Our on-call engineer’s investigation begins by looking at metrics and logs. We have a wide array of instrumentation, including measurements of how frequently we process each user action type and how long processing takes. These often provide useful hints about bursty activity, like a flurry of hype and reactions on that sweet new game that just got shadow-dropped, but even if we find an inciting event, it’s tricky to gauge what the experience was for users. Think of it like your car’s dashboard: it can tell you what the engine temperature is, but not the consequences of it running hot.
By the end of the job, we've paginated through the entire source partition in batches, and offloaded each batch to S3. And we now have also filled our copied partition with all of the same data as we had in the original partition, except with the keys in S3 instead of the actual payloads.
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stack.push(cur);
5. Innovation ·
Code dump for 2.16