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| LLT variables for better performance with I/O shipping | ||
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| Prev | Changes related to Veritas Cluster Server | Next |
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| LLT variables for better performance with I/O shipping | ||
|---|---|---|
| Prev | Changes related to Veritas Cluster Server | Next |
[Linux only]
You can now configure LLT variables to use multiple parallel ports for I/O shipping. You can get better performance with I/O Shipping by setting the following LLT variables.
Append the /etc/sysconfig/llt file with the following:
To enable parallel ports for I/O shipping:
LLT_NMULTIPORTS = number of ports
If you set the value to 0 or 1, CVM uses only one port for I/O shipping. Default value of this variable is 4. However you can set up to 8 parallel ports for I/O shipping.
To set number of threads per I/O shipping port:
LLT_RDLV_MTFACTOR = number of threads
If LLT_NMULTIPORTS = 0, the total number of threads for I/O shipping on the single port is 2. However, for performance reason, it is recommended that you set the number of threads to 8 or 16.
For more information, see Cluster Server 7.3 Configuration and Upgrade Guide - Linux.