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disk:disksusage [2020/02/11 11:15] urgias [Your main directory (home) on the SISSA main cluster:] |
disk:disksusage [2023/03/08 17:03] zanello |
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| ====== SISSA's Computing FAQ: Space disks usage====== | ====== SISSA's Computing FAQ: Space disks usage====== | ||
| - | **<color teal>This page is reserved for the users who have an account on the SISSA main cluster and use:</color>**\\ | + | **<color teal>This page is reserved to the users who have an account on SISSA and use:</color>**\\ |
| - | * **<color teal>a linux workstations at Santorio </color> **or | + | * **<color teal>a linux workstation at Santorio </color> **or |
| - | *** <color teal>a terminal connection</color> **(for example using the ssh command)** <color teal> on the access server </color>//<color teal> ssh.sissa.it </color>//** .\\ | + | * **<color teal>an ssh connection</color> on a linux workstation or ssh.sissa.it**.\\ |
| + | * About the HPC cluster please refer to the [[services:computing:hpc|High Performance Computing: Ulysses v2]] page. | ||
| \\ | \\ | ||
| - | ===== YOUR MAIN DIRECTORY (home) ===== | + | ===== HOME directory ===== |
| - | ==== Your main directory (home) on the SISSA main cluster: ==== | + | ==== Your HOME directory in SISSA: ==== |
| - | After login (when your username and password are accepted) you have access to your main directory (home): \\ | + | After login (when your username and password are accepted) you have access to your HOME directory: \\ |
| - | **/u///your_surname_initial/your_username//** For example:// /u/a/atena // \\ | + | **/u///username_initial/username//** (e.g., ///u/a/atena//) \\ |
| - | If you change your working directory, you can return to your main directory using the **cd** command without any additional option or name.\\ | + | |
| - | You can use the **pwd** command to view which is your main directory (the **pwd** command prints the path of your working directory, the directory where you are currently in).\\ | + | |
| + | If you change your working directory, you can return to your HOME directory using the **cd** command without any additional option or name.\\ | ||
| + | You can use the **pwd** command to view which is your HOME directory (the **pwd** command prints the path of your working directory, the directory where you are currently in).\\ | ||
| - | == Your main directory: == | + | |
| + | == Your HOME directory: == | ||
| * is regularly saved ( " backed up " ); | * is regularly saved ( " backed up " ); | ||
| - | \\ | ||
| * **has a space limit**: each user has 50GB of disk space; | * **has a space limit**: each user has 50GB of disk space; | ||
| + | * is reachable from outside SISSA using the **ssh** command (a Secure Shell remote terminal connection) on **ssh.sissa.it** (e.g.: ''ssh //username//@ssh.sissa.it''); | ||
| + | * is also reachable from outside SISSA using a [[services:network:internal:vpnclient|VPN connection]] on your workstation. Your workstation name is: <hostname>.<area_name>.sissa.it (e.g.: host.phys.sissa.it or host.maths.sissa.it); | ||
| + | * is reachable from inside SISSA using a CIFS/SAMBA connection: **\\nas-users.sissa.it\USERNAME** or **[[smb://]]nas-users.sissa.it///USERNAME//** | ||
| \\ | \\ | ||
| - | * is reachable from outside SISSA using the **ssh** command (a Secure Shell remote terminal connection) on **//ssh.sissa.it//** (for example: // ssh //ssh.sissa.it//// ); | ||
| - | \\ | ||
| - | |||
| - | {{ :disk:vpn4.jpg?270x150|vpnimage}}\\ | ||
| - | |||
| - | * is also reachable from outside SISSA using a [[services:network:vpnclient|VPN connection]] on your workstation. | ||
| - | |||
| ---- | ---- | ||
| - | Using the **//SFTP service//**, the path of your main directory (home) is a bit different. For more information, please read the section on [[on-line_resources:faq:server-ssh-sftp#SFTP access: sftp.sissa.it|SFTP access: sftp.sissa.it]] of the [[on-line_resources:faq:server-ssh-sftp|Common Access server]]. | + | Using the **//SFTP service//**, the path of your HOME directory is a bit different. For more information, please read the section on [[on-line_resources:faq:server-ssh-sftp#SFTP access: sftp.sissa.it|SFTP access: sftp.sissa.it]] of the [[on-line_resources:faq:server-ssh-sftp|Common Access server]]. |
| - | ---- | ||
| - | ---- | ||
| - | |||
| - | ==== Quota ==== | ||
| - | Using the **quota** command you can check your space usage on your main directory: | ||
| - | |||
| - | For example: | ||
| - | |||
| - | $ quota | ||
| - | Disk quotas for user yourusername (uid yourUIDnumber): | ||
| - | Filesystem space quota limit grace files quota limit grace | ||
| - | /u 1547M 50176M 51200M 4538 4295m 4295m | ||
| - | |||
| - | - The //first number// of the last line is the space which you are using. | ||
| - | |||
| - | == Soft limit == | ||
