There is no clear instruction to manually modify partitions, when dynamic partition feature is enabled.
The user will be informed only after trying to modify the partition in the command line.
This PR adds instructions for converting dynamic and manual partition tables to each other
1. Add metrics to `used permits` and `waitting permits` for compaction.
It would be useful to monitor `permits` hold by all executing compaction tasks and waitting compaction task.
2. Add log which can be chosen by config for merge rowsets.
It would be helpful to track the process of rowsets merging for compaction task which lasts for a long time.
1. Support modify column type CHAR to TINYINT/SMALLINT/INT/BIGINT/LARGEINT/FLOAT/DOUBLE/DATE
and TINYINT/SMALLINT/INT/BIGINT/LARGEINT/FLOAT/DOUBLE convert to a wider range of numeric types (#4937)
2. Use template to refactor code of types.h and schema_change.cpp to delete redundant code.
A large number of small segment files will lead to low efficiency for scan operations.
Multiple small files can be merged into a large file by compaction operation.
So we could take the tablet scan frequency into consideration when selecting an tablet for compaction
and preferentially do compaction for those tablets which are scanned frequently during a
latest period of time at the present.
Using the compaction strategy of Kudu for reference, scan frequency can be calculated
for tablet during a latest period of time and be taken into consideration when calculating compaction score.
mainly includes:
- `OLAP_SCAN_NODE` profile layering: `OLAP_SCAN_NODE`,`OlapScanner`, and `SegmentIterator`.
- Delete meaningless statistical values. mainly in scan_node.cpp.
- Increase `RowsConditionsFiltered` statistical, split from `RowsDelFiltered`, the meaning is the number of rows filtered by various column indexes, only in segment V2.
- Modify the document based on the above, and enhance readability.
* Update fe-idea-dev.md
use `brew install thrift@0.9` to install thrift 0.9.3.1
`brew edit thrift090 | head` shows thrift@0.9 uses thrift 0.9.3.1
* [Refactor] Remove the unnecessary if statement
Future<?> submit(Runnable task)
Submits a Runnable task for execution and returns a Future representing that task. The Future's get method will return null upon successful completion.
The name and another config name are close to each other and are indistinguishable.
So this pr modify the name.
The document description has also been changed
Support persistence of configuration items modified at runtime via HTTP API.
```
FE:
GET /api/_set_config?key=value&persist=true
BE
POST /api/update_config?key=value&persist=true
```
The modified config will be saved in `fe_custom.conf` or `be_custom.conf`.
And when process starts, it will load `fe.conf/be.conf` first, then `fe_custom.conf/be_custom.conf`.
This is the last PR of proposal #4308
1. Add a new FE config `enable_http_server_v2` to enable new HTTP Server implementation. The default value is false.
2. Add a new FE config `http_api_extra_base_path` so that we can set base path for Frontend UI.
3. Refactor the new HTTP API response body. The return http status code is always 200, and using internal code in response body to indicate the certain error.
Support new synatx CREATE TABLE [IF NOT EXISTS] [db_name].table_name AS [db_name2].table_name2;
to create a new table from existed table with same table schema.
ISSUE: #4355
#4619
Add time_round functions that provides `time_floor` & `time_ceil` at each time unit.
Fix two related bugs.
- #4618
- Fix `struct TimeInterval` to use `int64_t` instead of `int32_t`, in case when the second diff overflow
