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Re: [pcp] braindump on unified-context / live-logging

To: Greg Banks <gbanks@xxxxxxx>
Subject: Re: [pcp] braindump on unified-context / live-logging
From: Max Matveev <makc@xxxxxxxxx>
Date: Tue, 14 Jan 2014 11:07:00 +1100
Cc: "Frank Ch. Eigler" <fche@xxxxxxxxxx>, pcp developers <pcp@xxxxxxxxxxx>
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <52D4666E.7030601@xxxxxxx>
References: <20140108013956.GG15448@xxxxxxxxxx> <21198.38090.179929.552608@xxxxxxxxxxxx> <20140110190525.GA28062@xxxxxxxxxx> <0a923e$520gar@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <52D4666E.7030601@xxxxxxx>
On Mon, 13 Jan 2014 14:19:26 -0800, Greg Banks wrote:

 gnb> While I designed and wrote the thing, I was never happy with any
 gnb> of the iterations of the architecture and I wouldn't recommend
 gnb> to anyone that they copy it. Some of the problems were:

 gnb>   * it was both a client of pmcd and a PMDA, which led to interesting 
 gnb> deadlocks with the single-threaded pmcd

That was the "second" pass with nasavg pmda. I thought there was a
first version which only used archives but it had to be abandoned
because tailing of archive being written wasn't working reliably.

max

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