| - | - The //second number// (in the example //50176//) is your soft limit. If your usage exceeds this limit, you will receive an e-mail notification. You have 7 days to reduce your disk space occupation back under the soft limit. | ||
| - | |||
| - | If you do not bring your usage back within the soft limit within 7 days: | ||
| - | |||
| - | * you will not be able to create or save files... | ||
| - | * you will not be able to login in graphical mode or ... | ||
| - | * your graphic settings could be damaged and could appear different, so you will not be able to run programs and command activated through the top bar (panel). | ||
| - | |||
| - | == Hard limit == | ||
| - | - The //third number// (in the example //51200//) is your hard MAXIMUM limit, if you overtake this limit: | ||
| - | |||
| - | * you cannot create or save files... | ||
| - | * you cannot login in graphical mode or ... | ||
| - | * your graphic settings could be damaged and could appear different, so you will not be able to run programs and command activated through the top bar (panel). | ||
| - | |||
| - | |||
| - | When you are over the quota set by the hard limit - message: **Disk quota exceeded** - you have to clean your main directory from unneeded files. | ||
| - | To avoid this situation, we suggest to regularly compress the files which you are not using and to remove any unneeded files. Be careful, " Haste makes waste ". | ||
| ==== Backup (snapshot) ==== | ==== Backup (snapshot) ==== | ||
| - | Your home directory is automatically backed up, and all recent backups are now freely accessible for reading. | + | Your HOME directory is automatically backed up, and all recent backups are now freely accessible for reading. |
| To look for a previous version of a file, simply go via terminal or by forcing the location to the file manager to the subdirectory .snapshot. | To look for a previous version of a file, simply go via terminal or by forcing the location to the file manager to the subdirectory .snapshot. | ||
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| Usually you can find 6 backups at different hours for the last day, one week of daily backups, and some older backups up to a couple of weeks. Older backups are available via a special helpdesk request and can take some time to get your data. | Usually you can find 6 backups at different hours for the last day, one week of daily backups, and some older backups up to a couple of weeks. Older backups are available via a special helpdesk request and can take some time to get your data. | ||
| - | On a windows client, all you need is to right click on the file, select **Properties** and then the **Previous versions** tab. From there you can restore the file to its original content. | + | On a Windows client, all you need is to right click on the file, select **Properties** and then the **Previous versions** tab. From there you can restore the file to its original content. |
| ---- | ---- | ||
| ---- | ---- | ||
| - | ===== Useful COMMANDS to CLEAN YOUR AREA ===== | + | ===== Useful commands to CLEAN your area ===== |
| ==== Check files and directory sizes ==== | ==== Check files and directory sizes ==== | ||
| - | To see how many blocks are used by your directories and files (start first from your main directory): | + | To see how many blocks are used by your directories and files (start first from your HOME directory): |
| * including only normal directories and files: **du -sk * ** | * including only normal directories and files: **du -sk * ** | ||
| * including also hidden directories and files: **du -sk .[a-z]* ** | * including also hidden directories and files: **du -sk .[a-z]* ** | ||
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| **cd //subdirectoryname//** \\ | **cd //subdirectoryname//** \\ | ||
| - | To return in you main directory use **cd **\\ | + | To return in you HOME directory use **cd **\\ |
| \\ | \\ | ||
| === Remove files === | === Remove files === | ||
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| To remove a file: **rm //filename//**\\ | To remove a file: **rm //filename//**\\ | ||
| To remove files which start with //omega//:// ls omega//<html>   </html> then, ONLY if you are sure: //rm omega*// \\ | To remove files which start with //omega//:// ls omega//<html>   </html> then, ONLY if you are sure: //rm omega*// \\ | ||
| - | If you are very sure about the files you wish to remove, you can use " **-f** " option to remove all files in a directory without prompting confirmation before removing any files. For example: //rm -f omega*// | + | If you are very sure about the files you wish to remove, you can use " **-f** " option to remove all files in a directory without prompting confirmation before removing any files. E.g.: //rm -f omega*// |
| ---- | ---- | ||
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| - | ===== SCRATCH AREAS ===== | + | ===== SCRATCH areas ===== |