On Tue, Jan 3, 2012 at 4:11 AM, Stuti Awasthi <stutiawas...@hcl.com> wrote:
> Hi all,**** > > ** ** > > Wish you all a very Happy New Year.**** > > ** ** > > As I know that files once written in Hadoop are immutable. I can’t edit > the files in Apache distribution of Hadoop.**** > > I tried with MapR distribution and I am able to edit, replace the files > with this distribution.**** > > ** ** > > I wanted to know does CDH3 also support file edit,replace functionality as > normally done with NFS. > HDFS (whether it comes from Apache or vendors like Cloudera or Hortonworks who try to resell it) is architecturally incapable of random read-write. NFS support requires random read-write capability, and thus HDFS cannot support NFS. This is the same reason why you've also noticed funky behavior when you used the FUSE interface (re: your earlier posts). I think if you want NFS and Hadoop together, MapR is the only distribution that supports MapR. Of course, there are many other advantages to using MapR apart from just NFS, but that's another story. > **** > > ** ** > > Please suggest.**** > > Thanks**** > > ** ** > > ** ** > > Regards,**** > > *Stuti Awasthi* > > HCL Comnet Systems and Services Ltd**** > > F-8/9 Basement, Sec-3,Noida.**** > > ** ** > > ------------------------------ > ::DISCLAIMER:: > > ----------------------------------------------------------------------------------------------------------------------- > > The contents of this e-mail and any attachment(s) are confidential and > intended for the named recipient(s) only. > It shall not attach any liability on the originator or HCL or its > affiliates. Any views or opinions presented in > this email are solely those of the author and may not necessarily reflect > the opinions of HCL or its affiliates. > Any form of reproduction, dissemination, copying, disclosure, > modification, distribution and / or publication of > this message without the prior written consent of the author of this > e-mail is strictly prohibited. If you have > received this email in error please delete it and notify the sender > immediately. Before opening any mail and > attachments please check them for viruses and defect. > > > ----------------------------------------------------------------------------------------------------------------------- >
