site to site bandwidth experiences

[AndyMcM]

Hi All,

Am working on a solution at the moment to set up SRM between two sites using a NetApp iSCSI SAN.

Looks like there is going to be around 100 VM's located at the primary site and the SAN will be mirrored over a 100MB LES connection.

Does anyone have any examples of how many VM's that they are running in SRM.

Want to try and get a very rough idea if a 100MB LES line will be good enough to so the SAN syncing between the two sites.

Cheers!!

A.

[Michelle_Laveri]

Hi All,

Am working on a solution at the moment to set up SRM between two sites using a NetApp iSCSI SAN.

Looks like there is going to be around 100 VM's located at the primary site and the SAN will be mirrored over a 100MB LES connection.

Does anyone have any examples of how many VM's that they are running in SRM.

Want to try and get a very rough idea if a 100MB LES line will be good enough to so the SAN syncing between the two sites.

Cheers!!

A.

I think a lot depends not on the amount of VMs you are running - but the amoutn i/o and new data/modified blocks they do...

It's likely if you have TB+ of data, you will bring the two netapps to the same location - and synch them that way for the first snapshot... and then switch to asynchronous replication. i.e replicating once every 5/10/15/30/45/60 minutes the various volumes/LUNs you have. Much depends on your RPO an RTO requirements

As for the maximum amount of VMS protected by SRM - VMware have tested upto 500 VMs in a SRM environment...

Regards

Mike

[joekim13]

We recommended and implemented Juniper WXC wan accelerators (as we are a Dell/ Juniper and VMware reseller/partner) and got up to 70%+ compression. For example our daily data replication went from 1.5gb to 300~400mb with the WXC's. Utilzing a Dell Equallogic PS5000 over a very low bandiwidth link.

We did our first pass replication onsite by replicating the 2ndary dr site ip address @ our primary site and then moving everything over.

I can also provide logs data if anyone is interested.

jkim at novadatacom doc com