Test different MCMC samplers and configurations for analysis

[eduardojsbarroso]

Description

When running the MCMC likelihood from Firecrown, we rely on the CosmoSIS package.
CosmoSIS offers multiple options for:

• Ensemble samplers
• Power spectrum generation
• Sampler configurations and tuning parameters

At the moment, we do not know which sampler (and configuration) performs best in terms of speed and precision for our cluster likelihood.

Reference configuration:
cluster_counts_mean_mass_redshift_richness_shear.ini

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Problem

We need to test different CosmoSIS samplers and configurations for cluster likelihood analyses in Firecrown. The goal is to identify the most efficient and accurate setup.

Current setup:

cosmosis cluster_counts_mean_mass_redshift_richness_shear.ini

Important: these runs should be executed using Slurm batch scripts, not directly from the terminal. Only use the test sampler on the terminal.
Checklist

• Review available CosmoSIS samplers and their configurations
• Write Slurm scripts to run Firecrown likelihood tests with each sampler
• Measure runtime performance for different sampler options
• Compare accuracy/precision of results across samplers
• Document recommended sampler configuration for cluster likelihoods