Critical Path Anti-spam Maintenance
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Critical Path Anti-spam Maintenance
24-10-2007 8:25 PM
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A quick heads up that I've just posted the following Service Status and blog posts to the Usertools Site and Comms blog regarding a significant piece of work we'll be carrying out on the mail platform next week.
Basically, we will be deploying our Critical Path anti-spam solution in front of the live customer servers again. I'll not go into too much detail here at a risk of repeating myself, but I'm sure I'm right in assuming that some of you may be slightly concerned by this prospect - Especially given the email delays/loss that occurred last time.
We're fully confident we've covered all eventualities this time round and have a strict roll-back plan which can be implemented quickly at the sign of any trouble. I've spent some time explaining the rationale behind this decision, and have attempted to allay many of the concerns customers may have in the Service Status and blog post I have made.
If you have any feedback, concerns, questions or worries about this work then please feel free to post them here and we'll do our best to address them. I'd strongly suggest reading the infromation I have linked to before doing so as there's a good chance I may have already covered the question you're wanting to ask.
There's always going to be a risk associated with any work we do, however we feel that we're very well prepared for this work and have gone a long way to ensuring that all eventuatlities we can think of have been covered.
Needless to say, many of you have been very helpful in the past in quickly identifying problems both during and following a roll-out and we'll especially be looking for your feedback during and after this work. Those involved with the roll-out will be monitoring this thread closely and we'll be on hand to quickly identify and react to any issues should they occur.
The benefits of this work should it be successful are very promising and this should hopefully see a large step towards overcoming the reoccurring issues (notably email delays) that keep on popping up to bite us.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
24-10-2007 8:48 PM
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At least by posting this then the community as a whole will be able to assist in any issues that may arise.
I look forward to seeing the performance graphs over the coming weeks to see how the new configuration performs in a live environment.
Good luck!
B.
Re: Critical Path Anti-spam Maintenance
25-10-2007 12:58 AM
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Quote from: Barry Incredibly verbose description Bob, for which I thank you.
You're welcome!
Quote At least by posting this then the community as a whole will be able to assist in any issues that may arise.
Which is certainly the idea.
Quote I look forward to seeing the performance graphs over the coming weeks to see how the new configuration performs in a live environment.
Good luck!
Thanks, we moved two central pipes the other day without hitch so here's hoping!
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
29-10-2007 2:06 PM
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After the first server goes live you'll be able to see graphs showing the latency and queues on the Critical Path devices compared to the queues on the sunmxcores. This will allow you to see exactly what's happening in real-time.
They're not available at the moment, however once the roll-out commences you'll be able to see the graphs here.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
30-10-2007 10:19 AM
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Re: Critical Path Anti-spam Maintenance
30-10-2007 11:24 AM
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You can monitor the Critical Path graphs here.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
30-10-2007 11:40 AM
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Quote from: Bob This means there shouldn't be a change to detection rates as originally announced.
This doesn't quite look to be true this morning, although I admit that the sample size is a bit small so I'm not going to go claiming that PN have broken the spam system yet. But I was very surprised to turn on my computer a few minutes ago and find six pieces of spam e-mail since midnight today, whereas I'd normally get about two in a whole day. I can't really spot a pattern; the e-mails have arrived from several sunmxores and there's none of that '0.4000' stuff going on in the Dspam factors. I do note, though, that four of the six e-mails show a 'X-Dspam-Probability' of 0.0000 or 0.0001 so I don't know if that's hinting at anything.
I'm not going to be around for much of the rest of the day to monitor things, so my main purpose in posting this is to encourage other people to check to see if they've also been seeing considerably more spam arrive since the early hours of this morning... if they haven't then I guess it was just a little coincidence; if they have then maybe something is broken after all.
Re: Critical Path Anti-spam Maintenance
30-10-2007 11:57 AM
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You mentioned you deployed sunmxcore-09 *in front* of the CP boxes? I thought the idea was to do it the other way round?
Also, there are two CP boxes - is the eventual idea to have a pair of CP boxes filtering and feeding each mxcore?
Anyway, I'll be F5-ing the graphs every 15 mins to see how it goes
B.
Re: Critical Path Anti-spam Maintenance
30-10-2007 12:04 PM
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The arrangement is designed to work as follows:
load balancer > CP Box > load balancer > mail server
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
30-10-2007 12:25 PM
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The graphs are fairly fun to watch (ok, ok. I'm waiting for a large recompilation that usually takes about 25 mins :P)
Are pih-criticalpath01 and pih-criticalpath02 both "feeding" sunmxcore09 ?
Also, out of interest why are the CP boxes feeding back through the load balancers? I tried to figure it out from the blog post but I'm assuming it's in case you need to drain the queues on the CP boxes in case of a full rollback?
B.
Re: Critical Path Anti-spam Maintenance
30-10-2007 12:40 PM
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Quote The pending queue on the Critical Path appliance is greater than 10,000, and increases by more than 1,000 every 5 minutes.
rollback condition.
Ah well, better luck next time.
Re: Critical Path Anti-spam Maintenance
30-10-2007 12:43 PM
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Re: Critical Path Anti-spam Maintenance
30-10-2007 12:46 PM
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Quote from: Barry Also, out of interest why are the CP boxes feeding back through the load balancers? I tried to figure it out from the blog post but I'm assuming it's in case you need to drain the queues on the CP boxes in case of a full rollback?
It's to ensure load across the 22 mail servers is handled efficiently and helps prevent the CP boxes flooding a particular mail delivery server. If there was a CP box for each server then we wouldn't need to do this but that would be overkill.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Critical Path Anti-spam Maintenance
30-10-2007 1:34 PM
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Quote from: Chris performing happily.
Well, it certainly looks like it - the queues on cp01 and cp02 are around nil!
* Scuttles off to do some other type of work before getting hooked into refreshing the status graphs *
B.
Re: Critical Path Anti-spam Maintenance
30-10-2007 1:38 PM
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jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
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