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Re: Trying out ElasticSearch PMDA for the first time

To: Paul Smith <psmith@xxxxxxxxxx>
Subject: Re: Trying out ElasticSearch PMDA for the first time
From: fche@xxxxxxxxxx (Frank Ch. Eigler)
Date: Tue, 07 Apr 2015 21:50:12 -0400
Cc: Nathan Scott <nathans@xxxxxxxxxx>, pcp@xxxxxxxxxxx, chandana@xxxxxxxxxxxxx
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <C043321E-D61A-4617-805C-0B8D6A8E4240@xxxxxxxxxx> (Paul Smith's message of "Wed, 8 Apr 2015 09:21:58 +1000")
References: <1427957070.8765.30.camel@xxxxxxxxxxxxx> <1446889888.13182385.1428377259368.JavaMail.zimbra@xxxxxxxxxx> <1428383139.24854.1.camel@xxxxxxxxxxxxx> <882410516.13878102.1428446368567.JavaMail.zimbra@xxxxxxxxxx> <C043321E-D61A-4617-805C-0B8D6A8E4240@xxxxxxxxxx>
User-agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux)
Paul Smith <psmith@xxxxxxxxxx> writes:

> Hi, almost certain the current PMDA won't work with the later
> version of ES.  [...]

While there appears to exist no pcpqa for this pmda, this episode is
another example of why pcp/pmda testing against real live host
software should be considered the gold standard (so we can notice
obsolescence or incompatibility), rather than synthetic/snapshotted
artifacts (which can give false assurance).

> The 'good' news is that the current version of ES has a very nice
> simple _cat API (see [1]) [...]

See also dsmith/dev's json pmda.  It may take even less work to write
some json-metadata for the interesting-version elasticsearch json
stats, than to update|rewrite the old elasticsearch pmda.

- FChE

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