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disk:scratcharea [2009/08/18 16:39]
marina
disk:scratcharea [2023/05/19 11:36] (current)
zanello
Line 1: Line 1:
-====== I need to use the local scratch area, may I? How? Is it backupped? ====== +====== I need to use the local scratch area, may I? How? Is it backed up? ====== 
-You can write your data on local disk (** /scratch ** each linux workstation should have one) ).  +Generally each linux workstation should have a local disk area called " ​**/​scratch** ​" \\ 
-First you have to create a subdirectory in the **/scratch/** directory using the following command from a Linux shell:\\ +You can write your data here.\\ 
-**mkdir /scratch/yourusername ​      ​** ​  \\  +Put your files in /​scratch///​yourusername//​ directory and NOT in /scratch. Therefore, firstly ​you have to create a subdirectory in the /scratch directory using the following command from a linux shell:\\ 
-Put your files in **/scratch/​yourusername ​**directory,​ **not** in **/scratch**\\+**mkdir /​scratch///​yourusername //      ​**   ​\\ 
  
 <note i> <note i>
-**Do not put important files in scratch areas**, because if the local disk is damaged, we will not be able to recover its content+**Do not put important files in scratch areas**, because if the local disk is damaged, we will not be able to recover its contents.\\ 
-  ​Please note: **local directories** (/scratch /data etc.__**are never saved**__ ("backupped")!!+**Local directories (for example: ///scratch /data /tmp//) are never saved** (" ​backed up ")!!
 </​note>​ </​note>​
  
- +**For I/O intensive applications** (i.e. huge data on input/​output files), **you are strongly suggested ​to use the local disk of the workstation** where your executable is running and NOT your home directorySince the latter is accessed by the workstation through the network, the reading and writing procedure could slow down terribly and lower the performance of your application.\\
-You **can not** access ​to the local scratch areas from outside SISSA through shannon.sissa.it\\+
 \\ \\
 +----
  
-__**For I/O intensive applications**__ (i.e. huge data on input/​output files), you are strongly suggested to **use the local disk of the machine** where your executable is running and **not your home directory**. Since the latter is accessed by the machine through the network, the reading and writing procedure could slow down terribly and make the performance of your application worse.\\ 
-\\ 
 {{ :​disk:​vpn4.jpg?​270x150|vpnimage}} {{ :​disk:​vpn4.jpg?​270x150|vpnimage}}
-<color green>Please note, there is a NEWS</color> ​ LOL  ​\\+Please note, there is a NEWS. From the external network you can reach your linux workstation and so reach its /scratch area using the VPN connection.\\ 
 +To use the VPN connection, you should install [[services:​network:​vpnclient|the VPN client]] on your laptop, so 
 +please read the information on [[services:​network:​vpnclient|Cisco VPN client installation]] page. 
 + 
 + 
  
-From the external network you can reach your workstation and so reach its /scratch using the VPN connection.<​color brown> Due to security reasons, pages about vpn infos are readable inside the SISSA network only.</​color>​ \\ 
- To use the VPN connection, ​ 
-you have to:\\ 
-  * install __[[services:​network:​internal:​vpnclient|the VPN client]]__ on your laptop; 
-  * ask helpdesk the vpn user group password. Due to security reasons passwords are never sent by e-mail, you can obtain the vpn user group password by phone at __[[services:​helpdesk_description|helpdesk service]]__ or at helpdesk room; \\ 
-  * ask helpdesk to enable your workstation to accept the vpn connections.