Re: [ROOT] Warnings for in-memory compression...

From: Chitov Iouri (chitov@lal.in2p3.fr)
Date: Tue Apr 02 2002 - 10:03:43 MEST

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Hi, Rene,

Preparing short test for you I found mistake in my program! :))))

Initializing TEvent like pointer:

TEvent *fEvent = new TEvent();

I created branch sending **TEvent instead of *TEvent!:

fTEvent->Branch("Event","TEvent",&fEvent,32000,99);
                                 ~~~~~~~
Corrected line:

fTEvent->Branch("Event","TEvent",fEvent,32000,99);

solved the problem!


Rene Brun wrote:

> Hi Yuriy,
>
> Could you send me a test as short as possible reproducing this problem?
> I left a print message in the compression algorithm when it fails
> to compress the buffer (this should not happen in principle).
> Note that when the compression fails, the results are still OK. The buffer
> is written non-compressed.
>
> Rene Brun
>
> Chitov Iouri wrote:
> >
> > Hi,
> >
> > With new ROOT version
> >
> > --------------------------------------------------------
> >   *******************************************
> >   *                                         *
> >   *        W E L C O M E  to  R O O T       *
> >   *                                         *
> >   *   Version   3.03/02     29 March 2002   *
> >   *                                         *
> >   *  You are welcome to visit our Web site  *
> >   *         http://root.cern.ch            *
> >   *                                         *
> >   *******************************************
> >
> > FreeType Engine v1.x used to render TrueType fonts.
> > Compiled for linux with thread support.
> >
> > CINT/ROOT C/C++ Interpreter version 5.15.34, Mar 5 2002
> > -------------------------------------------------------
> >
> > during creation of TTree ROOT file from binaries rawdata
> > from time to time I have now these warnings:
> >
> > Processing /exp/nemo/chitov/tgv/data/20311003.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311004.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311005.dat... OK!
> > R__zip: output buffer too small for in-memory compression
> > R__zip: output buffer too small for in-memory compression
> > R__zip: output buffer too small for in-memory compression
> > Processing /exp/nemo/chitov/tgv/data/20311006.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311007.dat... OK!
> > out_offset=14, len=31932, out_size=31932
> > R__zip: output buffer too small for in-memory compression
> > Processing /exp/nemo/chitov/tgv/data/20311008.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311009.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311010.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311011.dat... OK!
> > Processing /exp/nemo/chitov/tgv/data/20311012.dat... OK!
> > 12877 data events were saved in test.root
> >
> > With previous versions I never saw such warnings.
> > It seems, like the final results are the same...
> >
> > Is it enough to clarify situation or should I go deeper in
> > the problem?
> >
> > Best wishes,
> > Yuriy.

--
 ---/---> Chitov Yuriy        The more, the better...

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