公开(公告)号：US10387416B2

公开(公告)日：2019-08-20

申请号：US14080552

申请日：2013-11-14

Applicant: Facebook, Inc.

Inventor： Mayank Agarwal ,  Dhrubajyoti Borthakur ,  Nagavamsi Ponnekanti ,  Haobo Xu

IPC: G06F16/30 ,  G06F16/2455

Abstract: Technology is disclosed for retrieving data from a specific storage layer of a storage system (“the technology”). A query application programming interface (API) is provided that allows an application to specify a storage layer on which the query should be executed. The query API can be used in a multi-threaded environment which employs a combination of fast threads and slow threads to serve read/write requests from applications. The fast threads are configured to query on a first set of storage layers, e.g., storage layers in a primary storage, while the slow threads are configured to query on a second set of storage layers, e.g., storage layers in a secondary storage. If a fast thread does not find the requested data in the first set, the request is transferred to a slow thread and the fast thread is allocated to another request while the slow thread is serving the current request.

公开(公告)号：US20150134692A1

公开(公告)日：2015-05-14

申请号：US14080552

申请日：2013-11-14

Applicant: Facebook, Inc.

Inventor： Mayank Agarwal ,  Dhrubajyoti Borthakur ,  Nagavamsi Ponnekanti ,  Haobo Xu

IPC: G06F17/30

CPC classification number: G06F16/2455

Abstract: Technology is disclosed for retrieving data from a specific storage layer of a storage system (“the technology”). A query application programming interface (API) is provided that allows an application to specify a storage layer on which the query should be executed. The query API can be used in a multi-threaded environment which employs a combination of fast threads and slow threads to serve read/write requests from applications. The fast threads are configured to query on a first set of storage layers, e.g., storage layers in a primary storage, while the slow threads are configured to query on a second set of storage layers, e.g., storage layers in a secondary storage. If a fast thread does not find the requested data in the first set, the request is transferred to a slow thread and the fast thread is allocated to another request while the slow thread is serving the current request.

Abstract translation: 公开了用于从存储系统的特定存储层（“该技术”）检索数据的技术。 提供了一种查询应用程序编程接口（API），允许应用程序指定应在其上执行查询的存储层。 查询API可以在多线程环境中使用，该环境采用快速线程和慢线程的组合来提供来自应用程序的读/写请求。 快速线程被配置为在第一组存储层（例如主存储器中的存储层）中查询，而慢线程被配置为在第二组存储层（例如，辅助存储器中的存储层）上进行查询。 如果快速线程没有在第一组中找到所请求的数据，则该请求被传送到慢速线程，并且快速线程被分配给另一个请求，而慢线程服务于当前请求。