Avogadro
From C3P
(Difference between revisions)
| (14 intermediate revisions by one user not shown) | |||
| Line 12: | Line 12: | ||
== Access == | == Access == | ||
| − | * Linux and Mac OS users can login using a terminal | + | * Linux and Mac OS users can login using a terminal. Windows 10 users can use the PowerShell. |
| − | ssh | + | The first step si to open a tunnel: |
| + | |||
| + | ssh -L 2000:192.168.16.253:22 account@147.162.63.10 | ||
:where "account" is the user's account. | :where "account" is the user's account. | ||
| − | + | ||
| + | Then, in a different shell, login as: | ||
| + | |||
| + | ssh -p 2000 account@localhost | ||
| + | |||
| + | |||
| + | Through port 2000 users can also transfer files directly via the tunnel using the scp command. | ||
| + | |||
| + | |||
| + | == Troubleshootng == | ||
| + | |||
| + | In some Linux distributions, the first attempt to open the ssh tunnel may fail with the following message: | ||
| + | |||
| + | Unable to negotiate with 147.162.63.10 port 7000: no matching key exchange method found. Their offer: diffie-hellman-group1.sh1 | ||
| + | |||
| + | to solve such an issue, open (or create) the file | ||
| + | |||
| + | ~/.ssh/config | ||
| + | |||
| + | and then add to the file the following lines | ||
| + | |||
| + | Host 147.162.63.10 | ||
| + | KexAlgorithms +diffie-hellman-group1-sha1 | ||
| + | |||
| + | Please, counsult http://www.openssh.com/legacy.html for more information about this issue. | ||
== Queues == | == Queues == | ||
| − | The queue manager is [[ | + | The queue manager is [[Support|SLURM]] and the following queues are available: |
| − | * '''avogadro''': max nodes 40, max walltime 2 weeks | + | * '''avogadro''': max nodes 40, max walltime 336:00:00 (2 weeks) |
| − | + | ||
| − | == Example | + | == Example SLURM file == |
| − | A typical | + | A typical SLURM script will be as follow (see the [[Support]] page for more help): |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --job-name=''name'' |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --ntasks=''1'' |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --cpus-per-task=''1'' |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --partition=avogadro |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --account=avogadro |
| − | <nowiki>#</nowiki> | + | <nowiki>#</nowiki>SBATCH --time=''100:00:00'' |
''commands to execute'' | ''commands to execute'' | ||
where the parts in ''italic'' should be changed as appropriate. | where the parts in ''italic'' should be changed as appropriate. | ||
Latest revision as of 14:48, 5 February 2026
Contents |
Description
Avogadro is the largest, but oldest, cluster in the C3P facility. It is equipped with the following hardware/software:
- 71 nodes with 2 x CPU Intel Woodcrest Dual Core 2.6 GHz (4 cores), 2 x HD SAS 72 GB, 8 GB RAM, Infiniband, OS Red Hat Enterprise Linux WS release 4
- 9 nodes with 2 x CPU Intel Woodcrest Quad Core 2.6 GHz (8 cores), 2 x HD SAS 72 GB, 16 GB RAM, Infiniband, OS Red Hat Enterprise Linux WS release 4
for a total of 80 nodes, 356 cores.
Access
- Linux and Mac OS users can login using a terminal. Windows 10 users can use the PowerShell.
The first step si to open a tunnel:
ssh -L 2000:192.168.16.253:22 account@147.162.63.10
- where "account" is the user's account.
Then, in a different shell, login as:
ssh -p 2000 account@localhost
Through port 2000 users can also transfer files directly via the tunnel using the scp command.
Troubleshootng
In some Linux distributions, the first attempt to open the ssh tunnel may fail with the following message:
Unable to negotiate with 147.162.63.10 port 7000: no matching key exchange method found. Their offer: diffie-hellman-group1.sh1
to solve such an issue, open (or create) the file
~/.ssh/config
and then add to the file the following lines
Host 147.162.63.10
KexAlgorithms +diffie-hellman-group1-sha1
Please, counsult http://www.openssh.com/legacy.html for more information about this issue.
Queues
The queue manager is SLURM and the following queues are available:
- avogadro: max nodes 40, max walltime 336:00:00 (2 weeks)
Example SLURM file
A typical SLURM script will be as follow (see the Support page for more help):
#SBATCH --job-name=name #SBATCH --ntasks=1 #SBATCH --cpus-per-task=1 #SBATCH --partition=avogadro #SBATCH --account=avogadro #SBATCH --time=100:00:00 commands to execute
where the parts in italic should be changed as appropriate.
