• 1. Snapshot isolation: 快照隔离 | 快照隔离级别
• 2. Snapshot Isolation Level: 快照隔离级别
• 3. SET TRANSACTION ISOLATION LEVEL SNAPSHOT: 已提交读快照级

• 1.Percolator was designed to provide cross-row, cross-table ACID-compliant transactions via " snapshot isolation" since many threads on many machines need to transform the repository.
  Percolator通过“ 快照隔离”实现了遵从ACID的跨行及跨表事务，从而满足多线程在多台服务器上对文档库进行转换操作的需求。
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• 2.All testing should happen in isolation from the production environment, preferably with a snapshot of production data so you can better exercise the new environment.
  所有测试都应该与生产环境隔离，最好使用一个生产数据快照，以便您能够更好地测试新环境。
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• 3.SQL 2005 has snapshot-based isolation levels that prevent readers from blocking writers or writers from blocking readers without allowing dirty reads.
  SQL 2005有一个 基于快照的隔离级别 ，它能在不允许“脏读”的情况下避免数据读取阻塞数据写入，或者数据写入阻塞数据读取。
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