To configure multi-path iSCSI I/O for the initiator that uses the Dell NX1950 iSCSI targets, follow the directions for Microsoft Multi-path I/O from the Deployment section of this document above.
Basic Performance Results
The following performance data is not intended to be viewed as a comprehensive performance benchmark, but to provide a general performance overview for the Dell PowerVault NX1950 Networked Storage Solution.
Selected performance results are shown below, using a standard server-class network adapter, without receive-side scaling on the host. This configuration used two paths from one host, two I/O workers, simultaneously accessing two target volumes and a queue depth of 20. Each volume shared round-robin access across both paths.
The EqualLogic PS3800XV is an iSCSI target solution that includes a RISC-based, dual-controller disk subsystem with 15K RPM, 146GB SAS disk drives totaling 2.3 TB of raw capacity per module. It includes battery-backed and mirrored RAID cache, and its storage can be configured for RAID 5, RAID 10 or RAID 50.
EqualLogic’s iSCSI SAN solutions encompass advanced automated and intelligent management features, which continuously load balance and optimize the SAN to meet applications performance and capacity needs. In addition to the fault tolerant and fully redundant design of the PS Series, they also include an extensive set of data protection features such as snapshots, remote replication and fast fail back, providing the tools needed to setup a robust yet simple Data Protection and Disaster Recovery strategy. The PS Series offer multiple models with different drive capacities and speeds allowing for an efficient set up of different pools of storage to enable appropriate service levels for individual applications. EqualLogic has early on joined Microsoft Simple SAN program to provide, affordable, enterprise class, SAN solutions that are easy to setup manage and scale.
Target Configuration Steps
To install the EqualLogic PS3800XV solution from factory settings, a computer must be connected via the supplied serial cable to the PS3800XV array. The Quick Start Guide steps the administrator through the process of connecting all the cables properly and running the Group Manager Setup Utility to perform the basic system configuration.
EqualLogic also provides a Host Integration Tools CDROM that provides the VDS and MPIO drivers and the auto-snapshot manager to use with the EqualLogic array. These were installed from the CD on the iSCSI initiator hosts. If the EqualLogic Multi-path Device Specific Module (DSM) is installed, a system reboot will be required. The multi-path DSM is required for multi-path operations.
The Group Manager Setup Utility, run from a computer connected via serial cable or Ethernet connection to the PS3800XV array, asks the administrator to specify the IP address and related network settings for the primary Ethernet connection and the name of the logical group and its IP address. The utility program HyperTerminal was used to communicate with the array.
Launch Management Console
The management console is first launched via a 32-bit web browser. After logout, an option is displayed that provides a stand-alone JAVA application to use for the management console.
Before Volumes can be created on the array, the RAID policy must be set. The Quick Start Guide provides the step-by-step instructions to set the RAID policy.
The array began to apply the RAID policy of RAID-10 across all disks.
Volumes are created using the “Activities” panel of the management console.
Four volumes were created.
Make Volumes Ready for Use
The Volumes are ready for use as soon as the LUNs are created in the previous step.
Create iSCSI Targets
The targets are created when the iSCSI initiator addresses are supplied in the LUN creation step above. Access can be restricted to iSCSI initiators by their CHAP credentials, IP address, IQN or any combination of those three parameters.
Create Multi-path I/O for iSCSI Targets (optional)
The EqualLogic system will use multi-path I/O if at least two of its network interfaces have been enabled, and the iSCSI initiator is configured to use multi-path I/O. The EqualLogic system will automatically choose the paths to use for each I/O session. The EqualLogic system may vary the paths chosen between I/O sessions. When the iSCSI initiator is configuring multiple paths to the EqualLogic system, the iSCSI initiator will only see the “group” IP address. The EqualLogic system will handle the multi-pathing behind the “group” address.
Configure Security for iSCSI Targets (optional)
Make iSCSI Targets Ready for Use for iSCSI Initiators
No further steps are required to make the iSCSI targets ready to be accessed by the iSCSI initiators.