I work at Trello. I believe we're seeing ~1000 updates/sec and ~10000 reads/sec at peak. That said, our data is split across 7 shards. Total documents count

I work at Trello. I believe we're seeing ~1000 updates/sec and ~10000 reads/sec at peak. That said, our data is split across 7 shards. Total documents count is in the low billions.