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Re: [pcp] MMV questions

To: Paul Cowan <cowan@xxxxxxxxxx>
Subject: Re: [pcp] MMV questions
From: Nathan Scott <nscott@xxxxxxxxxx>
Date: Mon, 15 Jun 2009 15:43:29 +1000 (EST)
Cc: Max Matveev <makc@xxxxxxxxx>, pcp@xxxxxxxxxxx
In-reply-to: <4A35A166.6010402@xxxxxxxxxx>
----- "Paul Cowan" <cowan@xxxxxxxxxx> wrote:
> ... 
> So file format would become something along the lines of
> 
> Byte  Content
> 0     Header
> 32    TOC 1 (type = metrics)
> 48    TOC 2 (type = instances)
> 64    TOC 3 (type = values)
> 80    TOC 4 (type = strings; no change to TOC content required I
> think)
> 96    ... metrics instances + values follow as per normal ...
> x     String 1
> x+256 String 2
> x+512 String 3
> ... and so on.
> 
> Does this make sense? Seems relatively easy and low-impact, I think.
>

Yep, I think thats the way to go.  We should implement the help text
support at the same time I think, using the same section type.

> Another option would be to have 2 types, STRING and SHORT_STRING, with
> 
> values known to be short (<=15 bytes) shoved in the 16 bytes allowed
> for 
> the pmAtom + DISCRETE/INTEGRAL space. Not sure if this is worth it.

Yeah, I dont think its worth handling the extra case, if the larger
string sections are supported.

cheers.

-- 
Nathan

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