Re: [Duplicity-talk] Volsize

[Tim Riemenschneider]

Peter Schuller schrieb:
>> Are there particular pros/cons with using a small or large volsize?
>> With mixing small and large volsizes?
>>
>> My guess is that bigger volsize reduces metadata overhead and/or it
>> makes each volume zip smaller.  The downside is that you use more
>> tempspace?
>>     
>
> (*) You do use more tempspace.  
>
> (*) Re-tries happen at the full volume level, so if uploads/downloads
> are unreliable, large volume sizes may be difficult (if a single
> transfer never is able to finish).
>
> (*) On the other hand, larger volume sizes may be faster to
> upload/download, allowing TCP to reach full speed. For example with S3
> I have observed a relatively slow ramp-up, so a larger volume size
> means a higher average speed.
>
> (*) Ditto when the per-file overhead is large, such as with sftp.
>   
(*) when restoring a single file the bandwidth overhead is larger (as
whole volumes have to be transfered)