Scaling lessons learned at Dropbox, part 1
eranki.tumblr.com
JULY 13, 2012
Another thing that became increasingly useful was to have thousands of custom stats aggregated over thousands of servers graphed. Or if you’re going to cache something out of the database, simulate the effects and tally up the hits so you can justify spending time worrying about the invalidation policy, etc. App-specific metrics.
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