[Freedombox-discuss] How to deal with uptime and connectivity issues
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On 03/01/2011 01:52 AM, Felipe Sanches wrote:
> SaaS users usually benefit from high availability provided by
> professional datacenters. Data is often stored redundantly.
> How will we deal with those issues in the scenario of a single plug per
> user tied to a power outlet? Are we expecting people to have multiple
> freedomboxes kept in sync? I foresee people unplugging someone else's
> boxes in order to use the power outlet.
I would imagine that an unplugged plug computer wouldn't present much of
a problem, especially if the network includes store and forward
technology that would guarantee information would get through even with
'sometimes on' connectivity of the individual nodes. My company dealt
with this type of issue when we were deploying a system in Zimbabwe that
was linked by connections that were often down or the equipment had been
stolen and, thus, couldn't transmit data to its peers. We used the basic
concept of a hearbeat, like Matt wrote about, to be able to determine
when it was feasible to transmit data and when it wasn't. It actually
wasn't too difficult and worked out remarkably well.
Also, having your data securely stored on multiple peers would provide
the redundancy you need in the event of a catastrophic data or plug
loss, and the plug computers could be configured so that, after entering
some basic information into a new plug, it queries your peers to
retrieve your data and restore itself to a pre-crash state.
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