That is correct if you do not manually exit NN safemode. Regards
Chen On Jan 30, 2013 8:59 AM, "Jean-Marc Spaggiari" <jean-m...@spaggiari.org> wrote: > Hi Nan, > > When the Namenode will EXIT the safemode, you, you can assume that all > blocks ARE fully replicated. If the Namenode is still IN safemode that > mean that all blocks are NOT fully replicated. > > JM > > 2013/1/29, Nan Zhu <zhunans...@gmail.com>: > > So, we can assume that all blocks are fully replicated at the start > point of > > HDFS? > > > > Best, > > > > -- > > Nan Zhu > > School of Computer Science, > > McGill University > > > > > > > > On Tuesday, 29 January, 2013 at 10:50 PM, Chen He wrote: > > > >> Hi Nan > >> > >> Namenode will stay in safemode before all blocks are replicated. During > >> this time, the jobtracker can not see any tasktrackers. (MRv1). > >> > >> Chen > >> > >> On Tue, Jan 29, 2013 at 9:04 PM, Nan Zhu <zhunans...@gmail.com > >> (mailto:zhunans...@gmail.com)> wrote: > >> > Hi, all > >> > > >> > I'm wondering if HDFS is stopped, and some of the machines of the > >> > cluster are moved, some of the block replication are definitely lost > >> > for moving machines > >> > > >> > when I restart the system, will the namenode recalculate the data > >> > distribution? > >> > > >> > Best, > >> > > >> > -- > >> > Nan Zhu > >> > School of Computer Science, > >> > McGill University > >> > > >> > > >> > > > > >
