Chris Lu
8 years ago
committed by
GitHub
GitHub
12 changed files with 437 additions and 11 deletions
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5weed/command/filer.go
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2weed/command/server.go
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2weed/filer/cassandra_store/cassandra_store.go
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4weed/filer/embedded_filer/files_in_leveldb.go
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6weed/filer/filer.go
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67weed/filer/mysql_store/README.md
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270weed/filer/mysql_store/mysql_store.go
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30weed/filer/mysql_store/mysql_store_test.go
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4weed/filer/redis_store/redis_store.go
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43weed/server/filer_server.go
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3weed/server/filer_server_handlers_read.go
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12weed/server/filer_server_handlers_write.go
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#MySQL filer mapping store |
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## Schema format |
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Basically, uriPath and fid are the key elements stored in MySQL. In view of the optimization and user's usage, |
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adding primary key with integer type and involving createTime, updateTime, status fields should be somewhat meaningful. |
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Of course, you could customize the schema per your concretely circumstance freely. |
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<pre><code> |
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CREATE TABLE IF NOT EXISTS `filer_mapping` ( |
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`id` bigint(20) NOT NULL AUTO_INCREMENT, |
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`uriPath` char(256) NOT NULL DEFAULT "" COMMENT 'http uriPath', |
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`fid` char(36) NOT NULL DEFAULT "" COMMENT 'seaweedfs fid', |
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`createTime` int(10) NOT NULL DEFAULT 0 COMMENT 'createdTime in unix timestamp', |
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`updateTime` int(10) NOT NULL DEFAULT 0 COMMENT 'updatedTime in unix timestamp', |
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`remark` varchar(20) NOT NULL DEFAULT "" COMMENT 'reserverd field', |
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`status` tinyint(2) DEFAULT '1' COMMENT 'resource status', |
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PRIMARY KEY (`id`), |
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UNIQUE KEY `index_uriPath` (`uriPath`) |
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) DEFAULT CHARSET=utf8; |
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</code></pre> |
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|
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The MySQL 's config params is not added into the weed command option as other stores(redis,cassandra). Instead, |
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We created a config file(json format) for them. TOML,YAML or XML also should be OK. But TOML and YAML need import thirdparty package |
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while XML is a little bit complex. |
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The sample config file's content is below: |
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<pre><code> |
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{ |
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"mysql": [ |
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{ |
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"User": "root", |
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"Password": "root", |
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"HostName": "127.0.0.1", |
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"Port": 3306, |
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"DataBase": "seaweedfs" |
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}, |
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{ |
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"User": "root", |
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"Password": "root", |
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"HostName": "127.0.0.2", |
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"Port": 3306, |
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"DataBase": "seaweedfs" |
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} |
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], |
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"IsSharding":true, |
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"ShardCount":1024 |
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} |
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</code></pre> |
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The "mysql" field in above conf file is an array which include all mysql instances you prepared to store sharding data. |
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1. If one mysql instance is enough, just keep one instance in "mysql" field. |
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2. If table sharding at a specific mysql instance is needed , mark "IsSharding" field with true and specify total table sharding numbers using "ShardCount" field. |
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3. If the mysql service could be auto scaled transparently in your environment, just config one mysql instance(usually it's a frondend proxy or VIP),and mark "IsSharding" with false value |
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4. If you prepare more than one mysql instance and have no plan to use table sharding for any instance(mark isSharding with false), instance sharding will still be done implicitly |
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@ -0,0 +1,270 @@ |
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package mysql_store |
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import ( |
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"database/sql" |
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"fmt" |
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"hash/crc32" |
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"sync" |
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"time" |
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"github.com/chrislusf/seaweedfs/weed/filer" |
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_ "github.com/go-sql-driver/mysql" |
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) |
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const ( |
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sqlUrl = "%s:%s@tcp(%s:%d)/%s?charset=utf8" |
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default_maxIdleConnections = 100 |
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default_maxOpenConnections = 50 |
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default_maxTableNums = 1024 |
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tableName = "filer_mapping" |
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) |
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var ( |
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_init_db sync.Once |
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_db_connections []*sql.DB |
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) |
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type MySqlConf struct { |
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User string |
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Password string |
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HostName string |
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Port int |
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DataBase string |
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MaxIdleConnections int |
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MaxOpenConnections int |
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} |
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type ShardingConf struct { |
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IsSharding bool `json:"isSharding"` |
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ShardCount int `json:"shardCount"` |
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} |
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type MySqlStore struct { |
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dbs []*sql.DB |
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isSharding bool |
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shardCount int |
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} |
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func getDbConnection(confs []MySqlConf) []*sql.DB { |
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_init_db.Do(func() { |
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for _, conf := range confs { |
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sqlUrl := fmt.Sprintf(sqlUrl, conf.User, conf.Password, conf.HostName, conf.Port, conf.DataBase) |
