sarpydog
2 Iron

I'd like to turn on sparseTws feature

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Dear All,

I want to use Fully provisioned iSCSI LUN with virtually provisioned TWS, and turn on sparseTwm parameter.

Could you share any experience or impacts if I use this feature?

Thank you,

Dennis Dai

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Rainer_EMC
5 Rhenium

Re: I'd like to turn on sparseTws feature

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just turn on the param

the only impact is that if you dont have enough space in the file system a promote or write to a read-write snapshot can fail

Just take into consideration that this param is really *only* for the TWS part - it wont change anything for the space reservation for readonly snapshots.

and you do need a base readonly snapshot in order to promote it read-write - the TWS only stores the changes for that

Rainer

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Rainer_EMC
5 Rhenium

Re: I'd like to turn on sparseTws feature

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just turn on the param

the only impact is that if you dont have enough space in the file system a promote or write to a read-write snapshot can fail

Just take into consideration that this param is really *only* for the TWS part - it wont change anything for the space reservation for readonly snapshots.

and you do need a base readonly snapshot in order to promote it read-write - the TWS only stores the changes for that

Rainer

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sarpydog
2 Iron

Re: I'd like to turn on sparseTws feature

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Thank you. It's valeable information.

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