[IGS-DCWG-195] Re: compression file changes ...

[Markus.Goltz at bkg.bund.de]

Dear Nacho,

a short statement from BKG-GDC:

1) Date sounds O.K.. Easiest way to change is via DCs. Should submitters be addressed at least in guidelines to use .gz? 
2) We tend to change compression for historic files also which would be more comfortable for users. We would change gradually. - I can see the point with syncing all these changes especially when all is done in different rates by the DCs.
3) We hope same procedure for compression will be agreed on in EUREF to keep processing consistent.

Regards,
Markus

________________________
Division G2 - Satellite Navigation
Federal Agency for Cartography and Geodesy

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Fax:    +49 (0)69 6333 425
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-----Ursprüngliche Nachricht-----
Von: IGS-DCWG [mailto:igs-dcwg-bounces at lists.igs.org] Im Auftrag von Nacho Romero
Gesendet: Dienstag, 8. Januar 2019 11:28
An: igs-dcwg at lists.igs.org; ic IGS List <igs-ic at lists.igs.org>; Lou Estey <lou at unavco.org>; David Maggert <dmaggert at unavco.org>; MacLeod, Ken <Ken.MacLeod at NRCan-RNCan.gc.ca>
Cc: gsfc-cddis-ops at lists.nasa.gov; Limbacher, Rebecca Irene. (GSFC-690.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] <rebecca.i.limbacher at nasa.gov>; mark.van.kints-esa.int <mark.van.kints at esa.int>
Betreff: [IGS-DCWG-188] compression file changes ...

Dear all,

At the last IGS workshop at the IC+DC splinter meeting we approved the recommendation ... 


2018-4. To coordinate DC, IC and NC so as to move away from Z compression for all IGS files (data and products) and into using gzip (.gz)




Please provide us comments on the following;

1) I propose that we announce this change now with the date 01 June 2019 , and at that point we publish all the newly submitted files (data and products) as .gz in all IGS DCs, whether the owner submits it that way or not ... do you agree that DCs should enforce such a change or should we insist all the owners transition their own submitted files? 





2) Do we change all the historical files to .gz ? This will generate "new files" which the myriad of sync processes (private and public) running between all sort of servers will cause a lot of duplications ... I propose we leave the old files as they are for now to avoid a lot of potential duplication of files in IGS and user's servers 


3) are you aware of specific places were the .Z compression is requested? required? recommended? ... I think the site guidelines are generic enough, what do you think?





We have some other recommendations to discuss with you in the next few days, and in the next months I will organize a telecon so we can all agree a way forward for each one.

Please let us know your comments on this specific recommendation and I will collate all the discussion points for the coordination telecon. Thanks.


-- 
Best regards,
Nacho
_______________________________________________________________

Ignacio (Nacho) Romero
Aerospace Engineer, PhD
CSC Ltd @ ESA/ESOC/OPS-GN
Satellite Navigation Engineer @ ESOC Navigation Support Office
IGS Infrastructure Committee Chair
www.navigation-office.esa.int <http://www.navigation-office.esa.int> 
www.canaryspaceconsulting.co.uk <http://www.canaryspaceconsulting.co.uk> 
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