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  November 2004

XROOTD-L November 2004

Subject:

Re: java client for xrootd

From:

Peter Elmer <[log in to unmask]>

Date:

26 Nov 2004 18:28:11 +0100Fri, 26 Nov 2004 18:28:11 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (264 lines)

  Hi Alvise,

  Ok, thanks, I've copied it and linked it from the xrootd page....

                                   Pete

On Fri, Nov 26, 2004 at 04:35:25PM +0100, Alvise Dorigo wrote:
> Hi Pete,
> a new version of java client is at
> 
> http://www.slac.stanford.edu/~dorigoa/XrdCopyFile_20041126.jar
> 
> these are the fixes: OKSOFAR mechanism has been fixed and is working.
> These tests have been done deeply in SYNC mode and without making the 
> server crash:
> 
>  1.  One server, 1 client reading
>  1b. One server, 1 client reading w/ oksofar
>  1c. One server, multiple clients reading w/ oksofar
>  2.  One server, 1 client writing
>  3.  One server, 1 client reading/writing
>  3a. One server, 1 client reading/writing w/ oksofar
>  4.  One server, multiple clients reading
>  5.  One server, multiple clients writing
>  6.  One server, multiple clients reading/writing
> 
> When I say reading/writing I mean that 1 or more clients read from a 
> remote file through xrootd and write on another remote file always 
> through xrootd (shortly: an xrdcp mono-threaded or multithreaded).
> When I say One server I mean only one dataserver and then only one 
> physical channel on which the connection manager multiplexes 1 ore more 
> clients. This ensures that the semaphore mechanism on the tcp channel 
> works well.
> 
>    Alvise
> 
> Peter Elmer wrote:
> 
> > Hi Alvise,
> >
> > Very cool: accessing xrootd from cell phones! I've copied the jar file
> >into the xrootd area and made links from the xrootd page.
> >
> >                                thanks,
> >                                  Pete
> >
> >On Thu, Nov 25, 2004 at 10:22:57AM +0100, Alvise Dorigo wrote:
> > 
> >
> >>Hi Peter, Andy,
> >>a Mobile version of the Java xrootd client is available at
> >>
> >>http://www.slac.stanford.edu/~dorigoa/NetFileStream.jar
> >>
> >>(it is not an 'obfuscated' package so you can reverse-engineer it)
> >>
> >>Note 1: A Java Mobile Virtual Machine compliant with MIDP 2.0/CLDC 1.1 
> >>is required in the mobile device in order to correctly run the client; 
> >>AFAIK the following models support it for sure: Sony-Ericsson Z1010, 
> >>Motorola A1000/E1000, *NEC e228/338/e616V.
> >>
> >>Note 2: Some device like PalmOS, WinCE compatible palm and so on, have a 
> >>custom JVM unable to run MIDP applications. The free WABA JVM is unable 
> >>to run NetFileStream.jar because has a completely proprietary library 
> >>for socket and record database.
> >>*
> >>Note 3: The client now is only a demo: just insert the URL on the remote 
> >>file (must be an ASCII and short file because its content, and its size, 
> >>will be displayed on the mobile device screen) and press 'OK'. No 
> >>log/error messages are displayed at the moment so you must take a look 
> >>at the server log if something goes wrong.
> >>
> >>Note 4: Every Mobile device model hai its proprietary way to deploy/run 
> >>the jar application into the device RAM, so I won't describe any method 
> >>here. Some model has a software facility to do that very easily (only 
> >>under Windows); in other models (like the old Motorola A835) the Java 
> >>loader menu is HIDDEN (!), for marketing reasons (I unlocked it some 
> >>time ago), I think... Google can help has usual for any problem.
> >>
> >>  Alvise
> >>
> >>Peter Elmer wrote:
> >>
> >>   
> >>
> >>>Hi Alvise,
> >>>
> >>>On Wed, Nov 24, 2004 at 12:26:47PM +0100, Alvise Dorigo wrote:
> >>>
> >>>
> >>>     
> >>>
> >>>>Peter Elmer wrote:
> >>>> 
> >>>>
> >>>>       
> >>>>
> >>>>>On Wed, Nov 24, 2004 at 12:16:28PM +0100, Alvise Dorigo wrote:
> >>>>>
> >>>>>
> >>>>>   
> >>>>>
> >>>>>         
> >>>>>
> >>>>>>ok, Pete. Honestly Windows is a world to test yet...
> >>>>>>
> >>>>>>     
> >>>>>>
> >>>>>>           
> >>>>>>
> >>>>>No problem. At least there is something to play with. (I added Tony as
> >>>>>I know he was looking at xrootd access for JAS.)
> >>>>>
> >>>>>
> >>>>>   
> >>>>>
> >>>>>         
> >>>>>
> >>>>What's JAS ? Is Tony interested in the java client ? this is 
> >>>>encouraging...
> >>>> 
> >>>>
> >>>>       
> >>>>
> >>>For JAS see:
> >>>
> >>>http://jas.freehep.org/
> >>>
> >>>Regarding ROOT I/O and JAS, see his talk at CHEP:
> >>>
> >>>http://indico.cern.ch/contributionDisplay.py?contribId=400&sessionId=6&confId=0
> >>>
