Characteristics of SAN and how you use them
We are considering purchasing a Dell MD3000i, half filled with SAS 8x15k the rest filled with 7 x 1 TB 7.2 k.
Due to a limited budget, we cannot go for Equallogic fantasy play all. This will be our backend for our virtual machine environment. Right now we have an Infortrend 16bay SATA to iSCSI box that works, but it is not that we will get the best performance out of it.
The question arose about snapshot and virtual disk copy software licenses. We wonder how 'you' use these features.
We thought on the shots and it's a great idea, we do not understand how snapshots taken a whole lun with 10 virtual machines on it would benefit unless there was a major disaster where several machines were lost or damaged. Currently, we do monthly backups of our model and our VM server machines with VCB VDI. We also backup data using Backup Exec servers.
So with our backup strategy, I don't know how the shots or virtual disk copy would benefit.
Any ideas?
Thank you.
Jason
All the basic features of SAN are nice haves, but should be part of a comprehensive solution that fits your needs. Snapshts based table are nice, but you pointed out the falls. You get a point in time for your LUNS together, so if you're not isolate VM per LUN, then you get an all or nothing approach. And, if you're not using VCB and/or creation of backups, then you get inconsistent backups. But as a lifeline, they have a nice to have.
The bit of functionality that is useful is dedup, if accessible to the public, is who can recover some drive for you, as well as mirroring for DR functionality.
-KjB
Tags: VMware
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