August 2017
Intermediate to advanced
1330 pages
56h 17m
English
Content preview from ServiceNow: Building Powerful Workflows
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Rotating and extending through sharding
Some other large tables, such as the system log, are not archived. Rather than moving records into a single other table based on a condition, sharding moves data into one of several tables based upon the date. The table that records get moved in to changes every 1 to 30 days or so, depending upon the configuration:
- Table rotation has a preset number of tables over which the data is spread. If the last is exhausted, it starts at the beginning again, overwriting the contents of the first table.
- Table extension has an ever-growing number of tables. When a new table is needed, the platform simply creates another table.
Either method will break up a very large set of data into more manageable chunks that ...
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