> On Mar 5, 2018, at 4:08 PM, Andrew Wang <andrew.w...@cloudera.com> wrote: > > - NN on top HDSL where the NN uses the new block layer (Both Daryn and Owen > acknowledge the benefit of the new block layer). We have two choices here > ** a) Evolve NN so that it can interact with both old and new block layer, > ** b) Fork and create new NN that works only with new block layer, the old > NN will continue to work with old block layer. > There are trade-offs but clearly the 2nd option has least impact on the old > HDFS code. > > Are you proposing that we pursue the 2nd option to integrate HDSL with HDFS?
Originally I would have prefered (a); but Owen made a strong case for (b) in my discussions with his last week. Overall we need a broader discussion around the next steps for NN evolution and how to chart the course; I am not locked into any particular path or how we would do it. Let me make a more detailed response in HDFS-10419. sanjay
