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Will an Incremental Synchronization Overwrite Existing Data on a Launched Target Server?
Updated on 2023-03-16 GMT+08:00
Will an Incremental Synchronization Overwrite Existing Data on a Launched Target Server?
Whether an incremental synchronization overwrites existing data on a target server depends on the migration method used.
- If the block-level migration method was used, the existing data on target server will be overwritten by data from the source server.
- If the Linux file-level migration method was used, the advanced migration option Exclude Sync Paths is available. You can use this option to prevent the existing data in specific paths on the target server from being overwritten. The existing data in the other paths will be overwritten by the data in the corresponding paths on the source server.
Reasons
- Linux file-level migrations use rsync for synchronization. During a synchronization, data changes are identified by data comparison between the source and target servers. These changes will be synchronized to the target server, and existing data on the target server will be overwritten or deleted.
- Block-level migrations are performed by block. During a synchronization, the system identifies the differences between disk blocks on the source and target servers. It does not compare data stored in disk blocks. The changed disk blocks on the source server will be synchronized to the target server, and new data on the target server will be overwritten.
Parent topic: Product Consultation
Product Consultation FAQs
- Can I Migrate Physical Servers and VMs from Other Clouds to Huawei Cloud Using SMS?
- Can I Migrate ECSs from Huawei Cloud to On-Premises Environments or Other Clouds Using SMS?
- Can I Ask Huawei Cloud Technical Support to Help Me Migrate Services?
- Can I Migrate Workloads to a DeH, DeC, Kunpeng ECS, or BMS Using SMS?
- Does SMS Support Resumable Data Transfer?
- How Do I Migrate an ECS from One Account to Another?
- How Do I Migrate an ECS from One Region to Another Using SMS?
- Will My Services on the Source Server Be Interrupted During Migration?
- How Do I Create an AK/SK Pair for a Huawei Cloud Account?
- How Do I Create an AK/SK Pair for an IAM User?
- How Do I Migrate a Linux Source Server as a Non-root User?
- What Information Does SMS Collect About Source Servers?
- How Do I Select a Target Server?
- How Do I Create an ECS?
- What Is the Block-Level Migration?
- What are Valid Data Blocks?
- How Does Migration Using SMS Differ from Migration Using IMS?
- Why Is the OS Name of the Target ECS Displayed on the ECS Console Different from That of the Source Server?
- How Do I Determine Whether a Migration Is Complete?
- Can I Migrate Only Some Services on the Source Server?
- Can the Target Server Run a Different Type of OS from the Source Server?
- What Determines the Specifications of a Target Server?
- Which Download Option Should I Choose When I Download the Windows Agent?
- Can I Migrate a Source Server If There Is No Corresponding Image Available on Huawei Cloud?
- How Does SMS Differ from IMS in the Migration Scenario?
- How Do I Display the OS Name of a Target Server on the ECS Console?
- What Are the Snapshots of a Target Server Used for?
- In a Linux File-Level Migration, How Do I Exclude Directories from Migration and Synchronization?
- Will an Incremental Synchronization Overwrite Existing Data on a Launched Target Server?
- How Do I Create a Target Server that Meets the SMS Requirements?
- Can SMS Migrate Self-built Databases, Big Data Services, or Websites Deployed on a Source Server?
- Can the AK/SK of a Federated User (Virtual IAM User) Be Used for Authentication During the SMS-Agent Startup?
- How Do I Synchronize Files in Specific Directories After a Linux File-Level Migration Is Complete?
- Will the Migration Be Affected If the SSH Service Does Not Use Default Port 22 on the Source Server?
- How Do I Obtain the SMS Domain Name?
- How Many Resources Will Be Used for a Linux Block-Level Migration?
- How Do I Configure Data Compression for a Linux Block-Level Migration?
- Do I Need to Activate My Windows OS and Paid Software After the Migration?
- Why Does the Target Server Not Synchronize the Clocks on the Source Server?
- How Do I Set the Number of Concurrent Processes for Linux File-Level Migrations?
- Which Directories Are Not Synchronized by Default During Incremental Synchronization on a Linux Server?
- How Do I Verify Data Consistency Between the Source and Target Servers?
- Can I Use a Temporary AK/SK Pair for Migration?
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