VNX NETAPP NAS Backup Recovery

Source: Internet
Author: User

How many times a snapshot is made is customized, such as it can be done every 4 hours.


For example there are a,b,c,d of four files.


1) First Snapshot (COW):

The snapshot is instantaneous, when the camera creates a snapshot space, for example, 20%, then changes the a file to A1 (the change is compared to the time of the photo), Checkpoint/snap shot is a file, and then back up the CK. Restore the words according to CK's pointer (pointing to the source file) +ck file (a file before the change) to recover.

Then if you change a again, it just overwrites the source file A1, and does not overwrite the a file in CK.



2) Second Snapshot:

After taking pictures and then changed the A1 file to A2, and then change the B file to B1,ck content is a1+b, restore the words ibid, need source file +ck.


3) Third Snapshot:

After taking photos, the A2B1CD all deleted, then CK file is A2B1CD, that is, the same as the source file (beyond the CK set value, will be alerted, but CK capacity will automatically extend), the recovery is the CK in the data is fully restored.

VNX NETAPP NAS Backup Recovery

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.