-[Can HCC provide help and resources for my workshop?](#can-hcc-provide-help-and-resources-for-my-workshop)
-[Can HCC provide help and resources for my workshop?](#can-hcc-provide-help-and-resources-for-my-workshop)
-[Where can I get training on using HCC resources?](#where-can-i-get-training-on-using-hcc-resources)
-[Where can I get training on using HCC resources?](#where-can-i-get-training-on-using-hcc-resources)
-[My job is submitted to the highmem partition and is pending with QOSMinMemory reason. What does this mean?](#my-job-is-submitted-to-the-highmem-partition-and-is-pending-with-qosminmemory-reason-what-does-this-mean)
-[My job is submitted to the highmem partition and is pending with QOSMinMemory reason. What does this mean?](#my-job-is-submitted-to-the-highmem-partition-and-is-pending-with-qosminmemory-reason-what-does-this-mean)
-[I used Globus to copy my data across HCC file systems. How can I check that all data was successfully transferred and the data checksums match?](#i-used-globus-to-copy-my-data-across-hcc-file-systems-how-can-i-check-that-all-data-was-successfully-transferred-and-the-data-checksums-match)
The number of nodes with high memory is limited, so please only request high amounts of memory if the job really needs it. Otherwise, you may encounter longer waiting times, lower submission priority and underutilized resources.
The number of nodes with high memory is limited, so please only request high amounts of memory if the job really needs it. Otherwise, you may encounter longer waiting times, lower submission priority and underutilized resources.
#### I used Globus to copy my data across HCC file systems. How can I check that all data was successfully transferred and the data checksums match?
Globus automatic file integrity verification using checksums is turned off for HCC-specific Globus collections/endpoints.
By performing automatic file integrity verification using checksums via Globus all the source and destination files are read again and compared, and this adds significant I/O load on the HCC file-systems.
All HCC-specific file-systems have already built-in integrity checksums, thus additional verification is not needed.
If the status of your Globus transfer is `SUCCEEDED`, then the checksums of the source and destination files should match.
If you would still like to compare the checksums of the transferred files regardless of the Globus transfer status, there are two separate ways how you can achieve this:
- Start another Globus transfer and select _both_ **"sync - only transfer new or changed files"** and **"checksum is different"** under _"Transfer & Timer Options"_ under the _File Manager_ Globus tab.
- Run `rsync` with the `--checksum` option using an [Interactive Session](https://hcc.unl.edu/docs/submitting_jobs/creating_an_interactive_job/) or [SLURM job](https://hcc.unl.edu/docs/submitting_jobs/).
