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Develop a RESTBase Cassandra cluster capacity planning document
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Needed, is a document which details acceptable levels of Cassandra cluster utilization, and prescribes timely, proactive measures as utilization increases. Ideally, this document would provide the means to plug-in current (or proposed) overall storage and utilization, and rate of growth, in order to project remaining runway to "actionables" (culling, upgrades, etc).

I propose we use:

Event Timeline

Worth noting:

At this time, the nodes in eqiad rack 'd' are in currently running cleanups, and their disk utilization is not indicative. However, utilization of the machines in racks 'a' and 'b' should be accurate, and average disk utilization there is already at 45%.

See also: T132615: Legacy data?

GWicke triaged this task as Medium priority.Oct 12 2016, 4:56 PM
GWicke added a project: Services (later).

See also T97692: RESTBase capacity planning for 2015/16 and T97710: Estimate storage capacity needed for storing all HTML revisions. Much of this is still relevant.

A major variable for capacity planning is the timing and actual efficiency of brotli compression (see T122028).

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