Grass Valley K2 Summit Storage Area Network Installation - Manual (Page 126)

About K2 SAN licensing
When you purchase your K2 SAN, Grass Valley sizes the SAN according to your requirements for
bandwidth and other considerations. Part of this sizing exercise is the application of the appropriate
license for your SAN.
The K2 SAN license enables bandwidth in increments. A SAN with no license allows the lowest
amount of bandwidth. With a license installed, additional bandwidth is allowed according to the
bandwidth increment count embedded in the license.
The SAN license is a Sabretooth license. The license is installed on K2 Media Servers with role of
iSCSI bridge. When you receive your SAN new from Grass Valley, the license is pre-installed. The
K2Config application references the license on the K2 Media Server. When you add a client you
specify its bandwidth and the K2Config application subtracts this bandwidth from the amount
allowed by the license. The K2Config application reports when the total amount allowed is consumed
and then does not allow you to add any more clients.
If you do not already have the highest bandwidth license on an existing system and you need more
bandwidth and/or client connections, you can upgrade the license. You can replace your existing
license with a license that has a higher bandwidth increment count embedded. You must consult
with Grass Valley for a re-evaluation of your system design as part of the upgrade process. Some
systems can require additional disks to support the increased bandwidth enabled by the license
upgrade.
If you install K2 software version 7.3 or higher on K2 SAN with 1 GB iSCSI adapters (TOEs), no
license is required. This is because the default amount of bandwidth allowed for a K2 SAN with no
license is adequate for the maximum bandwidth needed for 1 GB iSCSI adapters.
About QOS on the K2 SAN
Grass Valley designs your system using Quality of Server (QOS) features for different categories
of client Input/Output (I/O) traffic, as follows:
• Real Time Input Output (RTIO) — Clients supporting record/play operations are guaranteed
I/Os with first priority.
• Non-Realtime Input Output — Clients that are not real-time, such as FTP servers, share an I/O
pool that is separate from the real-time I/Os. The non-realtime clients can also temporarily use
real-time I/Os when those I/Os are not being used by real-time clients.
• Reserved Input Output (RVIO) — Clients that have specific I/Os requirements are each assigned
their own portion of the I/O pool. This guarantees the client has the I/Os it requires and also
prevents the client from exceeding its designed amount. These I/Os are reserved only while the
client is powered up. If the client is shutdown, the client's reserved I/Os become available in the
I/O pool for use by other clients.
The exact QOS values for your K2 SAN are calculated by Grass Valley to meet your workflow
requirements. When you operate your K2 SAN within the bounds of those requirements you should
have no bandwidth problems, even during peak bandwidth events. If your workflow requirements
change, allow Grass Valley to re-calculate your QOS values. Some versions of K2 software have a
RVIO calculator in the K2Config application. Do not use the RVIO calculator to change your RVIO
126 K2 SAN Installation and Service Manual 18 November 2010
Configuring and licensing the K2 SAN