[sheepdog] [sheepdog/sheepdog] e98977: sheep: avoid diskfull caused by recovery process

[Hitoshi Mitake]

On Sun, May 1, 2016 at 12:14 PM, AP <sheepdog at inml.weebeastie.net> wrote:

> On Tue, Apr 26, 2016 at 07:20:15PM -0700, Hitoshi Mitake wrote:
> > sheep can corrupt its cluster by diskfull with recovery process. For
> > avoiding this problem, this patch adds a new option -F to dog cluster
> > format. If this command is passed during cluster formatting, every
> > sheep process of the cluster skips recovery if there is a possibility
> > of diskfull during recovery.
>
> I'm a little confused and am wondering if I am reading this incoorectly.
>
> This sounds like the default is to set up the cluster in such a way that
> it'll corrupt itself.
>
> Shouldn't it be the other way around? That the default should leave you
> safe and you have the option of running naked through the poison ivy
> if that's your idea of fun.
>
> Or did I miss something?
>

The default setup will corrupt the cluster if there is no enough space for
recovery as you say. However, the new option can result a situation that
some objects lack its enough replicas. Maybe adding a new option for
killing the cluster itself when there's no enough space would be good.

Thanks,
Hitoshi


>
> AP
>
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