What Are the Differences Between CDM and Other Data Migration Services?
HUAWEI CLOUD provides the following data migration services:
- Cloud Data Migration (CDM)
- Object Storage Migration Service (OMS)
- Data Replication Service (DRS)
- Server Migration Service (SMS)
- Database and Application Migration UGO
- Data Express Service (DES)
For details about the differences between the preceding services, see Differences Between Data Migration Services.
CDM
Cloud Data Migration (CDM) is an efficient and easy-to-use batch data integration service. DataArts Studio CDM is an efficient and easy-to-use batch data migration service. Based on the big data migration to the cloud and intelligent data lake solutions, CDM provides easy-to-use migration capabilities and can integrate various types of data sources into the data lake, which simplifies data source migration and integration and improves efficiency for you. For details, see What Is CDM?.
CDM can migrate data from a database or object storage to a data lake or big data system.
Differences between CDM and DRS:
- If the destination is a big data system, CDM is recommended.
- If the destination is an OLTP database or DWS, DRS is recommended.
Differences between CDM and OMS:
- OMS is used to migrate data from the following clouds to HUAWEI CLOUD: Amazon Web Services (AWS), Alibaba Cloud, Microsoft Azure, Baidu Cloud, QingCloud, Qiniu Cloud, and Tencent Cloud.
- CDM is mainly used to migrate OBS data to a data lake or big data system for data development, cleaning, and governance. However, use OMS if you want to migrate an entire bucket.
OMS
OMS helps you migrate data from object storage on other clouds online to the OBS on HUAWEI CLOUD. For details, see Object Storage Migration Service.
OMS provides the following functions:
- Online data migration: It helps you easily and smoothly migrate object storage data from the public cloud of other cloud service providers to HUAWEI CLOUD.
- Cross-region replication: It enables you to replicate and back up data across regions of HUAWEI CLOUD.
Currently, OMS can migrate object storage data of the following clouds to HUAWEI CLOUD: Amazon Web Services (AWS), Alibaba Cloud, Microsoft Azure, Baidu Cloud, HUAWEI CLOUD, Kingsoft Cloud, QingCloud, Qiniu Cloud, and Tencent Cloud.
CDM can also migrate object storage data. However, CDM and OMS differ in the following way:
- OMS is used to migrate data from other clouds to HUAWEI CLOUD.
- CDM is mainly used to migrate OBS data to a data lake or big data system for data development, cleaning, and governance.
DRS
DRS is a stable, efficient, and easy-to-use cloud service for database online migration and synchronization in real time. DRS is used to migrate data from mainstream databases to other databases (including third-party databases), for example, from OLTP to OLTP or DWS. For details, see Data Replication Service.
Currently, the following database links are supported:
MySQL databases on HUAWEI CLOUD or other clouds to RDS for MySQL
PostgreSQL databases on HUAWEI CLOUD or other clouds to RDS for PostgreSQL
MongoDB databases on HUAWEI CLOUD or other clouds to DDS
Oracle->RDS for MySQL
......
Differences between DRS and CDM:
- DRS migrates data to a database, for example, a MySQL or a MongoDB database.
- CDM migrates data to a data lake or big data system, for example, MRS HDFS or FusionInsight HDFS.
Differences between DRS and UGO:
- DRS is used for full/incremental data migration or synchronization.
- UGO is used for the evaluation, structure migration, and syntax conversion before a heterogeneous database migration.
SMS
SMS is a P2V/V2V migration service that helps you migrate applications and data from on-premises x86 physical servers or VMs on private or public clouds to ECSs on HUAWEI CLOUD.
UGO
UGO is a professional cloud service that focuses on heterogeneous database structure migration. It automatically converts the syntax of the DDL in databases and the database SQL statements encapsulated in service programs into the SQL syntax of GaussDB or RDS on HUAWEI CLOUD. It uses pre-migration evaluation, structure migration, and automatic syntax conversion to identify possible reconstruction in advance, improve the conversion rate, and minimize the database migration cost. For details, see Database and Application Migration UGO.
In short, UGO is used for the evaluation, structure migration, and syntax conversion before a heterogeneous database migration.
DES
DES provides you with physical devices to make it easier to migrate terabytes, or even petabytes of data to HUAWEI CLOUD inexpensively and much faster than would be possible over a network connection. For details, see Data Express Service.
