Claude Science and private AWS HPC compute
Claude Science knows how to connect via SSH to execute work on compute servers and HPC clusters That is good, but not very good. It’s 2026, and who wants to hang an SSH server out on the naked, public Internet? What I really need for Claude Science and my compute … This should be table-stakes […]
Connecting Compute To Claude Science
July 2026 Update: Since writing the post below, I was able to get more hands-on with Claude Science including: Confirming that I can proxy AWS SSM traffic over the native Claude Science SSH connector; allowing access to private AWS HPC resources and compute servers Developed a Claude Science skill that can use the SSM […]
Your old AWS ParallelCluster stacks will NOT break in 2026
Note: This post is pure google bait designed to help others who run into the same problem. We hope it helps! We had been advising clients to rebuild older ParallelCluster stacks — the ones whose cleanup Lambdas are templated on python3.9 — by mid-2026, ahead of the published Lambda block dates. Those dates have moved. […]
Schrödinger Best Practices vs AWS PCS Limits
Modern HPC integration practices for Schrödinger workloads tend to want 10–12 Slurm partitions and matching host entries, because Maestro doesn’t let chemists pass Slurm arguments directly. That design preference collided with AWS Parallel Computing Service on a recent deployment: PCS has a hard, non-adjustable cap of 10 partitions and 10 compute node groups per cluster. […]
AWS PCS resolves Licenses length issue
Good news: The 1024-character limit in the AWS PCS custom slurm configuration parameter that enables license-aware job scheduling was recognized by AWS as a “bug” and recently resolved. The new character limit is 2048. TL;DR AWS Parallel Computing Service (PCS) previously capped every slurmCustomSettings.parameterValue at 1,024 characters. The limit applied uniformly through Terraform, the AWS […]
Schrödinger 2026-1 and broken jsc certs
Note: This post is pure google bait designed to help others who run into the same problem. We hope it helps! 16-April-2026: Correction – Schrödinger has documented this issue and a workaround at https://my.schrodinger.com/support/article/629509 You upgraded jobserverd, your functionality tests ran clean on the Slurm side, and a few hours later your scientists started complaining. […]
PCS or ParallelCluster for Schrödinger Suite?
Everything you never wanted to know about PCS and PCluster for Schrödinger Workloads but have been forced to find out Why? It’s rare for me to simultaneously work on ParallelCluster and PCS for the same workload, and I learned some things, enough to justify writing some words about it. Hope someone finds it useful! Drivers […]