This PR optimizes some of the logic related to group commit:
1. Improved the error handling when there is insufficient WAL space during import.
2. Accounted for cases where the content length is negative during import.
3. Added missing error log printing in `group_commit_mgr.cpp`.
* When using stream processing frameworks like Flink with group commit mode enabled, the uncertain size of imported data makes such behavior prohibitive. Previously, to simplify the process, the error message for excessive data volume during streamload was combined with the one for group commit mode, leading to confusion for users when encountering errors indicating the data volume is too large during Flink imports. To address this issue, we are adjusting the logic: if a user employs stream processing imports like Flink with group commit mode enabled, we will automatically disable group commit mode, switching to the standard import mode instead. This is the essence of this PR.
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
Follow #17586.
This PR mainly changes:
Remove env/
Remove FileUtils/FilesystemUtils
Some methods are moved to LocalFileSystem
Remove olap/file_cache
Add s3 client cache for s3 file system
In my test, the time of open s3 file can be reduced significantly
Fix cold/hot separation bug for s3 fs.
This is the last PR of #17764.
After this, all IO operation should be in io/fs.
Except for tests in #17586, I also tested some case related to fs io:
clone
concurrency query on local/s3/hdfs
load error log create and clean
disk metrics
Use FE cluster token to auth stream load.
This auth is only open for be, and fe auth still only support http basic auth.
I will use this auth for mysql load to build a no-auth stream load from fe to be.
And this will avoid double auth in mysql load.
More information to see the design doc.
At present, the application of vlog in the code is quite confusing.
It is inherited from impala VLOG_XX format, and there is also VLOG(number) format.
VLOG(number) format does not have a unified specification, so this pr standardizes the use of VLOG
* Add streaming load feature. You can execute 'help stream load;' to see more information.
Changed:
* Loading phase of a certain table can be parallelized, to reduce the load job execution time when multi load jobs to a single table.
* Using RocksDB to save the header info of tablets in Backends, to reduce the IO operations and increate speeding of restarting.
Fixed:
* A lot of bugs fixed.
