vrepl: vtctld Migrate command #5653
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deepthi
approved these changes
Jan 6, 2020
go/vt/vtctl/vtctl.go
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| @@ -311,6 +311,9 @@ var commands = []commandGroup{ | |||
| {"Reshard", commandReshard, | |||
| "[-skip_schema_copy] <keyspace.workflow> <source_shards> <target_shards>", | |||
| "Start a Resharding process. Example: Reshard ks.workflow001 '0' '-80,80-'"}, | |||
| {"Migrate", commandMigrate, | |||
| "[-cell=<cell>] [-tablet_types=<tablet_types>] -workflow=<workflow> <source_keyspace> <target_keyspace> <table_specs>", | |||
| `Start a table(s) migration, table_specs is a list of tables or the tables section of the vschema for the target keyspace. Example: '{"t1":{}, "t2":{}}`}, | |||
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Can you give a more complex example in the help text?
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| if *workflow == "" { | ||
| return fmt.Errorf("a workflow name must be specified") | ||
| } |
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nit: I would check this first, before checking the args.
| CreateDdl: "copy", | ||
| }) | ||
| } | ||
| return wr.Materialize(ctx, ms) |
Signed-off-by: Sugu Sougoumarane <[email protected]>
Signed-off-by: Sugu Sougoumarane <[email protected]>
Signed-off-by: Sugu Sougoumarane <[email protected]>
Signed-off-by: Sugu Sougoumarane <[email protected]>
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We reuse the Materialize command to build the command to migrate tables from one keyspace to another. This works from any keyspace to any keyspace, and the MigrateReads and MigrateWrite commands can be used to migrate traffic.