Specifications

Chapter 3: Using a Client in an ISIS System 35
Determining Total Throughput
Each ISIS engine within an ISIS environment
comprises sixteen ISIS storage blades which,
when organized into a single storage group, can
produce upwards of 240 or 300 MB/second of
aggregate bandwidth throughput.
The total bandwidth throughput within an ISIS
environment is based on the number of ISIS en-
gines connected to your system. Each client you
attach to the ISIS engine uses a certain amount
of that bandwidth depending on the type of me-
dia being played back.
Total ISIS Engine Bandwidth
Throughput
The following table shows the amount of avail-
able throughput offered by a single ISIS engine
grouped as one storage group.
While it is possible to create multiple storage
groups by grouping four or more storage blades,
the total throughput is lowered depending on
the number of storage blades in that storage
group.
Estimated Client Bandwidth Usage
The following table shows the estimated
amount of bandwidth usage based on the type
of media streaming from a single ISIS engine
grouped as one storage group.
Media Station|PT Client Performance
The following resolutions for Media Station|PT
have been tested and are supported on Avid
Unity ISIS media networks in both NTSC and
PAL. As enhancements to Avid Unity ISIS soft-
ware occur the number of resolutions will in-
crease:
•2:1
•3:1
•15:1
•20:1
• MPEG–2 Proxy for InterPlay
• HDV, DV50, and DV25
• IMX50 and IMX 30
• DNxHD145/120 (see note)
ISIS engine bandwidth throughput
Number of
ISIS Engines
DV25/50 &
IMX 30/50
Throughput
DXxHD 145/120
Throughput
1 300 MB/s 240 MB/s
Estimated ISIS engine bandwidth usage
Type of Media
Bandwidth
Usage
DV25 video 4 MB/sec
DV50 video 8 MB/sec
DNxHD 145 video 18 MB/sec
DNxHD 120 video 16 MB/sec
48 tracks of 48 kHz 24-bit audio 10 MB/sec
48 tracks of 48 kHz 16-bit audio 8 MB/sec