LISTSERV mailing list manager LISTSERV 16.5

Help for XROOTD-L Archives


XROOTD-L Archives

XROOTD-L Archives


XROOTD-L@LISTSERV.SLAC.STANFORD.EDU


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

XROOTD-L Home

XROOTD-L Home

XROOTD-L  September 2019

XROOTD-L September 2019

Subject:

Re: python :: cp process fails when it shouldn't (another utility can download file)

From:

Adrian Sevcenco <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Wed, 11 Sep 2019 16:06:26 +0300

Content-Type:

multipart/signed

Parts/Attachments:

Parts/Attachments

text/plain (394 lines) , smime.p7s (394 lines)

On 9/11/19 12:15 PM, Michal Kamil Simon wrote:
> Hi Adrian,
Hi!

> Your ZIP file you use for testing is compressed, for now we only support 
> extraction from ZIP files
> that are not compressed (our use case are ROOT files that use ZIP format 
> only for bundling).
oh...

> You can create an uncompressed ZIP file for testing using following command:
> *zip -0 foo.zip /path/to/files/foo*
all ALICE data and MC central productions are stored in compressed zip 
files.. so it does not matter the use case of uncompressed zips

Is there any chance to have also the extraction from compressed zips?

In my naive thinking is that if you use anyway vector reads to read the
central directory record and then the file entries (local file header, 
encryption file header, file data and data descriptor) you can use the 
info from local file header to decompress the data
(from what i see at first glance in 
https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT)

Or should i go towards downloading the zip file to temporary and extract 
the needed files on the client?

