第二个问题是避免过度使用数据库或计算性资源，防止生成重复数据。
The second problem was avoiding excessive use of database or computational resources in generating duplicate data.
德拉反复数了三次，还是一元八角七，而第二天就是圣诞节了。
One dollar and eighty-seven cents. And the next day would be Christmas.
第二种容量管理办法可近似地认为是通过重复数据删除或数据压缩来减少主存储磁盘上的数据。
The second capacity management approach to consider is reducing data on primary disk storage via data deduplication or data compression.
应用推荐