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--- news [2022/08/22 18:18] – created aorth
+++ news [2023/03/27 05:54] – aorth
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 ====== ILRI Research Computing News ======
 Here we will post news and announcements about the ILRI research-computing infrastructure, including important updates, breaking changes, etc.
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+===== March 23, 2023: planned maintenance/upgrade =====
+I am planning to upgrade the HPC's backend storage systems to a new version of their operating system (CentOS)¹ on Monday, March 27rd at 9AM (EAT). Due to the invasive nature of these upgrades I will need to stop existing SLURM jobs and restrict access to the clsuter. The work will probably take the entire morning.
+---
+¹ Technically speaking, we are upgrading from CentOS 7 to CentOS Stream 8, which is the same upgrade I've performed on several compute nodes over the past few months. This is a major upgrade that we only perform every five years or so, and will modernize and increase security on HPC.
+===== November 15, 2022: planned maintenance/upgrade =====
+We are planning to upgrade the operating system on the HPC head node. This will bring the OS from CentOS 7 to CentOS Stream 8, which is the same upgrade we did on all compute nodes several months ago. The maintenance will take place on:
+                         Friday, November 25th @ 2–5PM
+Any SLURM jobs that are still running will be re-queued and held until after the maintenance is over. The cluster will be inaccessible during this time.
+Please bear with us for this important update to our infrastructure.
+Thank you!
+===== August 28, 2022: power issues in Nairobi =====
+Unfortunately we had major power issues at the ILRI, Nairobi campus this weekend and the entire cluster was powered off several times. ILRI ICT is doing emergency maintenance on the UPS power backup system to hopefully mitigate issues like this in the future.
+If you had any jobs running they may have crashed or been resubmitted. Please check carefully to see the state of your jobs and let me know if you have any questions.
+  * **2022-08-29**: Power went off again at 8:00AM.
+  * **2022-08-30**: Power went off again at 3:30PM.
 ===== August 22, 2022: updated syntax for SBATCH scripts =====
-Due to a change in the SLURM resource scheduler behavior, the syntax for SBATCH scripts must change slightly. If you are seeing errors such as this:
+Due to a change in the behavior of our SLURM resource scheduler, the syntax for SBATCH scripts must change slightly to fix an issue with environment modules. If you are seeing errors such as this:
 <code>/var/spool/slurmd/job747929/slurm_script: line 8: module: command not found</code>
@@ Line 10: / Line 40: @@
 <code>#!/usr/bin/bash -l</code>
+The new syntax requires ''-l'' after the bash command.
+----