| 摘要 |
According to a first aspect of the present invention there is provided a method of operating a distributed database comprising a plurality of database nodes each storing a set of data. The method involves measuring the latency that occurs at a database node when the database node contacts a further database node in order to respond to one or more data requests that relate to data that is stored or is intended to stored at the further database node, and comparing a measured latency to a latency threshold to determine if the latency threshold has been exceeded, and therefore determine if the latency is unacceptable. If it is determined that the latency threshold has been exceeded, then it is determined whether or not storing the subset of data at an alternative database node other than the further database node could ensure that a subsequently measured latency does not exceed the latency threshold. If so, then the data is stored at the alternative database node. |
