luoyuxia commented on code in PR #1675:
URL: https://github.com/apache/fluss/pull/1675#discussion_r2354575856


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website/docs/maintenance/configuration.md:
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@@ -135,7 +135,7 @@ during the Fluss cluster working.
 | kv.rocksdb.files.open                             | Integer    | -1          
                  | The maximum number of open files (per  bucket of table) 
that can be used by the DB, `-1` means no limit. The default value is `-1`.     
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                          
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                |
 | kv.rocksdb.log.max-file-size                      | MemorySize | 25mb        
                  | The maximum size of RocksDB's file used for information 
logging. If the log files becomes larger than this, a new file will be created. 
If 0, all logs will be written to one log file. The default maximum file size 
is `25MB`.                                                                      
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                            
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                |
 | kv.rocksdb.log.file-num                           | Integer    | 4           
                  | The maximum number of files RocksDB should keep for 
information logging (Default setting: 4).                                       
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                              
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                |
-| kv.rocksdb.log.dir                                | String     | (None)      
                  | The directory for RocksDB's information logging files. If 
empty (Fluss default setting), log files will be in the same directory as the 
Fluss log. If non-empty, this directory will be used and the data directory's 
absolute path will be used as the prefix of the log file name. If setting this 
option as a non-existing location, e.g `/dev/null`, RocksDB will then create 
the log under its own database folder as before.                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                |
+| kv.rocksdb.log.dir                                | String     | 
FLUSS_HOME/log/rocksdb               | The directory for RocksDB's information 
logging files. If empty (Fluss default setting), log files will be in the same 
directory as the Fluss log. If non-empty, this directory will be used and the 
data directory's absolute path will be used as the prefix of the log file name. 
If setting this option as a non-existing location, e.g `/dev/null`, RocksDB 
will then create the log under its own database folder as before.               
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                          
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                       |

Review Comment:
   Will it better to use `${FLUSS_HOME}/log/rocksdb` instead of 
FLUSS_HOME/log/rocksdb?
   ```suggestion
   | kv.rocksdb.log.dir                                | String     | 
`${FLUSS_HOME}/log/rocksdb`   | The directory for RocksDB's information logging 
files. If empty (Fluss default setting), log files will be in the same 
directory as the Fluss log. If non-empty, this directory will be used and the 
data directory's absolute path will be used as the prefix of the log file name. 
If setting this option as a non-existing location, e.g `/dev/null`, RocksDB 
will then create the log under its own database folder as before.               
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                               
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                  |
   ```



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