Teradata Corp., an Ohio-based public company with about 1,000 employees in Rancho Bernardo, said it completed the acquisition of RainStor, a business specializing in online big data archiving.

Terms of the transaction weren’t revealed because they are not material, the company said.

This is Teradata’s fourth big data-related acquisition this year. The others were Revelytix, Hadapt, and Think Big Analytics. The company said the acquisitions demonstrate its focus on helping customers derive meaningful value from all their data.

The deal includes Rainstor’s intellectual property, and the majority of its employees, who will remain in the company’s two offices in San Francisco and Gloucester, U.K.

For the nine months ended Sept. 30, Teradata reported revenue of $1.97 billion, up 2 percent from $1.92 billion for the same period of 2013.