Release Note 1.1.0

Release Note 1.1.0

Upgrade Notes

1. the enable_vectorized_engine session variable is set to true by default

   So that all queries will be executed in vectorized query engine.

2. the BE binary file renames to doris_be

   If you have previously relied on the process name for cluster management and other operations, please pay attention to modifying the relevant scripts.

3. Segment v1 format will no longer be supported in the next version, please complete the data conversion in version 1.1.

Features

1. Support Random Distribution (Experimental)

This feature is suitable for scenarios such as logs. In this distribution method, the data in an load task will be randomly written into a single tablet to reduce data fanout during the loading process, reduce resource overhead and improve load stability.

2. Support for creating Iceberg external table

Supports creation of Iceberg external tables and query data on it. Supports automatic synchronization of all Iceberg tables in a database. http://doris.apache.org/docs/ecosystem/external-table/iceberg-of-doris.html

3. Support the compression method of a table

The default compression method for Doris table is LZ4F. Optionally specify the compression method as ZSTD for higher compression ratios.

Improvements

1. More comprehensive vectorization engine support

1. Support vectorized implementation of all built-in functions.
2. The storage layer is vectorized and supports dictionary optimization for low-cardinality string columns.
3. Optimize and fix a large number of performance and stability issues of vectorization engines.

Compared with the 0.15 and 1.0 version, there is a significant improvement: http://doris.apache.org/docs/benchmark/ssb.html

2. Optimize the compaction logic

Optimize the rowset selection strategy, quickly merge the newly imported data versions, greatly reduce the number of data versions, and improve query performance.

For 20 concurrency load task, 5000 rows per job, 1s interval, the compaction score is stable below 50.

3. Optimize the read speed of Parquet and ORC files

Using multi-threaded prefetching, the reading speed is increased by 5X.

4. Safer metadata checkpoint

Through the double-check of image files generated after metadata checkpoint and the feature of retaining historical image files, the problem of metadata corruption caused by image file errors is solved.

Bug Fix

1. Fix the problem that the data cannot be queried due to the missing data version.(Serious)

This issue was introduced in version 1.0 and may result in the loss of data versions for multiple replicas. If you encounter this problem, you can try to fix it with #9266.

2. Fix the problem that the resource isolation is invalid for the resource usage limit of loading tasks (Moderate)

In 1.1, the broker load and routine load will use Backends with specified resource tags to do the load.

3. Use HTTP BRPC to transfer network data packets over 2GB (Moderate)

In the previous version, when the data transmitted between Backends through BRPC exceeded 2GB, it may cause data transmission errors.

Behavior Changes

1. Query layer and storage layer vectorization is enabled by default

2. Disable Mini Load

The /_load interface is disabled by default, please use the /_stream_load interface uniformly. Of course, you can re-enable it by turning off the FE configuration item disable_mini_load.

The Mini Load interface will be completely removed in version 1.2.

3. Completely disable the SegmentV1 storage format

Data in SegmentV1 format is no longer allowed to be created. Existing data can continue to be accessed normally. You can use the ADMIN SHOW TABLET STORAGE FORMAT statement to check whether the data in SegmentV1 format still exists in the cluster. And convert to SegmentV2 through the data conversion command

Access to SegmentV1 data will no longer be supported in version 1.2.

4. Limit the maximum length of String type

#8567 In previous versions, String types were allowed a maximum length of 2GB. In version 1.1, we will limit the maximum length of the string type to 1MB. Strings longer than this length cannot be written anymore. At the same time, using the String type as a partitioning or bucketing column of a table is no longer supported.

The String type that has been written can be accessed normally.

5. Fix fastjson related vulnerabilities

#9763

6. Added ADMIN DIAGNOSE TABLET command

Used to quickly diagnose problems with the specified tablet.

Thanks

Thanks to everyone who has contributed to this release:

@adonis0147 @airborne12 @amosbird @aopangzi @arthuryangcs @awakeljw @BePPPower @BiteTheDDDDt @bridgeDream @caiconghui @cambyzju @ccoffline @chenlinzhong @daikon12 @DarvenDuan @dataalive @dataroaring @deardeng @Doris-Extras @emerkfu @EmmyMiao87 @englefly @Gabriel39 @GoGoWen @gtchaos @HappenLee @hello-stephen @Henry2SS @hewei-nju @hf200012 @jacktengg @jackwener @Jibing-Li @JNSimba @kangshisen @Kikyou1997 @kylinmac @Lchangliang @leo65535 @liaoxin01 @liutang123 @lovingfeel @luozenglin @luwei16 @luzhijing @mklzl @morningman @morrySnow @nextdreamblue @Nivane @pengxiangyu @qidaye @qzsee @SaintBacchus @SleepyBear96 @smallhibiscus @spaces-X @stalary @starocean999 @steadyBoy @SWJTU-ZhangLei @Tanya-W @tarepanda1024 @tianhui5 @Userwhite @wangbo @wangyf0555 @weizuo93 @whutpencil @wsjz @wunan1210 @xiaokang @xinyiZzz @xlwh @xy720 @yangzhg @Yankee24 @yiguolei @yinzhijian @yixiutt @zbtzbtzbt @zenoyang @zhangstar333 @zhangyifan27 @zhannngchen @zhengshengjun @zhengshiJ @zingdle @zuochunwei @zy-kkk

[morningman]

Not yet. we just test it with TPCDS 1000. It works with 96/99 SQL, but no performance tunning. This may be done in later releases.

[vkingnew]

This edtion have a full test of TPC-DS ?