Is DDBoost over Ethernet recommended for Solaris systems?
I've seen emc articles where in it mentions that performance impact is observed for such kind of a backup. Does DSP needs to be disabled for backups?
DDBoost is supported over Ethernet for Solaris systems.
There are known performance limitations with DSP for non-x86 based Solaris systems.
Please see the administration guide for further information and recommendations, specifically pages 16/17 relating to your query: