A temp fix for our bandwith problems ?

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Message 1168533 - Posted: 6 Nov 2011, 3:59:25 UTC - in response to Message 1168531.  

I dont know what guestimating is. Maybee some flagwaving will explain.
Both you and I know that it is impossible to calculate this.
It was just a silly guess of me.
I think though that this is a non-problem.
Maybe SETI will get their Gigabit Line to campus so everyone will be happy


Guestimating is a portmanteau of "guess" and "estimating".

Even if we can't calculate the actual effect, does it not stand to reason that we shouldn't be abusing the system and/or other users by even a small amount?
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Message 1168536 - Posted: 6 Nov 2011, 4:11:07 UTC - in response to Message 1168533.  
Last modified: 6 Nov 2011, 4:11:32 UTC

Without facts to help us make a determination, there is no direct evidence that any user abuse or DDOS is being caused solely by use of the Retry button.

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Message 1168538 - Posted: 6 Nov 2011, 4:17:40 UTC - in response to Message 1168536.  

So it's completely impossible that even a portion of users or computers have ever been affected by someone hitting the retry button.

Like I said, people will quickly rationalize that their actions don't affect the system and what they are doing isn't hurting anyone else because they don't see it.
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Message 1168544 - Posted: 6 Nov 2011, 4:42:13 UTC - in response to Message 1168533.  

I dont know what guestimating is. Maybee some flagwaving will explain.
Both you and I know that it is impossible to calculate this.
It was just a silly guess of me.
I think though that this is a non-problem.
Maybe SETI will get their Gigabit Line to campus so everyone will be happy


Guestimating is a portmanteau of "guess" and "estimating".

Even if we can't calculate the actual effect, does it not stand to reason that we shouldn't be abusing the system and/or other users by even a small amount?


You are right. Abusing a system is a bad thing.
But there are many users like my self who does not use their computers 24/7 for this project.
I prefer to conclude downloads from SETI by pressing the retry button if necessary when shutting down the system.
I have a long experience using the FTP protocol (25 years) and I am sure (dead sure) that these extra requests are not giving any extra load on the system.
It is exactly what the rescheduler program is doing but in an other time.

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Message 1168546 - Posted: 6 Nov 2011, 4:47:59 UTC - in response to Message 1168538.  

So it's completely impossible that even a portion of users or computers have ever been affected by someone hitting the retry button.

Like I said, people will quickly rationalize that their actions don't affect the system and what they are doing isn't hurting anyone else because they don't see it.



No, not completely impossible. I said there's no direct evidence.

I feel it's more likely that some comm problems are caused by hosts that are in need of work and are repeatedly asking for work. My 6.10.60 pc does that every five minutes. And has been doing that all day, every day since it hasn't been able to fill its 4 day cache. How many hosts are doing that continuously??

Setting NNT or disabling Network Activity will stop those requests.

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Message 1168547 - Posted: 6 Nov 2011, 4:51:29 UTC - in response to Message 1168544.  

You are right. Abusing a system is a bad thing.
But there are many users like my self who does not use their computers 24/7 for this project.
I prefer to conclude downloads from SETI by pressing the retry button if necessary when shutting down the system.


I agree that there's a lot of users who don't leave their computers on 24/7, but that doesn't automatically translate into being required to press the retry button to force downloads through.

During the summertime when the heat is high I usually turn off all my machines during the day. If a download is stuck, it will pick up on its own after I boot my system. I don't need to press retry just to get it to work.

I have a long experience using the FTP protocol (25 years) and I am sure (dead sure) that these extra requests are not giving any extra load on the system.
It is exactly what the rescheduler program is doing but in an other time.


SETI@Home isn't using the FTP protocol though, they are using HTTP via TCP/IP.

And by the way, I have 20 years of experience as a tech, 10 of those as a SysAdmin. I can assure you that these extra requests are having a negative effect on the servers. Dead sure.
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Message 1168549 - Posted: 6 Nov 2011, 4:57:48 UTC - in response to Message 1168546.  
Last modified: 6 Nov 2011, 5:05:45 UTC

No, not completely impossible. I said there's no direct evidence.


I think there is direct evidence in that people aren't getting through and they feel the need to force it through by pressing retry. Put enough of these users together and they can have a significant impact.

I feel it's more likely that some comm problems are caused by hosts that are in need of work and are repeatedly asking for work. My 6.10.60 pc does that every five minutes. And has been doing that all day, every day since it hasn't been able to fill its 4 day cache. How many hosts are doing that continuously??


There may be some bug in the comms logic in BOINC, I'm not disputing that. My only argument is that people should not willingly make the situation worse, even if it is only effecting a small portion of users by abusing the retry button.
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Message 1168553 - Posted: 6 Nov 2011, 5:21:24 UTC - in response to Message 1168547.  

I can assure you that these extra requests are having a negative effect on the servers. Dead sure.

Once again, i agree.
Once again i point out that the effect is too small to be significant.
ie- if the retry button on all hosts was to be disabled, it would have no effect; there would be no improvement in uploads, downloads, scheduler requests.
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Message 1168554 - Posted: 6 Nov 2011, 5:25:56 UTC - in response to Message 1168547.  

[/quote]

SETI@Home isn't using the FTP protocol though, they are using HTTP via TCP/IP.

And by the way, I have 20 years of experience as a tech, 10 of those as a SysAdmin. I can assure you that these extra requests are having a negative effect on the servers. Dead sure.[/quote]

I am aware that these extra requests are having a negative effect on the servers. But how much? Bring this to a test. I can see that in the cricket graph if you are right.
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Message 1168556 - Posted: 6 Nov 2011, 5:32:19 UTC - in response to Message 1168553.  

