David Wysochanski Email & Phone Number

* Analyze customer problem trends in filesystems. Suggest product changes to help avoid customer problem points and escalations, and where possible design away problems.* Convert kernel vmcore analysis system to RHEL8 / python3, and gitlab-runner based CI/CD for build and deploy (tests in progress), on multiple hardware architectures (x86_64, aarch64, s390x, ppc64le).

* Influence supportability of upcoming software releases of Red Hat Enterprise Linux pertaining to filesystems* Work with documentation, test, development, and product manager to prioritize customer issues in upcoming releases.* Continue all duties of principal software maintenance engineer* Test and provide supportability input to cross-functional team evaluating the ARM / aarch64 platform.* Special project in 2020: Develop and test NFS patches for integration of upstream maintainers re-write of the Linux kernel fscache API and new netfs API, and resolve problems with fscache in Red Hat Enterprise Linux.

* Specialize in Red Hat Enterprise Linux filesystems, and kernel support* Work cross functionally to prioritize customer issues for upcoming software releases* Review code for accelerated fix requests involving critical customer issues* Diagnose complex customer problems in mixed vendor environments.* Create reproducers of customer problems and file detailed bug report to ease burden on development and test engineering teams* Backport existing code fixes and propose new code fixes (mostly C) for customer problems.* Maintain (diagnose, patch, test, build, deploy) kernel crash analysis system which includes the following open source components: crash-utility, retrace-server, pykdump, as well as custom automated analysis (python, expect) software* Drive roll-out of multi architecture (non-Intel) kernel crash analysis system, including s390x, ppc, ppc64le, and aarch64* Create a post analysis "retrace-server-hooks" python project which allows support engineers to contribute their own custom automated analysis of Linux kernel crashes in the specific subsystem they support (for example, networking, storage, or filesystems).* Review test plans and identify gaps between customer uses and test plans* Resolve complex customer escalations which often involve multiple underlying issues

Raleigh-Durham, North Carolina Area

* Diagnose complex Linux server problems in mixed vendor environments* Analyze data captures such as networking packet captures, kernel and user space memory dumps and traces* Develop tools for data gathering and analysis of customer problems.* Backport existing code fixes and propose new code fixes for customer problems.* Provide guidance to junior team members* Assist with maintenance of kernel crash dump analysis system* Contribute to splitting monolithic multi-geography storage support specialty group into finer grained storage, filesystem, and cluster groups* Drive formation of multi-geography networking support specialty group

Raleigh-Durham, North Carolina Area

* Assist customer facing support representatives by investigating complex problems and suggesting action plans* Investigate kernel and userspace crash dumps of various storage software* Write knowledgebase articles with detailed problem description, diagnostic and resolution steps* Backport existing code fixes and propose new code fixes for customer problems.* Contribute to efficient customer support processes and tools* Travel to customer sites to resolve storage related problems

* Develop and maintain C userspace and kernel components of the Linux block storage stack* Project involvement includes LVM2, Device Mapper, SCSI midlayer, multipathing, and iSCSI & FCP protocols* Contributed to LVM2 development * liblvm (http://fedoraproject.org/wiki/Features/liblvm), a userspace library for applications to utilize LVM functionality * Bug fixing, minor feature addition, and unit tests

* Wrote and ported device drivers into Data ONTAP (TM), a BSD-based filesystem kernel* Participated in open-source Linux iSCSI software initiator development and interoperability* Debugged and patched kernel and userspace problems on Red Hat Enterprise Linux and SuSE Enterprise Linux* Assisted lead developer with unit testing, debugging, and feature addition for iSCSI software target implementation* Developed and maintained a TCP/IP sockets based iSCSI initiator test tool for target development* Co-chaired SNIA IP storage technical working group* Authored public knowledgebase articles and bug reports* Gave presentations on various technical topics* Authored small extension to iSCSI RFC in form of an Internet Draft and work towards RFC status (became RFC 4850)

* Wrote firmware and offline test and power-on self-test software for DS1LT card and HDSL2 card* Assisted hardware engineers by writing test software to validate new hardware

* Conducted web server performance research and analysis.* Modified the SPECweb96 benchmark to provide a more accurate measure of web server performance.

* Worked with another engineer in the development of an automated test tool for debugging temperature-sensitive circuit board components.* Programmed an 8051 microcontroller to provide functionality of test tool.

Ms, Computer Science

Bs, Mathematics And Computer Science