System performance is directly related to the number of FMods connected to each HBA. The lower the HBA-to-FMod ratio, the higher the performance. For example, in the first table below, highest performance is achieved with a 1:5 HBA-to-FMod ratio, while lowest performance is achieved using a 1:20 HBA-to-FMod ratio. The numbers below assume a system fully populated with 80 FMods. The first table shows configuration information for the SGX-PCIE8SAS-E-Z HBA, and the second table shows configuration information for the SGX-SAS6-EXT-Z HBA.
Highest Performance Example
To achieve maximum performance on the SunStorage F5100 Flash Array, use zoning supported by Oracle’s Sun Storage Common Array Manager software.To configure this model, connect a separate HBA to each port of a given domain, divide the domain into four zones, and distribute FMods evenly across the zones. For example, install 20 FMods in SAS Expander 2, then create 4 zones, each containing 5 FMods. Scale this model to all four domains for maximum system performance.
Medium Performance Example
To achieve a blend of performance and HBA economy, use zoning supported by Sun Storage CAM software. To configure this model, connect two HBAs per domain, divide the domain into two zones, and distribute FMods evenly across the zones. For example, install 20 FMods in SAS Expander 2, then create two zones, each containing 10 FMods. Scale this model to all four domains for a blend of performance and HBA economy.
HBA Economy Example
When slots or HBAs are limited, connect one HBA per domain, and distribute your FMods evenly across the domains. This configuration enables domain mirroring if supported by the host.
Connect a maximum of 20 FMods per SG-XPCIE8SAS-EZ HBA. When this HBA includes two ports, you are still limited to 20 FMods per HBA.
Connect a maximum of 40 FMods per SGX-SAS-EXT-Z HBA. When this HBA includes two ports, you are still limited to 40 FMods per HBA.
HBAs can be installed in multiple hosts and connected to the same array.
Install HBAs in 8-lane PCI-E slots, if possible.
Use only Sun-supported HBAs with the SunStorage F5100 Flash Array. For the most recent list of supported HBA, see the SunStorage F5100 Flash Array Product Notes.
Connect only a single HBA to a single domain on the SunStorage F5100 Flash Array, when not using zoning.
Caution - Attempting to connect more than one HBA to a SAS expander or domain (without zoning) may result in data loss.
In instances where slot restrictions constrain the number of HBAs that can be used for connection to the array, the connection of the second HBA port may be used to obtain higher performance over single port connections. Note that due to host bus and HBA controller bandwidth limitations, for a given FMod count a single HBA with a dual port connection does not approach the performance of two HBAs with single port connections. For these configurations follow these guidelines:
For the SGX-PCIE8SAS-E-Z HBA:
FMod count should be split evenly across the two ports for best performance.
Each port must be connected to a different physical domain on the F5100.
Given the limitation of 20 FMods for this HBA card, this would limit each domain to 10 FMods assuming a balanced FMod configuration. A second HBA could be used to drive up to 20 FMods spread across the remaining two domains for a maximum of 40 total FMods in the array.
For the SGX-SAS6-EXT-Z HBA:
If connected to different domains, FMod count should be split evenly across the two ports for best performance
If desired, both ports may be connected to the same physical domain on the F5100 without zoning.