vreplication: clean-up copy_state correctly #5048
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* On delete of a row in _vt.vreplication, we should also cleanup the copy_state table, because it may have related rows. * Made workflow into a flag, but mandatory. Otherwise the number of unnamed arguments are too many and command becomes unreadable. * Added ability to read from _vt.copy_state using VReplicaionExec. Signed-off-by: Sugu Sougoumarane <ssougou@gmail.com>
Legacy mode vreplication will not create copy_state. So, we have to ignore the table not found error when deleting from copy_state. Signed-off-by: Sugu Sougoumarane <ssougou@gmail.com>
deepthi
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Aug 8, 2019
| @@ -1845,21 +1845,27 @@ func commandMigrateReads(ctx context.Context, wr *wrangler.Wrangler, subFlags *f | |||
| if *reverse { | |||
| direction = wrangler.DirectionBackward | |||
| } | |||
| return wr.MigrateReads(ctx, keyspace, workflow, servedType, cells, direction) | |||
| if *workflow == "" { | |||
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How does this affect vtctl SplitClone? should that return an workflow name that can be used for subsequent invocations of MigrateReads and MigrateWrites?
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vtctl SplitClone and VerticalSplitClone will also be deprecated. They won't work with MigrateReads and MigrateWrites. The replacement commands are Migrate and Reshard, which you'll see in the POC branch.
deepthi
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Aug 8, 2019
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…se needs to be updated to conform to that Signed-off-by: deepthi <deepthi@planetscale.com>
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the copy_state table, because it may have related rows.
of unnamed arguments are too many and command becomes unreadable.
Signed-off-by: Sugu Sougoumarane ssougou@gmail.com