About Omneon MediaGrid - Harmonic Inc

Accessing the Omneon MediaGrid
Table 5. Mount Options (Continued)
Option Description
numberpreopen Specify the number of files to open in advance based on prediction logic. The default value
is 16.
Enabling Multi-NIC Usage on Linux
Computers with multiple 1-Gigabit Ethernet ports or NICs (Network Interface Card) can utilize all
ports to access data on Omneon MediaGrid. This increases bandwidth and reduces latency.
The Omneon MediaGrid system must be mounted, as described previously, to enable multi-NIC
usage. Use the following commands to enable multi-NIC support on a Linux system.
To enable multi-NIC usage:
1. To use specific interfaces, type the following command:
iflist=a:b
Where “a” is one interface to use, such as eth0, and “b” is another interface to use, such as eth1. Use a
colon “:” to separate the list of interfaces.
2. To use all interfaces, type the following command:
allnic
This command uses all of the system’s Ethernet interfaces.
The Linux FSD performs connection load balancing by adding routing table entries for each
ContentServer connection. Most Linux kernels ignore routing table entries when NICs are connected
to the same subnet.
3. Add the following lines to the /etc/sysctl.conf file to prevent this behavior from defeating
connection balancing:
net.ipv4.conf.default.arp_ignore = 1
net.ipv4.conf.default.arp_announce = 1
4. Restart the computer after making these additions.
Mount Options for Post Production Workflows
With release 3.1, MediaGrid provides improved performance in post-production workflows with
applications such as Autodesk Smoke*. To take advantage of these improvements, use the following
mount options:
noflushonclose,smallfilewindow=5000,maxsmallfilesize=50000000,readahead=12
For assistance with using these mount options, contact Technical Support.
Using Multiple Client Ethernet Ports
Computers with multiple 1 gigabit Ethernet ports or NICs (Network Interface Card) can utilize all
ports to access data on Omneon MediaGrid. This increases bandwidth and reduces latency.
166 Installation and Configuration Guide