Queries

Server Selection

A query will only touch those edge servers that fall within the regions of the network being queried and will automatically choose the relevant edge servers from those currently reachable.

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Query Goals

Given that not all edge servers can be completely up-to-date at all times, goals can be set for a query to prioritise server selection in order to optimise a goal. For example, it may be more important for a query to return the latest data or the most complete data.

The goals that can be set for a query are:

  • Fastest response time (minimal latency)
  • Highest availability (maximum success)
  • Most recent data (choose servers with least stale data)
  • Most complete data (choose servers with most data)
  • Balanced workload (choose least busy servers)
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