Yes, as I wrote. You can't use root as user for writing, root (or superuser) has another context in hdfs. Just change into hdfs (su - hdfs) and try again. For all user who should have access to the mounted fs you should create a group and chown them in hdfs (maybe /tmp/group or similar)
best, Alex On Apr 26, 2012, at 2:53 PM, Manu S wrote: > Yeah Alex, I tried. But still I am not able to make it > > [root@namenode ~]# echo "hadoop-fuse-dfs#dfs://namenode:8020 /hdfs_mount fuse > usetrash,rw 0 0" >> /etc/fstab > [root@namenode ~]# mount -a > INFO fuse_options.c:162 Adding FUSE arg /hdfs_mount > > [root@namenode ~]# mount | grep fuse > fuse on /hdfs_mount type fuse > (rw,nosuid,nodev,allow_other,default_permissions) > > [root@namenode ~]# ls -ld /hdfs_mount/ > drwxrwxr-x 11 nobody nobody 4096 Apr 9 12:34 /hdfs_mount/ > [root@namenode ~]# touch /hdfs_mount/file > touch: cannot touch `/hdfs_mount/file': Permission denied > > > > On Thu, Apr 26, 2012 at 6:09 PM, alo alt <wget.n...@googlemail.com> wrote: > Manu, > > did you mount hdfs over fstab: > > hadoop-fuse-dfs#dfs://namenode.local:<PORT> /hdfs-mount fuse usetrash,rw 0 0" > ? > > You could that do with: > "mkdir -p /hdfs-mount && chmod 777 /hdfs-mount && echo > "hadoop-fuse-dfs#dfs://NN.URI:<PORT> /hdfs-mount fuse usetrash,rw 0 0" >> > /etc/fstab && mount -a ; mount" > > > - Alex > > > On Apr 26, 2012, at 2:00 PM, Manu S wrote: > >> Thanks a lot Alex. >> >> Actually I didn't tried the NFS option, as I am trying to sort out this >> hadoop-fuse mounting issue. >> I can't change the ownership of mount directory after hadoop-fuse mount. >> >> [root@namenode ~]# ls -ld /hdfs_mount/ >> drwxrwxr-x 11 nobody nobody 4096 Apr 9 12:34 /hdfs_mount/ >> >> [root@namenode ~]# chown hdfs /hdfs_mount/ >> chown: changing ownership of `/hdfs_mount/': Input/output error >> >> Any ideas? >> >> >> On Thu, Apr 26, 2012 at 4:26 PM, alo alt <wget.n...@googlemail.com> wrote: >> Hi, >> >> I wrote a small writeup about: >> http://mapredit.blogspot.de/2011/11/nfs-exported-hdfs-cdh3.html >> >> As you see, the FS is mounted as nobody and you try as root. Change the >> permissions in your hdfs: >> hadoop -dfs chmod / chown .... >> >> - Alex >> >> -- >> Alexander Lorenz >> http://mapredit.blogspot.com >> >> On Apr 26, 2012, at 12:50 PM, Manu S wrote: >> >>> Dear All, >>> >>> I have installed *Hadoop-fuse* to mount the HDFS filesystem locally . I >>> could mount the HDFS without any issues.But I am not able to do any file >>> operations like *delete, copy, move* etc directly. The directory ownership >>> automatically changed to *nobody:nobody* while mounting. >>> >>> *[root@namenode ~]# ls -ld /hdfs_mount/ >>> drwxr-xr-x 2 root root 4096 Apr 3 16:22 /hdfs_mount/ >>> >>> [root@namenode ~]# hadoop-fuse-dfs dfs://namenode:8020 /hdfs_mount/** ** >>> INFO fuse_options.c:162 Adding FUSE arg /hdfs_mount/ >>> >>> [root@namenode ~]# ls -ld /hdfs_mount/* * >>> drwxrwxr-x 10 nobody nobody 4096 Apr 5 13:22 /hdfs_mount/* >>> >>> I tried the same with *pseudo-distributed node*,but its working fine. I can >>> do any normal file operations after mounting the HDFS. >>> >>> Appreciate your help on the same. >>> >>> -- >>> Thanks & Regards >>> ---- >>> *Manu S* >>> SI Engineer - OpenSource & HPC >>> Wipro Infotech >>> Mob: +91 8861302855 Skype: manuspkd >>> www.opensourcetalk.co.in >> >> >> >> >> -- >> Thanks & Regards >> ---- >> Manu S >> SI Engineer - OpenSource & HPC >> Wipro Infotech >> Mob: +91 8861302855 Skype: manuspkd >> www.opensourcetalk.co.in >> >> >> > > > -- > Alexander Lorenz > http://mapredit.blogspot.com > > > > > -- > Thanks & Regards > ---- > Manu S > SI Engineer - OpenSource & HPC > Wipro Infotech > Mob: +91 8861302855 Skype: manuspkd > www.opensourcetalk.co.in > > > -- Alexander Lorenz http://mapredit.blogspot.com
