Hi Lohit, Some of our customers are running Hadoop 1.3, and they run distcp to transfer data via webhdfs in production.
We use distcp to transfer data between Hadoop 1.x and Hadoop 2.x. As far as I know webhdfs is the most reliable way to transfer data between secure and insecure clusters across different Hadoop versions. ~Haohui On Tue, Nov 26, 2013 at 1:51 PM, lohit <lohit.vijayar...@gmail.com> wrote: > Curious to know usage of webhdfs for Hadoop 1.0. Are people using it in > production? > Reason I ask is because we use lot of hftp to transfer data between Hadoop > 1.0 and Hadoop 2.0 as of today. > Removing hftp would mean that anyone using Hadoop 1.0 and Hadoop 3.0 would > have to move to webhdfs, right? > > > > 2013/11/26 Suresh Srinivas <sur...@hortonworks.com> > > > Thanks Haohui for all your hard work in this area. I am +1 on this > > proposal. > > > > > > On Tue, Nov 26, 2013 at 12:50 PM, Haohui Mai <h...@hortonworks.com> > wrote: > > > > > Hi, > > > > > > Recently I've been focusing on fixing hftp / hsftp / webhdfs / swebhdfs > > in > > > various set ups. Now we have reached the state that all the above file > > > systems can work in both secure and insecure clusters, and transfer > data > > > through both http and https. > > > > > > Taking a step back, these file systems are very similar, and I'm > > wondering > > > whether it is a good time to deprecate hftp and hsftp in Hadoop right > > now. > > > > > > The main reason is that hftp / hsftp only provides a strict subset of > > > functionalities that webhdfs / swebhdfs offer. Notably, webhdfs / > > swebhdfs > > > support writes and HA which hftp / hsftp do not support. It's more > > natural > > > to move forward with webhdfs / swebhdfs, keeping both hftp / hsftp > around > > > seems introducing more work. > > > > > > Another reason is that webhdfs has been supported since Hadoop 1, thus > > > getting rid of hftp / hsftp does not seem removing any features, even > the > > > users are trying to migrate from Hadoop 1 to Hadoop 2. > > > > > > > > > Your ideas are appreciated. > > > > > > Thanks, > > > Haohui > > > > > > -- > > > CONFIDENTIALITY NOTICE > > > NOTICE: This message is intended for the use of the individual or > entity > > to > > > which it is addressed and may contain information that is confidential, > > > privileged and exempt from disclosure under applicable law. If the > reader > > > of this message is not the intended recipient, you are hereby notified > > that > > > any printing, copying, dissemination, distribution, disclosure or > > > forwarding of this communication is strictly prohibited. If you have > > > received this communication in error, please contact the sender > > immediately > > > and delete it from your system. Thank You. > > > > > > > > > > > -- > > http://hortonworks.com/download/ > > > > -- > > CONFIDENTIALITY NOTICE > > NOTICE: This message is intended for the use of the individual or entity > to > > which it is addressed and may contain information that is confidential, > > privileged and exempt from disclosure under applicable law. If the reader > > of this message is not the intended recipient, you are hereby notified > that > > any printing, copying, dissemination, distribution, disclosure or > > forwarding of this communication is strictly prohibited. If you have > > received this communication in error, please contact the sender > immediately > > and delete it from your system. Thank You. > > > > > > -- > Have a Nice Day! > Lohit > -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
