Re: [Gluster-devel] regarding afr changelog options

[Pranith Kumar Karampuri]

----- Original Message -----
> From: "Vijay Bellur" <address@hidden>
> To: "Pranith Kumar Karampuri" <address@hidden>, "Anand Avati" <address@hidden>
> Cc: address@hidden, "Ravishankar Narayanankutty" <address@hidden>
> Sent: Monday, January 13, 2014 2:23:37 PM
> Subject: Re: regarding afr changelog options
> 
> On 01/13/2014 12:25 PM, Pranith Kumar Karampuri wrote:
> > Afr depends on the following options to be enabled to work correctly. I am
> > not sure why they are exposed as user configurable options.
> > I am thinking of dis-allowing these options from being modified. Please let
> > us know your views.
> >
> > Option: cluster.entry-change-log
> > Description: Entry fops like create/unlink will not perform pre/post fop
> > changelog operations in afr transaction if this option is disabled
> > Option: cluster.data-change-log
> > Description: Data fops like write/truncate will not perform pre/post fop
> > changelog operations in afr transaction if this option is disabled
> > Option: cluster.metadata-change-log
> > Description: Metadata fops like setattr/setxattr will not perform pre/post
> > fop changelog operations in afr transaction if this option is disabled
> >
> 
> Some of these options are useful in testing and troubleshooting. It is
> probably better to mark the type for these options as NO_DOC so that it
> doesn't surface in volume set help.

But that is the problem, if they are disabled, afr functionality does not work 
as expected. In the last 2 years on afr I never had to disable these for 
testing anything. I am curious to know what it is useful for. If there is value 
in use-cases with them disabled, I should probably start testing for these as 
well in my testing or automate some use-cases.

pranith
> 
> -Vijay
> 
>