[Box Backup-dev] ProtocolUncertainStream error

[Chris Wilson]

Hi Pete,

On Thu, 7 Aug 2008, Peter Jalajas, GigaLock Backup Services wrote:

> I tried s3fs first (cuz it is open-source), but it couldn't keep up at
> all.  So I broke down and bought jungledisk plus.
> 
> What's disappointing, and hopefully instructive, is that it worked
> perfectly for hours and hours with about 40 GB of data flying in via a
> FiOS line at 1.2Mbps.  Do maybe I have 1 bad file that I need to
> manipulate or delete or something?

I think diffing against existing files is completely broken on Jungle 
Disks because of this behaviour.

> I'll also submit a ticket to jungledisk pointing to the box backup
> code that's failing:

I don't think that will tell him anything. The relevant code, if it means 
anything at all to him, is at:

http://www.boxbackup.org/trac/browser/box/trunk/bin/bbstored/BackupStoreContext.cpp

around line 470, where it open the file twice, the first time creating it 
(and keeping it open) and the second time for reading.

If he decides not to change this behaviour of Jungle Disk, then we'd have 
to rewrite this algorithm.

Cheers, Chris.
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