# Distributed Transactions - Cont'd

+ **`Write CF:`** When a user writes a row of data, if the length of that line of data is less than 255 bytes, it will be stored in Write CF; otherwise, the row of data will be stored in Default CF
+ **`Default CF:`** is used to store data over 255 bytes in length

![`smart`](PercolatorTiKV02_aa_002_20220511.png)

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