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公开(公告)号：US09367410B2
公开(公告)日：2016-06-14
申请号：US14484618
申请日：2014-09-12
Applicant: Facebook, Inc.
Inventor： Liyin Tang , Rishit Manit Shroff , Amitanand S. Aiyer , Arjen Roodselaar
CPC classification number: G06F11/2033 , G06F11/1471 , G06F11/2028 , G06F11/2046 , G06F11/2097 , G06F2201/805 , G06F2201/84 , H04L67/1095 , H04L67/1097
Abstract: The disclosure is directed to failover mechanisms in a distributed computing system. A region of data is managed by multiple region servers. One of the region servers is elected as a “leader” and the remaining are “followers.” The leader serves the read/write requests from a client. The leader writes the data received from the client into the in-memory store and a local write-ahead log (“WAL”), and synchronously replicates the WAL to the followers. A region server designated as an “active” region server synchronizes a distributed data store with the data from the WAL. Active witness followers apply the data from the WAL to their in-memory store while shadow witness followers do not. Different types of servers provide failover mechanisms with different characteristics. A leader is elected based on their associated ranks—higher the rank, higher the likelihood of electing itself as a leader.
Abstract translation: 本公开涉及分布式计算系统中的故障切换机制。 数据区域由多个区域服务器管理。 其中一个区域服务器被选为“领导者”，其余的是“追随者”。领导者服务于客户端的读/写请求。 领导者将从客户端收到的数据写入内存中的存储和本地预写日志（“WAL”），同时将WAL复制到关注者。 指定为“活动”区域服务器的区域服务器将分布式数据存储与来自WAL的数据进行同步。 活跃的见证追随者将WAL中的数据应用到内存中，而影子见证追随者则不会。 不同类型的服务器提供具有不同特征的故障切换机制。 一个领导人是根据他们相关的职级选出的 - 排名越高，选举自己作为领导者的可能性就越高。
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公开(公告)号：US20160077936A1
公开(公告)日：2016-03-17
申请号：US14484618
申请日：2014-09-12
Applicant: Facebook, Inc.
Inventor： Liyin Tang , Rishit Manit Shroff , Amitanand S. Aiyer , Arjen Roodselaar
CPC classification number: G06F11/2033 , G06F11/1471 , G06F11/2028 , G06F11/2046 , G06F11/2097 , G06F2201/805 , G06F2201/84 , H04L67/1095 , H04L67/1097
Abstract: The disclosure is directed to failover mechanisms in a distributed computing system. A region of data is managed by multiple region servers. One of the region servers is elected as a “leader” and the remaining are “followers.” The leader serves the read/write requests from a client. The leader writes the data received from the client into the in-memory store and a local write-ahead log (“WAL”), and synchronously replicates the WAL to the followers. A region server designated as an “active” region server synchronizes a distributed data store with the data from the WAL. Active witness followers apply the data from the WAL to their in-memory store while shadow witness followers do not. Different types of servers provide failover mechanisms with different characteristics. A leader is elected based on their associated ranks—higher the rank, higher the likelihood of electing itself as a leader.
Abstract translation: 本公开涉及分布式计算系统中的故障切换机制。 数据区域由多个区域服务器管理。 其中一个区域服务器被选为“领导者”，其余的是“追随者”。领导者服务于客户端的读/写请求。 领导者将从客户端收到的数据写入内存中的存储和本地预写日志（“WAL”），同时将WAL复制到关注者。 指定为“活动”区域服务器的区域服务器将分布式数据存储与来自WAL的数据进行同步。 活跃的见证追随者将WAL中的数据应用到内存中，而影子见证追随者则不会。 不同类型的服务器提供具有不同特征的故障切换机制。 一个领导人是根据他们相关的职级选出的 - 排名越高，选举自己作为领导者的可能性就越高。
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公开(公告)号：US09983957B2
公开(公告)日：2018-05-29
申请号：US15152769
申请日：2016-05-12
Applicant: Facebook, Inc.
Inventor： Liyin Tang , Rishit Manit Shroff , Amitanand S. Aiyer , Arjen Roodselaar
CPC classification number: G06F11/2033 , G06F11/1471 , G06F11/2028 , G06F11/2046 , G06F11/2097 , G06F2201/805 , G06F2201/84 , H04L67/1095 , H04L67/1097
Abstract: The disclosure is directed to failover mechanisms in a distributed computing system. A region of data is managed by multiple region servers. One of the region servers is elected as a “leader” and the remaining are “followers.” The leader serves the read/write requests from a client. The leader writes the data received from the client into the in-memory store and a local write-ahead log (“WAL”), and synchronously replicates the WAL to the followers. A region server designated as an “active” region server synchronizes a distributed data store with the data from the WAL. Active witness followers apply the data from the WAL to their in-memory store while shadow witness followers do not. Different types of servers provide failover mechanisms with different characteristics. A leader is elected based on their associated ranks—higher the rank, higher the likelihood of electing itself as a leader.
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公开(公告)号：US20160253249A1
公开(公告)日：2016-09-01
申请号：US15152769
申请日：2016-05-12
Applicant: Facebook, Inc.
Inventor： Liyin Tang , Rishit Manit Shroff , Amitanand S. Aiyer , Arjen Roodselaar
CPC classification number: G06F11/2033 , G06F11/1471 , G06F11/2028 , G06F11/2046 , G06F11/2097 , G06F2201/805 , G06F2201/84 , H04L67/1095 , H04L67/1097
Abstract: The disclosure is directed to failover mechanisms in a distributed computing system. A region of data is managed by multiple region servers. One of the region servers is elected as a “leader” and the remaining are “followers.” The leader serves the read/write requests from a client. The leader writes the data received from the client into the in-memory store and a local write-ahead log (“WAL”), and synchronously replicates the WAL to the followers. A region server designated as an “active” region server synchronizes a distributed data store with the data from the WAL. Active witness followers apply the data from the WAL to their in-memory store while shadow witness followers do not. Different types of servers provide failover mechanisms with different characteristics. A leader is elected based on their associated ranks—higher the rank, higher the likelihood of electing itself as a leader.
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