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使用须知
- 数据放在 hdfs 时，需要将 core-site.xml，hdfs-site.xml 和 hive-site.xml 放到 FE 和 BE 的 conf 目录下。优先读取 conf 目录下的 hadoop 配置文件，再读取环境变量
HADOOP_CONF_DIR的相关配置文件。 - 当前适配的 Paimon 版本为 0.8。
创建 Catalog
Paimon Catalog 当前支持两种类型的 Metastore 创建 Catalog:
- filesystem（默认），同时存储元数据和数据在 filesystem。
- hive metastore，它还将元数据存储在 Hive metastore 中。用户可以直接从 Hive 访问这些表。
基于 FileSystem 创建 Catalog
HDFS
CREATE CATALOG `paimon_hdfs` PROPERTIES ("type" = "paimon","warehouse" = "hdfs://HDFS8000871/user/paimon","dfs.nameservices" = "HDFS8000871","dfs.ha.namenodes.HDFS8000871" = "nn1,nn2","dfs.namenode.rpc-address.HDFS8000871.nn1" = "172.21.0.1:4007","dfs.namenode.rpc-address.HDFS8000871.nn2" = "172.21.0.2:4007","dfs.client.failover.proxy.provider.HDFS8000871" = "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider","hadoop.username" = "hadoop"
);CREATE CATALOG `paimon_kerberos` PROPERTIES ('type'='paimon',"warehouse" = "hdfs://HDFS8000871/user/paimon","dfs.nameservices" = "HDFS8000871","dfs.ha.namenodes.HDFS8000871" = "nn1,nn2","dfs.namenode.rpc-address.HDFS8000871.nn1" = "172.21.0.1:4007","dfs.namenode.rpc-address.HDFS8000871.nn2" = "172.21.0.2:4007","dfs.client.failover.proxy.provider.HDFS8000871" = "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider",'hadoop.security.authentication' = 'kerberos','hadoop.kerberos.keytab' = '/doris/hdfs.keytab', 'hadoop.kerberos.principal' = 'hdfs@HADOOP.COM'
);
MINIO
CREATE CATALOG `paimon_s3` PROPERTIES ("type" = "paimon","warehouse" = "s3://bucket_name/paimons3","s3.endpoint" = "http://<ip>:<port>","s3.access_key" = "ak","s3.secret_key" = "sk"
);
OBS
CREATE CATALOG `paimon_obs` PROPERTIES ("type" = "paimon","warehouse" = "obs://bucket_name/paimon","obs.endpoint"="obs.cn-north-4.myhuaweicloud.com","obs.access_key"="ak","obs.secret_key"="sk"
);
COS
CREATE CATALOG `paimon_s3` PROPERTIES ("type" = "paimon","warehouse" = "cosn://paimon-1308700295/paimoncos","cos.endpoint" = "cos.ap-beijing.myqcloud.com","cos.access_key" = "ak","cos.secret_key" = "sk"
);
OSS
CREATE CATALOG `paimon_oss` PROPERTIES ("type" = "paimon","warehouse" = "oss://paimon-zd/paimonoss","oss.endpoint" = "oss-cn-beijing.aliyuncs.com","oss.access_key" = "ak","oss.secret_key" = "sk"
);基于 Hive Metastore 创建 Catalog
CREATE CATALOG `paimon_hms` PROPERTIES ("type" = "paimon","paimon.catalog.type" = "hms","warehouse" = "hdfs://HDFS8000871/user/zhangdong/paimon2","hive.metastore.uris" = "thrift://172.21.0.44:7004","dfs.nameservices" = "HDFS8000871","dfs.ha.namenodes.HDFS8000871" = "nn1,nn2","dfs.namenode.rpc-address.HDFS8000871.nn1" = "172.21.0.1:4007","dfs.namenode.rpc-address.HDFS8000871.nn2" = "172.21.0.2:4007","dfs.client.failover.proxy.provider.HDFS8000871" = "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider","hadoop.username" = "hadoop"
);CREATE CATALOG `paimon_kerberos` PROPERTIES ("type" = "paimon","paimon.catalog.type" = "hms","warehouse" = "hdfs://HDFS8000871/user/zhangdong/paimon2","hive.metastore.uris" = "thrift://172.21.0.44:7004","hive.metastore.sasl.enabled" = "true","hive.metastore.kerberos.principal" = "hive/xxx@HADOOP.COM","dfs.nameservices" = "HDFS8000871","dfs.ha.namenodes.HDFS8000871" = "nn1,nn2","dfs.namenode.rpc-address.HDFS8000871.nn1" = "172.21.0.1:4007","dfs.namenode.rpc-address.HDFS8000871.nn2" = "172.21.0.2:4007","dfs.client.failover.proxy.provider.HDFS8000871" = "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider","hadoop.security.authentication" = "kerberos","hadoop.kerberos.principal" = "hdfs@HADOOP.COM","hadoop.kerberos.keytab" = "/doris/hdfs.keytab"
);
基于 Aliyun DLF 创建 Catalog
该功能自 2.1.7 和 3.0.3 版本支持。
CREATE CATALOG `paimon_dlf` PROPERTIES ("type" = "paimon","paimon.catalog.type" = "dlf","warehouse" = "oss://xx/yy/","dlf.proxy.mode" = "DLF_ONLY","dlf.uid" = "xxxxx","dlf.region" = "cn-beijing","dlf.access_key" = "ak","dlf.secret_key" = "sk"-- "dlf.endpoint" = "dlf.cn-beijing.aliyuncs.com", -- optional-- "dlf.catalog.id" = "xxxx", -- optional
);
列类型映射
| Paimon Data Type | Doris Data Type | Comment |
|---|---|---|
| BooleanType | Boolean | |
| TinyIntType | TinyInt | |
| SmallIntType | SmallInt | |
| IntType | Int | |
| FloatType | Float | |
| BigIntType | BigInt | |
| DoubleType | Double | |
| VarCharType | VarChar | |
| CharType | Char | |
| VarBinaryType, BinaryType | String | |
| DecimalType(precision, scale) | Decimal(precision, scale) | |
| TimestampType,LocalZonedTimestampType | DateTime | |
| DateType | Date | |
| ArrayType | Array | 支持 Array 嵌套 |
| MapType | Map | 支持 Map 嵌套 |
| RowType | Struct | 支持 Struct 嵌套（2.0.10 和 2.1.3 版本开始支持） |