Name: ROOT Team Meeting
Start: 2007-06-22T11:00:00+02:00
End: 2007-06-22T12:50:00+02:00
Location: No location set

1

News

-Welcome to summer student with Ilka Roel Aaij (Ru Ai) - summer student working on the GUI -Bastien is progressing quickly with the spider plots (or like). He will talk at the next meeting. -PHYSTAT next week at CERN, see: http://phystat-lhc.web.cern.ch/phystat-lhc/ -Finance/Council meeting this week. Rumors are positive Quoting a mail from Pere "It seems that FC has approved the extra resources for the white paper. This means that SFT will be able to ensure some continuity. The draft figure that Jean-Jacques is talking about is 10 FTE for SFT operations for the years 2008-9-10 of a total of 117 FTE for the department. In addition to the operation, there is the possibility of extra resources (manpower and material) for R&D for a total of 33 FTE for the department. This is for the 3 projects (multi-core, virtualization, distribution) that we proposed last year." Meeting with CMS yesyerday to discuss -Automatic Schema Evolution requirements -I/O speed improvements (iterating today: they have trees with more than 2000 branches!) see minutes below The discussion started from the following documents: proposal by Chris: https://twiki.cern.ch/twiki/bin/view/CMS/FwEdmSchemaEvolutionProposal prototype by Vincenzo: https://twiki.cern.ch/twiki/bin/view/CMS/VISchemaEvolutionPrototype René evaluated CMS proposal and reported that all the required schema evolution cases are currently supported by ROOT. The most generic schema evolution requires, anyway, to define a custom streamer for the object types to be evolved. The following source code was brought as example: http://root.cern.ch/viewcvs/hist/src/TAxis.cxx?rev=1.83&content-type=text/vnd.viewcvs-markup Given the current ROOT development plans, there is no chance to add support the features proposed by CMS. On the other hand, René claimed that learning to write custom streamers should take a short amount of time. Though all agreed that schema evolution would feasible with the approach proposed by René, yet concerns were raised: * need to train a large number of data formats developers about writing custom streamers with large load on training on the offline group * introduction of explicit dependency on ROOT in CMS data formats library * possible error-prone code with explicit management in the C++ of the different version cases and proper ordering of data member in the file CMS will reconsider the proposed approach, given the constraints presented during the meeting. A possible alternative approach will be writing a CMS-specific layer that uses the proposed ROOT custom streamer internally shielding the details of ROOT streamers to the data formats developers.

2

Status before releasing 5.16 (27 June)

Release Status: Still to be implemented -Update to Release Notes before Monday evening -Import new version of CINT: Axel -Passing correctly the login script for remote login: Fons -API for creating/removing rootmaps for ACLIC: Fons -Fix problem with alice_itsd.C script (Matevz ?) -Fix for Fitpanel slider: Ilka -Qt saga: Ilka/Valeri (now fixed) -PROOF: minor changes by Gerri + Anna TEntryList mods Gerri -TAxis copy constructor when axis has labels: Rene -Anything else ?

3

Progress in reducing dictionaries size

Speaker: Leo Franco

4

Demo: Improvements in GL + Timur's new classes

Speaker: Matevz Tadel

5

Demo: Browser extensions with TGHtml/TWebFile and Remote login

Speaker: Bertrand Bellenot

6

AOB

Choose timezone

ROOT Team Meeting

32-1A24