# Encoding
+ All modifications are collection of `KV`
+ **`{key}{version}`**
  + **`{version}`** is timestamp
+ **`short_value`** in the following table: value which is of short type (`<= 255` bytes)

| Column Family    | `Key`           | `Value`                     |
| :--------------- | :-------------- | :-------------------------- |
| `Default (data)` | `key,start_ts`  | `value`                     |
| `Lock`           | `key`           | `start_ts,primary_key, ttl` |
| `Write`          | `key,commit_ts` | `start_ts[,short_value]`    |
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