Updated: 8/13/2005; 6:36:52 PM.
Jason J. Thomas' Weblog
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Tuesday, November 30, 2004

Well, today, it would appear that two good things, and potentially a third good thing happened at work today.

We may have discovered a cause and solution to the IMAP outages we experienced over the weekend.   More on this, but it appears a vulnerability in another IMAP Mail server may be the culprit. 

Another good thing that happened today is that we may have determined the cause of the high utilization bottleneck on our backend NetMail servers. In the last six weeks, we have done a lot of work to "peel back the layers of the onion." 
Essentially, when a ResolveName request comes through, eDirectory will return back an entry plus referrals for a certain object. To prevent the referrals from going to the same server, a randomize function is called, but it is called within NICI. Essentially, what happens is bunches of threads get stuck behing NICI, as NICI employs a R/W Writer Lock. Apparently, DS engineering will make a modification, but it may or may not shift the problem elsewhere down another codepath.

A nice third good thing is the coming end of the NetMail system and my work on it.  The CIO formally announced our move to Mirapoint, and I welcome it as it will free me to do other things.  Nonetheless, this does not change my perspective in seeking employment elsewhere. 

On other points, I need to get to bed, as I have beenup way too late doing work. More tomorrow, as I am sure that my commute will be bad since it will be raining.
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