We've been running OpenTSDB at a very large scale (~100k writes/s) for the past year and a half and have been pretty happy with it. It's not as reliable on the

We've been running OpenTSDB at a very large scale (~100k writes/s) for the past year and a half and have been pretty happy with it. It's not as reliable on the read side as something like ganglia and the query options aren't as powerful as InfluxDB, but it can scale better than any other option I know of. The ability to look back into the past and get full-resolution metrics is a huge deal. With Ganglia or Graphite (which aggressively downsample old data) there's a lot of squinting to try to make out patterns past a week or so. That said, we also use HBase as our main data store, so we have a lot of experience with operating it. I'm not sure I could recommend OpenTSDB to an organization that lacks that expertise.