You can now launch Amazon Redshift clusters on second-generation Dense Storage (DS2) instances. DS2 has twice the memory and compute power of its Dense Storage predecessor, DS1 (formerly DW1), and the same storage capacity. DS2 also supports Enhanced Networking and provides 50% more disk throughput than DS1. On average, DS2 provides 50% better performance than DS1, but is priced the same as DS1. To move from DS1 to DS2, simply restore a DS2 cluster from a snapshot of a DS1 cluster of the same size.
from What's New from Amazon Web Services http://ift.tt/1f1PsMA
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