Jun 2020 – May 2024 · 3 yrs 11 mos

• Technical Lead for Cloud Data Protection Solutions in HPE GreenLake Platform. I specialize in core datapath performance engineering for VMWare VADP based Solutions and AWS EBS Direct APIs. Designed and developed data mobility features like Direct Backup to Cloud, Backups to HPE StoreOnce Catalyst and CloudBank Stores as part of HPE SimpliVity Data Protection Engineering group.

May 2015 – Jun 2020 · 5 yrs 1 mo

• IO Accelerator for 3PAR File appliance
• This involved the design and implementation of a log structured write acceleration layer to aggregate multiple small writes into larger writes to improve throughput for small writes. An adaptive destage mechanism asynchronously tiered the log data into the backing file system. My responsibilities include:
• Design and implement the data path changes in the filesystem
• Performance tuning of the logging and destage mechanism – analyze performance characteristics (throughput, latency) across different workloads and file sharing protocols.
• Make provisions for data dedupe and compression in the accelerator to improve storage efficiency.
• Storage for Containers: Software Defined IO Enhancer
• This project was to demonstrated a fully-software defined I/O acceleration layer for improved performance and enable seamless migration of containers across nodes. Implemented am on-demand cache warmup that ensures fast and seamless access to storage for a migrated container without impacting other containers co-located on the source and target nodes.
• Improving Filesystem Snapshot Accessibility in NFS shares
• The HPE 3PAR FilePersona supported a mechanism which allowed snapshots to be accessed from a designated snapshot root. The enhancement involved supporting the snapshot access from any arbitrary directory and expose them as a virtual directory within an NFS share. This allows FS users to access snapshot from their own directory layout, without needing any Administrator intervention.
• HPE Techfluence Program
• Was part of a one year mentorship program that involved application of Design Thinking Methodology to solve very high level business problems. Worked on a group project and proposed one technical Solution to solve problems identified in the HCI at Edge and Hybrid Cloud areas.

Mar 2014 – May 2015 · 1 yr 2 mos · Bangalore

• Part of the Server Storage group
• Good understanding of Software RAID products on Windows and Linux platforms
• Windows Storage device drivers
• Server side caching

Jul 2010 – Feb 2014 · 3 yrs 7 mos

• Technical consultant and architect responsible for maintanance of FileSystem and FS utilities software.
• Good understanding of filesystem as a standalone appliance (NetApp WAFL) as well as a distributed software used as an enterprise scale out NAS server (HP Ibrix Filesystem).
• Developed expertise on VFS and Linux file system implementations ( ext2 and its variants)
• Well versed with crash dump analysis and debugging complex problems
• Worked on Failover and high availability features of the cluster file system.
• Responsible for strategizing quality improvement, performance investigation and improving stability of the file system and FS utilities such as data consistency checkers (fsck) and data mobility tools.
• Developed a linux kprobe based error injection framework for simulating disk I/O and network errors, as part of a quality improvement initiative for the Ibrix FileSystem.

Jan 2005 – Jun 2010 · 5 yrs 5 mos

• Senior software designer for a system security software on HP NonStop servers.
• Involved in development of advanced security features implementation – introduced HMAC based password encryption and password quality restrictions on the NonStop platform.
• Involved in maintenance and quality improvement initiatives of the safeguard and standard security products.
• Worked on complex problems that involved close interaction with FileSystem, device driver and kernel code.
• Handled field escalations in NonStop systems involving security software.

Jan 2001 – Dec 2003 · 2 yrs 11 mos

• Software Engineer responsible for sustaining of Middleware products on HP NonStop platform
• Sustenance of NonStop Distributed Computing Environment (DCE) – involved solving several complex defects including memory leak & memory corruption issues.
• Pthreads - Involved in development of features like Non-blocking IO, Extending system limits, Memory usage improvements, thread aware signal handling.