Difference between revisions of "Accessing Swestore with the ARC client"

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[[Category:Grid computing]]
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#REDIRECT[[Swestore Documentation Moved]]
[[Category:Storage]]
 
[[Category:Swestore]]
 
[[Category:SweGrid user guide]]
 
[[Getting started with SweGrid|< Getting started with SweGrid]]<br>
 
[[Swestore National Storage|< Swestore National Storage]]
 
= Introduction =
 
 
 
(UNDER DEVELOPMENT)
 
 
 
The SNIC national storage infrastructure is implemented using dCache, which is a distributed storage system presenting the user with a single filesystem view. The front-end host of the system is srm://srm.swegrid.se which is the machine presenting the filesystem for the user.
 
 
 
The system uses VOMS proxy certificates for authentication. Please see, [[Grid certificates#VOMS certificates|VOMS Certificates]] , for information on how to generate a voms proxy certificate.
 
 
 
= Copying files =
 
 
 
Copying files to and from resources is accomplished using the '''arccp''' command. The command can handle many of existing protocols, such as: ''http, https, httpg, ftp, gsiftp, lfc, rls, srm''.
 
 
 
== Copying single files ==
 
 
 
Copying single files is accomplished in the same way as using the normal '''cp''' command as shown in the following example:
 
 
 
<pre>[jonas@localhost jonas2]$ arccp archive.tar.gz srm://srm.swegrid.se/ops/</pre>
 
 
 
== Recursive copying ==
 
 
 
Recursive copying is accomplished using the '''--recursive''' option. The argument to the option determines the depth of the recursive copy.
 
 
 
<pre>
 
[jonas@localhost swestore]$ arccp --recursive=3 jonas2/ srm://srm.swegrid.se/ops/jonas/jonas2/
 
</pre>
 
 
 
= Listing files =
 
 
 
Listing files on a resources is done using the '''arcls''' command. In the simplest form the command just takes a URL as input and displays names and directories without any extra information as shown in the following example:
 
 
 
<pre>
 
[jonas@localhost jonas2]$ arcls srm://srm.swegrid.se/ops/
 
motd.1
 
bla
 
generated
 
ops
 
motd.f343
 
GridFTP-1.0.20-linux.gtk.x86.zip
 
test23
 
test24
 
ronstestfile
 
ronstestfile3
 
testfile-put-1296854868-6468a2d5df07.txt
 
</pre>
 
 
 
Additional information can be listed by adding the '''--long''' option.
 
 
 
<pre>
 
[jonas@localhost swestore]$ arcls --long srm://srm.swegrid.se/ops
 
<Name> <Type> <Size> <Creation> <Validity> <CheckSum> <Latency>
 
motd.1 file 354 2008-06-05 12:28:23 (n/a) adler32:582d7718 NEARLINE
 
bla dir 512 2008-08-22 12:23:49 (n/a) (n/a) NEARLINE
 
generated dir 512 2008-11-17 15:07:39 (n/a) (n/a) NEARLINE
 
ops dir 512 2010-01-21 11:26:00 (n/a) (n/a) NEARLINE
 
motd.f343 file 436 2010-01-08 14:35:40 (n/a) adler32:0fed94f2 ONLINE
 
GridFTP-1.0.20-linux.gtk.x86.zip file 30479220 2011-03-09 09:49:20 (n/a) adler32:5c67686b ONLINE
 
test23 file 0 2011-03-04 09:44:44 (n/a) adler32:00000001 ONLINE
 
test24 file 0 2011-03-04 09:45:07 (n/a) adler32:00000001 ONLINE
 
ronstestfile file 4 2010-11-23 17:46:13 (n/a) adler32:03cd014b ONLINE
 
ronstestfile3 file 4 2010-11-23 17:49:07 (n/a) adler32:03cd014b ONLINE
 
testfile-put-1296854868-6468a2d5df07.txt file 20 2011-02-04 22:28:47 (n/a) adler32:1a400272 ONLINE
 
</pre>
 
 
 
Metadatainformation on a specific file can be listed by specifying the '''-m''' or '''--metadata''' option. In the following example the metadata information of the '''test23''' file is shown:
 
 
 
<pre>
 
[jonas@localhost swestore]$ arcls --metadata srm://srm.swegrid.se/ops/test23
 
/ops/test23
 
accessperm:rw-r-----
 
checksum:adler32:00000001
 
ctime:2011-03-04 09:44:44
 
filestoragetype:PERMANENT
 
group:25001
 
latency:ONLINE
 
lifetimeassigned:PT1S
 
lifetimeleft:PT1S
 
mtime:2011-03-04 09:44:45
 
owner:25001
 
path:/ops/test23
 
size:0
 
spacetokens:
 
type:file
 
</pre>
 
 
 
= Creating directories =
 
 
 
There are no command line tool yet for creating directories. This command will probably be added in a upcoming release. In the meantime the following procedure can be used:
 
 
 
<pre>
 
[jonas@localhost swestore]$ mkdir mydir
 
[jonas@localhost swestore]$ touch mydir/dummyfile
 
[jonas@localhost swestore]$ arccp ./mydir/ srm://srm.swegrid.se/ops/mydir/
 
[jonas@localhost swestore]$ arcls srm://srm.swegrid.se/ops/mydir
 
dummyfile
 
</pre>
 
 
 
The dummmy file can be removed using the arcrm command described in the following sections.
 
 
 
= Removing files =
 
 
 
<pre>[jonas@localhost swestore]$ arcrm srm://srm.swegrid.se/ops/mydir/dummyfile</pre>
 
 
 
= Removing directories =
 
 
 
To remove directories they have to be empty. To indicate a directory the URL should end with a '''/'''.
 
 
 
<pre>[jonas@localhost swestore]$ arcrm srm://srm.swegrid.se/ops/mydir/</pre>
 

Latest revision as of 09:55, 8 February 2023