# Tiflash Key Features: Consistency Read (Continued...)

![left](./student-guide/diagram/TiFlashConsistencyRead07_aa_001_20220513.png)

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Next, at the T5 moment, TiFlash waited until the raft log index of key = 1 was 125, and confirmed that the value of key = 1 must have been copied, so it read the value of key = 1, but found that there are two versions, 100 and 200. Since the read occurred in T1, T2 is discarded version of 200, return 100.