Output is quite a bit simpler than input because all we do is write a
single stream of bytes with no seeking ("append only"), and it's done
with only one thread, so I don't think there'd be much to gain by
using the newer IO APIs for writing...Mike McCandless http://blog.mikemccandless.com On Fri, Jun 28, 2013 at 2:23 AM, Jeffery Wang <jeffery.w...@morningstar.com> wrote: > > I have checked the FSDirectory, it will create "MMapDirectory" or > "NIOFSDirectory" for Directory. > This two directory only supply IndexInput extend for read file > (MMapIndexInput extends ByteBufferIndexInput), > why not there is not MMap/NIO IndexOutput extend for file write. It only use > FSIndexOutput for file write(FSIndexOutput extends BufferedIndexOutput). > > Does FSIndexOutput wirte file very slow than MMap/NIO? How to improve the IO > write performance. > > Thanks, > __________________________________________________________________________________________ > Jeffery Wang > Application Service - Backend > Morningstar (Shenzhen) Ltd. > Morningstar. Illuminating investing worldwide. > +86 755 3311 0220 Office > +86 130 7782 2813 Mobile > jeffery.w...@morningstar.com<mailto:jeffery.w...@morningstar.com> > This e-mail contains privileged and confidential information and is intended > only for the use of the person(s) named above. Any dissemination, > distribution or duplication of this communication without prior written > consent from Morningstar is strictly prohibited. If you received this message > in error please contact the sender immediately and delete the materials from > any computer. >
