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| Removing CPG from AO config and then removing the data https://3parug.net/viewtopic.php?f=18&t=918 |
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| Author: | sc0tt [ Thu Sep 18, 2014 2:59 pm ] |
| Post subject: | Removing CPG from AO config and then removing the data |
Hi, I'm trying to remove a tier from an AO configuration so that I can remove the CPG, but I need to know how to remove the data that was moved to that tier/CPG by AO. The quote below is from the S1 training guide, but I don't see how "You can do so by setting the space for that tier to 0 GiB." When I try to set the Growth Limit by enabling it and putting 0 (zero) I get a message "Growth limit must be greater than or equal to 128.000 GiB" Thank you, From s1 Learner Guide: "You can remove a CPG from a configuration by either specifying a different CPG in its place or by setting the tier’s CPG to “-” (no CPG). However, when a CPG is removed from a configuration, all the VV space mapped to LDs in that CPG remain in that CPG, Adaptive Optimization does not move them to a different CPG. And since Adaptive Optimization no longer considers that CPG in its analysis that space will remain there. Therefore, before removing a CPG from an Adaptive Optimization configuration, you should first make sure that there is no VV space mapped to that CPG. You can do so by setting the space for that tier to 0 GiB. Adaptive Optimization will then move all the VV space out from that CPG to other tiers in that configuration. This may take a few iterations of execution of that configuration. You can use the LD space report for that CPG to see when the CPG is empty. You should also make sure that the CPG is not the default CPG for snapshot and base TPVV allocation otherwise new VV space may get mapped to that CPG." |
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| Author: | hdtvguy [ Fri Sep 19, 2014 5:17 am ] |
| Post subject: | Re: Removing CPG from AO config and then removing the data |
Read this thread: viewtopic.php?f=18&t=853&p=4182&hilit=tunevv#p4182 |
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| Author: | sc0tt [ Mon Sep 22, 2014 9:31 am ] |
| Post subject: | Re: Removing CPG from AO config and then removing the data |
Thank you! Another question (I'm not at the customer site to try this and our lab doesn't have AO): How do I know which volumes are using the CPG I want to remove? Will they show in the GUI under Provisioning>CPGs>clicking on CPG then the Virtual Volumes tab? I know I can see the VVs that were created to use whatever CPG, but does this also show VVs that are partially using the CPG due to data being moved there by AO? Thanks! |
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| Author: | hdtvguy [ Mon Sep 22, 2014 2:11 pm ] |
| Post subject: | Re: Removing CPG from AO config and then removing the data |
showvvcpg I dump that into a spreadsheet and can sort by CPG or volume to figure out what volumes have how much in a given CPG. You can then script the moves. |
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