Selecting a host based on quality of stored data

A computing system, comprising:

• one or more processors;
• and
• a computer-readable storage medium having computer-executable instructions stored thereupon which, when executed by the processor, cause the processor to:
• forward database insert statements received by a distributed database node to a plurality of mirror hosts, wherein the forwarded database insert statements cause database entries to be added to databases on the mirror hosts;
• periodically receive health metrics from the plurality of mirror hosts, wherein a health metric includes data representing a summary of database or operating system activity on a mirror host during a period of time since a previous health metric was received, including:
• a count of entries added to the mirror host by the forwarded database insert statements, a count of errors caused by the forwarded database insert statements, operating system log entries indicating when the mirror host was offline, or resource monitor log entries indicating when one or more hardware components of the mirror was using all available capacity;
• receive a database query from a client computing device, wherein the database query includes a condition limiting results of the database query to entries inserted during a query-specified time period;
• select a mirror host of the plurality of mirror hosts to receive the database query based on the received health metrics;
• and
• forward the database query to the selected mirror host, causing the selected mirror host to retrieve entries specified by the query for delivery to the client computing device.

A computer-readable storage medium having computer-executable instructions stored thereupon which, when executed by a processor of a computing device, cause the computing device to:

• forward database insert statements received by a database node to a plurality of mirror hosts, wherein the forwarded database insert statements cause database entries to be added to the mirror hosts;
• receive health metrics from the plurality of mirror hosts, wherein a health metric includes data extracted from an operating system performance monitor log on the mirror host;
• receive a database query from a client computing device;
• select a mirror host of the plurality of mirror hosts to receive the database query based on the received health metrics;
• and
• forward the database query to the selected mirror host.