Re: [gentoo-user] rsync + tar + bz2 ?

[Saphirus Sage <saphirus497@gmail.com>]

Hung Dang wrote:
> Dirk Heinrichs wrote:
>> Am Samstag, 7. März 2009 17:04:17 schrieb Grant:
>>  
>>> I'm backing up numerous large files on another machine on my local
>>> network.  I've only been using rsync, but it occured to me that I
>>> might be able to save some time and space if I incorporate tar and
>>> bzip2.  How will rsync interact with those?  If I turn the whole
>>> backup into a big tar.bz2, would rsync need to redownload the whole
>>> thing if I change one file?  If so, maybe I should turn different
>>> groups of files into tar.bz2 archives so rsync only needs to
>>> redownload an archive if one of its files has changed?
>>>     
>>
>> Another way, although a bit more work to setup, whould be to use a
>> "Network block device". Unlike NFS, the server just exports the block
>> device, everything else (mkfs, encryption) can be done on the client.
>>
>> Bye...
>>
>>     Dirk
>>   
> rsync will download only if source and destination files are different.
> From my experiences using rar is faster and save more space  than bz2.
>
> Hung
>
But rar is a proprietary archival format, I'd much sooner go with a tar,
compressed with bzip2 or lzma. If the biggest concern is just getting it
done quickly, gzip it, but for the love of all things free, not rar, I say!