[Linux-HA] resource group design question

[Andrew Beekhof]

On 10/5/07, Daniel X Moore <dxm at sgi.com> wrote:
> Hi All,
>
> We have resource groups that contain multiple resources that sometimes
> need to be handled individually, and sometimes as a group.
>
> When starting or stopping a resource group, we want to be able to
> perform the start/stop operation on all the members at the same time (ie
> not stop a, stop b, stop c ... but stop a,b&c together.

as in you dont want to issue 3 commands or you want the stopping to
occur in parallel?

if the latter, can they start in parallel too?

if so, maybe you just need to set ordered=false for the group...

> When adding a member to a group, we want to be able to start the
> individual member

it you add it to the end, this is possible

> and be able to synchronize with the completion of the
> removal.
>
> When removing a member, we want to be able to remove just that member
> and be able to synchronize with the completion of the removal.

not sure i understand what you mean by "synchronize" in this context

> We also want to be able to update (reload) a set of members.
>
> So far, I have two approaches:
>
>         - have a single resource with a list of members.
>         - have a resource group with a individual resources for members
>
> The first approach makes it easy to deal with all members together, the
> second with individual members.
>
> Can anyone suggest a way to get a combination of these behaviours?
>
> cheers
>
> --
> -------------------------------------------------------------------
>   Daniel Moore                              dxm at sgi.com
>   Engineering Manager: AppMan + HA          Phone:  +61-3-9963-1957
>   SGI Australian Software Group             Mobile: +61-4-1360-4720
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