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    • 9. 发明申请
    • CACHED DATA REPURPOSING
    • 缓存数据重现
    • WO2017205787A1
    • 2017-11-30
    • PCT/US2017/034753
    • 2017-05-26
    • HOME BOX OFFICE, INC.
    • GAY, Allen Arthur
    • G06F12/00G06F17/30G06F12/0871
    • The described technology is directed towards repurposing expired cached data when no unexpired data is available. Cached, unexpired data is used in response to a request when such data exists. If such data does not exist, e.g., at a front-end data service, then an attempt to obtain the requested data from another (e.g., back-end) data service is made. If the attempt is unsuccessful, and expired cached data exists, the expired cached data is returned in response to the request, e.g., instead of returning an error. A back-end data service may similarly return expired cached data when unable to obtain unexpired requested data elsewhere. An emergency mode may be entered in which data, whether expired or not, is returned from a cache when such data exists, such as when an attempt to obtain the data elsewhere is known in advance to be futile.
    • 所描述的技术旨在当没有未到期的数据可用时重新调整过期的高速缓存的数据。 当数据存在时,缓存的未过期数据用于响应请求。 如果这种数据不存在,例如在前端数据服务处,则尝试从另一个(例如,后端)数据服务获得所请求的数据。 如果尝试失败并且存在过期的缓存数据,则响应于该请求返回到期的缓存数据,例如,而不是返回错误。 如果后端数据服务无法在其他地方获得未到期的请求数据,则可能会返回过期的缓存数据。 当存在这样的数据时,例如当试图在别处获得数据事先知道是徒劳的时,可以输入紧急模式,其中数据(无论是否过期)从高速缓存返回。