Current limitations on OCTOPUS [Update: Oct. 2]

[Update: October 2, 2025]
The following issues have been resolved:
　2. Degraded communication performance due to interconnect link failure
　3. SQUID cannot access file system of OCTOPUS
We apologize for the inconvenience caused.

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During the trial operation, the following limitations exist on the OCTOPUS system. We are working toward resolving these limitations for the production operation. We will provide further updates as soon as there is progress.
 

1. Memory usage limit due to a BIOS bug

OCTOPUS has 768 GB of physical memory per node, of which up to 760 GB is typically available for user jobs.
However, it is currently limited to a maximum of 742 GB for jobs due to a bug in the BIOS.
Please note that if a job uses more than 742 GB, it will be terminated.
 

2. Degraded communication performance due to interconnect link failure [Resolved]

Some of the network ports on the interconnect switches are reporting link errors. Jobs can still be executed without issues, but the effective inter-node communication throughput is degraded by 10-20% from the designed performance.
 

3. SQUID cannot access file system of OCTOPUS [Resolved]

The file system of OCTOPUS is designed to be accessible from the front-end server of SQUID via the paths below:
　　/octfs/home
　　/octfs/work
However, these paths are currently unavailable on SQUID. For now, please use the following paths on OCTOPUS to access the files on SQUID:
　　/sqfs/home
　　/sqfs/work
 

4. File transfer via Web Browser (Nextcloud) is unavailable

Nextcloud is being tested internally and is currently not available to the public.
 

5. Provenance management feature is unavailable

The provenance management feature is being tested internally and is currently not available to the public.
 


Posted : October 02,2025