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[Users] NERSC Weekly Email, Week of January 4, 2021

Author: Rebecca Hartman-Baker <>
Date: 2021-01-04 18:50:58

# NERSC Weekly Email, Week of January 4, 2021 <a name="top"></a> # ## Contents ## - [Summary of Upcoming Events and Key Dates](#dates) ## [NERSC Status](#section1) ## - [Happy New Year from NERSC](#holwishes) - [NERSC Operations Continue, with Minimal Shelter-in-Place Impacts](#curtailment) ## [This Week's Events and Deadlines](#section2) ## - [Last Chance: Let NERSC Know How We're Doing via the NERSC User Survey!](#usersurvey) ## [Updates at NERSC ](#section3) ## - [Plan for the New Allocation Year, Beginning January 20, 2021](#newayplan) - [Resolution of cscratch1 Issues](#cscratch1) - [Large Memory Nodes on Cori and Spin Available to Users](#largemem) - [Cori Default Python Modules Changed at Last Maintenance](#pythonmodules) ## [Calls for Participation](#section4) ## ## [Upcoming Training Events ](#section5) ## ## [NERSC News ](#section6) ## - [No New "NERSC User News" Podcast this Week](#nopodcast) - [Come Work for NERSC!](#careers) - [Upcoming Outages](#outages) - [About this Email](#about) ## Summary of Upcoming Events and Key Dates <a name="dates"/></a> ## January 2021 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 *18* 19 *20* 21 22 23 18 Jan MLK Holiday [2] 20 Jan Cori Monthly Maint Window [3] 20 Jan AY 2021 Begins [4] 24 25 26 27 28 29 30 31 February 2021 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 *15* 16 *17* 18 19 20 15 Feb Presidents Day Holiday [5] 17 Feb Cori Monthly Maint Window [3] 21 22 23 24 25 26 27 28 March 2021 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2. **January 18, 2021**: Martin Luther King Jr. Holiday (No Consulting or Account Support) 3. **January 20 & February 17, 2021**: Cori Monthly Maintenance Window 4. **January 20, 2020**: [Allocation Year 2021 Begins](#newayplan) 5. **February 15, 2021**: Presidents Day Holiday (No Consulting or Account Support) 6. All times are **Pacific Time zone** - **Upcoming Planned Outage Dates** (see [Outages section](#outages) for more details) - No outages planned until Jan 20 Cori Maintenance - **Other Significant Dates** - **February 4-5, 2021**: [First International Symposium on Checkpointing for Supercomputing (SuperCheck21)](#ckpt) ([back to top](#top)) --- ## NERSC Status <a name="section1"/></a> ## ### Happy New Year from NERSC <a name="holwishes"/></a> Happy New Year from NERSC! We hope that this next year is even more productive. ### NERSC Operations Continue, with Minimal Shelter-in-Place Impacts <a name="curtailment"/></a> Alameda County, California, where NERSC is located, remains under a shelter-in-place order. NERSC continues to remain open while following site-specific protection plans. We remain in operation as before, with the majority of NERSC staff working remotely for the foreseeable future, and only staff essential to operations onsite. You can continue to expect regular online consulting and account support but no telephone support. Trainings will continue to be held online, or postponed if online is infeasible. Regular maintenances on the systems will continue to be performed while minimizing onsite staff presence, which could result in longer downtimes than would occur under normal circumstances. Because onsite staffing is so minimal, we request that you continue to refrain from calling NERSC Operations except to report urgent system issues. For **current NERSC systems status**, please see the online [MOTD]( and [current known issues]( webpages. ([back to top](#top)) --- ## This Week's Events and Deadlines <a name="section2"/></a> ## ### Last Chance: Let NERSC Know How We're Doing via the NERSC User Survey! <a name="usersurvey"/></a> NERSC has once again retained an external company, National Business Research Institute, to perform our Allocation Year 2020 survey. A personalized invitation to take the survey was emailed to each user on Thursday, November 19, and reminders have been sent weekly. **Please complete your survey before it closes tomorrow.