Mirroview Async

Question

Hi,
Does anyone knows how Write-Order-Consistency work in MirrorView Async ??
How it is manages the write order . Is the Secondary Image is always consistent in Async mode at given point of time (may be few mins back old data but very much consistent).. Can we go with MirroView/A option on Oracle or sybase database?? Is it tested and any white paper for this proof.

thanks in advance.

kelleg · Accepted Answer

Raid type is not important in the group. If may be important on the mirror side (DR) LUNs

Make sure you understand the performance implications when using consistency groups - if you have a lot of LUNs in a group and they all start the update at the same time, each LUN will need to create a snapshot on the source side (the first time you do an update). You could see some slow down at that point if the hosts are doing a lot of Writes at that time. Make sure the reserve LUNs have sufficient disks to handle the potential IO load.

glen

Vivekjaiswal001 · Answer

Hi Sandy,This usually happens with the delta maps.To knw more on the same have a look at this dochttps://powerlink.emc.com/nsepn/webapps/btg548664833igtcuup4826/km/live1//en_US/Offering_Technical/White_Paper/H2417_clariion_mirrorview_asynch_dr_wp_ldv.pdfPage 32I hope this doc will clear all your thoughts on MirrorView.Regards,Vivek

OnlySandy · Answer

Thanks Vivek ,this will help.
I can use consistency group as option and put all the DataLuns and ArchLuns in same group.

But my DataLuns are Raid-5 and ArchLuns are Raid1+0 , so will MirrorView allow me to put them all in one Constistency group ??
So that data nad archives all in consistent state.

CLARiiON

Mirroview Async

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