Add option for merging cluster updates#3941

Merged

mattklein123 merged 38 commits intoenvoyproxy:masterfrom

rgs1:coalesce-health-checks

Jul 31, 2018

Commits on Jul 24, 2018

Add option for coalescing cluster updates
Raul Gutierrez Segales
committed
Address review
Raul Gutierrez Segales
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Address more review comments
Raul Gutierrez Segales
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Commits on Jul 25, 2018

Fix docs
Raul Gutierrez Segales
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Preserve order when merging updates
Raul Gutierrez Segales
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Address @htuch's review
Raul Gutierrez Segales
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Skip immediate apply if there's an active timer
Raul Gutierrez Segales
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Fix a few more issues pointed out by @htuch
Raul Gutierrez Segales
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Improve existing test
Raul Gutierrez Segales
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Move EXPECT_CALL() to the top for clarity
Raul Gutierrez Segales
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More tests
Raul Gutierrez Segales
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Commits on Jul 26, 2018

Cleanup tests
Raul Gutierrez Segales
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Improve naming
Raul Gutierrez Segales
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Erase cluster from updates_map_ from removeCluster()
Raul Gutierrez Segales
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Commits on Jul 27, 2018

Drop merging adds/removals
Raul Gutierrez Segales
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Commits on Jul 28, 2018

Fix memory leak
Raul Gutierrez Segales
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Commits on Jul 30, 2018

Make 2 local vars const.
Raul Gutierrez Segales
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More constness, remove newline & spelling.
Raul Gutierrez Segales
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Simplify use of shared_ptrs/refs/weak ptrs
Raul Gutierrez Segales
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More review comments
Raul Gutierrez Segales
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version history: sort & reflow cols
Raul Gutierrez Segales
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Collapse the number of map lookups
Raul Gutierrez Segales
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Unconditionally remove cluster from updates map
Raul Gutierrez Segales
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Reorder members of PendingUpdates
Raul Gutierrez Segales
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Add TODO for extending Event::Timer's interface
Raul Gutierrez Segales
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Make const empty vectors static
Raul Gutierrez Segales
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Assert we are not enabling an already enabled timer
Raul Gutierrez Segales
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More counters
Raul Gutierrez Segales
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Explain a possible race condition
Raul Gutierrez Segales
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Simplify branching
Raul Gutierrez Segales
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Increment counter if merging is enabled
Raul Gutierrez Segales
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Counter renames + more tests
Raul Gutierrez Segales
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Remove trailing newline
Raul Gutierrez Segales
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Fix format
Raul Gutierrez Segales
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Commits on Jul 31, 2018

Fix spelling
Raul Gutierrez Segales
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Rename offwindow → out_of_merge_window
Raul Gutierrez Segales
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Add comment to explain why we keeping some stats
Raul Gutierrez Segales
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Document new cluster stats
Raul Gutierrez Segales
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