https://www.nas.nasa.gov/hecc/support/kb/134/ https://www.nas.nasa.gov/hecc/support/kb/nas-lustre-filesystems_225.html All NAS systems share several filesystems intended to provide working space for compute jobs. These filesystems, called "nobackup" (/nobackuppX), provide more than 90 petabytes (PB) of disk space and serve many thousands of cores. The /nobackup... Storing Files & Data/Writing Data to Filesystems Tue, 03 Nov 2026 11:15:02 -0800 https://www.nas.nasa.gov/hecc/support/kb/quota-policy-on-disk-space-and-files_156.html Filesystems on NAS systems have the following types of quotas: Limits on the total disk space occupied by your files Limits on the number of files (represented by inodes) you can store, regardless of size. For quota purposes, directories count... Storing Files & Data/Writing Data to Filesystems Tue, 01 Sep 2026 10:56:28 -0700 https://www.nas.nasa.gov/hecc/support/kb/local-file-transfer-commands_141.html For large file transfers within the NAS enclave, use the commands shiftc, mcp, or cxfscp. The slower cp command also can be used. The following file transfer commands can be used when both the source and destination locations are accessible on... Storing Files & Data Wed, 25 Mar 2026 09:50:43 -0700 https://www.nas.nasa.gov/hecc/support/kb/streamlining-pbs-job-file-transfers-to-lou_125.html Some users prefer to streamline the storage of files (created during a job run) to Lou, within a PBS job. Because direct access to the Lou storage nodes from the NAS compute nodes has been disabled, all file transfers to Lou within a PBS job must... Storing Files & Data/Optimizing/Troubleshooting Wed, 31 Dec 2025 13:49:45 -0800 https://www.nas.nasa.gov/hecc/support/kb/the-lou-mass-storage-system_371.html For safe, long-term data storage, transfer your files to the Lou mass storage system, which allows you to retrieve your stored files quickly and securely whenever you need them. The Lou mass storage system is an Intel Xeon Gold 6154... Storing Files & Data/Backing Up Data in the Lou Mass Storage System Thu, 04 Dec 2025 09:54:55 -0800 https://www.nas.nasa.gov/hecc/support/kb/increasing-file-transfer-rates_292.html If you are moving large files, use the shiftc command instead of cp or scp. An online NAS service can help diagnose your remote network connection issues, and our network experts can work with your specific file transfer problems. For fastest... Storing Files & Data/Optimizing/Troubleshooting Wed, 03 Dec 2025 14:50:15 -0800 https://www.nas.nasa.gov/hecc/support/kb/using-giveto-to-copy-files-andor-directories-to-another-user_280.html NAS's in-house developed giveto script is built on the use of Access Control Lists (ACLs). It allows one user (the giver) to copy files and/or directories to a /nobackup directory of another user (the recipient). giveto is installed under... Storing Files & Data/Writing Data to Filesystems Wed, 03 Dec 2025 12:36:38 -0800 https://www.nas.nasa.gov/hecc/support/kb/backing-up-your-data_245.html Storing Data in the Home Filesystems for NAS Compute Resources All data stored in your home filesystem of any NAS compute system are automatically backed up daily under script control. If you lose important data from a home filesystem and need... Storing Files & Data/Backing Up Data in the Lou Mass Storage System Wed, 03 Dec 2025 11:57:37 -0800 https://www.nas.nasa.gov/hecc/support/kb/lustre-best-practices_226.html At NAS, Lustre (/nobackup) filesystems are shared among many users and many application processes, which can cause contention for various Lustre resources. This article explains how Lustre I/O works, and provides best practices for improving... Storing Files & Data/Writing Data to Filesystems Wed, 03 Dec 2025 11:07:27 -0800 https://www.nas.nasa.gov/hecc/support/kb/lustre-basics_224.html A Lustre filesystem is a highly scalable, high-performance shared filesystem for Linux clusters that is managed with Lustre software. It can support many thousands of client nodes, petabytes of storage, and hundreds of gigabytes per second of I/O... Storing Files & Data/Writing Data to Filesystems Wed, 03 Dec 2025 11:04:13 -0800 https://www.nas.nasa.gov/hecc/support/kb/file-transfers-tips_267.html The following quick and easy techniques may improve your performance rates when transferring files remotely to or from NAS. This can increase your transfer rates by 5x, compared to older methods such as 3des. Transfer files from the... Storing Files & Data/Optimizing/Troubleshooting Thu, 28 Apr 2022 10:53:42 -0700 https://www.nas.nasa.gov/hecc/support/kb/shift-transfer-tool-overview_300.html The NAS-developed Shift tool can copy files locally on NAS enclave hosts, transfer files between hosts inside the NAS enclave, and transfer files between the NAS enclave and remote hosts. You can also use Shift to check the status of transfers at... Storing Files & Data Mon, 20 Jul 2020 17:17:31 -0700 https://www.nas.nasa.gov/hecc/support/kb/verifying-files-transferred-to-the-lou-mass-storage-system_246.html It is a good practice to confirm whether files are copied correctly to the Lou mass storage system after you transfer them. TIP: The easiest way to verify the integrity of your file contents is to use the NAS-developed Shift tool to transfer the... Storing Files & Data/Backing Up Data in the Lou Mass Storage System Fri, 15 Mar 2019 12:49:39 -0700 https://www.nas.nasa.gov/hecc/support/kb/using-access-control-lists-for-file-sharing_279.html A common way to share files and/or directories with group members or others is to use the chmod command to change the permissions. However, chmod has limitations, so you may sometimes choose to use Access Control Lists (ACLs). When you issue the... Storing Files & Data/Writing Data to Filesystems Fri, 24 Jul 2015 12:34:22 -0700