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Qumulo Core Advanced Data Integrity

IN THIS ARTICLE 

This article explains the operation of the Advanced Data Integrity feature in Qumulo Core.

USING CHECKSUMS TO PROTECT YOUR DATA

To safeguard customer data, Qumulo Core has features such as protection against media failure and validation of data integrity on aging media by means of a disk scrubber. The following list gives some common examples of common causes of issues with aging media that Qumulo Core protects against.

Media Issue Common Cause
Bit error or bit rot Aging media
Lost data on power-off Firmware power state issue
Write bad data or location Firmware writing bug
Read bad data Firmware caching bug

To complement our existing protection against media errors, firmware issues, and bit errors, the Advanced Data Integrity (ADI) feature ensures that your file system and metadata have checksums on all data stored in your Qumulo cluster.

Phases of ADI Availability

We plan to release the ADI feature in three phases.

  • Phase 1: New clusters, except for K-144T, K-168T, and QC360
    We released this phase with Qumulo Core 5.0.4. For all new clusters deployed with this version of Qumulo Core, this feature is enabled automatically, except on nodes that have SSD space constraints.
  • Phase 2: Upgrade for existing clusters, except for K-144T, K-168T, and QC360
  • Phase 3: New and upgraded clusters, including K-144T, K-168T, and QC360

Verifying ADI Availability on Your Cluster

To verify that ADI is enabled on your cluster, use the qq checksumming_get_status CLI command.

RESOLUTION 

You now understand how Advanced Data Integrity protects the data on your Qumulo cluster.

 

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