[ha-clusters-discuss] HA-Informix - project page and design docs

[Neil Garthwaite]

Hi Nick,

Many thanks for the detailed review. Please see my comments below, I 
will update the docs to reflect your comments/requests.

Regards
Neil

Nicholas Solter wrote:

>Neil,
>
>Sorry for the late review. In general, it looks good. Here are a few 
>comments:
>
>Caller Sequence:
>
>In the diagrams, the one on the right is labeled as running in the NG 
>zone, but I think you're really referring here to a specific case of 
>running in the NG zone using failover zones. That could be better 
>labeled to make it clear that the figure on the left actually applies to 
>global zone and non-global zone as "logical node."
>
>Should make it clear that one single agent can be used in any of the 
>three modes you specify (global, non-global, failover zone).
>
>  
>

Agreed, I will update the doc to make this clear.

>I'm confused as to whether the "HA-Informix code" you mention on slide 2 
>is part of the agent or part of Informix itself. I think what you're 
>saying is that a "control script" serves as an adapter between GDS/SMF 
>and Informix itself. Is that correct? [Note: I see this is explained in 
>the design document].
>
>  
>

Agreed, I will update the doc to make this clear.

>In slide 3, what change do you need to make to the config file? Can this 
>be done without requiring manual edits of a file (by resource 
>properties, for example)?
>
>  
>

No, the edits to the config file determine the runtime environment that 
the IDS resource will use. The ids_config file will contains these 
values which are then used by the ids_register script. Upon registration 
the values are then stored in the CCR or SMF repository as reuiqred.

I will update the doc to make this clear.

>In slide 4, does the validation validate the resource properties, or 
>values set in the config file?
>  
>

The validate method is called when the resource is created or started. 
This is already described in paragraph 2 from the notes on slide 4.

>In slide 7, can you say more about how the probe will actually probe 
>informix?
>  
>

Agreed, I will update the doc to reflect this.

>Design Doc:
>
>I think you should give more details on the probe, as that's one of the 
>more interesting aspects of an agent.
>  
>

Agreed, I will update the doc to reflect this.

>I think you should specify exactly what variables will be specified in 
>the config file.
>  
>

Agreed, I will update the doc to reflect this.

>What's the difference between the registration file in 8 and the OHAC 
>registration file in 10?
>  
>

There's a typo in 8, it should read registration script vs registration 
file. However the difference between 8 & 10 is that 10 is the Resource 
Type Registration file so that the IDS agent can be registered and 
upgraded vs the registration file that is used in 8 to register the IDS 
resource.

>Thanks,
>Nick
>
>Neil Garthwaite wrote:
>  
>
>>Hi Everyone, 
>>
>>Just a gentle reminder to say that the HA-Informix project page http://opensolaris.org/os/project/ha-informix has two documents that outline the design and caller sequence between the various components that this agent will use. 
>>
>>The docs were posted on 7th August 2007, I'd appreciate any comments you have by the 18th October 2007. I stated in the project proposal that my aim is to "deliver this agent back to Solaris Cluster as a fully supported Solaris Cluster agent."
>>
>>Your help with reviewing these docs is much appreciated and will be helpful in getting this project into Solaris Cluster.
>>
>>Regards
>>Neil
>>--
>>
>>This message posted from opensolaris.org
>>
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>
>  
>