Least connected load balancing strategy #267
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It will now track count of active (checked out of the pool) resources per key. Where key is a server address in the driver. Counter is incremented when resource is acquired from the pool and decremented when resource is released back to the pool. Also added JSDocs in the `Pool` class.
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This replaces the existing round-robin. It gives us better performance
with clusters composed of different machine capacities.
Lease connected load balancing strategy selects start index in
round-robin fashion to avoid always selecting same machine when cluster
does not have any running transactions or all machines have same number
of active connections.
It is possible to go back to previous round-robin load balancing
strategy using an experimental config setting:
```
{loadBalancingStrategy: 'round_robin'}
```
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praveenag
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Jul 12, 2017
praveenag
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Jul 12, 2017
| const strategy = RoutingDriver._createLoadBalancingStrategy({loadBalancingStrategy: 'round_robin'}, new Pool()); | ||
| expect(strategy instanceof RoundRobinLoadBalancingStrategy).toBeTruthy(); | ||
| }); | ||
|
|
There was a problem hiding this comment.
This is missing a test case for 'Unknown load balancing strategy
|
@praveenag test added |
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This replaces the existing round-robin. It gives us better performance with clusters composed of different machine capacities. Lease connected load balancing strategy selects start index in round robin fashion to avoid always selecting same machine when cluster does not have any running transactions or all machines have same number of active connections.
It is possible to go back to previous round-robin load balancing strategy using an experimental config setting: