AT gmail DOT 
> > com
> >
> > wrote:
> >
> > > Hello all,
> > >
> > > We have a situation where one of our customers is showing very slow
> > > performance on writing to a disk or file type storage pool on disk.
> > >
> > > Writing to tape with TSM is fast.
> > > Writing a database backup to disk is fast (this writes to the same
> drives
> > > but it writes to the devclass definition and not the storagepool
> > definition
> > > of course)
> > > Writing to a disk or file type storagepool is very slow (10-15MB/s)
> > > Writing to the same disk in Linux is fast (200+ MB/s)
> > >
> > > I found and read this article:
> > > http://www-01.ibm.com/support/docview.wss?uid=swg21137676
> > >
> > > But before I make a call with IBM I was hoping some of you might know
> the
> > > correct settings for disk/file type storagepools on this type of local
> > > storage.
> > >
> > > Regards,
> > >     Stefan
> > >
> >
> >
> > --
> >
> > Best regards,
> >
> > Mike <http://rbbuswiki.bbg.roche.com/wiki/ryderm_page:start>, x7942
> > RMD IT Client Services <http://rmsit.dia.roche.com/Pages/default.aspx>
> >
>