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institute_lorentz:gnulinux_workstations [2017/03/07 08:17] – [Access to other workstation disks] lenocil | institute_lorentz:gnulinux_workstations [2022/11/08 08:34] (current) – [Data storage disk] lenocil | ||
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====== GNU/Linux Workstations ====== | ====== GNU/Linux Workstations ====== | ||
- | The standard Lorentz Institute workstation runs the GNU/Linux operating system | + | The standard Lorentz Institute workstation runs the [[https:// |
- | are configured | + | are configured |
- | You are allowed to install and/or build packages locally (directories to which you have access), but for system-wide installations you must file a request through our [[https:// | + | You are allowed to install and/or build packages locally (directories to which you have writing |
- | Although the workstations might differ in their hardware specifications, | + | We perform upgrades of the operating system of all workstations once a year usually starting in December. This is crucial for both security and latest software availability. |
- | you can access | + | |
+ | Although the workstations might differ in their hardware specifications, | ||
+ | you can access | ||
not accessible, such as in the event of a network disruption. | not accessible, such as in the event of a network disruption. | ||
- | ===== The home disk ===== | + | ===== Home disk ===== |
- | The home disk is `automounted' | + | |
- | < | + | |
- | $ df /home | + | |
- | Filesystem | + | |
- | home:/ | + | |
- | </ | + | |
- | Each user has an allocated quota on the home disk depending on their role within the Lorentz Institute. The standard quota is 4GB, nonetheless it is possible to request extra space. To check your quota settings type | + | |
- | < | + | |
- | $ quota -s | + | |
- | Disk quotas for user xxxxxx (uid 999x99): | + | |
- | | + | |
- | home:/ | + | |
- | | + | |
- | </ | + | |
- | TIP: Regularly check that you are below your assigned quota. Your workstation will stop working correctly if softwares cannot write temporary files in your home folder any more. | + | |
- | To compile a list of the ten largest files in a directory execute | + | ^Mount Point^ User Space^ Redundancy^Notes^ |
- | < | + | |/home| /home/<username>| RAID, 12:00 PM Daily Snapshots with 7 day expiration |
- | du -h /home/ | + | |
- | </code> | + | |
- | Then clean up responsibly. | + | |
- | ===== Local disks ===== | + | |
- | Each workstation could have one or more local hard disks among which one is used to host the operating system files. | + | |
- | The remaining space can be used to store relatively large files and will be accessible through the | + | |
- | mount points | + | |
- | <code> | + | |
- | $ df / | + | |
- | Filesystem | + | |
- | / | + | |
- | / | + | |
- | </ | + | |
- | Usually /data2 is configured as the mount point of a RAID[1|5] stack, meaning that data in it have a certain level of redundancy which can protect against disk failures. Note however, that storing all of your data on /data2 will not prevent loss if all disks in the array configuration `die' and/ | + | |
- | To check if a RAID configuration is used on your workstation type | + | Each user has an **__allocated quota__** |
- | < | + | |
- | $ cat / | + | |
- | Personalities : | + | |
- | unused devices: < | + | |
- | </ | + | |
- | In the example above there are no disks arranged in a RAID. | + | |
- | ===== The shell interpreter ===== | + | |
- | The Lorentz workstations come with a set of pre-installed shell interpreters. Your login shell can be chosen upon registration of your Lorentz account (HL 409b). Alternatively, it is possible to use a different | + | |
- | shell interpreter at any time by just invoking | + | |
- | < | + | |
- | csh | + | |
- | </ | + | |
- | ===== Access to other workstation disks ===== | + | |
- | Partitions named data// | + | |
- | <code> | + | |
- | / | + | |
- | </ | + | |
- | Note that in the example above < | + | |
- | TIP: The `mounting' | + | |
- | ===== Compilers and libraries ===== | + | |
- | A variety of compilers and libraries are available on your workstation. Please refer to the following manual [[linux: | + | |
- | Here we only give a summary of useful commands. | + | We advise you do not store large files in your home directory. |
- | < | + | |
- | # shows which environment modules are available | + | |
- | module avail | + | |
- | # load module | + | |
- | module load < | + | |
- | # unload module | + | |
- | module unload < | + | |
- | </ | + | |
- | NOTE: If [[linux: | + | |
+ | |||
+ | |||
+ | ==== Home disk data availability ==== | ||
+ | |||
+ | The Lorentz Institute home directories are hosted on a iSCSI array of disks arranged in a RAID | ||
+ | configuration. Automatic snapshots (a sort of incremental backup) of the whole home disk are performed __everyday at around 12:00 PM__. Each snapshot has a 7-day expiration and as such the total number of snapshots stored on our system at any time is __7__. | ||
+ | ===== Data disks ===== | ||
+ | Each workstation could have one or more local disks to offer large-data storage. The data disks of one workstation are also accessible from any other workstation | ||
+ | |||
+ | ^Mount Point^ User Space^ Redundancy^Notes^ | ||
+ | |/ | ||
+ | |/ | ||
+ | |||
+ | In most cases, **but not always**, /data2 is configured as the mount point of a RAID[1|5] stack, meaning that data in it have a certain level of redundancy which can protect against disk failures. Note however, that storing all data on /data2 in RAID configuration will still not prevent data loss if all disks in the array `die', | ||
+ | |||
+ | To check if any of your workstation' | ||
+ | |||
+ | Note that in the table above < | ||
+ | ===== Data storage disk ===== | ||
+ | |||
+ | Our data-storage disk can be accessed according to the following schema | ||
+ | |||
+ | ^Mount Point^ Total Size ^ Redundancy ^ Notes ^ | ||
+ | |/ | ||
+ | |[[institute_lorentz: | ||
+ | |||
+ | If you work on [[institute_lorentz: | ||
+ | ===== Shell interpreters ===== | ||
+ | The Lorentz Institute workstations come with a set of pre-installed shell interpreters. Your login shell can be chosen upon registration of your Lorentz account (HL 409b) otherwise it will default to '' | ||
+ | shell interpreter at any time by just invoking | ||
+ | |||
+ | If you want to change your default interpreter use '' | ||
+ | |||
+ | ===== Available software ===== | ||
+ | A variety of softwares are available on your workstation. Some software is installed locally on your workstation others are provided | ||
+ | remotely in the form of //modules// from our software disk either via the [[linux: | ||
+ | |||
+ | While locally installed softwares can be launched directly because already loaded in your environment, | ||
+ | For more information consult | ||
+ | |||
+ | :!: If [[linux: | ||
===== Help ===== | ===== Help ===== | ||
Should you need assistance operating your workstation, | Should you need assistance operating your workstation, | ||
- | Comments and suggestions to improve this guide are welcome. | + | |