[ubuntu-cloud] UEC Single Point of failure

[Zeeshan Ali Shah]

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 <mailto: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 <mailto: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
>>         <mailto: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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>
>
>     -- 
>     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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