[ubuntu-cloud] UEC Single Point of failure

[Björn Böttcher]

right.

Still open question:
But do the multiple CC/SC machines synchronize automatically?


2010/11/4 Zeeshan Ali Shah <zashah at pdc.kth.se>

>  As Users enter into Euca system with CLC and Walrus use to transfer images
> etc ,  so unless you have multiple walrus , clc , you will still have SPOF
> (Single point of Failure).
> (I am not sure if we can have multiple CLC and Walrus) .
>
> Zeeshan
>
>
> On 11/04/2010 09:06 AM, Björn Böttcher wrote:
>
> Hm so it might be this setup for a single point of entry/failure-free
> system configuration.
>
>  machine A: CC1/SC1/CLC1/Walrus1
> machine B: CC2/SC2/CLC2/Walrus2
> machine C: NC1
> machine D: NC2
> machine E: NC3
>
>
>  But do the multiple machines synchronize automatically?
>
>  ~Bjoern
>
> 2010/11/4 Zeeshan Ali Shah <zashah at pdc.kth.se>
>
>> Hi ,
>> I think in your case the single point of entry/failure is still Machine
>> A.  even if  have multiple CCs , we will still have single point of failure
>> on ClC/Walrus level .
>>
>> correct me if i am wrong please
>>
>> BR
>>
>> Zeeshan
>>
>>
>> On 11/04/2010 08:53 AM, Björn Böttcher wrote:
>>
>> Hi Ziv,
>>
>>  yes thank you. If I install on two machines a CC like in the example
>> with 5 physical machines:
>>
>>  machine A: CLC/Walrus
>> machine B: CC1/SC1
>> machine C: NC1
>> machine D: CC2/SC2
>> machine E: NC2
>>
>>  Do the CC1 and CC2 and also the SC have automatically the same
>> information? Or do I need to configure something like a Hot-Standby between
>> both machines (in this example B and D) ?
>>
>>  Cheers,
>>
>> Bjoern
>>
>>
>> 2010/11/4 Ziv Leyes <zivley at gmail.com>
>>
>>>  Hi Björn,
>>> I guess you might be confused due to subtle semantics, it doesn't say it
>>> SHOULD be 1 CC, it says at least, the minimal requirement (not recommended
>>> for production environments) is to have 2 machines, but the more, the
>>> merrier.
>>> Please take a look at the different possible topologies in the link
>>> below:
>>> https://help.ubuntu.com/community/UEC/Topologies
>>>
>>>  Hope this helps,
>>> Ziv
>>>
>>> 2010/11/3 Björn Böttcher <bboettche at googlemail.com>
>>>
>>>>  Hi everyone,
>>>>
>>>>  According to https://help.ubuntu.com/community/UE...nstallSeparate<https://help.ubuntu.com/community/UEC/PackageInstallSeparate>,
>>>> there should be only 1 Cloud Controller (CLC) and, as I read the page, only
>>>> 1 Walrus Controller. (WS3)
>>>>
>>>> What would happen is 1 of these crash?
>>>>
>>>>  Is there a recommended solution for backup an UEC Configuration?
>>>>
>>>>  ~Bjoern
>>>>
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>>>>
>>>
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>>>
>>
>>
>>   --
>> Regards
>>
>> Zeeshan Ali Shah
>> System Administrator
>> PDC-Center for High Performance Computing
>> KTH-Royal Institute of Technology , Sweden
>> +46 8 790 9115
>>
>>
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>>
>
>
> --
> Regards
>
> Zeeshan Ali Shah
> System Administrator
> PDC-Center for High Performance Computing
> KTH-Royal Institute of Technology , Sweden
> +46 8 790 9115
>
>
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