Posts – Andrea Zonca

Deploy a ChatGPT-like LLM on Jetstream with llama.cpp

jetstream

llm

This is a crosspost of the official Jetstream documentation: Deploy a ChatGPT-like LLM service on Jetstream. I built a brand new version of that tutorial that swaps in llama.…

PySM Methods Paper Published in ApJ

openscience

pysm

python

The Astrophysical Journal formally published our paper, Full-sky Models of Galactic Microwave Emission and Polarization at Sub-arcminute Scales for the Python Sky Model, on S…

Inspect SMTP sending through UCSD

Python

When configuring email sending through UCSD, it can be surprisingly unclear which SMTP server to use. The official documentation mentions three options: smtp.ucsd.edu, smtp.g…

OpenStack Unshelver Demo

openstack

jetstream

I recently vibe-coded a lightweight web application, using gpt-5-codex, that revives shelved OpenStack instances on demand. The stack is intentionally minimal: a FastHTML…

Deploy a 70B LLM to Jetstream

jetstream

llm

Deploying large language models on Jetstream is getting easier thanks to the official Jetstream LLM guide. Here I follow that walkthrough but scale the hardware and model so…

Timing the Unshelving of a Jetstream 70B LLM Instance

jetstream

llm

Following the work documented in Deploy a 70B LLM to Jetstream, the Meta-Llama-3.1-70B-Instruct-GGUF deployment is now running on a g3.xl instance. The goal of this…

Python for HPC

Python

HPC

Python is often the first choice for prototyping research ideas, but scaling that prototype to thousands of cores and multi‑node workflows needs a different toolkit. This…

Execute Pegasus Jobs on Expanse

SDSC

HPC

Pegasus is a workflow management system that helps scientists and engineers execute complex computational workflows. It maps a user’s abstract workflow onto available…

Use VS Code on Expanse

Using VS Code directly on Expanse, or other HPC systems, is generally not recommended due to the high resource usage of the IDE itself. These systems are optimized for…

How to Use AI Chat Assistants While Traveling

ai

LLM

Traveling often means unreliable or expensive internet access, especially on airplanes or in remote areas. Here are two practical ways to keep using AI chat assistants even…

Voyager enters ACCESS allocations Phase

ai

sdsc

As of June 1, 2025, SDSC’s Voyager supercomputer has transitioned from its testbed phase to the ACCESS Allocations Phase. All research use now requires an official ACCESS…

How to use GitHub Copilot for Scientific Computing

github

ai

python

GitHub Copilot is rapidly transforming the landscape of scientific computing by streamlining code development and accelerating research workflows. This guide outlines how…

Python and AI Coding Summer Camp in person in San Diego

python

I’m excited to announce that I’ll be teaching a brand new Python and AI Coding Summer Camp in person in San Diego, hosted at the Italian School of San Diego (Kearny Mesa)!

VS Code Copilot Agent Mode: A Productivity Showcase

llm

ai

Visual Studio Code, together with GitHub Copilot in agent mode, enables a more focused and efficient development workflow. Below are three practical examples of how this…

Astrophysics Papers Daily Summaries Notebook with the Jetstream LLM Inference Service

astrophysics

llm

jetstream2

Fetch today’s astro-ph papers from arXiv, summarize abstracts with llm, and output a Markdown summary.

BK18 Added to Panexp Model Suite and New Websky Radio Source Models in PySM 3.4.1

pysm

cmb

Following up on my previous post about Panexp model suite simulations, there have been several important updates:

Deploy a NFS server to share data between JupyterHub users on Jetstream

kubernetes

jetstream

jupyterhub

linux

This is an updated version of my 2023 tutorial on deploying a NFS server to share data between JupyterHub users on Jetstream.

How to request High Performance Computing (HPC) resources

hpc

I am often asked how a scientist located in the US can access supercomputing resources. I decided to write a blog post with an overview of the options, consider that I’m…

PySM 3.4.1 Released

openscience

pysm

python

PySM version 3.4.1 is now available. It can be downloaded from PyPI. The release notes detail new features and improvements.

healpy 1.18.1 released

healpy

python

Just released healpy 1.18.1, this version includes important bug fixes, please test and open issues at https://github.com/healpy/healpy/issues

New Simulations of the Panexp Model Suite for Planck and WMAP

pysm

cmb

Following up on my recent post about PySM models for Galactic emission, I have recently executed three new simulations of the Panexp model suite:

Gateways 2024 - Tutorial on Creating a Serverless Research Data Repository based on Globus

data

Following our work published at PEARC 2024 presenting a Data Portal based on a static website built on top of Globus HTTPS services, we presented a tutorial at Gateways 2024.

Jetstream2 Usage Monitoring

jetstream2

Monitoring resource usage on cloud platforms is essential for managing allocations effectively. For users of Jetstream2, the Unidata team has developed a useful script to…

Deployment of BinderHub by Project Pythia on Jetstream 2

kubernetes

jetstream2

Project Pythia has recently published a blog post about their deployment of BinderHub on Jetstream 2. This blog post discusses Project Pythia’s efforts to address “Jupyter…

New Paper on Arxiv about Models of Galactic Emission in the Microwaves for CMB Experiments

openscience

pysm

python

A new paper has been published on Arxiv discussing models of Galactic emission in the microwaves for Cosmic Microwave Background (CMB) experiments: