README
¶
Vitess
Vitess is a database clustering system for horizontal scaling of MySQL through generalized sharding.
By encapsulating shard-routing logic, Vitess allows application code and database queries to remain agnostic to the distribution of data onto multiple shards. With Vitess, you can even split and merge shards as your needs grow, with an atomic cutover step that takes only a few seconds.
Vitess has been a core component of YouTube's database infrastructure since 2011, and has grown to encompass tens of thousands of MySQL nodes.
For more about Vitess, please visit vitess.io.
Vitess has a growing community. You can view the list of adopters here.
Contact
Ask questions in the vitess@googlegroups.com discussion forum.
For topics that are better discussed live, please join the Vitess Slack workspace.
Subscribe to vitess-announce@googlegroups.com or the Vitess Blog for low-frequency updates like new features and releases.
Security
Reporting Security Vulnerabilities
To report a security vulnerability, please email vitess-maintainers.
See Security for a full outline of the security process.
Security Audit
A third party security audit was performed by Cure53. You can see the full report here.
License
Unless otherwise noted, the Vitess source files are distributed under the Apache Version 2.0 license found in the LICENSE file.
Documentation
¶
Overview ¶
test.go is a "Go script" for running Vitess tests. It runs each test in its own Docker container for hermeticity and (potentially) parallelism. If a test fails, this script will save the output in _test/ and continue with other tests.
Before using it, you should have Docker 1.5+ installed, and have your user in the group that lets you run the docker command without sudo. The first time you run against a given flavor, it may take some time for the corresponding bootstrap image (vitess/bootstrap:<flavor>) to be downloaded.
It is meant to be run from the Vitess root, like so:
$ go run test.go [args]
For a list of options, run:
$ go run test.go --help
Source Files
Directories
¶
| Path | Synopsis |
|---|---|
|
examples
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|
compose
client.go is a sample for using the Vitess Go SQL driver.
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client.go is a sample for using the Vitess Go SQL driver. |
|
go
|
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acl
Package acl contains functions to enforce access control lists.
|
Package acl contains functions to enforce access control lists. |
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cache
Package cache implements a LRU cache.
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Package cache implements a LRU cache. |
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cmd/mysqlctl
mysqlctl initializes and controls mysqld with Vitess-specific configuration.
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mysqlctl initializes and controls mysqld with Vitess-specific configuration. |
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cmd/mysqlctld
mysqlctld is a daemon that starts or initializes mysqld and provides an RPC interface for vttablet to stop and start mysqld from a different container without having to restart the container running mysqlctld.
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mysqlctld is a daemon that starts or initializes mysqld and provides an RPC interface for vttablet to stop and start mysqld from a different container without having to restart the container running mysqlctld. |
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cmd/vtcombo
vtcombo: a single binary that contains: - a ZK topology server based on an in-memory map.
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vtcombo: a single binary that contains: - a ZK topology server based on an in-memory map. |
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cmd/vtgateclienttest
Package main is the implementation of vtgateclienttest.
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Package main is the implementation of vtgateclienttest. |
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cmd/vtgateclienttest/services
Package services exposes all the services for the vtgateclienttest binary.
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Package services exposes all the services for the vtgateclienttest binary. |
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cmd/vttestserver
vttestserver is a native Go implementation of `run_local_server.py`.
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vttestserver is a native Go implementation of `run_local_server.py`. |
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cmd/vtworker
vtworker is the main program to run a worker job.
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vtworker is the main program to run a worker job. |
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cmd/zkctl
zkctl initializes and controls ZooKeeper with Vitess-specific configuration.
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zkctl initializes and controls ZooKeeper with Vitess-specific configuration. |
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cmd/zkctld
zkctld is a daemon that starts or initializes ZooKeeper with Vitess-specific configuration.
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zkctld is a daemon that starts or initializes ZooKeeper with Vitess-specific configuration. |
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event
Package event provides a reflect-based framework for low-frequency global dispatching of events, which are values of any arbitrary type, to a set of listener functions, which are usually registered by plugin packages during init().
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Package event provides a reflect-based framework for low-frequency global dispatching of events, which are values of any arbitrary type, to a set of listener functions, which are usually registered by plugin packages during init(). |
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event/syslogger
Package syslogger uses the event package to listen for any event that implements the Syslogger interface.
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Package syslogger uses the event package to listen for any event that implements the Syslogger interface. |
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exit
Package exit provides an alternative to os.Exit(int).
