Sunny Kumar
Engineering at Flexera
Glasgow, Scotland, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolSunny Kumar is an experienced back-end engineer with 8 years in systems and storage software, currently based in Glasgow and working at Flexera. He has deep expertise in distributed storage, having made substantive contributions to high-profile open-source projects like GlusterFS and Ceph—most notably implementing and hardening snapshot management and resolving complex LVM and RBD issues. His career includes senior engineering roles at EDB and Red Hat, and prior work on kernel configuration and device drivers that give him strong low-level systems instincts. Sunny combines practical production fixes with build and scheduler improvements, demonstrating an ability to move between bug fixes, feature work, and infrastructure-level changes. Colleagues value his focus on stability and correctness in storage stacks, with a track record of addressing subtle mount/unmount and cleanup edge cases. He holds an MCA and a BSc in Computer Science and brings both academic grounding and hands-on systems experience to storage engineering challenges.
8 years of coding experience
11 years of employment as a software developer
MCA, Computer Science, A, MCA, Computer Science, A at Pondicherry UniversityBachelor's Degree, Computer Science, A, Bachelor's Degree, Computer Science, A at Sikkim Manipal University - Distance Education
Github Skills (23)
glusterfs10
filesystem10
python10
storage10
distributed-systems10
c-programming10
c1110
snapshots10
c1710
data-storage10
block-storage10
distributed-file-system10
distributed-database10
debug9
c-language9
Programming languages (6)
Github contributions (5)
gluster/glusterfs
Aug 2017 - May 2020
Gluster Filesystem : Build your distributed storage in minutes
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 reviews, 247 commits, 1 PR in 2 years 9 months
Contributions summary:Sunny primarily worked on the "snapshot" functionality within the GlusterFS project. Their contributions focused on resolving issues related to snapshot activation, deactivation, and restoration, including brick mount point management. They modified the code to handle mount point creation, unmounting, and validations for different snapshot statuses, specifically within the `glusterd-snapshot.c` file. Furthermore, they fixed coverity issues and addressed bugs related to LVM cleanup and snapshot creation after brick operations.
erasure-codingstoragepersistent-storagedistributed-storagefuse-filesystem
ceph/ceph
Sep 2020 - Feb 2022
Ceph is a distributed object, block, and file storage platform
Role in this project:Back-end Developer
Back-end DeveloperContributions:85 reviews, 27 commits, 13 PRs in 1 year 5 months
Contributions summary:Sunny primarily contributed to the Ceph storage platform by addressing bugs, enhancing existing functionalities, and refining the configuration options. They fixed an issue related to the creation of the 'device_health_metrics' pool and also tackled a problem in the RBD module. The user modified the build script for Fedora and updated handling of parameters for the mclock scheduler and the rbd device. Overall, the contributions focus on improving the stability and functionality of the Ceph storage system.
fusefile-storagecephstorageopenebs
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