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en:services:application_services:high_performance_computing:transfer_data [2019/01/10 11:20]
tehlers [Getting Access to Scratch from Outside the GÖNET (ssh proxy method)]
en:services:application_services:high_performance_computing:transfer_data [2020/01/29 16:29] (current)
mboden [Transfering Large Quantaties of Data]
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 For the filesystem /scratch2 we don't have a dedicated transfernode. For this filesystem you need to use the frontend ''​gwdu103.gwdg.de''​ (instead of ''​transfer-scc.gwdg.de''​). For the filesystem /scratch2 we don't have a dedicated transfernode. For this filesystem you need to use the frontend ''​gwdu103.gwdg.de''​ (instead of ''​transfer-scc.gwdg.de''​).
 +
 +=== Transfering Large Quantaties of Data ===
 +
 +If you need to transfer large quantities of data to our system, it may be advisable to copy directly to /scratch to increase the transfer rate, since the write-performance of our home file systems can sometimes be the limiting factor. Transfering to /scratch directly will not have this limitation.
 =====  Within the GÖNET ​ ===== =====  Within the GÖNET ​ =====
  
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 **/​scratch** **/​scratch**
  
-using ssh (scp or rsync tunneled through ssh). Here is an example for copying data from your computer to scratch (please replace {SRC-DIR},​{DST-DIR} and {USERID}):+using ssh (scp or rsync tunneled through ssh). Here is an example for copying data from your computer to scratch (please replace ​''​{SRC-DIR}''​''​{DST-DIR}'' ​and ''​{USERID}''​):
 <​code>​ <​code>​
 scp -rp {SRC-DIR} {USERID}@transfer-scc.gwdg.de:/​scratch/​{USERID}/​{DST-DIR} scp -rp {SRC-DIR} {USERID}@transfer-scc.gwdg.de:/​scratch/​{USERID}/​{DST-DIR}
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 =====  Outside of the GÖNET (from the Internet) ​ ===== =====  Outside of the GÖNET (from the Internet) ​ =====
  
-If your computer is located //outside the GÖNET//, you can use the server ''​transfer-scc.gwdg.de''​ to copy data from and to:+If your computer is located //outside the GÖNET//, you can use the server ''​transfer.gwdg.de''​ to copy data from and to:
  
 **your Home directory** **your Home directory**
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 For security reasons this node is not located inside the SCC network and therefor only has your Home directory but not /scratch accessible. For security reasons this node is not located inside the SCC network and therefor only has your Home directory but not /scratch accessible.
 +
 +====  Getting Access to Scratch from Outside the GÖNET ​ via VPN (recommended) ====
 +
 +The easiest way to get access to /scratch is to use our [[en:​services:​network_services:​vpn:​start|VPN]]. After activating the VPN connection as described in the documentation and you will be inside the GÖNET and therefore be able to use transfer-scc.gwdg.de as described above.
  
 ====  Getting Access to Scratch from Outside the GÖNET ​ (ssh proxy method)==== ====  Getting Access to Scratch from Outside the GÖNET ​ (ssh proxy method)====
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 [[Kategorie:​ Scientific Computing]] [[Kategorie:​ Scientific Computing]]
 +
 +===== ownCloud =====
 +
 +You can directly transfer data from and to the GWDG ownCloud by the WebDAV client ''​cadaver''​. This program provides a command line interface to the ownCloud similar to command line FTP applications. Connect to the server with:
 +<​code>​
 +$ cadaver https://​owncloud.gwdg.de/​remote.php/​nonshib-webdav
 +Authentication required for ownCloud on server `owncloud.gwdg.de':​
 +Username: your-user-name
 +Password: ​
 +dav:/​remote.php/​nonshib-webdav/> ​
 +</​code>​
 +You can use the usual commands such as ''​cd'',​ ''​ls'',​ ''​cp'',​ etc. to navigate and copy/move files within you ownCloud. Uploading and downloading files can be done with ''​put''​ and ''​get''​ respectively (or ''​mput''​ and ''​mget''​ to transfer multiple files at once).
 +
 +To change your directory on the cluster itself and list files, use ''​lcd''​ and ''​lls''​ (think of it as local-cd and local-ls). After you are done, you can quit with ''​quit'',​ ''​exit''​ or with ''​CTRL-D''​. Here are a few examples:
 +<​code>​
 +dav:/​remote.php/​nonshib-webdav/>​ ls
 +[... contents of ownCloud ...]
 +dav:/​remote.php/​nonshib-webdav/>​ lls
 +exampledir ​ file1
 +dav:/​remote.php/​nonshib-webdav/>​ lpwd
 +Local directory: /​scratch/​mboden/​dav-example
 +dav:/​remote.php/​nonshib-webdav/>​ mkdir example
 +Creating `example':​ succeeded.
 +dav:/​remote.php/​nonshib-webdav/>​ cd example
 +dav:/​remote.php/​nonshib-webdav/​example/>​ ls
 +Listing collection `/​remote.php/​nonshib-webdav/​example/':​ collection is empty.
 +dav:/​remote.php/​nonshib-webdav/​example/>​ put file1
 +Uploading file1 to `/​remote.php/​nonshib-webdav/​example/​file1':​ succeeded.
 +dav:/​remote.php/​nonshib-webdav/​example/>​ put exampledir
 +Uploading exampledir to `/​remote.php/​nonshib-webdav/​example/​exampledir':​
 +Progress: [                              ]   0.0% of 1 bytes failed:
 +Failed reading request body file: Is a directory
 +</​code>​
 +Copying whole directories is not possible. You should create a tar or zip archive first and copy that.
 +<​code>​
 +dav:/​remote.php/​nonshib-webdav/>​ cd example ​
 +dav:/​remote.php/​nonshib-webdav/​example/>​ lls -la
 +total 1
 +drwx------ 2 mboden GWDG 0 Dec  9 10:17 .
 +drwxr-xr-x 5 mboden GWDG 4 Dec  9 10:17 ..
 +dav:/​remote.php/​nonshib-webdav/​example/>​ ls
 +Listing collection `/​remote.php/​nonshib-webdav/​example/':​ succeeded.
 +        file1                                  0  Dec  9 10:10
 +dav:/​remote.php/​nonshib-webdav/​example/>​ get file1
 +Downloading `/​remote.php/​nonshib-webdav/​example/​file1'​ to file1: [.] succeeded.
 +dav:/​remote.php/​nonshib-webdav/​example/>​ lls -la
 +total 1
 +drwx------ 2 mboden GWDG 0 Dec  9 10:19 .
 +drwxr-xr-x 5 mboden GWDG 4 Dec  9 10:17 ..
 +-rw------- 1 mboden GWDG 0 Dec  9 10:19 file1
 +</​code>​
 +
 +