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Re: [Duplicity-talk] Volsize
From: |
Peter Schuller |
Subject: |
Re: [Duplicity-talk] Volsize |
Date: |
Sat, 3 Jan 2009 14:14:12 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
> 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.
--
/ Peter Schuller
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