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Ran 06 Nov 2016 08:16AM UTC

Files 48

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Committed 06 Nov 2016 08:04AM UTC coverage: 74.343% (-0.05%) from 74.392%

Job # TRAVIS_COVERAGE=1

Build Type

push

travis-ci

Committed by

web-flow

Commit Message

server/cache: reorganize the cache (#359)

* server/cache: hide regions in clusterInfo

regionsInfo will be rewrote later, we should not access it directly.

* server/cache: reorganize the cache

First, stores and regions are reorganized so that we can easily access
the information we need.

Second, the algorithm to handle region heartbeat is modified
accordingly, to handle Split and Merge.

It's hard to handle Split and Merge perfectly to keep the cache always
reflecting the newest information about which region is serving which
range. But we can keep the cache always updating according to the region
heartbeat.

Here's how we handle region heartbeat. First, if the region does not
exist, it is added to the cache directly. Second, if the region exists
but the heartbeat is stale, an error will be returned. Finally, if the
region exists and the heartbeat is not stale, it is updated to the
cache. Additionaly, every time a region is added or updated, all range
overlap regions will be deleted from the search tree first, and then
the region will be inserted. Note that regions deleted from the search
tree can still be found by the region id.

Run Details

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master: 88%

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master: 88%

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