Differences Between Data Migration Services
Service Name |
Functions |
Differences with Other Services |
|---|---|---|
CDM |
|
Differences with DRS: DRS is used to migrate databases, while CDM is used to migrate data to big data systems. |
OMS |
Object storage migration
|
Differences with CDM: OMS is used to migrate data from other clouds to HUAWEI CLOUD, while CDM is mainly used to migrate OBS data to a data lake or big data system for data development, cleaning, and governance. |
DRS |
Migrates data between mainstream databases and HUAWEI CLOUD.
|
|
SMS |
Server migration Migrates data from physical servers or VMs on private or public clouds to HUAWEI CLOUD |
- |
UGO |
|
Differences with DRS: DRS is used to migrate and synchronize data between homogeneous and heterogeneous databases, while UGO is used to migrate the structure and syntax of heterogeneous databases and evaluate the migration. |
DES |
|
- |
DataArts Migration FAQs
- What Are the Differences Between CDM and Other Data Migration Services?
- What Are the Advantages of CDM?
- What Are the Security Protection Mechanisms of CDM?
- How Do I Reduce the Cost of Using CDM?
- Will I Be Billed If My CDM Cluster Does Not Use the Data Transmission Function?
- Why Am I Billed Pay per Use When I Have Purchased a Yearly/Monthly CDM Incremental Package?
- How Do I Check the Remaining Validity Period of a Package?
- Can CDM Be Shared by Different Tenants?
- Can I Upgrade a CDM Cluster?
- How Is the Migration Performance of CDM?
- What Is the Number of Concurrent Jobs for Different CDM Cluster Versions?
- Does CDM Support Incremental Data Migration?
- Does CDM Support Field Conversion?
- What Component Versions Are Recommended for Migrating Hadoop Data Sources?
- What Data Formats Are Supported When the Data Source Is Hive?
- Can I Synchronize Jobs to Other Clusters?
- Can I Create Jobs in Batches?
- Can I Schedule Jobs in Batches?
- How Do I Back Up CDM Jobs?
- How Do I Configure the Connection If Only Some Nodes in the HANA Cluster Can Communicate with the CDM Cluster?
- How Do I Use Java to Invoke CDM RESTful APIs to Create Data Migration Jobs?
- How Do I Connect the On-Premises Intranet or Third-Party Private Network to CDM?
- Does CDM Support Parameters or Variables?
- How Do I Set the Number of Concurrent Extractors for a CDM Migration Job?
- Does CDM Support Real-Time Migration of Dynamic Data?
- Can I Stop CDM Clusters?
- How Do I Obtain the Current Time Using an Expression?
- What Should I Do If the Log Prompts that the Date Format Fails to Be Parsed?
- What Can I Do If the Map Field Tab Page Cannot Display All Columns?
- How Do I Select Distribution Columns When Using CDM to Migrate Data to DWS?
- What Do I Do If the Error Message "value too long for type character varying" Is Displayed When I Migrate Data to DWS?
- What Can I Do If Error Message "Unable to execute the SQL statement" Is Displayed When I Import Data from OBS to SQL Server?
- What Should I Do If the Cluster List Is Empty, I Have No Access Permission, or My Operation Is Denied?
- Why Is Error ORA-01555 Reported During Migration from Oracle to DWS?
- What Should I Do If the MongoDB Connection Migration Fails?
- What Should I Do If a Hive Migration Job Is Suspended for a Long Period of Time?
- What Should I Do If an Error Is Reported Because the Field Type Mapping Does Not Match During Data Migration Using CDM?
- What Should I Do If a JDBC Connection Timeout Error Is Reported During MySQL Migration?
- What Should I Do If a CDM Migration Job Fails After a Link from Hive to DWS Is Created?
- How Do I Use CDM to Export MySQL Data to an SQL File and Upload the File to an OBS Bucket?
- What Should I Do If CDM Fails to Migrate Data from OBS to DLI?
- What Should I Do If a CDM Connector Reports the Error "Configuration Item [linkConfig.iamAuth] Does Not Exist"?
- What Should I Do If Error Message "Configuration Item [linkConfig.createBackendLinks] Does Not Exist" Is Displayed During Data Link Creation or Error Message "Configuration Item [throttlingConfig.concurrentSubJobs] Does Not Exist" Is Displayed During Job Creation?
- What Should I Do If Message "CORE_0031:Connect time out. (Cdm.0523)" Is Displayed During the Creation of an MRS Hive Link?
- What Should I Do If Message "CDM Does Not Support Auto Creation of an Empty Table with No Column" Is Displayed When I Enable Auto Table Creation?
- What Should I Do If I Cannot Obtain the Schema Name When Creating an Oracle Relational Database Migration Job?
- What Should I Do If invalid input syntax for integer: "true" Is Displayed During MySQL Database Migration?
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