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Storage Foundation for Oracle® RAC 8.0.2 Configuration and Upgrade Guide - Linux

Last Published: 2023-06-05

Product(s): InfoScale & Storage Foundation (8.0.2)

Platform: Linux

Enabling LLT ports in firewall

You can use any firewall tool to enable the network ports.

While enabling ports make sure that:

No other application is using the LLT consumable network ports (50000 to 50006).
These ports are enabled in security groups in case of InfoScale installations in any cloud environment.

By default, LLT uses 50000 to 50001 port range for clustering and 50002 to 50006 for I/O shipping sockets.

Note:

In cloud for DNS based configuration, if the IPs cannot be connected then the LLT waits for 2 minutes 35 seconds; after which it gets failed. Thus, after reboot one of the nodes fail to join the cluster.

Note:

In Cloud, specifically for a different AZs, NIC IP's are NATed. The LLT drops the connection, as the packet destination may not see the actual source IP.

Enabling ports using iptables

Ingress table:

iptables -A INPUT -p udp --dport 50000:50006 -j ACCEPT

Egress table:

iptables -A OUTPUT -p udp --sport 50000:50006 -j ACCEPT

Enable ports in the etc/llttab file

link eth1 udp - udp 50000 - 192.168.10.1 -
link eth2 udp - udp 50001 - 192.168.11.1 -

You can also use the following tunables to choose the number of sockets per link. By default 4 sockets are created for each link

Tunable	Description
set-udpports	Changes the port range to be used for I/O shipping if you do not want to use port range 50002 and onwards. Usage: set-udpports <initial_port_number> Example: set-udpports 60000 In this case, LLT uses the port 50000 and 50001 for clustering and 60000 and the subsequent port numbers for I/O shipping.
set-udpthreads	Specifies how many threads per socket needs to be created. Usage: set-udpthreads <number of threads per socket> Example: set-udpthreads 3
set-udpsockets	Specifies how many sockets per link needs to be created. Usage: set-udpsockets <number of sockets per link> Example: set-udpsockets 6

Tunable

Description

set-udpports

Changes the port range to be used for I/O shipping if you do not want to use port range 50002 and onwards.

Usage: set-udpports <initial_port_number>

Example: set-udpports 60000

In this case, LLT uses the port 50000 and 50001 for clustering and 60000 and the subsequent port numbers for I/O shipping.

set-udpthreads

Specifies how many threads per socket needs to be created.

Usage: set-udpthreads <number of threads per socket>

Example: set-udpthreads 3

set-udpsockets

Specifies how many sockets per link needs to be created.

Usage: set-udpsockets <number of sockets per link>

Example: set-udpsockets 6