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Where the Cloud Touches Down: Simplifying Data Center Infrastructure Management

Thursday, July 25, 2013
10:00 AM PT/1:00 PM ET

In most data centers, DCIM rests on a shaky foundation of manual record keeping and scattered documentation. OpManager replaces data center documentation with a single repository for data, QRCodes for asset tracking, accurate 3D mapping of asset locations, and a configuration management database (CMDB). In this webcast, sponsored by ManageEngine, you will see how a real-world datacenter mapping stored in racktables gets imported into OpManager, which then provides a 3D visualization of where assets actually are. You'll also see how the QR Code generator helps you make the link between real assets and the monitoring world, and how the layered CMDB provides a single point of view for all your configuration data.

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A Network Computing Webinar:
SDN First Steps

Thursday, August 8, 2013
11:00 AM PT / 2:00 PM ET

This webinar will help attendees understand the overall concept of SDN and its benefits, describe the different conceptual approaches to SDN, and examine the various technologies, both proprietary and open source, that are emerging. It will also help users decide whether SDN makes sense in their environment, and outline the first steps IT can take for testing SDN technologies.

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How-To: Plan an iSCSI SAN

With the jumbo frames, ensure all the devices on your iSCSI network--including switches, initiators and targets--are configured to use the same maximum frame size. There is no standard, maximum jumbo-frame size, and we've seen equipment supporting frame sizes from 9,000 bytes to 16 KB.

If your servers or disk arrays are set to a larger maximum frame size than your switches, your iSCSI system will appear to be working perfectly until you start doing large data transfers that exceed the switch's maximum frame--then disk I/O errors will start cropping up.

Stick Your TOE in the Water

Although most current operating systems support iSCSI software initiators that let you use any Ethernet card to connect your servers to an iSCSI disk array, don't just use any old Gigabit Ethernet card for your iSCSI connection. Ethernet cards designed for workstations, for example, use a 32-bit PCI bus with just more than a gigabit of bandwidth that gets shared with other devices on the bus. A server Ethernet card uses the much faster PCI-X or PCI-Express bus and performs onboard TCP/IP checksum/off-load, which reduces the CPU's iSCSI traffic processing. Broadcom's NetXtreme controller chips, which come with most server motherboards, also do checksum/off-load.

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