Astropulse server problem?

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Message 1333735 - Posted: 2 Feb 2013, 1:23:16 UTC

Does the server handling downloads of the Astropulse 8 MB
.wu input files have a problem? I've found that, in order
to finish downloading one in less than 5 or 6 days, I have
to manually request retries on it many times. The download
speed is typically below 5 KBps, except below 10 KBps late
at night.

Uploads of output files from other BOINC projects go much
faster, even if a transatlantic connection is needed.

juan BFP
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Message 1333744 - Posted: 2 Feb 2013, 1:40:14 UTC - in response to Message 1333735.

Don´t know if that answer your question, but the normal MB WU have the size of about 360kB a AP have 8 MB, about 22 times grater. With the actual conection problem in some cases is almost impossible to DL a AP WU. At least that happens at my side of the world even with a retry´s cmd takes about an hour or more to DL a single AP WU.

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Message 1333747 - Posted: 2 Feb 2013, 1:47:57 UTC

I crunch only astropulses and have found the download speeds to be anywhere from a whopping 150KBPS to a dismal 0.1 KBPS. I've found they do eventually get through even if it does take an hour or two :)

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Message 1333880 - Posted: 2 Feb 2013, 8:20:26 UTC

Perhaps it's network config problem, not "AP server" problem.
On my host I see good speed (10k is good these times) right after hitting retry button. But in a few seconds speed decreases to 1-2kb. It stays there for some time then connection breaks and retry needed again.
Adding BOINC client fallbacks of 5 hours and mean processing time for AP task on my host of less than hour it makes absolutely impossible to keep host busy w/o auto-retry script.
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Message 1334072 - Posted: 2 Feb 2013, 20:52:25 UTC

My machine need average 2 - 3 hours for to DL an AP WU (pure DL time).

~ one day, up to 40 or more retries are needed for to finish the AP WU DL.

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Message 1334115 - Posted: 2 Feb 2013, 23:32:57 UTC

Try using a US based proxy.. you should get them downloading pretty quick then. seems like something is throttling coming out of the US as without using ones - endless backoffs and slow <1k/s with a US proxy >10k/s

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Message 1334244 - Posted: 3 Feb 2013, 11:42:15 UTC

Here in the UK, if I don't force retrys, two to three DAYS to download one AP unit. Fortunately I'm a slow cruncher.

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Message 1334588 - Posted: 4 Feb 2013, 14:29:29 UTC

I have not watched an AP task download in a while, but my machines that do run AP tasks have download averages of ~100k.
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Message 1334623 - Posted: 4 Feb 2013, 16:58:52 UTC

It looks as if the AP splitter is not working as well as it should - the same set of tapes being split as when I went off to work this morning, and "stuck" at the same channel numbers.

(No wander there are no new tapes being fed into the system...)
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Message 1334626 - Posted: 4 Feb 2013, 17:16:20 UTC

The result creation rate is rather low since 2 weeks.
But they can add a few other tapes into the pipe of course.
Probably Matt isn`t in the lab yet.
He isn`t an early riser usually.

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Message boards : Number crunching : Astropulse server problem?

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