Novell ZENWORKS LINUX MANAGEMENT 7.2 IR2 - ADMINISTRATION GUIDE 09-25-2008, Руководство администратора

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422 Novell ZENworks 7.2 Linux Management Administration Guide
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ZENworks Multicast bundles use an image that is taken previously from a device and is stored
on an imaging server. The image is sent to multiple devices at one time to re-image them, rather
than sent one time for each device, thus saving on network bandwidth usage. For example, if
you have 10 devices in the multicast session and the image is 3 GB in size, your network
experiences 3 GB of network traffic to image all 10 devices. Without multicasting, the network
experiences 30 GB of network traffic.
For multicasting to work properly, all routers and switches on the network must have their
multicast features configured. Otherwise, multicast packets might not be routed properly.
File path: The location on the imaging server where the image file to be used by the
ZENworks Multicast bundle is stored.
File set: File sets are assigned to the current ZENworks Image bundle using this File set field.
File sets are defined on the imaging server from the base image using the Image Explorer
utility, which can be run on a Windows device from a Linux server running Samba. The Image
Explorer utility is located at
/opt/novel/zenworks/zdm/winutils/ImgExp.exe
on the Linux server.
When you define a file set using Image Explorer, you specify files and directories to be
excluded from the image. Thus, a file set is a subset of the original image that excludes the files
you select in Image Explorer. A separate image file is not created for the file set; instead, a file
set contains internal attributes representing the excluded information. Therefore, even though a
file set does not exist as a separate, physical image file, it is accessed as though it is, placing the
image on the receiving device, minus the excluded files.
For example,
device1image.zmg is the image file on your imaging server. You use Image
Explorer to determine which data to exclude and assign this to a file set number, such as 2.
When a device assigned to this ZENworks Image bundle boots, it is imaged with the smaller
version (file set 2) of
device1image.zmg
.