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Top Forums UNIX for Beginners Questions & Answers UNIX and HDFS - file systems on same partition. Post 302971699 by Narendra Eliset on Sunday 24th of April 2016 01:39:20 PM

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04-24-2016

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UNIX and HDFS - file systems on same partition.

I am learning Hadoop. As a part of that, Hdfs - Hadoop distributed file system has commands similar to unix where we can create,copy,move files from unix/linux file system to HDFS.
My question is
1) how two file systems (unix and hdfs) can coexist on thr same partition..
2)What if block used by one FS is overwritten/ modified by another FS.
3) Who does this block handling mechanism inorder to avoid unwanted results.
4) what happens to inodes(unix) pointing to data blocks being used/blocked by HDFS.
Please explain what happens at atomic level when mutiple file systems coexists on same partition.

Narendra Eliset

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LEARN ABOUT REDHAT

mkfs.bfs

MKFS.BFS(8)						       System Administration						       MKFS.BFS(8)

NAME

       mkfs.bfs - make an SCO bfs filesystem

SYNOPSIS

       mkfs.bfs [options] device [block-count]

DESCRIPTION

       mkfs.bfs creates an SCO bfs filesystem on a block device (usually a disk partition or a file accessed via the loop device).

       The block-count parameter is the desired size of the filesystem, in blocks.  If nothing is specified, the entire partition will be used.

OPTIONS

       -N, --inodes number
	      Specify  the  desired  number  of  inodes (at most 512).	If nothing is specified, some default number in the range 48-512 is picked
	      depending on the size of the partition.

       -V, --vname label
	      Specify the volume label.  I have no idea if/where this is used.

       -F, --fname name
	      Specify the filesystem name.  I have no idea if/where this is used.

       -v, --verbose
	      Explain what is being done.

       -c     This option is silently ignored.

       -l     This option is silently ignored.

       -h, --help
	      Display help text and exit.

       -V, --version
	      Display version information and exit.  Option -V only works as --version when it is the only option.

EXIT CODES

       The exit code returned by mkfs.bfs is 0 when all went well, and 1 when something went wrong.

SEE ALSO

       mkfs(8)

AVAILABILITY

       The mkfs.bfs command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux							     July 2011							       MKFS.BFS(8)