 | ||
| To tune the LLT variables for I/O shipping | ||
|---|---|---|
| Prev | Configuring parallel ports for I/O shipping | Next |
Append the /etc/sysconfig/llt file with the following value:
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.
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.
To get the total number of ports, including parallel ports, registered with LLT:
Use the lltstat -p command
Note that this command does not provide information about which ports used as parallel ports.
To get the number of ports used as parallel port for I/O shipping:
Use the lltstat -c command