> > >From news Tue Dec 15 16:30 MET 1998 > Path: cern.ch!claire.desy.de!not-for-mail > From: Stefan Stonjek <stonjek@mail.desy.de> > Newsgroups: cern.root > Subject: Missing events after h2root > Date: 15 Dec 1998 15:28:22 GMT > Organization: Deutsches Elektronen-Synchrotron (DESY) > Lines: 31 > Message-ID: <755v6m$hvc$1@claire.desy.de> > NNTP-Posting-Host: zedy05.desy.de > User-Agent: tin/pre-1.4-980818 ("Laura") (UNIX) (SunOS/5.5.1 (sun4m)) > Xref: cern.ch cern.root:2664 > Content-Type: text > Content-Length: 1459 > > Hello, > > I have a problem when I convert my existing HBOOK NTuple to root. > When I use h2root, the nuber of events is what I expect: > ****************************************************************************** > *Tree :h200 : Result * > *Entries : 1070694 : Total Size = 227934634 bytes File Size = 46696268 * > * : : Tree compression factor = 4.90 * > ****************************************************************************** > > When I open the file with root or with a program linked against the root > library I get a smaller number of events: > ****************************************************************************** > *Tree :h200 : Result * > *Entries : 939942 : Total Size = 200353854 bytes File Size = 41070358 * > * : : Tree compression factor = 4.90 * > ****************************************************************************** > > This deffinitly saves disk space but this is deffinitly not what I want. > > This behavior is reproduceble also in different version (2.00/12 and 2.00/13). > I would like to hear any hints to cure the problem. Thank You! > > Tschuess > Stefan > Hi Stefan, I am convinced that you have used h2root from version 2.00/12. By default, Root autosaves the Tree header every 100 Mbytes. In your case, you see the second cycle of the Autosave after 200 Mbytes. Version 2.00/12 had a problem when more than one cycle of an object was written to a file. This was fixed in 2.00/13. See release notes. Please convert your file with h2root from version 2.00/13 and let me know. Rene Brun
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