[volunteergrid2-l] Long cycle times

Shawn Willden shawn at willden.org
Thu Sep 22 17:02:28 PDT 2011


On Thu, Sep 22, 2011 at 1:19 PM, Marco Tedaldi <marco.tedaldi at gmail.com>wrote:

> I see that with about 300GB of
> data my server would only be checking that stuff the whole day long.
>

Yep.  But the reason it's slow is that Tahoe does the checks at a very low
rate, in order to avoid interfering with any other processing.  The checks
require very little I/O or CPU, but it was found that running them at full
speed caused short but painful slowdowns.  So instead the checks are
throttled to a very low rate.


> Is it normal, that the checks take that long? Can I speed this up? Will
> there be problems, if the check takes longer than the time between two
> checks?


Nope.  GC will just run less often -- which is fine, frankly.  It could
really run once a week or even less unless your server is close to full.
 And if it's close to fully you likely have bigger problems.

-- 
Shawn
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