Why is my and alot of other peoples RAC starting to drop . Is it because of the backlog on the transitioner ? Does anyone know ?

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Mine hasn't dropped. In fact it has increased slightly despite me now giving around 10% share to other projects.

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I suspect with the outage we had, and all the quick validation that did get done for several days, now things are finally getting to normal, and the RAC will be leveling off.

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That could very well be the problem Pooh Bear. Thanks :)

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That could very well be the problem Pooh Bear. Thanks :)

No, Pooh Bear is talking complete rubbish as usual. The Transitioner backlog is now at 10 hours and increasing. Almost nothing is being validated here and my RAC is dropping like a stone when it should be rising due to having added/upgraded crunchers.

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Be lucky

Neil

The way RAC is calculated means that even minor variations in work flow and credit granting will have a major impact on RAC. Which, unfortunately, makes it close to useless.

The sensitivity I think is aggrivated if you are doing multiple projects as your project work varies.

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No, Pooh Bear is talking complete rubbish as usual. The Transitioner backlog is now at 10 hours and increasing. Almost nothing is being validated here and my RAC is dropping like a stone when it should be rising due to having added/upgraded crunchers.

Err... not really. The transitioner doesn't grant credit, the validator does. There WAS a huge backlog on the validators last week. Now it is gone. Therefore a LOT of credit was granted this week. This will artificially inflate your RAC because a lot of credit is granted in a short period of time.

Look at your history graphs here. You got a bunch of credit between 9 and 5 days ago. During that time your RAC went up higher than it had been. Now it has dropped off SLIGHTLY. It is still higher than it was 2 weeks ago. Right now you are being granted credit at a pretty steady rate. Not sure where you picked up the idea that nothing is being validated and your RAC is dropping...

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Not sure where you picked up the idea that nothing is being validated and your RAC is dropping...

While I agree that RAC is most likely just going back down to normal, the validator has indeed been running behind the last couple of days, even though the status page doesn't say so. For the last three days, I have had 50+ wu at all times that have had three, sometimes even four, valid results returned, yet they take quite awhile to actually get granted credit. Below is just one example.
http://setiathome.berkeley.edu/workunit.php?wuid=19765598

You also have to be careful about some of the data pages because they can be cached and may be out of date ... in theory they date the pages cached, but this is not always true.

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No, Pooh Bear is talking complete rubbish as usual. The Transitioner backlog is now at 10 hours and increasing. Almost nothing is being validated here and my RAC is dropping like a stone when it should be rising due to having added/upgraded crunchers.

Err... not really. The transitioner doesn't grant credit, the validator does.

The transitioner does mark results as ready for validating, though. :P

Not sure where you picked up the idea that nothing is being validated and your RAC is dropping...

From seeing the large number of results returned that are still marked pending despite 3 or even 4 results having been returned.

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Be lucky

Neil

Not sure where you picked up the idea that nothing is being validated and your RAC is dropping...

While I agree that RAC is most likely just going back down to normal, the validator has indeed been running behind the last couple of days, even though the status page doesn't say so. For the last three days, I have had 50+ wu at all times that have had three, sometimes even four, valid results returned, yet they take quite awhile to actually get granted credit. Below is just one example.
http://setiathome.berkeley.edu/workunit.php?wuid=19765598

I have to agree, I have gone from 54 waiting to vaildate to 100 in 3 days. Most have at least 3 results and many 4. It seems this evening that things are starting to move again.

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My point here is that your RAC is NOT "dropping like a stone". It is behaving normally. There was a bunch of backlogged credit granted in a short amount of time so RAC was artificially inflated and was just settling back to where it should be - as Pooh Bear said. It looks like it will be shooting up again today. The transitioner backlog is almost cleared. But tomorrow, expect it to drop a little again. rajausa, your graphs can be seen here. Same thing. They spiked and then leveled out slightly. I see no "drops".

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A member of The Knights Who Say NI!
For rankings, history graphs and more, check out:
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My point here is that your RAC is NOT "dropping like a stone". It is behaving normally. There was a bunch of backlogged credit granted in a short amount of time so RAC was artificially inflated and was just settling back to where it should be - as Pooh Bear said. It looks like it will be shooting up again today. The transitioner backlog is almost cleared. But tomorrow, expect it to drop a little again. rajausa, your graphs can be seen here. Same thing. They spiked and then leveled out slightly. I see no "drops".

Umm, I'd call having an RAC of ~2750 15 days ago changing to ~1800 11 days ago a drop.

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My point here is that your RAC is NOT "dropping like a stone".

