Tim Burke candidacy for Swift PTL (Yoga)

Change-Id: I01e41728375f2b6c9a241ec6b27ecb8429a6cd00

candidates/yoga/Swift/tburke@nvidia.com

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+It would be my pleasure to continue serving as Swift PTL for the Yoga cycle.
+
+This past cycle, we have continued our commitment to operational excellence.
+We've improved several features vital to large clusters, such as container
+sharding, partition power increases, and storage-policy reconciliation. We've 
+improved the durability of erasure-coded data immediately after a write. We've
+made our logs, metrics, and errors more useful.
+
+We focus on operators for several reasons. Operators are at the junction of the 
+software we write, the hardware we use, and the clients we serve. They have
+perhaps the best perspective to see the value-to-effort ratio of prospective
+improvements. They run the experiments that establish and optimize deployment
+patterns. They manage the drives and networking that allow us to serve hundreds
+of petabytes at terabits per second, and their projections tell us that storage
+must become bigger and faster.
+
+Thinking like an operator, there are several areas where Swift should improve.
+Replication and reconstruction continue to be a delicate balancing act between
+moving data for the sake of expansion vs. ensuring durability. We need a better
+handle on which data gets accessed, how frequently, and with what sort of
+performance -- ideally indexed by tenant and even user. As more clusters are 
+stood up in more regions, we need to improve monitoring and recovery such that
+clusters can run with minimal human intervention.
+
+I look forward to working with the community to bring Swift into a future of 
+ever-larger and ever-more-numerous clusters.