With 6 +1s, 0 0s, and 0 -1s the vote passes. I'll be merging this into trunk shortly.
Thanks everyone who participated in the discussion and vote! And many thanks to everyone who contributed code and feedback throughout the development process! Particularly Bob, Anatoli, Xiaowei and Deepak who provided lots of large pieces of code as well as folks like Owen, Chris D, Allen, and Stephen W who provided various support and guidance with the Apache process and project design. On Wed, Mar 14, 2018 at 1:32 PM, Jitendra Pandey <jiten...@hortonworks.com> wrote: > +1 (binding) > > On 3/14/18, 9:57 AM, "Anu Engineer" <aengin...@hortonworks.com> wrote: > > +1 (binding). Thanks for all the hard work and getting this client > ready. > It is nice to have an official and supported native client for HDFS. > > Thanks > Anu > > On 3/13/18, 8:16 PM, "Mukul Kumar Singh" <msi...@hortonworks.com> > wrote: > > +1 (binding) > > Thanks, > Mukul > > On 14/03/18, 2:06 AM, "Owen O'Malley" <owen.omal...@gmail.com> > wrote: > > +1 (binding) > > .. Owen > > On Sun, Mar 11, 2018 at 6:20 PM, Chris Douglas < > cdoug...@apache.org> wrote: > > > +1 (binding) -C > > > > On Thu, Mar 8, 2018 at 9:31 AM, Jim Clampffer < > james.clampf...@gmail.com> > > wrote: > > > Hi Everyone, > > > > > > The feedback was generally positive on the discussion > thread [1] so I'd > > > like to start a formal vote for merging HDFS-8707 > (libhdfs++) into trunk. > > > The vote will be open for 7 days and end 6PM EST on > 3/15/18. > > > > > > This branch includes a C++ implementation of an HDFS > client for use in > > > applications that don't run an in-process JVM. Right now > the branch only > > > supports reads and metadata calls. > > > > > > Features (paraphrasing the list from the discussion > thread): > > > -Avoiding the JVM means applications that use libhdfs++ > can explicitly > > > control resources (memory, FDs, threads). The driving > goal for this > > > project was to let C/C++ applications access HDFS while > maintaining a > > > single heap. > > > -Includes support for Kerberos authentication. > > > -Includes a libhdfs/libhdfs3 compatible C API as well as a > C++ API that > > > supports asynchronous operations. Applications that only > do reads may be > > > able to use this as a drop in replacement for libhdfs. > > > -Asynchronous IO is built on top of boost::asio which in > turn uses > > > select/epoll so many sockets can be monitored from a > single thread (or > > > thread pool) rather than spawning a thread to sleep on a > blocked socket. > > > -Includes a set of utilities written in C++ that mirror > the CLI tools > > (e.g. > > > ./hdfs dfs -ls). These have a 3 order of magnitude lower > startup time > > than > > > java client which is useful for scripts that need to work > with many > > files. > > > -Support for cancelable reads that release associated > resources > > > immediately. Useful for applications that need to be > responsive to > > > interactive users. > > > > > > Other points: > > > -This is almost all new code in a new subdirectory. No > Java source for > > the > > > rest of hadoop was changed so there's no risk of > regressions there. The > > > only changes outside of that subdirectory were integrating > the build in > > > some of the pom files and adding a couple dependencies to > the DockerFile. > > > -The library has had plenty of burn-in time. It's been > used in > > production > > > for well over a year and is indirectly being distributed > as part of the > > > Apache ORC project (in the form of a third party > dependency). > > > -There isn't much in the way of well formatted > documentation right now. > > > The documentation for the libhdfs API is applicable to the > libhdfs++ C > > API. > > > Header files describe various component including details > about threading > > > and lifecycle expectations for important objects. Good > places to start > > are > > > hdfspp.h, filesystem.h, filehandle.h, rpc_connection.h and > rpc_enginel.h. > > > > > > I'll start with my +1 (binding). > > > > > > [1] > > > http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-dev/ > > 201803.mbox/browser > > > (second message in thread, can't figure out how to link > directly to mine) > > > > > > Thanks! > > > > ------------------------------------------------------------ > --------- > > To unsubscribe, e-mail: hdfs-dev-unsubscribe@hadoop. > apache.org > > For additional commands, e-mail: > hdfs-dev-h...@hadoop.apache.org > > > > > > > > ------------------------------------------------------------ > --------- > To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org > For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org > For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org > > > >