Thanks a lot!!
Adrian



> 
> Cheers,
> Michal
> ________________________________________
> From: Adrian Sevcenco
> Sent: 11 September 2019 09:59
> To: Michal Kamil Simon; [log in to unmask]
> Subject: Re: python :: cp process fails when it shouldn't (another 
> utility can download file)
> 
> On 9/10/19 2:27 PM, Michal Kamil Simon wrote:
>  > Hi Adrian,
> Hi Michal!
> 
>  > Yes, this should also work from python.
>  >
>  > You just need to add the ?xrdcl.unzip=fn to the metalink url (nothing 
> else), also remove the #fn from the files
>  > inside the metalink.
> well, it is not working and i get this kind of messages:
> jobID: 1/1 >>> STATUS: 1 ; ERRNO: 0 ; CODE: 13 ; MESSAGE: [ERROR]
> Operation not supported: Decompression is not supported!
> 
> full xrootd log, and my cli debug output (and metalink) are here:
> https://cernbox.cern.ch/index.php/s/JNaLKsaC5pyrhMP
> 
> the actual metalink was named with % but it seems that EOS have a bug
> and deletes the files with % in names (i cannot copy through webdav the
> original meta file)
> 
> Thanks a lot!!
> Adrian
> 
> 
>  >
>  > To make the xrdcl.unzip work for the links/files inside metalink is 
> more complicated, if this is something
>  > you would be interested in, please create an issue in github, but I 
> don't think we will be able to accommodate
>  > this feature request for 4.10.1.
>  >
>  > It is the client that is extracting the file from the zip archive - 
> basically the client reads the central directory record
>  > of the zip archives in order to know the offset of the respective 
> file within the archive.
>  >
>  > Cheers,
>  > Michal
>  > ________________________________________
>  > From: Adrian Sevcenco
>  > Sent: 10 September 2019 13:11
>  > To: Michal Kamil Simon; [log in to unmask]
>  > Subject: Re: python :: cp process fails when it shouldn't (another 
> utility can download file)
>  >
>  > On 9/10/19 1:22 PM, Michal Kamil Simon wrote:
>  >> Hi Adrian,
>  > Hi!
>  >
>  >> Thanks for reporting this problem!
>  >>
>  >> I just pushed a patch that will allow for adding opaque info to 
> local files:
>  >> 
> https://github.com/xrootd/xrootd/commit/45f4d8cf1cf2e7bdfc69c461dd47d45ae838748c
>  > great! thanks a lot!!!
>  >
>  >> with this fix you will be able to add the '?xrdcl.unzip=fn' cgi to 
> the local metalink (I run some tests
>  >> and it extracts the right file correctly).
>  > So, would this metfile.meta4?xrdcl.unzip=zipped_file work for the python
>  > copyProcess?
>  >
>  > Also, would these parameters be added? (the url from metalink have the
>  > ALICE authorization envelope)
>  >
>  >> The patch will be included in 4.10.1 which we are now preparing.
>  > any chance of adding this feature also to the links from within the
>  > metalink? i do not know what is happening within, so i just ask :)
>  >
>  > If the unziping is done on the server side, maybe it would make more
>  > sense to work with actual url (from metalink), the way that you
>  > initially told me to do?
>  >
>  > Thanks a lot!
>  > Adrian
>  >
>  >
>  >
>  >>
>  >> Cheers,
>  >> Michal
>  >> ________________________________________
>  >> From: Adrian Sevcenco
>  >> Sent: 09 September 2019 12:18
>  >> To: Michal Kamil Simon; [log in to unmask]
>  >> Subject: Re: python :: cp process fails when it shouldn't (another 
> utility can download file)
>  >>
>  >> On 9/9/19 12:56 PM, Michal Kamil Simon wrote:
>  >>> Hi Adrian,
>  >>>
>  >>> Could you try adding the /xrdcl.unzip=AliAOD.root/ cgi to the original
>  >>> metalink URL, like:
>  >>>
>  >>> 
> file://localhost/home/adrian/tmp/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> well, i do not think that the argument understand something else than a
>  >> file :
>  >>
>  >> ll
>  >> total 3266976
>  >> -rw-r--r-- 1 adrian adrian 3345375231 Sep 9 13:06 AliAOD.root.zip
>  >> -rw-rw-r-- 1 adrian adrian 3289 Sep 9 13:02
>  >> 
> _alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4
>  >>
>  >> xrdcp -p -P -f
>  >> 
> _alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> AliAOD.root
>  >> xrdcp: No such file or directory processing
>  >> 
