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Re: [pcp] scsi indom in linux PMDA - issues!

To: "Frank Ch. Eigler" <fche@xxxxxxxxxx>, Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Subject: Re: [pcp] scsi indom in linux PMDA - issues!
From: Mark Goodwin <mgoodwin@xxxxxxxxxx>
Date: Wed, 21 Jan 2015 12:52:04 +1100
Cc: pcp@xxxxxxxxxxx
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <y0mtwzkdimv.fsf@xxxxxxxx>
References: <00d101d0350b$a9263430$fb729c90$@internode.on.net> <y0mtwzkdimv.fsf@xxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0
On 01/21/2015 12:31 PM, Frank Ch. Eigler wrote:
[..]
IMHO the cache should be used for only long-lasting invariant-preserving
things like some instance-domains, instead as a general "lookup table for
stuff", with ill-defined scope and lifespan and access control.

There doesn't seem to be any concurrency control either, e.g.
a pmda under pmcd's control calling pmdaCacheOp(SAVE) concurrently
with an app using a local context, or two or more of the latter.

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