** We welcome your feedback on how we're doing, and what we can do better to serve you. ([back to top](#top)) --- ## Updates at NERSC <a name="section3"/></a> ## ### Plan for the New Allocation Year, Beginning January 20, 2021 <a name="newayplan"/></a> The new NERSC allocation year (AY) begins on January 20, 2021. Any new and continuing projects received notice in early December. Additional information was sent before the holidays to PIs and PI proxies of continuing projects on how to update your project's continuing user list and authorize the use of premium. There will be a few changes for AY 2021 centered around access and charging for the "premium" QOS. PIs will now be able to authorize only select users to charge to premium. In addition, high premium utilization (above 20% of a project's allocation) will be charged a higher premium rate (4x vs 2x the "regular" QOS cost). Much will remain the same, however. The base charge rates will not change for 2021, and the software default versions will not change from 2020 defaults. We anticipate that **software defaults may change later in the year** when we must perform an upgrade to Cori's operating system. The Perlmutter machine will come online in AY 2021. Users will not be charged for any utilization on Perlmutter in AY 2021. Perlmutter charging will begin in AY 2022. For more details about the AY transition, please see the [AY Transition Webpage]( ### Resolution of cscratch1 Issues <a name="cscratch1"/></a> During the NERSC facility power upgrade last month, fixes were deployed for the bugs that led to the cscratch1 outage in September and October. We are confident that the problem is now fully resolved. We still recommend setting Lustre file striping with consideration for the file size, and using the NERSC-provided helper scripts -- please see <> for details. ### Large Memory Nodes on Cori and Spin Available to Users <a name="largemem"/></a> The new [Cori Large Memory]( ("cmem") system, consisting of 20 nodes each with 2 TB memory and two 16-core 3.0 GHz AMD EPYC 7302 (Rome) processors and 3 TB local SSD disk, is available for use. Prospective users must apply for access via the [cmem access request form]( The nodes are available to all NERSC users upon approval. Projects performing COVID-19 related research or with strong scientific use cases that have a need for the nodes' architectural characteristics will be prioritized. Usage is charged at the Cori Haswell rate. If you are performing COVID-19 related research and require additional allocation to support your work, please indicate that on the form when you apply. The Spin container-based platform at NERSC was upgraded with a new cluster of large-memory nodes to support a broader range of services, including those with memory footprints as large as 1-2 TB, such as - epidemiological models used to study the SARS-CoV-2 virus, - large in-memory databases, - memory-intensive web applications. Though Spin is intended for persistent services rather than HPC workloads, the large-memory nodes in the new cluster are also well-equipped to satisfy bursts of computing and I/O demand from services, with 64 AMD EPYC cores each, SSD-based local storage, and SSD-cached attached storage. If you're interested in using these resources, please [contact NERSC]( with more details about your project. ### Cori Default Python Modules Changed at Last Maintenance <a name="pythonmodules"/></a> On December 21, 2020, we changed Cori's default Python module (python/3.7-anaconda-2019.10) to a newer version (python/3.8-anaconda-2020.11). What does this mean for you? The new module features new versions and software: - Python 3.8 - Conda 4.9.2 - Mamba 0.1.2 (faster alternative to Conda). There are a few things to be aware of when using the new Python module: - Pip-installed packages (via `--user`) are tied to the previous default module and will need to be reinstalled to be used with the new module. - In the new module, you will need to reinstall pip packages installed via `--user` - More info is available here: <> - Conda environments will require few changes. - You can still launch old environments from the new module - If you use `conda init` to write to your `.bashrc` file, you may consider deleting these lines and re-running `conda init` - More info is available here: <> Please open a ticket at <> with any questions. ([back to top](#top)) --- ## Calls for Participation <a name="section4"/></a> ## ([back to top](#top)) --- ## Upcoming Training Events <a name="section5"/></a> ## ([back to top](#top)) --- ## NERSC News <a name="section6"/></a> ## ### No New "NERSC User News" Podcast this Week <a name="nopodcast"/></a> There will be no new episode of the "NERSC User News" podcast this week. We encourage you to instead enjoy some of our most recent episodes and greatest hits: - [Software Support Policy]( In this interview with NERSC HPC Consultant Steve Leak, learn about the new NERSC software support policy: what it is, how it works, and its benefits for users and NERSC staff alike. - [NERSC Power Upgrade]( In this interview with Berkeley Lab Infrastructure Modernization Division's David Topete, learn about the power upgrade happening this weekend, the work that has to be done, and the steps taken