> _alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >>
>  >> xrdcp -p -P -f
>  >> 
> file://localhost/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> AliAOD.root
>  >> xrdcp: No such file or directory processing
>  >> 
> /_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >>
>  >> xrdcp -p -P -f
>  >> 
> file://localhost/${PWD}/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> AliAOD.root
>  >> xrdcp: No such file or directory processing
>  >> 
> //home/adrian/work-GRID/jalien_py/t/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >>
>  >> xrdcp -p -P -f
>  >> 
> file:///localhost/${PWD}/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> AliAOD.root
>  >> xrdcp: No such file or directory processing
>  >> 
> /localhost//home/adrian/work-GRID/jalien_py/t/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >>
>  >> xrdcp -p -P -f
>  >> 
> file://${PWD}/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >> AliAOD.root
>  >> xrdcp: No such file or directory processing
>  >> 
> /home/adrian/work-GRID/jalien_py/t/_alice_data_2018_LHC18m_000291397_pass1_withTRDtracking_AOD208_0884_AliAOD.root.meta4?xrdcl.unzip=AliAOD.root
>  >>
>  >> Thank you!
>  >> Adrian
>  >>
>  >>>
>  >>> (it seems that there's a friction between the metalink handling and zip
>  >>> archive handling)
>  >>>
>  >>> Cheers,
>  >>> Michal
>  >>> ________________________________________
>  >>> From: Adrian Sevcenco
>  >>> Sent: 06 September 2019 16:30
>  >>> To: Michal Kamil Simon; [log in to unmask]
>  >>> Subject: Re: python :: cp process fails when it shouldn't (another
>  >>> utility can download file)
>  >>>
>  >>> Hi Michal!
>  >>>
>  >>> On 9/2/19 5:52 PM, Michal Kamil Simon wrote:
>  >>> > Yep, it looks about right :-)
>  >>> so, i use ?xrdcl.unzip=AliAOD.root&authz=TOKEN
>  >>> format but it seems that the zipfile is downloaded instead of file
>  >>> extracted from archive...
>  >>>
>  >>> the detailed log is here:
>  >>> https://cernbox.cern.ch/index.php/s/JNaLKsaC5pyrhMP
>  >>>
>  >>> do you have any idea/hint why the file is not extracted?
>  >>>
>  >>> Thanks a lot!!
>  >>> Adrian
>  >>>
>  >>>
>  >>>
>  >>> >
>  >>> > Michal
>  >>> > ________________________________________
>  >>> > From: Adrian Sevcenco
>  >>> > Sent: 02 September 2019 16:46
>  >>> > To: Michal Kamil Simon; [log in to unmask]
>  >>> > Subject: Re: python :: cp process fails when it shouldn't (another
>  >>> utility can download file)
>  >>> >
>  >>> > On 9/2/19 5:29 PM, Michal Kamil Simon wrote:
>  >>> >> Hi Adrian,
>  >>> > Hi!
>  >>> >
>  >>> >> You can replace the '#' with '?xrdcl.unzip=' however you have to 
> make
>  >>> >> sure that if the URL
>  >>> >> already contains a CGI you have to replace the following '?' 
> with '&',
>  >>> >> e.g. :
>  >>> >>
>  >>> >>
>  >>> 
> root://eosalice.cern.ch:1094//15/62933/56da6906-9149-11e7-ba1b-579516ed5c66*#*AliAOD.root*?*authz=LONG_ALICE_TOKEN
>  >>> >>
>  >>> >> gets transformed into:
>  >>> >>
>  >>> >>
>  >>> 
> root://eosalice.cern.ch:1094//15/62933/56da6906-9149-11e7-ba1b-579516ed5c66*?xrdcl.unzip=*AliAOD.root*&*authz=LONG_ALICE_TOKEN
>  >>> >
>  >>> > yeap, is doable as the full url (physical url + token) is 
> constructed by
>  >>> > me... so i can do something like :
>  >>> >
>  >>> > pfn_components = pfn.split('#') # i have the guarantee that the files
>  >>> > that ALICE uploads have no # in name
>  >>> >
>  >>> > if len(pfn_components) > 1:
>  >>> > full_url = pfn + '?xrdcl.unzip=' + pfn_components[1] +
>  >>> > '&authz=LONG_ALICE_TOKEN'
>  >>> > else:
>  >>> > full_url = pfn + '?authz=LONG_ALICE_TOKEN'
>  >>> >
>  >>> > Does it sound right?
>  >>> > Thanks a lot for help!!
>  >>> > Adrian
>  >>> >
>  >>> >
>  >>> >
>  >>> >>
>  >>> >>
>  >>> >>
>  >>> >> Regarding the /CopyProcess.add_job(...)/ method I could add 
> parameters
>  >>> >> that will allow
>  >>> >> to specify the file name for extraction from zip archive.
>  >>> >>
>  >>> >> Regarding supporting the '#' root native format we will have to 
> see with
>  >>> >> Andy whether this
>  >>> >> wont harm any existing use cases (as # is a legal character that 
> could
