公开(公告)号：US20140181030A1

公开(公告)日：2014-06-26

申请号：US14194447

申请日：2014-02-28

Applicant: Metaswitch Networks Ltd

Inventor： Keith WANSBROUGH ,  Alistair DUNDAS

IPC: G06F17/30

CPC classification number: G06F17/30575 ,  G06F17/30144 ,  G06F17/30174

Abstract: Each of a plurality of data items has an associated update time. Identifying updated data items comprises identifying those data items that have an update time later than a last synchronization time. The data items are updated such that each data item is associated with one of a plurality of update tokens. Each update token is associated with updates performed up to a respective bound period from a time at which the update token is superseded by a successive update token. The update tokens are allocated successively in a monotonic sequence. Data indicating a last synchronization time is received. An update token is identified that is associated with one or more updates performed relative to a point in time related to the last synchronization time by the bound period. Data items having an update time after the last synchronization time are identified on the basis of the identified update token.

Abstract translation: 多个数据项中的每一个具有相关联的更新时间。 识别更新的数据项包括识别具有比最后同步时间晚的更新时间的那些数据项。 更新数据项，使得每个数据项与多个更新令牌之一相关联。 每个更新令牌与从更新令牌被连续更新令牌取代的时间到相应的绑定时段执行的更新相关联。 更新令牌以单调序列连续分配。 接收到表示最后同步时间的数据。 识别与相对于与最后同步时间相关的时间点相关联的一个或多个更新相关联的更新令牌。 基于所识别的更新令牌来识别具有在最后同步时间之后的更新时间的数据项。