octoleo/gh-ost
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #951 from timvaillancourt/add-server-cmd-hosts

Browse Source 
Add 'applier' and 'inspector' commands to server
This commit is contained in:
Tim Vaillancourt 2021-04-04 18:55:57 +02:00 committed by GitHub
commit d95dda3a66
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 22 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
doc/interactive-commands.md
View File

@ -18,6 +18,8 @@ Both interfaces may serve at the same time. Both respond to simple text command,
- `status`: returns a detailed status summary of migration progress and configuration
- `sup`: returns a brief status summary of migration progress
- `coordinates`: returns recent (though not exactly up to date) binary log coordinates of the inspected server
- `applier`: returns the hostname of the applier
- `inspector`: returns the hostname of the inspector
- `chunk-size=<newsize>`: modify the `chunk-size`; applies on next running copy-iteration
- `dml-batch-size=<newsize>`: modify the `dml-batch-size`; applies on next applying of binary log events
- `max-lag-millis=<max-lag>`: modify the maximum replication lag threshold (milliseconds, minimum value is `100`, i.e. `0.1` second)

22
go/logic/server.go
View File

@ -1,5 +1,5 @@
/*
Copyright 2016 GitHub Inc.
Copyright 2021 GitHub Inc.
See https://github.com/github/gh-ost/blob/master/LICENSE
*/
@ -146,7 +146,9 @@ func (this *Server) applyServerCommand(command string, writer *bufio.Writer) (pr
fmt.Fprint(writer, `available commands:
status # Print a detailed status message
sup # Print a short status message
coordinates # Print the currently inspected coordinates
coordinates # Print the currently inspected coordinates
applier # Print the hostname of the applier
inspector # Print the hostname of the inspector
chunk-size=<newsize> # Set a new chunk-size
dml-batch-size=<newsize> # Set a new dml-batch-size
nice-ratio=<ratio> # Set a new nice-ratio, immediate sleep after each row-copy operation, float (examples: 0 is aggressive, 0.7 adds 70% runtime, 1.0 doubles runtime, 2.0 triples runtime, ...)
@ -177,6 +179,22 @@ help # This message
}
return NoPrintStatusRule, fmt.Errorf("coordinates are read-only")
}
case "applier":
if this.migrationContext.ApplierConnectionConfig != nil && this.migrationContext.ApplierConnectionConfig.ImpliedKey != nil {
fmt.Fprintf(writer, "Host: %s, Version: %s\n",
this.migrationContext.ApplierConnectionConfig.ImpliedKey.String(),
this.migrationContext.ApplierMySQLVersion,
)
}
return NoPrintStatusRule, nil
case "inspector":
if this.migrationContext.InspectorConnectionConfig != nil && this.migrationContext.InspectorConnectionConfig.ImpliedKey != nil {
fmt.Fprintf(writer, "Host: %s, Version: %s\n",
this.migrationContext.InspectorConnectionConfig.ImpliedKey.String(),
this.migrationContext.InspectorMySQLVersion,
)
}
return NoPrintStatusRule, nil
case "chunk-size":
{
if argIsQuestion {