Hi Roopa,
Firstly, can you get the fuse-dfs working for an instance HDFS?
There is also a debug mode for fuse: enable this by adding -d on the
command line.
C
Roopa Sudheendra wrote:
Hey Craig,
I tried the way u suggested..but i get this transport endpoint not
connected. Can i see the logs anywhere? I dont see anything in
/var/log/messages either
looks like it tries to create the file system in hdfs.c but not sure
where it fails.
I have the hadoop home set so i believe it gets the config info.
any idea?
Thanks,
Roopa
On Jan 28, 2009, at 1:59 PM, Craig Macdonald wrote:
In theory, yes.
On inspection of libhdfs, which underlies fuse-dfs, I note that:
* libhdfs takes a host and port number as input when connecting, but
not a scheme (hdfs etc). The easiest option would be to set the S3 as
your default file system in your hadoop-site.xml, then use the host
of "default". That should get libhdfs to use the S3 file system. i.e.
set fuse-dfs to mount dfs://default:0/ and all should work as planned.
* libhdfs also casts the FileSystem to a DistributedFileSystem for
the df command. This would fail in your case. This issue is currently
being worked on - see HADOOP-4368
https://issues.apache.org/jira/browse/HADOOP-4368.
C
Roopa Sudheendra wrote:
Thanks for the response craig.
I looked at fuse-dfs c code and looks like it does not like anything
other than "dfs:// " so with the fact that hadoop can connect to S3
file system ..allowing s3 scheme should solve my problem?
Roopa
On Jan 28, 2009, at 1:03 PM, Craig Macdonald wrote:
Hi Roopa,
I cant comment on the S3 specifics. However, fuse-dfs is based on a
C interface called libhdfs which allows C programs (such as
fuse-dfs) to connect to the Hadoop file system Java API. This being
the case, fuse-dfs should (theoretically) be able to connect to any
file system that Hadoop can. Your mileage may vary, but if you find
issues, please do report them through the normal channels.
Craig
Roopa Sudheendra wrote:
I am experimenting with Hadoop backed by Amazon s3 filesystem as
one of our backup storage solution. Just the hadoop and s3(block
based since it overcomes the 5gb limit) so far seems to be fine.
My problem is that i want to mount this filesystem using fuse-dfs
( since i don't have to worry about how the file is written on the
system ) . Since the namenode does not get started with s3 backed
hadoop system how can i connect fuse-dfs to this setup.
Appreciate your help.
Thanks,
Roopa
