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lofar-astron / factor

Facet calibration for LOFAR
http://www.astron.nl/citt/facet-doc
GNU General Public License v2.0
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Moving factor run to new directory #145

Closed eretana closed 7 years ago

eretana commented 7 years ago

Dear all.

I moved one factor run from a node to another one.

I just copy the WORKINGDIR, reset the facet that was incomplete, and edit the state files in addition to the parset to able to start the selfcal for the facet. The original MS files used to created the chunk files are in the same location.

It turns out that that the calibrator is not improving at all in the selfcalibration. It looks like much in each selfcal image. The selfcal reports an error at the end of the step, but nothing in the middle that gives you an idea if a file or missing or something

I was wondering if there is an path that must be edited somewhere to make it work again.

Looking at the self cal images for the facet in the original location, they look normal, the calibrator images does improve in each selfcal cycle. So, it discards the possibility that the data is not good at all.

Thanks for your help, Edwin.

AHorneffer commented 7 years ago

Factor uses a lot of (map-)files that store the absolute path to the files that is uses. So changing the working-directory is complicated. (Aka next to impossible.)

Maybe we can include this with the archiver/de-archiver: #89

eretana commented 7 years ago

Yes. but when a new facet is started, the absolute path must be taken from somewhere. So, it this path(s) are changed then it should be possible to start that direction.

twshimwell commented 7 years ago

maybe you can get around this with symbolic links Edwin?

duyhoang-astro commented 7 years ago

Symbolic links of 'chunks' and 'products' directories work for me.

rvweeren commented 7 years ago

Closed due to inactivity (fixed?). Re-open if necessary.