Administrator Guide

To enable FTP on a NAS cluster:
1. Click Group, expand Group Conguration, and select the NAS cluster.
2. Click the Advanced tab.
3. In the NAS Cluster Access panel, select the Enable FTP Access checkbox.
Troubleshooting Performance Issues
To eectively manage your storage performance, follow these basic steps to troubleshoot issues:
• Fix any failed hardware components in the Dell storage array:
– Ensure that the array is fully populated (drives, controllers, and power supplies).
– Replace any failed disks or failed control modules.
• Congure all network interfaces:
– Make sure all the network interfaces on the group members are congured and functional.
– Congure data center bridging (DCB) on your network to make use of iSCSI.
• Fix or upgrade network hardware:
– Correct any network hardware problems that are causing poor performance.
– Fix switches or add network bandwidth, if needed.
– Add new hardware for better performance.
• Fix or upgrade server hardware:
– Correct any server hardware problems that are causing poor performance.
– Add memory, update drivers or network adapters, or use multipathing I/O, if needed to improve performance.
• Optimize applications:
– Correct any application behavior that is causing poor performance.
The goal is to reduce the load on the group. For example, be sure database volumes are provisioned correctly. You might want
to place data and log les on dierent volumes.
• Optimize your PS Series group conguration:
– Verify that your pools have sucient capacity by adding members.
– Verify that your RAID policy is appropriate for a group member. For more information about RAID policies on PS Series
systems, review the Dell Technical Report entitled PS Series Storage Arrays: Choosing a Member RAID Policy, which you can
download from the following location: http://en.community.dell.com/dell-groups/dtcmedia/m/mediagallery/19861480.
– Use higher-performing disk drives.
– Ensure that all group members have the latest PS Series rmware.
Server and Application Performance Recommendations
You might be able to improve performance by following these general recommendations:
• Make sure you have sucient server memory. Adding memory can decrease the read I/O load on the storage.
• Make sure you have the latest drivers for your operating system.
• Add high-performance network interfaces or host bus adapters to servers.
• Consider using multipathing (or MPIO), which provides a high-performance and highly available path between a server and
storage. Use the Dell EqualLogic Host Integration Tools for a multipathing solution.
• Make sure the server Ethernet ports, PCI bus, and CPU are rated for the workload.
• If the server is a clustered computer, isolate cluster network trac from iSCSI storage trac. Check for other network trac
interference.
• Make sure the application is congured properly so that I/O is performed eciently.
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