[tahoe-dev] Proposed short description of tahoe-LAFS for personal backup

[David-Sarah Hopwood]

On 12/06/12 23:44, Saint Germain wrote:
>   - You can also rent storage nodes [from] Least Authority Enterprises

The pricing for LAE is a monthly charge per gigabyte stored; you're not
paying a rental charge for the node.

>   - No delta encoding but has deduplication at the source, however only
>     on a file level.
>   - Works on Linux, Mac OS X and Windows. I have however a few doubts
>     on the Windows compatibility for managing locked files.

On Windows, backup software that is intended to be able to back up or
restore operating system files, needs to be able to bypass locking.
'tahoe backup' (for example) is only intended to be able to back up
application files, and locking isn't really an issue there. (It is
possible on Windows to lock a file against reading by other apps, but
most applications don't do so because that is not what the stdio-level
file APIs do, and it is also not the typical way to use Win32 APIs such
as CreateFile. But if an app *does* lock a file against reading, it's
probably because the file is in an inconsistent state, so there would
not be much point in backing it up at that time anyway.)

On the other hand, the error handling of 'tahoe backup' is a bit weak
and could be improved on all platforms.

-- 
David-Sarah Hopwood ⚥

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