What is Data rehydration

 Once you capture your data onto the Transfer Appliance, ship the appliance to the Google upload facility for rehydration. Data rehydration is the process by which you fully reconstitute the files so you can access and use the transferred data.

To rehydrate data, the data is first copied from the Transfer Appliance to your Cloud Storage staging location. The data uploaded to your staging location is still compressed, deduplicated and encrypted. Data rehydration reverses this process and restores your data to a usable state. As the data is rehydrated, it is moved to the Cloud Storage destination bucket that you created.

To perform data rehydration, use a Rehydrator instance, which is a virtual appliance that runs as a Compute Engine instance on Google Cloud Platform.

The Transfer Appliance Rehydrator compares the CRC32C hash value of each file being rehydrated with the hash value computed when the file was captured. If the checksums don't match, the file is skipped and appears in the skip file list with the message "Data corruption detected".

Comments

Post a Comment

Popular posts from this blog

SQL basic interview question

Image
Question #1) What is SQL? Structured Query Language is a database tool which is used to create and access database to support software application. Question #2) What are tables in SQL? The table is a collection of record and its information at a single view. Question #3) What are different types of statements supported by SQL? There are 3 types of SQL statements 1) DDL (Data Definition Language):  It is used to define the database structure such as tables. It includes three statements such as Create, Alter, and Drop. Some of the DDL Commands are listed below CREATE : It is used for creating the table. 1 CREATE   TABLE  table_name 2 column_name1 data_type( size ), 3 column_name2 data_type( size ), 4 column_name3 data_type( size ), ALTER:  The ALTER table is used for modifying the existing table object in the database. ALTER TABLE table_name ADD column_name datatype OR ALTER TABLE table_name DROP ...
Read more

gsutil Vs Storage Transfer Service Vs Transfer Appliance

When transferring data from an on-premiss location, use gsutil When transferring data from another cloud storage provider, use storage transfer service gsutil is a Python application that lets you access Cloud Storage from the command line. You can use gsutil to do a wide range of bucket and object management tasks, including: Creating and deleting buckets. Uploading, downloading, and deleting objects. Listing buckets and objects. Moving, copying, and renaming objects. Editing object and bucket ACLs. gsutil performs all operations, including uploads and downloads, using HTTPS and transport-layer security (TLS). For a complete list of guides to completing tasks with gsutil, see  Cloud Storage How-to Guides . Storage Transfer Service is a product that enables you to: Move or backup data to a Cloud Storage bucket either from other cloud storage providers or from your  on-premises  storage. Move data from one Cloud Storage bucket to another, so that it is available to differe...
Read more