| 摘要 |
<p>Techniques to perform an incremental backup of a large-scale distributed database, such as a massively parallel processing (MPP) database, are disclosed. In various embodiments, a set of table partitions each of which satisfies one or more criteria to be included in a current incremental backup is determined at backup time, at least in part by comparing a current table partition meta-information with corresponding meta-information from a prior backup. The table partitions in the set are included in the incremental backup, while other table partitions not in the set are not backed up. In some embodiments, certain tables are designated to be of a type such that existing records are not modified. Tables are partitioned in a manner that isolates changes, e.g., added rows, in a relatively few table partitions, leaving others unchanged and therefore able to be omitted from subsequent incremental backups.</p> |