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var dbErr error |
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_db_connection, dbErr := sql.Open("mysql", sqlUrl) |
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if dbErr != nil { |
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_db_connection.Close() |
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_db_connection = nil |
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panic(dbErr) |
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} |
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var maxIdleConnections, maxOpenConnections int |
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if conf.MaxIdleConnections != 0 { |
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maxIdleConnections = conf.MaxIdleConnections |
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} else { |
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maxIdleConnections = default_maxIdleConnections |
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} |
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if conf.MaxOpenConnections != 0 { |
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maxOpenConnections = conf.MaxOpenConnections |
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} else { |
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maxOpenConnections = default_maxOpenConnections |
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} |
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_db_connection.SetMaxIdleConns(maxIdleConnections) |
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_db_connection.SetMaxOpenConns(maxOpenConnections) |
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_db_connections = append(_db_connections, _db_connection) |
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} |
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}) |
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return _db_connections |
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} |
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func NewMysqlStore(confs []MySqlConf, isSharding bool, shardCount int) *MySqlStore { |
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ms := &MySqlStore{ |
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dbs: getDbConnection(confs), |
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isSharding: isSharding, |
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shardCount: shardCount, |
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} |
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for _, db := range ms.dbs { |
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if !isSharding { |
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ms.shardCount = 1 |
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} else { |
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if ms.shardCount == 0 { |
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ms.shardCount = default_maxTableNums |
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} |
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} |
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for i := 0; i < ms.shardCount; i++ { |
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if err := ms.createTables(db, tableName, i); err != nil { |
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fmt.Printf("create table failed %v", err) |
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} |
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} |
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} |
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return ms |
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} |
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func (s *MySqlStore) hash(fullFileName string) (instance_offset, table_postfix int) { |
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hash_value := crc32.ChecksumIEEE([]byte(fullFileName)) |
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instance_offset = int(hash_value) % len(s.dbs) |
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table_postfix = int(hash_value) % s.shardCount |
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return |
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} |
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func (s *MySqlStore) parseFilerMappingInfo(path string) (instanceId int, tableFullName string, err error) { |
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instance_offset, table_postfix := s.hash(path) |
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instanceId = instance_offset |
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if s.isSharding { |
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tableFullName = fmt.Sprintf("%s_%04d", tableName, table_postfix) |
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} else { |
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tableFullName = tableName |
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} |
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return |
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} |
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func (s *MySqlStore) Get(fullFilePath string) (fid string, err error) { |
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath) |
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if err != nil { |
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return "", fmt.Errorf("MySqlStore Get operation can not parse file path %s: err is %v", fullFilePath, err) |
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} |
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fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName) |
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if err == sql.ErrNoRows { |
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//Could not found
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err = filer.ErrNotFound |
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} |
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return fid, err |
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} |
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func (s *MySqlStore) Put(fullFilePath string, fid string) (err error) { |
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var tableFullName string |
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath) |
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if err != nil { |
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return fmt.Errorf("MySqlStore Put operation can not parse file path %s: err is %v", fullFilePath, err) |
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} |
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var old_fid string |
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if old_fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil && err != sql.ErrNoRows { |
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return fmt.Errorf("MySqlStore Put operation failed when querying path %s: err is %v", fullFilePath, err) |
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} else { |
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if len(old_fid) == 0 { |
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err = s.insert(fullFilePath, fid, s.dbs[instance_offset], tableFullName) |
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err = fmt.Errorf("MySqlStore Put operation failed when inserting path %s with fid %s : err is %v", fullFilePath, fid, err) |
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} else { |
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err = s.update(fullFilePath, fid, s.dbs[instance_offset], tableFullName) |
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err = fmt.Errorf("MySqlStore Put operation failed when updating path %s with fid %s : err is %v", fullFilePath, fid, err) |
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} |
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} |
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return |
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} |
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func (s *MySqlStore) Delete(fullFilePath string) (err error) { |
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var fid string |
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instance_offset, tableFullName, err := s.parseFilerMappingInfo(fullFilePath) |
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if err != nil { |
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return fmt.Errorf("MySqlStore Delete operation can not parse file path %s: err is %v", fullFilePath, err) |
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} |
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if fid, err = s.query(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil { |
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return fmt.Errorf("MySqlStore Delete operation failed when querying path %s: err is %v", fullFilePath, err) |
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} else if fid == "" { |
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return nil |
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} |
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if err = s.delete(fullFilePath, s.dbs[instance_offset], tableFullName); err != nil { |
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return fmt.Errorf("MySqlStore Delete operation failed when deleting path %s: err is %v", fullFilePath, err) |
