sunny258

[functional module] WDR [Operation steps & amp; problem phenomenon] 1、gs_guc reload -N all -I all -c "enable_wdr_snapshot=on" 2、select create_wdr_snapshot(); 3、select * from snapshot.snapshot; [Screenshot information] openGauss=# select name,setting from pg_settings where name like '%wdr%'; name | setting -----------------------------+--------- enable_wdr_snapshot | on wdr_snapshot_interval | 60 wdr_snapshot_query_timeout | 100 wdr_snapshot_retention_days | 8 …

The installed openGauss database is always wrong, prompted by the figure below：Failed to obtain the environment variable PGHOST. Traceback (most recent call last): File “gaussdb/om/script/gs_install”, line295,in <module> DefaultValue.setActionFlagFile(“gs_install”) File “gaussdb/om/script/gspylib/common/Common.py”, line 2230,in setActionFlagFile Raise Exception(ErrorCode.GAUSS_518[“GAUSS_51802”]%“PGHOST”)

openGauss is an open source relational database management system, which deeply integrates Huawei's years of experience in the database field. Combined with the needs of enterprise scenarios, what deployment forms does it support in the enterprise architecture?

What are the main core technologies of the openGauss database?For example, availability (RPO / RTO), performance (TPS / QPS), DB4AI / AI4DB, etc.In addition, under the development trend of cloud development, how to ensure its security?

In recent years, open source software, and open source community construction is more popular, such as: mysql, postgresql, and openGauss database open source communities .So, as an individual, how to specifically participate in the open source community contribution?

What is the difference between openGauss and postgresql in the key technologies?Can you elaborate on this from the following points (including but not limited to): runtime model, transaction mechanism, data storage and organization, query optimizer, etc.