Руководство По Обслуживанию для Cisco Headend System Release 2.7
Chapter 2 Optimize Your System Performance for Downloads and Staging
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Notes:
If you have multiple bootloaders, apply this procedure to the bootloader that
contains the CableCARD module images.
If the CableCARD module images are split across mutliple bootloaders,
apply this procedure to the bootloader with the largest ACCT value.
Important: If the OOB CVT message cycle time is greater than 3 times the
bootloader cycle time, you do not need to change the OOB CVT cycle time.
4 Convert the number to seconds.
Example: 4:48 is equal to 288 seconds.
5 Calculate the optimal cycle time for insertion of OOB CVT messages by dividing
the number in half and adding sixty seconds.
Example: (288 seconds/2) + 60 seconds = 204 seconds.
Example: (288 seconds/2) + 60 seconds = 204 seconds.
Change Your OOB CVT Message Cycle Time
The process to change your OOB CVT message cycle time is as follows:
1 Add an environmental variable to your DNCS .profile file.
2 Bounce the OSM process.
This process is described in detail in the remaining pages of this document.
1 Add an environmental variable to your DNCS .profile file.
2 Bounce the OSM process.
This process is described in detail in the remaining pages of this document.
Adding the OOB CVT Environment Variable to the .profile File
The first step in the process is to add the OSM_RF_CVT_PASSTHRU_SECONDS
The first step in the process is to add the OSM_RF_CVT_PASSTHRU_SECONDS
variable to your .profile file on the DNCS.
Before you begin, you need the OOB CVT message cycle time that you found in
Calculating the Optimum OOB CVT Message Cycle Time (on page 71).
1 Open an xterm window on the DNCS.
2 Type cd /export/home/dncs and press Enter. The /export/home/dncs directory
2 Type cd /export/home/dncs and press Enter. The /export/home/dncs directory
becomes the working directory.
3 Open the .profile file in a UNIX text editor.
4 Add the following line to the end of the .profile file:
4 Add the following line to the end of the .profile file:
export OSM_RF_CVT_PASSTHRU_SECONDS=[OOB CVT message cycle
time in seconds]
Note: Do not include the brackets [ ] in the variable.
Example: If your calculated OOB CVT message cycle time is 204 seconds, you
Note: Do not include the brackets [ ] in the variable.
Example: If your calculated OOB CVT message cycle time is 204 seconds, you
would type the following:
export OSM_RF_CVT_PASSTHRU_SECONDS=204
export OSM_RF_CVT_PASSTHRU_SECONDS=204
5 Save the file and close the text editor.
6 Log out of the DNCS.
7 Log back into the DNCS.
6 Log out of the DNCS.
7 Log back into the DNCS.