Once again i point out that the effect is too small to be significant.
ie- if the retry button on all hosts was to be disabled, it would have no effect; there would be no improvement in uploads, downloads, scheduler requests.


I think the effect would be > 0 and there would likely be less failures to reach the SETI servers by some participants.
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Message 1168558 - Posted: 6 Nov 2011, 5:33:51 UTC - in response to Message 1168554.  

I am aware that these extra requests are having a negative effect on the servers. But how much? Bring this to a test. I can see that in the cricket graph if you are right.


If I could provide you with specific numbers, I would, but it should be obvious that the numbers are greater than zero. So while it will not solve all of the bandwidth problems, it would prevent more than a few clients from being unable to contact the SETI servers.
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Message 1168561 - Posted: 6 Nov 2011, 5:44:05 UTC - in response to Message 1168556.  

Once again i point out that the effect is too small to be significant.
ie- if the retry button on all hosts was to be disabled, it would have no effect; there would be no improvement in uploads, downloads, scheduler requests.


I think the effect would be > 0 and there would likely be less failures to reach the SETI servers by some participants.


There are roughly 155,000 active users (250,000 hosts). Lets say there are a couple of hundred active users of the message boards (unlikely to be that high) & all of them hit the retry button whenever possible (even less likely). That's 0.0013% of the user base (0.0008% of the hosts base). There is no way something so small could have any significant effect.
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Message 1168563 - Posted: 6 Nov 2011, 5:46:24 UTC - in response to Message 1168561.  

Once again i point out that the effect is too small to be significant.
ie- if the retry button on all hosts was to be disabled, it would have no effect; there would be no improvement in uploads, downloads, scheduler requests.


I think the effect would be > 0 and there would likely be less failures to reach the SETI servers by some participants.


There are roughly 155,000 active users (250,000 hosts). Lets say there are a couple of hundred active users of the message boards (unlikely to be that high) & all of them hit the retry button whenever possible (even less likely). That's 0.0013% of the user base (0.0008% of the hosts base). There is no way something so small could have any significant effect.


What about the number of users that don't visit the message boards but are still savvy enough or anxious enough to press the retry button?
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Message 1168574 - Posted: 6 Nov 2011, 7:09:59 UTC - in response to Message 1168563.  

What about the number of users that don't visit the message boards but are still savvy enough or anxious enough to press the retry button?

I would suggest an even smaller percentage.
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Message 1168577 - Posted: 6 Nov 2011, 7:44:19 UTC

I would beg to disagree - the number of users who will hit the retry button and not visit the message boards will far outweigh those who will visit the message boards. I've seen this so many times in the "outside world" where users will try and use the equivalent to the retry button, but not pick up the phone and listen the the message that would tell them that the service they are trying to use if off-line and will be off-line for hours.
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Message 1168637 - Posted: 6 Nov 2011, 14:26:57 UTC

I have a cache set for 10 days and it seems that it's never enough. Right now I am out of work and the server or router problem has not been out for 10 days.
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Message 1168640 - Posted: 6 Nov 2011, 14:34:28 UTC - in response to Message 1168574.  

What about the number of users that don't visit the message boards but are still savvy enough or anxious enough to press the retry button?

I would suggest an even smaller percentage.


Like Rob, I have to disagree. I still think the percentage is closer to .5-1.0% which is enough to cause significant delays in comms for a lot of users when the servers are already overloaded with requests from other clients.
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Message 1168643 - Posted: 6 Nov 2011, 15:07:37 UTC

Please avoid suggesting that our fellow seti users have malicious intent in using the retry button. They are not causing the problem. They are reacting to it.
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Message 1168651 - Posted: 6 Nov 2011, 15:53:51 UTC - in response to Message 1168643.  

Please avoid suggesting that our fellow seti users have malicious intent in using the retry button. They are not causing the problem. They are reacting to it.


Please re-read what I've posted. I never said they have malicious intent, and I agree they are reacting to it. However, I am trying to point out that in doing so, they are potentially making the problem worse. It only becomes malicious if in the light of a new view they choose to ignore the warnings and continue with their behavior in their own need to force things through.

My point is that sometimes what we think is the natural and right thing to do is exactly the wrong thing to do. For example, when I worked as an IT Administrator for a small nursing home, I had to undergo protective training. One piece of that training explained that if someone is biting you, our natural reaction is to rip our flesh out of their teeth causing a tear. In fact, the best thing to do is to push your body further into their mouth to that point that it overwhelms their jaws, and to provide a para-sympathetic response which automatically forces the jaws to release.
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Message 1168657 - Posted: 6 Nov 2011, 16:10:15 UTC
Last modified: 6 Nov 2011, 16:10:34 UTC

In 99% of cases I would agree that unnecessary button pushes usually make situations worse. But by accident a few weeks ago, after not getting any tasks for hours, I was going to switch the computer off as I was going to be out all day. Only to find it had just been allocated a few tasks, but these were very quickly into a project back-off.

So I hit the retry button and although a couple failed, the first time, all were downloaded in about 5 minutes. So since then I have done it a few more times and on most but not all, the majority of tasks have downloaded with only one or two pushes.

Therefore in this case I would say hit the retry button, but don't hit it repeatedly.
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Message boards : Number crunching : A temp fix for our bandwith problems ?


 
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