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| Queries regarding AO and cage level redundancy https://www.3parug.com/viewtopic.php?f=18&t=1048 |
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| Author: | storageguy123 [ Thu Dec 04, 2014 7:59 am ] |
| Post subject: | Queries regarding AO and cage level redundancy |
Hi Guys, Hope everyone going great. Here is my query, as we know AO moves data at region level so when it moves data from regions (regions from CPGs having cage level redundancy) to regions (regions from CPGs not having equal cage level redundancy) . So will my data be at risk.?????? so how 3par manage it over all. I hope you understand my query.. Thanks in advance 
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| Author: | RitonLaBevue [ Thu Dec 04, 2014 8:03 am ] |
| Post subject: | Re: Queries regarding AO and cage level redundancy |
Quite easy to answer... Loose one cage and you loose your data. Nothing more to say. |
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| Author: | JohnMH [ Thu Dec 04, 2014 8:53 am ] |
| Post subject: | Re: Queries regarding AO and cage level redundancy |
As above AO spreads the volume data over multiple CPG's as such the volume is only as resilient as the weakest point, which in this case would be Mag level availability. |
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| Author: | 3ParDude_1 [ Thu Dec 04, 2014 9:06 am ] |
| Post subject: | Re: Queries regarding AO and cage level redundancy |
Like RitonLaBevue says you will effectively end up receiving the lowest level of cage availability that is in your AO config |
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| Author: | storageguy123 [ Thu Dec 04, 2014 10:58 am ] |
| Post subject: | Re: Queries regarding AO and cage level redundancy |
Hi Guys, Thanks for your experts thoughts, So what i understand here is for a single volume i can have some data on cage level redundancy and some data might have mag level redundancy as well. |
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| Author: | Schmoog [ Thu Dec 04, 2014 11:43 am ] |
| Post subject: | Re: Queries regarding AO and cage level redundancy |
That is correct yes. Ideally you would want all your tiers to have cage-level availability, but it is certainly possible with AO to have part of the volume on a mag-level tier. |
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