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Package exit provides an alternative to os.Exit(int). |
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fileutil
Package fileutil contains utility functions related to files and paths.
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Package fileutil contains utility functions related to files and paths. |
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flagutil
Package flagutil contains flags that parse string lists and string maps.
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Package flagutil contains flags that parse string lists and string maps. |
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hack
Package hack gives you some efficient functionality at the cost of breaking some Go rules.
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Package hack gives you some efficient functionality at the cost of breaking some Go rules. |
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history
Package history implements a circular buffer with adjacent-item deduplication.
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Package history implements a circular buffer with adjacent-item deduplication. |
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ioutil2
Package ioutil2 provides extra functionality along similar lines to io/ioutil.
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Package ioutil2 provides extra functionality along similar lines to io/ioutil. |
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json2
Package json2 provides some improvements over the original json.
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Package json2 provides some improvements over the original json. |
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jsonutil
Package jsonutil contains json-related utility functions
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Package jsonutil contains json-related utility functions |
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memcache
Package memcache is a client for memcached.
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Package memcache is a client for memcached. |
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mysql
Package mysql is a library to support MySQL binary protocol, both client and server sides.
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Package mysql is a library to support MySQL binary protocol, both client and server sides. |
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mysql/endtoend
Package endtoend is a test-only package.
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Package endtoend is a test-only package. |
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mysql/fakesqldb
Package fakesqldb provides a MySQL server for tests.
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Package fakesqldb provides a MySQL server for tests. |
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netutil
Package netutil contains network-related utility functions.
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Package netutil contains network-related utility functions. |
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pools
Package pools provides functionality to manage and reuse resources like connections.
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Package pools provides functionality to manage and reuse resources like connections. |
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proc
Package proc allows you to configure servers to be restarted with negligible downtime.
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Package proc allows you to configure servers to be restarted with negligible downtime. |
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ratelimiter
Package ratelimiter implements rate limiting functionality.
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Package ratelimiter implements rate limiting functionality. |
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sqltypes
Package sqltypes implements interfaces and types that represent SQL values.
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Package sqltypes implements interfaces and types that represent SQL values. |
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stats
Package stats is a wrapper for expvar.
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Package stats is a wrapper for expvar. |
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stats/opentsdb
Package opentsdb adds support for pushing stats to opentsdb.
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Package opentsdb adds support for pushing stats to opentsdb. |
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streamlog
Package streamlog provides a non-blocking message broadcaster.
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Package streamlog provides a non-blocking message broadcaster. |
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sync2
Package sync2 provides extra functionality along the same lines as sync.
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Package sync2 provides extra functionality along the same lines as sync. |
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tb
Package tb exposes some handy traceback functionality buried in the runtime.
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Package tb exposes some handy traceback functionality buried in the runtime. |
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timer
Package timer provides various enhanced timer functions.
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Package timer provides various enhanced timer functions. |
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vt/automation
Package automation contains code to execute high-level cluster operations (e.g.
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Package automation contains code to execute high-level cluster operations (e.g. |
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vt/binlog/binlogplayer
Package binlogplayer contains the code that plays a vreplication stream on a client database.
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Package binlogplayer contains the code that plays a vreplication stream on a client database. |
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vt/binlog/eventtoken
Package eventtoken includes utility methods for event token handling.
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Package eventtoken includes utility methods for event token handling. |
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vt/binlog/grpcbinlogstreamer
Package grpcbinlogstreamer contains the gRPC implementation of the binlog streamer server component.
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Package grpcbinlogstreamer contains the gRPC implementation of the binlog streamer server component. |
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vt/callerid
Package callerid stores/retrieves CallerIDs (immediate CallerID and effective CallerID) to/from the Context
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Package callerid stores/retrieves CallerIDs (immediate CallerID and effective CallerID) to/from the Context |
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vt/callinfo
Package callinfo stores custom values into the Context (related to the RPC source)
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Package callinfo stores custom values into the Context (related to the RPC source) |
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vt/dbconfigs
Package dbconfigs provides the registration for command line options to collect db connection parameters.
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Package dbconfigs provides the registration for command line options to collect db connection parameters. |
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vt/dbconnpool
Package dbconnpool exposes a single DBConnection object with wrapped access to a single DB connection, and a ConnectionPool object to pool these DBConnections.
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Package dbconnpool exposes a single DBConnection object with wrapped access to a single DB connection, and a ConnectionPool object to pool these DBConnections. |
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vt/discovery
Package discovery provides a way to discover all tablets e.g.