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} else { |
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return nil |
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} |
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} |
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func (s *MySqlStore) Close() { |
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for _, db := range s.dbs { |
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db.Close() |
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} |
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} |
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var createTable = ` |
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CREATE TABLE IF NOT EXISTS %s ( |
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id bigint(20) NOT NULL AUTO_INCREMENT, |
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uriPath char(256) NOT NULL DEFAULT "" COMMENT 'http uriPath', |
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fid char(36) NOT NULL DEFAULT "" COMMENT 'seaweedfs fid', |
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createTime int(10) NOT NULL DEFAULT 0 COMMENT 'createdTime in unix timestamp', |
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updateTime int(10) NOT NULL DEFAULT 0 COMMENT 'updatedTime in unix timestamp', |
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remark varchar(20) NOT NULL DEFAULT "" COMMENT 'reserverd field', |
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status tinyint(2) DEFAULT '1' COMMENT 'resource status', |
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PRIMARY KEY (id), |
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UNIQUE KEY index_uriPath (uriPath) |
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) DEFAULT CHARSET=utf8; |
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` |
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func (s *MySqlStore) createTables(db *sql.DB, tableName string, postfix int) error { |
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var realTableName string |
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if s.isSharding { |
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realTableName = fmt.Sprintf("%s_%4d", tableName, postfix) |
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} else { |
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realTableName = tableName |
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} |
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stmt, err := db.Prepare(fmt.Sprintf(createTable, realTableName)) |
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if err != nil { |
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return err |
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} |
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defer stmt.Close() |
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_, err = stmt.Exec() |
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if err != nil { |
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return err |
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} |
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return nil |
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} |
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func (s *MySqlStore) query(uriPath string, db *sql.DB, tableName string) (string, error) { |
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sqlStatement := "SELECT fid FROM %s WHERE uriPath=?" |
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row := db.QueryRow(fmt.Sprintf(sqlStatement, tableName), uriPath) |
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var fid string |
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err := row.Scan(&fid) |
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if err != nil { |
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return "", err |
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} |
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return fid, nil |
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} |
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func (s *MySqlStore) update(uriPath string, fid string, db *sql.DB, tableName string) error { |
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sqlStatement := "UPDATE %s SET fid=?, updateTime=? WHERE uriPath=?" |
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res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), fid, time.Now().Unix(), uriPath) |
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if err != nil { |
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return err |
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} |
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_, err = res.RowsAffected() |
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if err != nil { |
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return err |
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} |
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return nil |
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} |
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func (s *MySqlStore) insert(uriPath string, fid string, db *sql.DB, tableName string) error { |
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sqlStatement := "INSERT INTO %s (uriPath,fid,createTime) VALUES(?,?,?)" |
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res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), uriPath, fid, time.Now().Unix()) |
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if err != nil { |
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return err |
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} |
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_, err = res.RowsAffected() |
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if err != nil { |
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return err |
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} |
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return nil |
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} |
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func (s *MySqlStore) delete(uriPath string, db *sql.DB, tableName string) error { |
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sqlStatement := "DELETE FROM %s WHERE uriPath=?" |
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res, err := db.Exec(fmt.Sprintf(sqlStatement, tableName), uriPath) |
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if err != nil { |
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return err |
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} |
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_, err = res.RowsAffected() |
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if err != nil { |
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return err |
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} |
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return nil |
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} |
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@ -0,0 +1,30 @@ |
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package mysql_store |
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import ( |
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"encoding/json" |
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"hash/crc32" |
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"testing" |
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) |
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|
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func TestGenerateMysqlConf(t *testing.T) { |
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var conf []MySqlConf |
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conf = append(conf, MySqlConf{ |
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User: "root", |
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Password: "root", |
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HostName: "localhost", |
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Port: 3306, |
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DataBase: "seaweedfs", |
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}) |
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body, err := json.Marshal(conf) |
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if err != nil { |
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t.Errorf("json encoding err %s", err.Error()) |
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} |
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t.Logf("json output is %s", string(body)) |
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} |
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|
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func TestCRC32FullPathName(t *testing.T) { |
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fullPathName := "/prod-bucket/law632191483895612493300-signed.pdf" |
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hash_value := crc32.ChecksumIEEE([]byte(fullPathName)) |
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table_postfix := int(hash_value) % 1024 |
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t.Logf("table postfix %d", table_postfix) |
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} |
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