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The default settings of the macOS network stack are not optimized for network storage performance. Making these changes means that the Apple system will devote more resources to networking.
Along with disabling Apple extensions on the PowerScale cluster, this optimization can greatly improve listing large directories in macOS Finder.
The default setting of 3 can degrade performance with networks greater than 1 GbE
SMB signing is disabled by default, but given the performance implications, it is best to hard code this setting.
Reduce the incidence of password and connectivity problems.
SMB3 is the preferred protocol for macOS. If for some reason the client cannot connect by SMB3, it may be better to have the mount fail and trigger further investigation.
Having a macOS system try to connect by Wi-Fi when a wired connection is available will negatively impact performance.
Unless necessary, Spotlight search can lead to performance degradation on network shares with even small numbers of macOS clients.