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Package discovery provides a way to discover all tablets e.g. |
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vt/dtids
Package dtids contains dtid convenience functions.
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Package dtids contains dtid convenience functions. |
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vt/events
Package events defines common structures used for events dispatched from various other package.
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Package events defines common structures used for events dispatched from various other package. |
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vt/grpcclient
Package grpcclient contains utility methods for gRPC client implementations to use.
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Package grpcclient contains utility methods for gRPC client implementations to use. |
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vt/logz
Package logz provides an infrastructure to expose a list of entries as a sortable table on a webpage.
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Package logz provides an infrastructure to expose a list of entries as a sortable table on a webpage. |
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vt/mysqlctl/azblobbackupstorage
Package azblobbackupstorage implements the BackupStorage interface for Azure Blob Storage
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Package azblobbackupstorage implements the BackupStorage interface for Azure Blob Storage |
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vt/mysqlctl/backupstorage
Package backupstorage contains the interface and file system implementation of the backup system.
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Package backupstorage contains the interface and file system implementation of the backup system. |
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vt/mysqlctl/cephbackupstorage
Package cephbackupstorage implements the BackupStorage interface for Ceph Cloud Storage.
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Package cephbackupstorage implements the BackupStorage interface for Ceph Cloud Storage. |
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vt/mysqlctl/filebackupstorage
Package filebackupstorage implements the BackupStorage interface for a local filesystem (which can be an NFS mount).
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Package filebackupstorage implements the BackupStorage interface for a local filesystem (which can be an NFS mount). |
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vt/mysqlctl/gcsbackupstorage
Package gcsbackupstorage implements the BackupStorage interface for Google Cloud Storage.
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Package gcsbackupstorage implements the BackupStorage interface for Google Cloud Storage. |
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vt/mysqlctl/grpcmysqlctlclient
Package grpcmysqlctlclient contains the gRPC1 version of the mysqlctl client protocol.
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Package grpcmysqlctlclient contains the gRPC1 version of the mysqlctl client protocol. |
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vt/mysqlctl/grpcmysqlctlserver
Package grpcmysqlctlserver contains the gRPC implementation of the server side of the remote execution of mysqlctl commands.
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Package grpcmysqlctlserver contains the gRPC implementation of the server side of the remote execution of mysqlctl commands. |
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vt/mysqlctl/mysqlctlclient
Package mysqlctlclient contains the generic client side of the remote mysqlctl protocol.
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Package mysqlctlclient contains the generic client side of the remote mysqlctl protocol. |
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vt/mysqlctl/s3backupstorage
Package s3backupstorage implements the BackupStorage interface for AWS S3.
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Package s3backupstorage implements the BackupStorage interface for AWS S3. |
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vt/mysqlctl/tmutils
Package tmutils contains helper methods to deal with the tabletmanagerdata proto3 structures.
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Package tmutils contains helper methods to deal with the tabletmanagerdata proto3 structures. |
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vt/mysqlproxy
Package mysqlproxy is a basic module that proxies a mysql server session to appropriate calls in a queryservice back end, with optional query normalization.
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Package mysqlproxy is a basic module that proxies a mysql server session to appropriate calls in a queryservice back end, with optional query normalization. |
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vt/servenv
Package servenv contains functionality that is common for all Vitess server programs.
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Package servenv contains functionality that is common for all Vitess server programs. |
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vt/sqlannotation
Package sqlannotation provides functions for annotating DML statements with keyspace-id comments and parsing them.
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Package sqlannotation provides functions for annotating DML statements with keyspace-id comments and parsing them. |
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vt/sqlparser/visitorgen
Package visitorgen is responsible for taking the ast.go of Vitess and and producing visitor infrastructure for it.
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Package visitorgen is responsible for taking the ast.go of Vitess and and producing visitor infrastructure for it. |
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vt/srvtopo
Package srvtopo contains a set of helper methods and classes to use the topology service in a serving environment.
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Package srvtopo contains a set of helper methods and classes to use the topology service in a serving environment. |
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vt/status
Package status defines a few useful functions for our binaries, mainly to link the status page with a vtctld instance.
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Package status defines a few useful functions for our binaries, mainly to link the status page with a vtctld instance. |
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vt/throttler
Package throttler provides a client-side, local throttler which is used to throttle (and actively pace) writes during the resharding process.
