>>>>> On Wed, 05 Jul 2006 01:14:48 +0200, Daniel Bloemer said:
> 
> Hi,
> 
> I am a bit confused about the handling of file sizes while using
> "Storage Type = File" for the sd.
> 
> The following two options are clear, they limit the size of the volumes,
> if they are not limited by the hardware.
> 
> 1. A record in the Storage daemon"s Device resource
>     "Maximum Volume Size"
>  
>  2. A record in the Director"s Pool resource
>     "Maximum Volume Bytes" (so much for consistency)
>  
> 
> Then I found this in the documentation:
> 
> Maximum File Size = size
>   No more than size bytes will be written into a given logical file on
> the volume. Once this size is reached, an end of file mark is written on
> the volume and subsequent data are written into the next file. Breaking
> long sequences of data blocks with file marks permits quicker
> positioning to the start of a given stream of data and can improve
> recovery from read errors on the volume. The default is one Gigabyte.
> 
> According to this entry in the documentation I would expect bacula to
> split a Volume limited by "Maximum Volume Bytes" in size into physical
> files limited by "Maximum File Size" on my harddisc. 
> While testing the backup-system I changed this parameter without any
> visible effect. I have created new volumes after changing the parameter,
> to make the change effective.
> 
> Can someone enlighten me about this?

It's a confusion about the word "file" -- the "logical file" mentioned above
is a chunk of bytes within the volume.

With Bacula's tape volumes, each logical file is represented using what is
traditionally called a "file" on the tape.

With Bacula's file volumes, a single operating system file is used for the
whole volume and its size is limited by "Maximum Volume Bytes/Size".  There is
only one logical file within the file volume.

__Martin

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