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Introduction

IBM's Ceph[1] engineering organization is looking for a senior software engineer to join the CephFS team. In this role you will collaborate with our worldwide Ceph engineering team to develop and enhance CephFS[2], the file system component of the Ceph software-defined distributed storage system. You will design and implement new capabilities and features to enable new use cases while improving scalability, performance and efficiency. You will participate in a vibrant and active open source community[3] to deliver enterprise-quality software.

CephFS comprises a wide-ranging software suite including Linux kernel and userspace clients, a clustered userspace metadata server, and a messaging layer for storing data with Ceph's native object store ('RADOS'), in addition to higher-level APIs for integrating with other systems (OpenStack, OpenShift, an NFS-Ganesha cluster, Samba, etc). As a member of the CephFS engineering team, you will have the opportunity to learn and work in many of these areas according to your experience and technical background. This role is specifically focused on experienced developers who are ready to work on new distributed algorithms to build out end-user features of the filesystem, such as instant cloning, file overlays, and coherent snapshots across multiple clients with a coherent distributed cache.

You will work remotely with a worldwide team so communication is key. You will collaborate with others using modern open source tools including git (and GitHub), Jenkins, Redmine, and community-developed testing and validation tools.

[2: ]https://docs.ceph.com/en/quincy/cephfs/, https://youtu.be/cNAxNSzZqzo?t=1311

Your Role and Responsibilities

Work closely with the global Ceph open-source, multi-company engineering team to develop and enhance CephFS, the file system component of the Ceph software-defined distributed storage system. You will collaborate with other developers and users by attending online meetings, participating in email lists and online chat rooms, preparing written documentation, and giving presentations about your work. You will be expected to work proactively with other team members and the community to develop your own knowledge, and to be ready to mentor new contributors as you develop expertise.

Contribute to the development of CephFS by designing and implementing new functionalities that enable innovative use cases. This includes designing new distributed algorithms, implementing them across clients and servers, and writing automated test cases to demonstrate they work. You will also identify and fix bugs and propose performance enhancements. This will involve work across our C++-language Metadata Server cluster and userspace clients, our Linux in-kernel client (which you may either develop on your own, or arrange with our kernel maintainers), and our messaging layer for storing data within Ceph's ""RADOS"" distributed object store.

Required Technical and Professional Expertise

• Minimum 10+ years of experience in product development domain

• Experience working with C++ codebases, or other systems languages and demonstrated ability

• Good debugging skills. Experience with live systems (via logging and interrogation) and examining core files

• Excellent English written and verbal communication skills, for our worldwide team

• Basic knowledge of Python, to use and enhance testing

• Working experience with Open sources

• Experience in git

• Demonstrated ability to understand large codebases and develop new features

Preferred Technical and Professional Expertise

• Experience with data storage and/or file systems

• Experience building distributed systems

• Experience working on distributed teams is a plus

• Past contribution to open source projects is favorable

About Business UnitIBM Systems helps IT leaders think differently about their infrastructure. IBM servers and storage are no longer inanimate - they can understand, reason, and learn so our clients can innovate while avoiding IT issues. Our systems power the world's most important industries and our clients are the architects of the future. Join us to help build our leading-edge technology portfolio designed for cognitive business and optimized for cloud computing.

This job requires you to be fully COVID-19 vaccinated prior to your start date and proof of vaccination status will be required before your start date. During the Onboarding process you will be asked to confirm your vaccination status, in case you are unable to get vaccinated for any reason, you can let us know at that stage. Please let us know if you are unable to be vaccinated due to medical or religious reasons. IBM will consider such requests on a case by case basis subject to submission of required proof by the candidate before a stipulated date.

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