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Package throttler provides a client-side, local throttler which is used to throttle (and actively pace) writes during the resharding process. |
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vt/throttler/grpcthrottlerclient
Package grpcthrottlerclient contains the gRPC version of the throttler client protocol.
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Package grpcthrottlerclient contains the gRPC version of the throttler client protocol. |
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vt/throttler/grpcthrottlerserver
Package grpcthrottlerserver contains the gRPC implementation of the server side of the throttler service.
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Package grpcthrottlerserver contains the gRPC implementation of the server side of the throttler service. |
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vt/throttler/throttlerclient
Package throttlerclient defines the generic RPC client interface for the throttler service.
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Package throttlerclient defines the generic RPC client interface for the throttler service. |
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vt/throttler/throttlerclienttest
Package throttlerclienttest contains the testsuite against which each RPC implementation of the throttlerclient interface must be tested.
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Package throttlerclienttest contains the testsuite against which each RPC implementation of the throttlerclient interface must be tested. |
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vt/tlstest
Package tlstest contains utility methods to create test certificates.
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Package tlstest contains utility methods to create test certificates. |
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vt/topo
Package topo is the module responsible for interacting with the topology service.
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Package topo is the module responsible for interacting with the topology service. |
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vt/topo/consultopo
Package consultopo implements topo.Server with consul as the backend.
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Package consultopo implements topo.Server with consul as the backend. |
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vt/topo/etcd2topo
Package etcd2topo implements topo.Server with etcd as the backend.
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Package etcd2topo implements topo.Server with etcd as the backend. |
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vt/topo/events
Package events defines the structures used for events relating directly to individual topology elements, like keyspaces, shards, and tablets.
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Package events defines the structures used for events relating directly to individual topology elements, like keyspaces, shards, and tablets. |
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vt/topo/helpers
Package helpers contains a few utility classes to handle topo.Server objects, and transitions from one topo implementation to another.
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Package helpers contains a few utility classes to handle topo.Server objects, and transitions from one topo implementation to another. |
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vt/topo/k8stopo
Package k8stopo implements topo.Server with the Kubernetes API as the backend.
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Package k8stopo implements topo.Server with the Kubernetes API as the backend. |
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vt/topo/k8stopo/client/clientset/versioned
This package has the automatically generated clientset.
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This package has the automatically generated clientset. |
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vt/topo/k8stopo/client/clientset/versioned/fake
This package has the automatically generated fake clientset.
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This package has the automatically generated fake clientset. |
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vt/topo/k8stopo/client/clientset/versioned/scheme
This package contains the scheme of the automatically generated clientset.
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This package contains the scheme of the automatically generated clientset. |
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vt/topo/k8stopo/client/clientset/versioned/typed/topo/v1beta1
This package has the automatically generated typed clients.
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This package has the automatically generated typed clients. |
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vt/topo/k8stopo/client/clientset/versioned/typed/topo/v1beta1/fake
Package fake has the automatically generated clients.
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Package fake has the automatically generated clients. |
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vt/topo/memorytopo
Package memorytopo contains an implementation of the topo.Factory / topo.Conn interfaces based on an in-memory tree of data.
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Package memorytopo contains an implementation of the topo.Factory / topo.Conn interfaces based on an in-memory tree of data. |
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vt/topo/test
Package test contains utilities to test topo.Conn implementations.
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Package test contains utilities to test topo.Conn implementations. |
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vt/topo/topoproto
Package topoproto contains utility functions to deal with the proto3 structures defined in proto/topodata.
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Package topoproto contains utility functions to deal with the proto3 structures defined in proto/topodata. |
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vt/topo/topotests
Package topotests contains all the unit tests for the topo.Server code that is based on topo.Conn.
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Package topotests contains all the unit tests for the topo.Server code that is based on topo.Conn. |
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vt/topotools
Package topotools contains high level functions based on vt/topo and vt/actionnode.
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Package topotools contains high level functions based on vt/topo and vt/actionnode. |
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vt/topotools/events
Package events defines the structures used for events dispatched from the wrangler package.
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Package events defines the structures used for events dispatched from the wrangler package. |
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vt/vitessdriver
Package vitessdriver contains the Vitess Go SQL driver.
