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https://dev.mysql.com/doc/refman/8.0/en/gis-class-multicurve.html
A MultiCurve is simple if and only if all of its elements are simple; the only intersections between any two elements occur at points that are on the boundaries of both elements. A MultiCurve boundary is obtained by applying the “mod 2 union ... A ...
https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipolygon.html
A MultiPolygon has no two Polygon elements that cross (crossing is also forbidden by the previous assertion), or that touch at an infinite number of points. A MultiPolygon is a MultiSurface object composed of Polygon elements. MultiPolygon Examples ...
https://dev.mysql.com/doc/refman/8.0/en/gis-class-polygon.html
The rings in the boundary of a Polygon may intersect at a Point, but only as a tangent. A Polygon has an interior that is a connected point set. A Polygon is a planar Surface representing a multisided geometry. It is defined by a single exterior ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-cloning.html
For Group Replication, note the following key points and differences: The donor (an existing group member) and the recipient (the joining member) must have the clone plugin installed and active. Prior to MySQL 8.0.37, cloning required that donors ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-consistency-guarantees.html
Although the Transaction Synchronization Points section explains that conceptually there are two synchronization points from which you can choose: on read or on write, these terms were a simplification and the terms used in Group Replication are: ...The consistency level can have different affects on read-only and read/write transactions processed by the group as demonstrated in this ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-instances.html
log_bin=binlog log_slave_updates=ON binlog_format=ROW master_info_repository=TABLE relay_log_info_repository=TABLE transaction_write_set_extraction=XXHASH64 Group Replication Settings At this point the option file ensures that the server is ... This ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-enterprise-backup.html
For example: s3> rm -rf /var/lib/mysql/* If the system variables innodb_data_home_dir, innodb_log_group_home_dir, and innodb_undo_directory point to any directories other than the data directory, they should also be made empty; otherwise, the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-failure-detection.html
In a replication group, each member has a point-to-point communication channel to each other member, creating a fully connected graph. Group Replication’s failure detection mechanism is a distributed service which is able to identify that a ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions-for-new-primary.html
When you set a timeout, it also prevents new transactions starting on the primary from that point on. group_replication_set_as_primary() Appoints a specific member of the group as the new primary, overriding any election process. When you set a ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-responses-failure-expel.html
If a suspect member becomes active only after the suspicion times out and is able to resume communications, it receives a view where it is expelled and at that point realises it was expelled. You can use group_replication_autorejoin_tries, which is ... You can use the group_replication_member_expel_timeout system variable, which is available from MySQL 8.0.13, to allow additional time between the creation of a suspicion and the expulsion of the suspect ...