Configuring LLT manually


Configuring LLT manually
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VCS uses the Low Latency Transport (LLT) protocol for all cluster communications as a high-performance, low-latency replacement for the IP stack. LLT has two major functions.

It handles the following tasks:

Traffic distribution
Heartbeat traffic

To configure LLT over Ethernet, perform the following steps on each node in the cluster:

Set up the file /etc/llthosts.

See Setting up /etc/llthosts for a manual installation.
Set up the file /etc/llttab.

See Setting up /etc/llttab for a manual installation.
Edit the following file on each node in the cluster to change the values of the LLT_START and the LLT_STOP environment variables to 1:

/etc/sysconfig/llt

You can also configure LLT over UDP.

See Using the UDP layer for LLT.

You can also configure LLT over RDMA.

See Using LLT over RDMA: supported use cases .

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