[RFE] Show "Region History" for whole cluster

[akvadrako]

Hi. Hannibal is beautiful, but there is one view I'm missing. I would like to see something like the "Region History" chart for the whole cluster, but of course only for short time intervals.

Then it could be used like a monitoring page for our cluster, especially showing:

• which splits are on-going
• how many compactions are happening
• and pointing out when a compaction takes a long time

[meniku]

Thank you for your suggestions.

• To your first Point: I never thought about splits until now because Hannibal is designed to aid users who do their splits manually. However, that does not mean that this could not be interesting. Do you have some idea how this kind of information could be retrieved and vislualized?
• Regarding the compactions: you may check out the 'next'-branch, there is an expermitental compactions graph (Screenshot) drawn below the cluster-graph. I would be glad to hear feedback about it.
• Totally agreed with your third point. Maybe we should add a new page especially for the Compactions, which shows the already mentioned compactions graph as long as some numbers for long-running compactions. What do you think?

[akvadrako]

• For splits, I'd like the same info for compactions: size, duration, frequency
• That is basically what I'm looking for, but I could get a better picture if I could see both the frequency of compactions and how long they take
• I think a separate page is better, since the cluster page is a snapshot that doesn't change much and the compactions page can be more "live".