OR1, the OpenSearch Optimized Instance family, now doubles the max allowed storage per instance. OR1 also expands availability to four additional regions- Canada Central, EU (London), and Asia Pacific (Hyderabad, Seoul). OR1 delivers up to 30% price-performance improvement over existing instances (based on internal benchmarks), and uses Amazon S3 to provide 11 9s of durability. The new OR1 instances are best suited for indexing-heavy workloads, and offers better indexing performance compared to the existing memory optimized instances available on OpenSearch Service.
Source:: Amazon AWS