to ensure the safety of the workers involved in the effort. - [Dynamic fan]( NERSC Energy Efficiency Engineer Norm Bourassa talks about how NERSC is saving energy with the dynamic fan settings on the Cori supercomputing cabinets, and what NERSC is doing to make the cabinets even more energy efficient. - [RAPIDS]( In this interview with NVIDIA RAPIDS senior engineer Nick Becker, learn about the RAPIDS library, how it can accelerate your data science, and how to use it. - [IO Middleware]( NERSC Principal Data Architect Quincey Koziol talks about IO Middleware: what it is, how you can benefit from using it in your code, and how it is evolving to support data-intensive computing and future supercomputing architectures. - [NERSC 2019 in Review and Looking Forward]( NERSC director Sudip Dosanjh reflects upon the accomplishments of NERSC and its users in 2019, and what he's looking forward to in 2020 at NERSC. - [Community File System]( NERSC Storage System Group staff Kristy Kallback-Rose, Greg Butler, and Ravi Cheema talk about the new Community File System and the migration timeline. - [Monitoring System Performance]( NERSC Computational Systems Group's Eric Roman discusses how NERSC monitors system performance, what we're doing with the data right now, and how we plan to use it in the future. - [The Superfacility Concept]( Join NERSC Data Science Engagement Group Lead Debbie Bard in a discussion about the concept of the superfacility: what it means, how facilities interact, and what NERSC and partner experimental facilities are doing to prepare for the future of data-intensive science. - [Optimizing I/O in Applications]( Listen to an I/O optimization success story in this interview with NERSC Data and Analytics Services Group's Jialin Liu. - [NESAP Postdocs]( Learn from NESAP postdoc Laurie Stephey what it's like working as a postdoc in the NESAP program at NERSC. The NERSC User News podcast, produced by the NERSC User Engagement Group, is available at <> and syndicated through iTunes, Google Play, Spotify, and more. Please give it a listen and let us know what you think, via a ticket at <>. ### Come Work for NERSC! <a name="careers"/></a> NERSC currently has several openings for postdocs, system administrators, and more! If you are looking for new opportunities, please consider the following openings: - [NESAP Engineer]( Enable new scientific advancements by enabling scientists to exploit cutting-edge computational science techniques in machine learning, data analysis, and/or simulation on NERSC's next supercomputer. - [NESAP for Data Postdoctoral Fellow]( Work in multidisciplinary teams to transition data-analysis codes to NERSC's new Perlmutter supercomputer and produce mission-relevant science that truly pushes the limits of high-end computing. - [NESAP for Simulations Postdoctoral Fellow]( Work in multidisciplinary teams to develop and optimize codes for the Perlmutter system and produce mission-relevant science that pushes the limits of high-performance computing. - [NESAP for Learning Postdoctoral Fellow]( Work in multidisciplinary teams to develop and implement cutting-edge machine learning/deep learning solutions in codes that will run on NERSC's new Perlmutter supercomputer and produce mission-relevant science that pushes the limits of AI on high-performance computing. - [Systems / DevOps Engineer]( Use your DevOps and system engineering skills to help build and manage systems that complement NERSC's supercomputing environment. (**Note:** We have received reports that the URLs for the jobs change without notice, so if you encounter a page indicating that a job is closed or not found, please check by navigating to <>, scrolling down to the 9th picture that says "All Jobs" and clicking on that. Then, under "Business," select "View More" and scroll down until you find the checkbox for "NE-NERSC" and select it.) We know that NERSC users can make great NERSC employees! We look forward to seeing your application. ### Upcoming Outages <a name="outages"/></a> - **Cori** - 01/20/21 07:00-20:00 PDT, Scheduled Maintenance - 02/17/21 07:00-20:00 PDT, Scheduled Maintenance Visit <> for latest status and outage information. ### About this Email <a name="about"/></a> You are receiving this email because you are the owner of an active account at NERSC. This mailing list is automatically populated with the email addresses associated with active NERSC accounts. In order to remove yourself from this mailing list, you must close your account, which can be done by emailing <> with your request. _______________________________________________ Users mailing list

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