To help new fellows to apply the first commit, we tagged some issues that good 
for the first. Please feel free to pick.

1、https://github.com/apache/incubator-paimon/issues/1132 [docs]

At present, there may be checkpoint and snapshot expiration mechanisms for the 
paimon table. Users do not understand how the number of small files comes from. 
We need to add a page to explain and provide suggestions.

2、https://github.com/apache/incubator-paimon/issues/1134 [docs]

The best way to have a basic view of paimon is to run a complete example in 
java api. But the document of java api now is not friendly because it's hard to 
get it work for new learner. Maybe we need a complete runnable example to help 
someone interested in donating code for paimon.

3、https://github.com/apache/incubator-paimon/issues/1144 [docs]

Docs about s3 storage is fuzzy, need a example explain how to link s3 storage. 
A doc page to demonstrate how to use s3 storage in paimon.

4、https://github.com/apache/incubator-paimon/issues/1146 [docs]

Paimon have two stage to complete writing and committing. While a checkpoint 
comes, we do something in prepareSnapshot, pass the commitable to the commit 
stage task. In snapshotStates phase, we write these message into a state. When 
acknowledge checkpoint, we call the commit to generate a new paimon snapshot.
We need a page to explain this process, explain how paimon works with flink.


Best,
Junhao

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