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Jason Kace commented on HADOOP-13144: ------------------------------------- One solution is to allow each user + remote address to utilize multiple connection threads. This will require reconfiguration of the Client class to permit a pool of connections per ConnectionId. An alternative solution is to create multiple ConnectionIds per user + remote address. The current {{ConnectionId}} class does not support multiple hashCodes per user + remote address. The {{ConnectionId}} can either be modified or made visible (attached solution) for inheritance. Our use case for this feature requires a single user to be able to issue a large number of RPC requests to a single NN via the IPC client. Better throughput is required in the existing IPC client to allow up to 100k requests/second from the same user to the same remote address. > Enhancing IPC client throughput via multiple connections per user > ----------------------------------------------------------------- > > Key: HADOOP-13144 > URL: https://issues.apache.org/jira/browse/HADOOP-13144 > Project: Hadoop Common > Issue Type: Improvement > Components: ipc > Reporter: Jason Kace > Priority: Minor > Fix For: 2.8.0 > > > The generic IPC client ({{org.apache.hadoop.ipc.Client}}) utilizes a single > connection thread for each {{ConnectionId}}. The {{ConnectionId}} is unique > to the connection's remote address, ticket and protocol. Each ConnectionId > is 1:1 mapped to a connection thread by the client via a map cache. > The result is to serialize all IPC read/write activity through a single > thread for a each user/ticket + address. If a single user makes repeated > calls (1k-100k/sec) to the same destination, the IPC client becomes a > bottleneck. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org