Alex Marangone
Senior Storage Engineer at Lambda
Sacramento, California, United States
Summary
👤
Senior🎓
Top SchoolAlex Marangone is a Senior Storage Engineer with 15 years of experience designing and operating distributed storage systems, currently building a high-performance local S3-compatible object store at Lambda. He has a deep Ceph pedigree—contributing to core tooling like osdmaptool and Prometheus exporters to surface cluster health—bringing practical expertise in OSD management, CRUSH tuning, and production monitoring. His career spans hands-on roles at DigitalOcean and Red Hat (including Inktank), where he moved from consultancy to senior engineering and architecture roles solving real-world scale and reliability problems. Based in Sacramento, he combines low-level backend systems work with observability improvements, and is known for pragmatic changes that reduce operational friction while preserving performance.
15 years of coding experience
8 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at INGESUP
English, French
Github Skills (21)
filesystem10
c-language10
storage10
distributed-systems10
data-storage10
go10
prometheus10
object-store10
ceph10
distributed-file-system10
cprogramming-language10
testing9
command-line-interface9
regex9
block-storage9
Programming languages (6)
Github contributions (5)
digitalocean/ceph_exporter
Jun 2019 - Dec 2021
Prometheus exporter that scrapes meta information about a ceph cluster.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 reviews, 15 commits, 21 PRs in 2 years 5 months
Contributions summary:Alex contributed to the Prometheus exporter for Ceph by adding functionality to collect and expose more health metrics, specifically related to unclean placement groups, crash reports, and the number of OSDs with too many repairs. They modified the `health.go` and `health_test.go` files to include these new metrics and added corresponding test cases. Additionally, they modified `pool.go` to correct the profile of replicated pools, and restored an older change to `osd.go`.
exporterprometheus-exporterceph-clustermetaceph
ceph/ceph
Jan 2013 - Oct 2022
Ceph is a distributed object, block, and file storage platform
Role in this project:Backend Developer
Backend DeveloperContributions:1 review, 39 commits, 4 PRs in 9 years 9 months
Contributions summary:Alex Marangone primarily contributed to the `osdmaptool` utility, enhancing its functionality. His work included adding features to mark OSDs up/in, adjusting CRUSH weights, and modifying the tool's saving and overwriting behavior. Additionally, he introduced a `created_at` and `ceph_version_when_created` meta data to the OSD. These changes involved modifying the tool's core logic related to Ceph's storage management.
fusefile-storagecephstorageopenebs
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