Query Plan and Operation-Aware Communication Buffer Management

摘要

Data messages having different priorities may be stored in different communication buffers of a network node. The data messages may then be forwarded from the communication buffers to working buffers as space becomes available in the working buffers. After being forwarded to the working buffers, the data messages may be available to be processed by upper-layer operations of the network node. Priorities may be assigned to the data messages based on a priority level of a query associated with the data messages, a priority level of an upper-layer operation assigned to process the data messages, or combinations thereof.

主权项

1. A method for buffer management in a distributed database network, the method comprising:
receiving, by a lower-layer buffer management entity in a first network node, data messages from a second network node, wherein a query execution plan assigns at least some of the data messages to be processed by different upper-layer query processing operations of the first network node, and wherein each of the upper-layer query processing operations is configured to process data stored in a corresponding one of a plurality of working buffers; determining, by the lower-layer buffer management entity, priority levels associated with the data messages based on a priority level of a corresponding upper-layer query processing operation assigned to process the corresponding data messages; and buffering the data messages in communication buffers of the first network node in accordance with the priority levels associated with the data messages, wherein data messages having different priority levels are stored in different communication buffers, and wherein the data messages stored in the communication buffers are not available to be processed by the upper-layer query processing operations until the data messages are forwarded from the communication buffers to the working buffers.