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Package vitessdriver contains the Vitess Go SQL driver. |
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vt/vtaclcheck
Package vtaclcheck analyzes a set of sql statements and returns the corresponding vtgate and vttablet query plans that will be executed on the given statements
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Package vtaclcheck analyzes a set of sql statements and returns the corresponding vtgate and vttablet query plans that will be executed on the given statements |
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vt/vtctl
Package vtctl contains the implementation of all the Vitess management commands.
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Package vtctl contains the implementation of all the Vitess management commands. |
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vt/vtctl/fakevtctlclient
Package fakevtctlclient contains a fake for the vtctlclient interface.
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Package fakevtctlclient contains a fake for the vtctlclient interface. |
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vt/vtctl/grpcvtctlclient
Package grpcvtctlclient contains the gRPC version of the vtctl client protocol
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Package grpcvtctlclient contains the gRPC version of the vtctl client protocol |
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vt/vtctl/grpcvtctlserver
Package grpcvtctlserver contains the gRPC implementation of the server side of the remote execution of vtctl commands.
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Package grpcvtctlserver contains the gRPC implementation of the server side of the remote execution of vtctl commands. |
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vt/vtctl/vtctlclient
Package vtctlclient contains the generic client side of the remote vtctl protocol.
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Package vtctlclient contains the generic client side of the remote vtctl protocol. |
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vt/vtctl/vtctlclienttest
Package vtctlclienttest contains the testsuite against which each RPC implementation of the vtctlclient interface must be tested.
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Package vtctlclienttest contains the testsuite against which each RPC implementation of the vtctlclient interface must be tested. |
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vt/vtctld
Package vtctld contains all the code to expose a vtctld server based on the provided topo.Server.
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Package vtctld contains all the code to expose a vtctld server based on the provided topo.Server. |
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vt/vterrors
Package vterrors provides simple error handling primitives for Vitess
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Package vterrors provides simple error handling primitives for Vitess |
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vt/vtexplain
Package vtexplain analyzes a set of sql statements and returns the corresponding vtgate and vttablet query plans that will be executed on the given statements
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Package vtexplain analyzes a set of sql statements and returns the corresponding vtgate and vttablet query plans that will be executed on the given statements |
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vt/vtgate
Package vtgate provides query routing rpc services for vttablets.
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Package vtgate provides query routing rpc services for vttablets. |
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vt/vtgate/buffer
Package buffer provides a buffer for MASTER traffic during failovers.
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Package buffer provides a buffer for MASTER traffic during failovers. |
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vt/vtgate/fakerpcvtgateconn
Package fakerpcvtgateconn provides a fake implementation of vtgateconn.Impl that doesn't do any RPC, but uses a local map to return results.
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Package fakerpcvtgateconn provides a fake implementation of vtgateconn.Impl that doesn't do any RPC, but uses a local map to return results. |
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vt/vtgate/gateway
Package gateway contains the routing layer of vtgate.
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Package gateway contains the routing layer of vtgate. |
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vt/vtgate/gatewaytest
Package gatewaytest contains a test suite to run against a Gateway object.
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Package gatewaytest contains a test suite to run against a Gateway object. |
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vt/vtgate/grpcvtgateconn
Package grpcvtgateconn provides gRPC connectivity for VTGate.
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Package grpcvtgateconn provides gRPC connectivity for VTGate. |
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vt/vtgate/grpcvtgateservice
Package grpcvtgateservice provides the gRPC glue for vtgate
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Package grpcvtgateservice provides the gRPC glue for vtgate |
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vt/vtgate/planbuilder
Package planbuilder allows you to build execution plans that describe how to fulfill a query that may span multiple keyspaces or shards.
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Package planbuilder allows you to build execution plans that describe how to fulfill a query that may span multiple keyspaces or shards. |
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vt/vtgate/vtgateservice
Package vtgateservice provides to interface definition for the vtgate service
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Package vtgateservice provides to interface definition for the vtgate service |
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vt/vttablet/customrule/filecustomrule
Package filecustomrule implements static custom rule from a config file
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Package filecustomrule implements static custom rule from a config file |
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vt/vttablet/customrule/topocustomrule
Package topocustomrule implements a topo service backed listener for query rules.
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Package topocustomrule implements a topo service backed listener for query rules. |
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vt/vttablet/endtoend
Package endtoend is a test-only package.
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Package endtoend is a test-only package. |
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vt/vttablet/filelogger
Package filelogger implements an optional plugin that logs all queries to syslog.
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Package filelogger implements an optional plugin that logs all queries to syslog. |
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vt/vttablet/heartbeat
Package heartbeat contains a writer and reader of heartbeats for a master-slave cluster.
