AHPCC clusters are available on several ssh
login hosts and from a web portal portal_login. The
ssh
common account text login hosts are pinnacle.uark.edu
, trestles.uark.edu
, and razor.uark.edu
. The CSCE cluster has an ssh
login host karpinski.uark.edu
with separate accounts and files and a Slurm scheduler.
Each cluster login host presents the same view of your files but has a different job scheduler and job queue (pinnacle
Slurm, trestles
Torque, razor
Torque). The 'trestles and
razor login hosts are deprecated and will be shut down as those clusters are integrated into the
pinnacle Slurm scheduler. The
pinnacle login host auto-assigns each login to one of 14 virtual machines, so your host terminal session will be labeled with the VM name
pinnacle-l1 through
pinnacle-l14'
An ssh
client is needed on your workstation to access the ssh
login hosts. The web portal
portal_login has an ssh
text emulator in-browser if you don't have an ssh
client available. An
ssh
client (and file-transfer scp,sftp
) are usually installed by default on linux and Mac workstations. On Windows 7 or 10 we recommend the stand-alone program PuTTY . With the PuTTY ssh client putty.exe
you will probably also need a file-transfer program from the same site, either pscp.exe
or psftp.exe
. Windows 10 can also install a near-complete clone of Linux including ssh,scp,sftp
called WSL . If you want an explorer-like GUI for ssh and file transfer, there is a free installable download
sshwinsecureshell-3.2.9.exe . If workstation disk space is a consideration, PuTTY is small, sshwinsecureshell medium, WSL large.
Login to ssh
hosts using your UArk email name (without @uark.edu) and authenticate with your UArk password. If you don't have a Uark account, we will send you alternate login instructions. In PuTTY and sshwinsecureshell you may need to set the host port on the configuration screen to 22, not 23.
AHPCC doesn't know and can't change UArk passwords, use https://account.uark.edu or ITS support. If you fail UArk authentication three times, you won't be able to login for half an hour. If an AHPCC login host fails to answer or fails to login, contact hpc-support@listserv.uark.edu . It is helpful to first try the other two login hosts and/or a protected ITS host such as https://account.uark.edu to help determine if it is a host, network, or account/password issue.