As a member of the Scale Out Networking group, I primarily working on:

• Enhancing and maintaining the TCP/IP Network Stack's MP architecture & threading model

• Incorporating the FreeBSD open source Network Stack into the Ontap ecosystem

• Network Performance, in particular on next generation systems with higher CPU count

• Cluster Performance

• Network Buffer (mbuf) infrastructure.

• Packet flood/DOS mitigation strategies

• Interfacing with the hardware NIC team

The position also involves offering expertise to and working with teams across NetApp to triage, root cause and fix network and cluster performance issues, and mbuf corruptions, linkage and reference count errors.

Member of the team developing the core Data Ontap Operating System, the world's most widely used storage OS which is based on FreeBSD. I have worked on various aspect of the Operating System, all the way from low level elements like memory management and bootloaders, to writing userspace daemons and startup scripts.

Some of my responsibilities have included:

• Memory Management

• Integrating the core Ontap kernel module into the FreeBSD ecosystem

• Booting including the Bootloader, Bootmenu and user space startup scripts

• Supportability including a mechanism to automatically triage user space cores, and logging

• Timekeeping and timezone services

• Cluster management using a distributed framework, database and APIs

• Console and admin access issues

A large part of my role also involved providing technical expertise and debugging help to engineering groups that use the underlying services provided by us, and triaging, root causing and fixing incoming bugs.

Member of the vFiler Multistore team. vFiler is a product that compartmentalize storage resources on a NetApp data storage system into distinct administrative units, allowing multitenancy on a single storage system.

This product cut across and encompassed every major subsystem in Data Ontap from protocols like NFS and CIFS to the WAFL file system, networking, high availability, data protection, recovery and mirroring, etc.