This version (2018/01/31 13:54) is a draft.Approvals: 0/1
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Agenda
Introduction to Working on the MUL Cluster
Login
General remarks
- User accounts and passwords are identical to your MUL account (???)
- Connections limited to MUL network or MUL VPN (???)
- Use a terminal program: xterm, putty, terminal, …
Login
Linux and OS X
ssh -X <username>@nsrv1.unileoben.ac.at ssh -X <username>@nsrv2.unileoben.ac.at
OS X
If, e.g., you have an US keyboard layout, you may have to include the following lines have in your <html><font color=#006e6f></html>.bashrc file<html></font></html> on the login node in order to be able to submit jobs:
export LC_CTYPE=en_US.UTF-8 export LC_ALL=en_US.UTF-8
Alternatively, you can change the same directly on your Mac in
<html><font color=#006e6f></html> Terminal ➠ Preferences ➠ Profiles ➠ Advanced ➠ International <html></font></html>
Uncheck the option “Set locale environment variables on startup” and restart the terminal.
Home directories
All home directories are located in /home which is mounted via NFS from a fileserver (f1)
- mounted via IB on login nodes and c1-[01-12],c2-[01-08]
- mounted via eth on all other nodes
- located on raid system of SSDs
- total capacity is 17T
- ZFS filesystem
Home directories
The directory structure is:
/home/<workgroup>/<username>
By default permission are set to 0027:
rwxr-x---
- Directories and files are writable by user,
- readable by group
- inaccessible by others.
The settings can be changed by the user who owns the directory.
Tranferring data
copy data to cluster:
[...]$ scp <filename> <username>@nserv1.unileoben.ac.at:~/
continuous backup of user data ➠ rsync
- reduces amount of data sent over the network
- “quick check” algorithm ➠ only changes sent
- rsync options: ➠
rsync -av- recursive, copies symlinks, preserves permissions, modification times, group, special files, owner
- Alternatively, data can be copied using, e.g., either <html><font color=#006e6f></html> ➠ FileZilla <html></font></html> or <html><font color=#006e6f></html> ➠ winscp <html></font></html>
Backup Policy: <html><font color=#006e6f></html> no backup of user data (???) ➠ backup is solely the responsibility of each user <html></font></html>