Re: Data Deduplication with the help of an online filesystem check

[Tomasz Chmielewski <mangoo@wpkg.org>]

Thomas Glanzmann schrieb:

> 300 Gbyte of used storage of several productive VMs with the following
> Operatings systems running:
> \begin{itemize}
>         \item Red Hat Linux 32 and 64 Bit (Release 3, 4 and 5)
>         \item SuSE Linux 32 and 64 Bit (SLES 9 and 10)
>         \item Windows 2003 Std. Edition 32 Bit
>         \item Windows 2003 Enterprise Edition 64 Bit
> \end{itemize}
> \begin{tabular}{r|r|r|l}
> blocksize & Deduplicated Data \\
> \hline
> 128k      &  29.9 G \\
>  64k      &  41.3 G \\
>  32k      &  59.2 G \\
>  16k      &  82   G \\
>   8k      & 112   G \\
> \
> 
> Bottom line with 8 K blocksize you can get more than 33% of deduped data
> running a productive set of VMs.

Did you just compare checksums, or did you also compare the data "bit 
after bit" if the checksums matched?


-- 
Tomasz Chmielewski