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My aim is is not redundancy but rather something akin to a file-level version of RAID-0. I have two basic goals

  • to increase overall performance using multiple connection threads. I'm often working in a location that has a decent overall bandwidth but low speeds per thread.
  • have a single "point of entry" on the local system that has the total capacity of its parts. ie, combining (4) 2.5GB WebDAV accounts into a single 10GB unit of storage.

Can this be achieved?

OS: Debian

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1 Answer 1

Use "Unionfs". (See http://www.fsl.cs.sunysb.edu/project-unionfs.html)

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Thanks, your answer has got me headed in the right direction but after a few days of playing, I still don't have a complete solution. In researching UnionFS, i saw discussions of aufs, mhddfs, and the newer overlayfs. Aufs specifically mentioned the ability to balance writing over multiple branches so it seemed most suitable, plus there is a fair amount of negative discussion regarding UnionFS. After mounting 4 WebDAV points i attempt to create a union with "sudo mount -t aufs -o br=/mnt/dav/dav000://mnt/dav/dav001:/mnt/dav/dav002:/mnt/dav/dav003 none /mnt/dav/union" but this errors out. –  user30441 Feb 12 '13 at 1:25
    
This is the error I get: mount: wrong fs type, bad option, bad superblock on none, missing codepage or helper program, or other error (for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program) In some cases useful info is found in syslog - try dmesg | tail or so –  user30441 Feb 12 '13 at 1:25
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