[PVE-User] Backup size

VIDAL, Thomas (Bioversity-France) t.vidal at cgiar.org
Mon Apr 7 09:40:29 CEST 2014


Hi all,

No changes, same size for backup. I will search other solutions. And of 
course will be back if I find something.

Have a nice day.

Thomas


On 04/04/2014 18:30, Gilles Mocellin wrote:
> Le 04/04/2014 18:12, VIDAL, Thomas (Bioversity-France) a écrit :
>> I will try Diaolin solution with zero.file.
>> I will let you know on monday.
>>
>> Thanks in all the cases
>>
>> Thomas
>
> For information, the package zerofree handle that case better than 
> filing the whole filesystem with a file.
>
> # LANG=C aptitude show zerofree
> Package: zerofree
> New: yes
> State: not installed
> Version: 1.0.2-1
> Priority: extra
> Section: admin
> Maintainer: Thibaut Paumard <paumard at users.sourceforge.net>
> Architecture: amd64
> Uncompressed Size: 14.3 k
> Depends: e2fslibs (>= 1.37), libc6 (>= 2.3.4)
> Description: zero free blocks from ext2, ext3 and ext4 file-systems
>  Zerofree finds the unallocated blocks with non-zero value content in 
> an ext2, ext3 or ext4 file-system and fills them with zeroes (zerofree 
> can also work with another value
>  than zero). This is mostly useful if the device on which this 
> file-system resides is a disk image. In this case, depending on the 
> type of disk image, a secondary utility may
>  be able to reduce the size of the disk image after zerofree has been 
> run. Zerofree requires the file-system to be unmounted or mounted 
> read-only.
>
>  The usual way to achieve the same result (zeroing the unused blocks) 
> is to run "dd" do create a file full of zeroes that takes up the 
> entire free space on the drive, and then
>  delete this file. This has many disadvantages, which zerofree 
> alleviates:
>  * it is slow;
>  * it makes the disk image (temporarily) grow to its maximal extent;
>  * it (temporarily) uses all free space on the disk, so other 
> concurrent write actions may fail.
>
>  Zerofree has been written to be run from GNU/Linux systems installed 
> as guest OSes inside a virtual machine. If this is not your case, you 
> almost certainly don't need this
>  package. (One other use case would be to erase sensitive data a 
> little bit more securely than with a simple "rm").
> Homepage: http://intgat.tigress.co.uk/rmy/uml/index.html
>
>
>
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-- 

  
Thomas VIDAL (t.vidal at cgiar.org)
Computer Technology Department
  
BANANAS BIOVERSITY
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