Hi Urs,
in your detailed mail I fail to understand what are the plans as far as
SP5 and run1-3 data are concerned. I do not think that a mixture of
release 12/ CM2 data-MC is a possible data sample for publication, so I believe that the
production/publication plan needs to account for the CM2 production of
run1-3 and SP5 (with old style ntuples if we agree to).
So my suggestion would be to produce the large ntuples in the order:
- run4 data
- SP6
- run1-3 data
- SP5

Among the manpower we also have the QM group, which could take care of the
last 2 bullets (besides getting started in the analysis). I would leave
running on SP5 R12 as the very last resort if all else fails (but then we
are not the only ones in trouble)
ciao
ric

______________________________________________________
Riccardo Faccini
Universita' "La Sapienza" & I.N.F.N. Roma
tel +39/06/49914798 Fax.: +39/06/4957697
http://www.slac.stanford.edu/~rfaccini
Univ. La Sapienza. 2,Ple Aldo Moro, I-00185 Roma Dipartimento di Fisica

"I don't understand what you say, but I believe I disagree"

On Tue, 13 Apr 2004, Urs Langenegger wrote:

>
> [the following is a kind-of consensus between HD/RHUL/SLAC or wishful
> thinking that would provide benefits on the short time scale]
>
>
> Hoi,
>
> after a few phone calls, it seems that a new option is emerging.
> Below you find a proposal, please let me know if you disagree. If I
> hear nothing from you, I'll send this to vub-recoil after Easter.
>
>
> The situation
> -------------
>
> o Currently, analysis-20 is being built and close to release. The
> executable is expected to be about as fast as an OBJY exe ("a bit
> slower"). It should be capable of running on OBJY micro.
>
> o At the end of next week, a substantial amount of skimmed data is
> expected to become available (as of now it's only 60/fb). By then
> it might be something like 130/fb. Maybe/hopefully.
>
> o Clare needs (or would like to use) more than just 80/fb for her
> thesis.
>
> o The same is more or less true for the b2ulnu analysis (and Ed's
> thesis)
>
> o The projection for skimmed MC CM2 availability is slipping. At
> the Wednesday physics meeting we heard "June".
>
>
> The idea
> --------
>
> o Produce new ntuples with minimal (=no) changes with respect to the
> old "big" ntuples. Except: Just produce ROOT files. This allows to
> use them for analysis immediately and is probably the only way to
> use RUN3/4 data for public results before the end of this year.
>
> This is explicitly NOT a CM2 analysis, just an attempt to get more
> data for the short time scale.
>
> o Run on RUN4 CM2 data as more becomes available
>
> o Run on MC as soon as possible. We should test whether running on
> SP5 OBJY is viable.
>
>
> The plan
> --------
>
> o Ed will provide a set of tags to build IslBrecoilUserApp, based on
> analysis-20. He will do basic validation, i.e. that it is running.
> This also includes tcl (steering) files for CM2 and OBJY running.
>
> o Urs will do a bit more of validation, looking at all variables in
> the "h1" tree.
>
> o Royal Holloway will organize the production. I think this will
> involve the following:
>
> - backup the current HBOOK ntuples of Henning/Oliver to mstore
> and/or RAL or somewhere else.
>
> - Create tcl files for skimmed data. In the following I detail
> what issues must be considered in a low-tech approach (based
> on "run", the run-script with built-in bookkeeping and
> optimized queue saturation :-) Other possibilities exist of
> course, I just don't know them. Whoever organizes the
> production is free to choose whatever works!
>
> + The naming scheme for the "basename" should be well
> designed. In the last production we had a bit of a mess and
> it made life difficult. . A possible solution is something
> like the following:
>
> genbch-run1-.....
> genbnu-run1-.....
> genccb-run1-.....
> genuds-run1-.....
>
> cktbch-run1-.....
> cktbnu-run1-.....
> cktb2u-run1-.....
>
> b2unre-run1-.....
> b2ures-run1-.....
> b2umix-run1-.....
>
>
> NOTE: The total amount of files will likely exceed 100000.
> (We had something like 30k for the previous production.)
>
> NOTE: We used to have something like 2k events per file. We
> have to think whether we want to merge the rootfiles to
> reflect the merged CM2 files. Another possibility is to have
> in the filename (in the ..... part above) the start and end
> events in the merged CM2 files (see next item if this NOTE
> is not clear).
>
> + The size of the tcl files needs to be optimized for the
> queue length. (kanga?)
>
> NOTE: I think this could mean that we cannot run one job per
> CM2 merged skim file. This needs to be studied!!!
>
> + The tool of choice is probably "BbkDatasetTcl".
>
> + I think that the tcl files should be in a logical directory
> structure to avoid too many files per directory
>
> $BASE/tcl/SemiExclBreco-2004a/data
> $BASE/tcl/SemiExclBreco-2004a/data/run1
> $BASE/tcl/SemiExclBreco-2004a/data/run2
> $BASE/tcl/SemiExclBreco-2004a/data/run3
> $BASE/tcl/SemiExclBreco-2004a/data/run4
>
> $BASE/tcl/SemiExclBreco-2004a/mc
> $BASE/tcl/SemiExclBreco-2004a/mc/run1
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/bch
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/bnu
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/ccb
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/uds
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/sig
> $BASE/tcl/SemiExclBreco-2004a/mc/run1/ckt
>
> - The output root files should be stored in a way that reflects
> this structure:
>
> $BASE/output/SemiExclBreco-2004a/data
> $BASE/output/SemiExclBreco-2004a/data/run1
> $BASE/output/SemiExclBreco-2004a/data/run2
>
> $BASE/output/SemiExclBreco-2004a/mc/run1
> $BASE/output/SemiExclBreco-2004a/mc/run1/bch
>
>
> - A few notes on the directories:
>
> + It does not really matter what names we choose, but it
> should be something that is consistent and extensible to
> new productions, which could end up in, e.g.
>
> $BASE/SemiExclBreco-2004b/
>
> + We should avoid too many subdirectories, but should make
> sure that not too many files end up in one directory.
> (Note: In the old production, 80/fb data and 240/fb MC, we
> had 11000 gen B+ files in total.)
>
> + Not all directories need to be physically below $BASE, they
> could be symbolic links to a different disk. But we should
> see all from one base location.
>
>
> - Of course, the logfiles should be stored similarly:
>
> $BASE/log/SemiExclBreco-2004a/data
> $BASE/log/SemiExclBreco-2004a/mc
>
> and the corresponding subdirectories. If we use "run" this is
> essential.
>
> - The jobs will be run by a bunch of people, organized (and
> tabulated) by someone. "Volunteers" so far are
>
> Clare
> Ed
> Henning
> Rolf
> Urs
> Oliver ('s account, at least)
> Other GradStudents
>
> Given this amount of manpower, we might actually get through
> the unskimmed SP5 OBJY (700/fb!) on a relatively(?) short
> timescale.
>
> o Diskspace might be sufficient once we delete the old HBOOK files
> (from the previous production) and then ask for some more when
> it's critical and we have enough momentum.
>
>
> Cheers,
> --U.
>