Online Verification

Online verification is unique to Ustore. It can effectively prevent logic damage on a page caused by encoding logic errors during running. By default, it is enabled for three modules (UPAGE:UBTREE:UNDO) . Keep it enabled on the live network, except in performance-sensitive scenarios.

To disable it, run the following command:

gs_guc reload -Z coordinator -Z datanode -N all -I all -c "ustore_attr=''"

To enable it, run the following command:

gs_guc reload -Z coordinator -Z datanode -N all -I all -c "ustore_attr='ustore_verify_level=fast;ustore_verify_module=upage:ubtree:undo'"

Parent topic: Best Practices of Ustore

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