Is there any reduction in IOPS?
Yes, another huge 70% reduction in IOPS with Exchange Server 2010. This is on top of the 70% IOPS reduction from Exchange Server 2007.
What does this mean for my storage requirements?
The Exchange 2007 IOPS reduction meant you could leverage Direct Attach SAS disk storage cabinets vs. traditional SAN for Exchange 2003.
With the additional Exchange Server 2010 IOPS reduction, this means you can deploy even a lower cost storage solution such as Direct Attach with SATA disks and still maintain excellent performance.
If you begin to use some of the triple database replication copy scenarios for database high availability, you could even begin to use JBOD SATA (RAID-less) storage.
The idea behind this logic is since you are maintaining 3+ copies of your database spread over multiple JBOD SATA disks the value of using RAID disk sets adds little value or unnecessary additional performance.
Are there true cost savings with using DAS SATA or JBOD SATA?
With the samples below, you can see with a 2GB mailbox using DAS with SATA drives you can drop the server/storage capex by 38% vs. DAS with SAS drives!
Here is a sample with High availability, you can see a 75% reduction in capex vs. Exchange 2007 when using Database Access Groups (new term for Exchange 2010 high availability) with JBOD SATA storage.
Note: These are preliminary performance and cost figures, and more detailed information will be available when Exchange 2010 launches.
Is there any reduction in IOPS? Yes, another huge 70% reduction in IOPS with Exchange Server 2010. This
원본은 여기 를 클릭하면 볼 수 있습니다. IOPS가 감소되었나요? 네, Exchange 2007에 비해서 70%의 IOPS가 감소되었습니다. What does this mean for
Oh dear - "RAID disk sets adds little value or unnecessary additional performance.image"
Until you're having to copy it back after a failure.
Then you're contending for CPU, IO controller and disk head with the running Exchange server and Windows usual overheads.
These "solutions" are all very well until things break and then they fall apart very quickly.
Our point is that with these new technologies RAID isn't the only game in town and you can have multiple copies of data.
Which backup procedures are availabl, in addition to the application level replication of data? Much like EdgeSafe?
Which backup procedures are availabl, in addition to the application level replication of data?
My understanding is VSS is going to be the primary backup offering as streaming backups are no longer a part of Exchange 2010. It will be up to each backup vendor to provide a VSS Exchange solution.
That being said, I know internally we are looking to move away from traditional backups entirely and go with JBOD SATA with a DAG (multi DB replica) solution.
I still need to take backups in the event a user wishes to restore email that was deleted weeks ago and has passed the retention period time for the database deleted items.
In that case have you considered longer "deleted item retention" window? The default is 14 days. Maiking it longer will enable the users to help themselves.