>  >>> >> be used a file name).
>  >>> >>
>  >>> >> Cheers,
>  >>> >> Michal
>  >>> >> ________________________________________
>  >>> >> From: Adrian Sevcenco
>  >>> >> Sent: 02 September 2019 15:37
>  >>> >> To: Michal Kamil Simon; [log in to unmask]
>  >>> >> Subject: Re: python :: cp process fails when it shouldn't (another
>  >>> >> utility can download file)
>  >>> >>
>  >>> >> On 9/2/19 2:09 PM, Michal Kamil Simon wrote:
>  >>> >> > Hi Adrian,
>  >>> >> Hi!
>  >>> >>
>  >>> >> > >From what I see in the logs you use the following file name:
>  >>> >> >
>  >>> >> >
>  >>> >>
>  >>> 
> root://eosalice.cern.ch:1094//15/62933/56da6906-9149-11e7-ba1b-579516ed5c66#AliAOD.root
>  >>> >> >
>  >>> >> > The '#' is root syntax for unpacking root files, this is not 
> supported
>  >>> >> > in the
>  >>> >> > xrootd client, instead you have to use the /xrdcl.unzip/ cgi 
> tag, e.g.
>  >>> >> >
>  >>> >> >
>  >>> >>
>  >>> 
> root://eosalice.cern.ch:1094//15/62933/56da6906-9149-11e7-ba1b-579516ed5c66?xrdcl.unzip=AliAOD.root
>  >>> >>
>  >>> >> oh!!! so, could i use a simplistic logic like :
>  >>> >> replace latest '#' from string with '?xrdcl.unzip='
>  >>> >>
>  >>> >> ALICE stores files in the form of GUID (that last uid)
>  >>> >> and when i request access to a lfn i get the guid and the authz 
> envelope
>  >>> >> for accessing the file ... so, it is guaranteed that i will 
> always get a
>  >>> >> url with a GUID ...
>  >>> >>
>  >>> >> Given this, do you thing that i could use the logic from above?
>  >>> >>
>  >>> >> > alternatively I can expose extracting of zip files (root files 
> use zip
>  >>> >> > format for bundling)
>  >>> >> > in the /CopyProcess.add_job(...)/ method.
>  >>> >> that would be great! if it is possible it would be best if
>  >>> >> the same format of '#file' is recognized (as this is the url 
> that i get
>  >>> >> when requesting lfn access)
>  >>> >>
>  >>> >> Thanks a lot!!
>  >>> >> Adrian
>  >>> >>
>  >>> >> >
>  >>> >> > Hope this helps!
>  >>> >> >
>  >>> >> > Cheers,
>  >>> >> > Michal
>  >>> >> >
>  >>> >> > ________________________________________
>  >>> >> > From: Adrian Sevcenco
>  >>> >> > Sent: 01 September 2019 22:13
>  >>> >> > To: [log in to unmask]
>  >>> >> > Cc: Michal Kamil Simon
>  >>> >> > Subject: python :: cp process fails when it shouldn't (another 
> utility
>  >>> >> > can download file)
>  >>> >> >
>  >>> >> > Hi! I have a really baffling situation where my python tool cannot
>  >>> >> > download a file and another tool (java based, use xrdcp) can 
> download
>  >>> >> > the same file ...
>  >>> >> >
>  >>> >> > the detailed logs for my cp are here :
>  >>> >> > https://cernbox.cern.ch/index.php/s/JNaLKsaC5pyrhMP
>  >>> >> >
>  >>> >> > the java based tool it seems that somehow ignores the external 
> XRD_
>  >>> >> > variables so i cannot get a log of cp process
>  >>> >> >
>  >>> >> > Could some expert take a look please and point me to a hint 
> why my cp
>  >>> >> > fails and the other tool can download just fine?
>  >>> >> >
>  >>> >> > Thank you!!
>  >>> >> > Adrian
>  >>> >> >
> 


-- 
----------------------------------------------
Adrian Sevcenco, Ph.D.                       |
Institute of Space Science - ISS, Romania    |
adrian.sevcenco at {cern.ch,spacescience.ro} |
----------------------------------------------


########################################################################
Use REPLY-ALL to reply to list

To unsubscribe from the XROOTD-L list, click the following link:
https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

March 2024
February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
October 2022
September 2022
August 2022
July 2022
June 2022
May 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
July 2009
June 2009
May 2009
April 2009
March 2009
January 2009
December 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
October 2004
September 2004
August 2004

ATOM RSS1 RSS2



LISTSERV.SLAC.STANFORD.EDU

Secured by F-Secure Anti-Virus CataList Email List Search Powered by the LISTSERV Email List Manager

Privacy Notice, Security Notice and Terms of Use