Re: [Gluster-devel] AFR documentation

[Thierry EXCOFFIER]

Krishna Srinivas wrote:
> Self-Heal
> AFR has self-heal feature, which updates the outdated file and directory
> copies by the most recent versions. For example consider the following
> config:
>
> volume afr-example
>   type cluster/afr
>   subvolumes brick1 brick2
> end-volume

Hello.

Imagine you have :
        On network 1 : client 1 (AFR) and server 1 (brick1)
        On network 2 : client 2 (AFR) and server 2 (brick2)

The networks are disconnected.
The 2 clients continue to write on the AFR brick on the same file.

The networks are reconnected.
For the file modified by the 2 clients :
  - If the version numbers are differents, the file with the bigger
    version number is copied over the older version.
    (It's may be not the file with the more recent modification time)
  - If the version numbers are identicals, do you detect that
    the file content is not the same ?

Sincerely yours.
Thierry.
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