Configuring the content verification service

The content verification service regenerates cryptographic hash values to detect object corruption. Under certain circumstances, you may want to modify or disable this function to reduce the load on the system:

In a namespace that’s not being replicated and that has a service plan that sets the ingest tier DPL to 1 (one) and does not define any additional storage tiers, only one copy of each object exists. Therefore, if the content verification service discovers a discrepancy in the cryptographic hash values for an object, it cannot repair the object from another copy.

You can choose to have the content verification service regenerate hash values only for objects that it could repair if needed. With this option, the service does not regenerate hash values for objects in a namespace if HCP is configured to maintain only one copy of each object in that namespace.

Note: Although the service cannot repair corrupt objects in this situation, it can report them. For this reason, if performance is not an issue, you may want to keep hash-value regeneration enabled for all objects.

When the load on the system is high, temporarily disabling all hash-value regeneration can provide some relief.

The Content Verification page in the HCP System Management Console lets you configure the content verification service. To display this page:

1.In the top-level menu in the System Management Console, mouse over Services to display a secondary menu.

2.In the secondary menu, click on Content Verification.

Roles: To view the Content Verification page, you need the monitor or administrator role. To configure the content verification service, you need the administrator role.

To configure the content verification service:

1.On the Content Verification page, select the appropriate Content Verification Mode option:

oTo configure the content verification service to regenerate hash values for all objects stored in the repository, regardless of the number of copies of each object that HCP must maintain in the repository, select the Check all objects and repair if needed option.

oTo configure the content verification service to regenerate hash values for a given object only when HCP is required to maintain multiple copies of that object in the repository, select the Check only objects that can be repaired and repair if needed option.

oTo completely disable the hash-value regeneration function, select the Do not check and repair objects option.

2.Click on the Update Settings button.

If you selected the second or third Content Verification Mode option, a confirming message appears.

In the window with the confirming message, select I understand to confirm that you understand the consequences of your action. Then click on the Update Settings button.

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