> >>>IIRC, he had started to work on a Java client, but was aware (since I 
> >>>mentioned it at CHEP) that you were working on this...
> >>>
> >>>                                Pete
> >>>
> >>>
> >>>
> >>>     
> >>>
> >>>>>>is >~140 kB a large attach ? ok I wont do this kind attachment in 
> >>>>>>future.
> >>>>>>
> >>>>>>
> >>>>>>     
> >>>>>>
> >>>>>>           
> >>>>>>
> >>>>>Large is all relative, but in this case the limit was set low enough to
> >>>>>discourage non-trivial attachments altogether. You know how much I like
> >>>>>them.... ;-)
> >>>>>
> >>>>>                              Pete
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>   
> >>>>>
> >>>>>         
> >>>>>
> >>>>>>Peter Elmer wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>     
> >>>>>>
> >>>>>>           
> >>>>>>
> >>>>>>>Hi Alvise,
> >>>>>>>
> >>>>>>>On Wed, Nov 24, 2004 at 11:14:07AM +0100, Alvise Dorigo wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>> 
> >>>>>>>
> >>>>>>>       
> >>>>>>>
> >>>>>>>             
> >>>>>>>
> >>>>>>>>I recently fixed a number of bugs. Please use the new jar in attach 
> >>>>>>>>instead of that one I sent to you some day ago. Now in the source 
> >>>>>>>>and destination argument of XrdFileCopy you can omit the TCP_PORT 
> >>>>>>>>number (it will try to get it from /etc/services under linux and 
> >>>>>>>>from c:\\winnt\\system32\\drivers\\etc\\services under WinNT/XP, 
> >>>>>>>>otherwise default=1094); in addition a 3rd parameter cab be passed 
> >>>>>>>>to specify the size of copy chunk (larger chunk means more copy 
> >>>>>>>>speed, default chunk size is 256 kB) so:
> >>>>>>>>
> >>>>>>>>java- jar XrdCopyFile.jar xroot://<USER>@<HOST>/SRC_PATHFILE 
> >>>>>>>>xroot://<USER>@<HOST>/TARGET_PATHFILE [CHUNK_SIZE_IN_KB]
> >>>>>>>>
> >>>>>>>>Note 1: The ASYNC communication has been deeply tested with 10 
> >>>>>>>>concurrent clients repeatedly reading from the same file and from 
> >>>>>>>>the same server (this to put all clients on the same physical 
> >>>>>>>>channel). No server-crash during reading has been triggered yet, 
> >>>>>>>>but it will be done asap. The server-crash tolerance has been fully 
> >>>>>>>>tested with 1 and more client in SYNC mode.
> >>>>>>>>
> >>>>>>>>Note 2: Some data corruption takes place when "oksofar" is handled, 
> >>>>>>>>that means that copying files using chunks > 2MB can create data 
> >>>>>>>>corruption. I'll investigate.
> >>>>>>>>
> >>>>>>>>Note 3: The Java client is supposed to run under WindowNT/XP too 
> >>>>>>>>(please remember JDK1.5) but very few tests has been done: even if 
> >>>>>>>>Java is fully multiplatform everybody knows that small differences 
> >>>>>>>>are between platforms, versions and vedors... I developed and 
> >>>>>>>>tested under Fedora Core 3 Linux (kernel 2.6.9-1.667) Sun JDK 1.5.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>   
> >>>>>>>>
> >>>>>>>>         
> >>>>>>>>
> >>>>>>>>               
> >>>>>>>>
> >>>>>>>Ok, thanks: I've updated the jar file linked from the xrootd page. 
> >>>>>>>Very
> >>>>>>>nice that we have a windows client now, too....
> >>>>>>>
> >>>>>>>BTW, you can't send mails with large attachments to the mailing 
> >>>>>>>list. It
> >>>>>>>will bounce them. (And in general sending large attachments to 
> >>>>>>>mailing list
> >>>>>>>is bad practice.) You can probably just stick any future update 
> >>>>>>>files someplace at SLAC and send me the location so I can put it in 
> >>>>>>>the xrootd
> >>>>>>>web area...
> >>>>>>>
> >>>>>>>                            Pete
> >>>>>>>
> >>>>>>>       
> >>>>>>>
> >>>>>>>             
> >>>>>>>
> >>>
> >>>-------------------------------------------------------------------------
> >>>Peter Elmer     E-mail: [log in to unmask]      Phone: +41 (22) 767-4644
> >>>Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
> >>>-------------------------------------------------------------------------
> >>>
> >>>
> >>>     
> >>>
> >
> >
> >
> >-------------------------------------------------------------------------
> >Peter Elmer     E-mail: [log in to unmask]      Phone: +41 (22) 767-4644
> >Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
> >-------------------------------------------------------------------------
> > 
> >



-------------------------------------------------------------------------
Peter Elmer     E-mail: [log in to unmask]      Phone: +41 (22) 767-4644
Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
-------------------------------------------------------------------------


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

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