Product specifications

Redistributing Data
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After 20 configuration changes, the Workspaces page displays a warning to perform a full redistribution. You can
manually initiate a Full Redistribution at any time using the Workspaces page in the Management Console. If you do
not do so, the system continues to function, but the affected Workspaces, and System Status Panel general status will
both remain at Warning until a full redistribution is performed. For more information on performing a full
redistribution, see “Performing a Full Redistribution” on page 84
.
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After 30 configuration changes without a full redistribution, the system will perform a full redistribution
automatically. This could significantly reduce system performance until the redistribution operation has
completed.
Redistribution Guidelines
• The ISIS | 7500 and ISIS | 5500 support add, remove, and full redistributions under load.
• The ISIS | 2500 supports add redistributions under load.
- A load condition exists when the Workspace has active clients (reading and writing to the Workspace).
- A no load condition exists when a Workspace has inactive clients (the Workspace is mounted but clients are
not performing reads or writes).
• ISIS | 2500 systems do not support “remove” or “full” redistribution of Storage Managers (Engines) to a
Storage Group.
• When redistributing under load, allow the redistribution to complete before initiating a second redistribution.
• System performance can degrade significantly during redistribution in a Storage Group with the maximum
client count. Reducing the number of clients allows the active clients using the Storage Group to function
normally, with successful playback and captures. Perform redistributions during periods of light client activity,
or reduce the overall load if client performance degrades (for example, the client experiences dropped frames,
underruns, and failed captures). Limitations on expected client performance during redistribution include the
following:
- Reducing audio tracks from 8 to 4 during playback might be required during redistribution. (Normal
operation supports 2 streams of video 8 tracks of audio.)
- Reducing the number of video streams from 2 to 1 might be required during redistribution. (Normal
operation supports 2 streams of video.)
You can suspend and resume a redistribution as needed. See the Avid ISIS Performance Guide for more
information.
• The amount of time a redistribution takes depends on whether the Workspace is in a load or a no load condition,
whether you are adding or removing a Storage Manager, and how much data in the Storage Group must be
redistributed. For more information on redistribution times, see the Avid ISIS Performance Guide.
• Do not physically remove a Storage Manager until it has been removed from the Storage Group, the
redistribution is complete, and it has been unbound as a Storage Manager.
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If you physically remove a Storage Manager from the shared storage network before redistribution is
complete, or if you physically remove more than one Storage Manager from a Storage Group before
performing a redistribution, data loss can occur.
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If you turn off any of the Engines before redistribution is complete, data loss can occur.