STAR Flow, Chirality and Vorticity PWG

[Cameron Racz <cracz001 AT ucr.edu>]

To add some more data to this I’d just like to add that, for my analysis of production_3p85GeV_fixedTarget_2018 (library SL20d), the amount of the picoDsts I can access fluctuates wildly between every attempt to analyze it. I should see around 275M good events and my most recent attempt accessed less than 25M successfully.

Since my flow analysis requires multiple iterations over the same data it’s becoming difficult to get any meaningful results. I will also be needing to reliably access the 7.2 GeV data that Ding is mentioning to fully prepare for the Quark Matter conference and this data problem is really slowing progress down for that.

Cameron Racz

Graduate Student

Dept. of Physics & Astronomy

University of California, Riverside

On Nov 30, 2021, at 9:32 PM, Ding Chen via Starsoft-l <starsoft-l AT lists.bnl.gov> wrote:

Dear FCV and experts,

I want to complain it is hard to access the full statistics of many datasets and it's not just me.

For Run19 19.6 GeV, analyzers find themselves needing to re-submit more than 8 times to get more than 80% of the statistics.

For Run18 FXT 3 (3.85)  GeV data, analyzers find the statistics are 20% less, need re-submit multiple times to reach 90% of the statistics.

For Run18 FXT 7.2 (26.5) GeV data, I can only get less than 50% percent of full statistics. 

Adding to that, many are bugged with the notorious "3011" error, which will kill the whole job if one file has such an error.

When the 7.2 GeV data was stored at NFS, I had no issue accessing the full statistics. I suspect that it's due to some issues on distributed disk (DD), or the communication with it, but I'm no expert on that. 

Since it impacts many analyses. I'd like to know why this is the problem and more importantly if there's any solution to that? 

Best regards,

Ding

--

Ding Chen

Graduate student - University of California, Riverside

dchen087 AT ucr.edu

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