Chapter 6 Accessing the Harmonic MediaGrid
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Harmonic MediaGrid Release 4.1
Using Multiple Client Ethernet Ports
Mount Options for Post Production Workflows
With release 3.1 and later, Harmonic MediaGrid provides improved performance in post-
production workflows. 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 Ethernet ports or NICs (Network Interface Card) can utilize all ports to
access data on Harmonic MediaGrid. This increases bandwidth and reduces latency.
To utilize multi-NIC support, all of the computer’s Ethernet ports must be connected to the same
Ethernet switch and must be allocated to the same IP subnet. Trunking or bonding must not be
enabled. Do not enable the feature unless the above requirements are met, or inconsistent
operation may result.
Refer to the following sections for instructions on enabling multi-NIC support for each operating
system:
Windows
Setting Windows FSD Properties
Macintosh
:
Linux
:
Enabling Multi-NIC Usage on Linux
Administrator Credentials and Security Permissions
Use the following user name and password when creating and mounting file systems and
directories, setting up Access Control Lists (ACLs), and performing other administrative tasks:
User name: mgadmin
Password: 1234
Harmonic recommends that the “mgadmin” user own all top-level directories, including the root
directory (named after the file system). Harmonic also recommends that specific domain users
own the directories and files.
About Access Control Lists
Both the Harmonic ContentManager application and the Harmonic MediaGrid Windows FSD for
Microsoft Windows Explorer allow you to create Access Control Lists (ACLs) to set user- and
group-level security for the various Harmonic MediaGrid files and directories. These ACLs are
stored on the ContentDirector. Once ACLs are created, when users attempt to access files,
Harmonic MediaGrid checks access against the ACL for each file. ACLs provide security
preferences for each individual Access Control Entry (ACE).
The Harmonic MediaGrid system receives user and group information from the Active Directory
or LDAP server. It also uses the domain controller to authenticate the users. The ContentManager
and the Harmonic MediaGrid Windows FSD access this user and group information when you use
either of them to create ACLs. The ContentManager application and Harmonic MediaGrid
Windows FSD also receive the ACLs when either mounts a Harmonic MediaGrid file system, and
then they contact the ContentDirector to resolve user names.