Your point was just as wrong as Pooh Bear's. On one machine, the RAC dropped from 3 figures to single figure in a day. I call that dropping like a stone.

It is behaving normally. There was a bunch of backlogged credit granted in a short amount of time so RAC was artificially inflated and was just settling back to where it should be

Not at all. As I stated, I have increased my crunching power substantially and my RAC should be rising - which it now is since the Transistioner caught up.

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Be lucky

Neil

As it has been stated before, the RAC is not a number that can be trusted. It is way too dependant on several factors. It's going to go up and down. Also, I doubt an RAC can drop to a single digit in a day from 3 digits, because of the way it is programmed.

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As it has been stated before, the RAC is not a number that can be trusted. It is way too dependant on several factors. It's going to go up and down. Also, I doubt an RAC can drop to a single digit in a day from 3 digits, because of the way it is programmed.

RAC is an indicator. Small fluctuations are meaningless. Large changes ARE significant - but, then you call me a liar and I resent that in the extreme. That host has now reached double digits but, two days ago it was around 120.

Once again, you shoot your mouth off without a brain cell behind it.

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Be lucky

Neil

As it has been stated before, the RAC is not a number that can be trusted. It is way too dependant on several factors. It's going to go up and down. Also, I doubt an RAC can drop to a single digit in a day from 3 digits, because of the way it is programmed.

RAC is an indicator. Small fluctuations are meaningless. Large changes ARE significant - but, then you call me a liar and I resent that in the extreme. That host has now reached double digits but, two days ago it was around 120.

Once again, you shoot your mouth off without a brain cell behind it.

Actually... Pooh is right again. If you start off with 120 RAC and decay it over a period of 24 hours without adding any credit, you end up with 108.7. To get to single digits from 120, it takes about 25 days of no credit being granted. Run the numbers for yourself if you like. Code is here. Can we keep personal insults out of this please?

The only way for a host to drop that far in RAC in a single day is if it hasn't had any work validated in ~25 days. RAC will remain where it was last time credit was granted. Then when the host returns another work unit and is granted credit, the 25 days of RAC decay will suddenly hit and you end up with less RAC than you started out with even though your total credit just went up. But if a host hasn't been returning work for 25 days, its RAC *SHOULD* drop.

It seems that you are ranting about one of your hosts losing RAC, not you as a user. Your overall RAC *IS* higher than it has been anytime in the last 4 weeks except for right after the validator backlog was cleared 3-4 days ago. Unless you are talking about the big dip that happened 10-12 days ago but this thread was started after that was over so... I'm still confused as to where this "dropping like a stone" is.

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A member of The Knights Who Say NI!
For rankings, history graphs and more, check out:
My BOINC stats site

RAC is an indicator. Small fluctuations are meaningless. Large changes ARE significant - but, then you call me a liar and I resent that in the extreme. That host has now reached double digits but, two days ago it was around 120.

Once again, you shoot your mouth off without a brain cell behind it.

Hrm, wonder if my lawyer would like to see this and call it a slander...

Watch what you say in a public forum. Since I know I was right, because I have saw some of the programming, I have a leg to stand on.

I would suggest that you cease and desist on the remarks about me.

If, and only if something like this did happen, something broke somewhere. There are many stat sites out there that can prove if this happened. I am not worried about it, because you just have decided that I am wrong, and that you need to cut me down.

Have a nice day.

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It seems that you are ranting about one of your hosts losing RAC, not you as a user.

ALL of my hosts dropped during that 24 hour period- that one was just the most extreme. My top ome dropped from 620+ to 570.

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Be lucky

Neil

Maybe that you missed it, but everyone here was frozen for a couple of days with all the Seti outages around 14 days ago. Loads of units were "ghosted". Then we had a long validator backlog. So maybe that you expected your RAC to drop the next day... at most times it doesn't.

Now look at Toby's post part

The only way for a host to drop that far in RAC in a single day is if it hasn't had any work validated in ~25 days. RAC will remain where it was last time credit was granted. Then when the host returns another work unit and is granted credit, the 25 days of RAC decay will suddenly hit and you end up with less RAC than you started out with even though your total credit just went up. But if a host hasn't been returning work for 25 days, its RAC *SHOULD* drop.

Substitute the ~25 for ~14 (at maximum) and see where that leads you.
You won't get any further up the loved list by calling people names here.

You may want to look in the mirror first before you think someone calls you a liar again. Most of what I saw coming out of your keyboard doesn't belong on these forums. If you've got a beef with someone, or even so much as think you got a beef with them, go ahead and call them names privately. At that time you ought to have their email address.

You don't mind if I plonk your number 765014, do you?

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