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Target customers: big data O&M engineers. Features released: MaxCompute determines whether the storage tier of a table or partition can be changed from standard storage to infrequent access (IA) or long-term storage based on the default optimization policy and the last access time of the table or partition. The default optimization policy recommends that you change the standard storage tier of a table or partition that is not accessed in the previous 30 days to the IA storage tier and change the standard storage tier of a table or partition that is not accessed in the previous 180 days to the long-term storage tier. You can estimate the storage cost savings (catalog price) after the storage tier is changed. This helps you configure tiered storage policies.