Based on the provided documentation for `dnscluster syncall` command:

1. The purpose of using `dnscluster syncall` is to synchronize all DNS zone files across a cluster of servers.

2. When run, it will:

- Copy the serial number from each server in the cluster.

- Compare these serial numbers with those on other servers.

- Update any local zone file if necessary (i.e., when out-of-sync) by copying newer versions from other servers within the same DNS cluster.

3. This command is particularly useful for:

* Keeping all servers in a high-availability setup synchronised and ensuring availability even during planned maintenance or hardware failures.

* Automating routine tasks like backing up configuration data across multiple systems.

4. In cPanel-specific scenarios, this might be helpful when:

- Configuring load balancing with multiple web servers behind an LB (load balancer).

- Implementing failover procedures to ensure continuous service even if one server goes down.

* Automating routine tasks like backing up configuration data across multiple systems.

5. It's also relevant in cases where you're working within a larger infrastructure setup, such as:

- Cloud providers offering managed DNS services that support replication of zone files between servers for redundancy and failover purposes.

In summary: The `dnscluster syncall` command synchronizes all dns zones among the specified cluster members at once. It is especially useful when multiple cPanel or other compatible web hosts need to share common configuration data like A records, MX entries etc., ensuring consistency across different server setups while still allowing for easy management and failover procedures in case of any unexpected downtime situations happening within your IT infrastructure setup!

Cpanel download dns zone file