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James Clampffer updated HDFS-10796: ----------------------------------- Resolution: Fixed Status: Resolved (was: Patch Available) Committed to HDFS-8707. Thanks for the reviews [~xiaowei.zhu]! > libhdfs++: rationalize ioservice interactions > --------------------------------------------- > > Key: HDFS-10796 > URL: https://issues.apache.org/jira/browse/HDFS-10796 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: hdfs-client > Reporter: Bob Hansen > Assignee: James Clampffer > Attachments: HDFS-10796.HDFS-8707.000.patch > > > Firstly, we should be pulling the number of threads from options.io_threads > (which should default to std::thread::hardware_concurrency()). The library > should pass all tests always with io_threads set to 1 or to <a very high > number> > Secondly, we should have _a_ constructor where the consumer doesn't need to > manage the IOService explicitly, and the FileSystemImpl should create its own > internally. > Since the FileSystem is defined as being for a particular user/identity, > there is a valid use case for the consumer to be constructing many FileSystem > instances to represent many authenticated users in the same process, but want > to share resources (notably have a single io_service shared amongst them > all). In this case, the consumer would want to own the IOService and pass > the same instance to multiple FileSystem instances. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org