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Package heartbeat contains a writer and reader of heartbeats for a master-slave cluster. |
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vt/vttablet/queryservice
Package queryservice contains the interface for the service definition of the Query Service.
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Package queryservice contains the interface for the service definition of the Query Service. |
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vt/vttablet/sandboxconn
Package sandboxconn provides a fake QueryService implementation for tests.
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Package sandboxconn provides a fake QueryService implementation for tests. |
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vt/vttablet/sysloglogger
Package sysloglogger implements an optional plugin that logs all queries to syslog.
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Package sysloglogger implements an optional plugin that logs all queries to syslog. |
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vt/vttablet/tabletconntest
Package tabletconntest provides the test methods to make sure a tabletconn/queryservice pair over RPC works correctly.
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Package tabletconntest provides the test methods to make sure a tabletconn/queryservice pair over RPC works correctly. |
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vt/vttablet/tabletmanager
Package tabletmanager exports the ActionAgent object.
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Package tabletmanager exports the ActionAgent object. |
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vt/vttablet/tabletmanager/events
Package events contains event structs used by the tabletmanager package.
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Package events contains event structs used by the tabletmanager package. |
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vt/vttablet/tabletserver/schema/schematest
Package schematest provides support for testing packages that depend on schema
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Package schematest provides support for testing packages that depend on schema |
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vt/vttablet/tabletserver/tabletenv
Package tabletenv maintains environment variables and types that are common for all packages of tabletserver.
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Package tabletenv maintains environment variables and types that are common for all packages of tabletserver. |
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vt/vttablet/tabletserver/txserializer
Package txserializer provides the vttablet hot row protection.
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Package txserializer provides the vttablet hot row protection. |
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vt/vttablet/tabletserver/vstreamer/testenv
Package testenv supplies test functions for testing vstreamer.
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Package testenv supplies test functions for testing vstreamer. |
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vt/vttablet/tabletservermock
Package tabletservermock provides mock interfaces for tabletserver.
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Package tabletservermock provides mock interfaces for tabletserver. |
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vt/vttest
Package vttest contains helpers to set up Vitess for testing.
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Package vttest contains helpers to set up Vitess for testing. |
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vt/vttime
Package vttime contains the definitions and implementations for the Vitess time library.
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Package vttime contains the definitions and implementations for the Vitess time library. |
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vt/worker
Package worker contains the framework, utility methods and core functions for long running actions.
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Package worker contains the framework, utility methods and core functions for long running actions. |
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vt/worker/fakevtworkerclient
Package fakevtworkerclient contains a fake for the vtworkerclient interface.
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Package fakevtworkerclient contains a fake for the vtworkerclient interface. |
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vt/worker/grpcvtworkerclient
Package grpcvtworkerclient contains the gRPC version of the vtworker client protocol.
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Package grpcvtworkerclient contains the gRPC version of the vtworker client protocol. |
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vt/worker/grpcvtworkerserver
Package grpcvtworkerserver contains the gRPC implementation of the server side of the remote execution of vtworker commands.
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Package grpcvtworkerserver contains the gRPC implementation of the server side of the remote execution of vtworker commands. |
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vt/worker/vtworkerclient
Package vtworkerclient contains the generic client side of the remote vtworker protocol.
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Package vtworkerclient contains the generic client side of the remote vtworker protocol. |
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vt/worker/vtworkerclienttest
Package vtworkerclienttest contains the testsuite against which each RPC implementation of the vtworkerclient interface must be tested.
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Package vtworkerclienttest contains the testsuite against which each RPC implementation of the vtworkerclient interface must be tested. |
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vt/workflow/topovalidator
Package topovalidator contains a workflow that validates the topology data.
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Package topovalidator contains a workflow that validates the topology data. |
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vt/wrangler
Package wrangler contains the Wrangler object to manage complex topology actions.
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Package wrangler contains the Wrangler object to manage complex topology actions. |
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vt/wrangler/testlib
Package testlib contains utility methods to include in unit tests to deal with topology common tasks, like fake tablets and action loops.
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Package testlib contains utility methods to include in unit tests to deal with topology common tasks, like fake tablets and action loops. |
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client.go is a sample for using the Vitess Go SQL driver.
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client.go is a sample for using the Vitess Go SQL driver. |
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statsd is a simple server for hosting test.go remote stats.
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statsd is a simple server for hosting test.go remote stats. |
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