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Dell PowerFlex 4.5.x Administration Guide

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NAS server settings

PowerFlex Manager allows you to configure a Common Event Publishing Agent (CEPA) configuration for NAS servers to receive event notifications. CEPA is a part of the Dell Common Event Enabler (CEE) package, which runs on Windows or Linux servers. The CEE framework is used to provide a working environment for the CEPA facility. It consists of two parts—Common Antivirus Agent (CAVA) and CEPA.

CEPA includes the following subfacilities:

  • Auditing—A mechanism for delivering postevents to registered consumer applications in a synchronous manner. Events are delivered individually in real-time.
  • Backup—A mechanism for delivering postevents in bulk mode to backup applications. A backup-specific delivery cadence is based on either a time period or a number of events.
  • Content or quota management (CQM)—A mechanism for delivering preevents to registered consumer applications in a synchronous manner. Events are delivered individually in real-time, allowing the consumer application to exercise business policy on the event.
  • Indexing—A mechanism for delivering events to Splunk Enterprise or the Splunk Cloud in asynchronous mode. The delivery cadence is based on either a time period or a number of events.
  • MessageExchange—A mechanism for delivering postevents in asynchronous mode, when needed, without consumer use of the CEPA API. Events are published from CEPA to the RabbitMQ CEE_Events exchange. A consumer application creates a queue for itself in the exchange from which it can retrieve events.
  • Common Asynchronous Publishing Service (VCAPS)—A mechanism for delivering postevents in asynchronous mode. The delivery cadence is based on a time period or a number of events.
NOTE:If both CQM events and Auditing events are present, CEPA delivers events to the CQM application first, and then delivers events to the Auditing application.

For more information about CEE CEPA, see Using the Common Event Enabler on www.dell.com/support.

CEPA is a mechanism where applications can register to receive event notification and context from the PowerFlex file system. The event publishing agent delivers the event notification and associated context in one message to the consumer application. The context may consist of file metadata or directory metadata that is needed to decide business policy.

You can associate CEPA configurations with NAS servers through event publishers. The event publishers can be grouped in event publisher pools.

Event publishers

The events publisher specifies one to three publishing pools and enables configuration of advanced settings.

  • Pre-Events Failure Policy—Determines the pre-event behavior if PowerFlex File cannot reach the CEPA Server.
    • Ignore (default)—Consider preevents acknowledged when CEPA servers are offline.
    • Deny—Deny user access when a corresponding pre-event request to CEPA servers failed.
  • Post-Events Failure Policy—Determines the post-event behavior if PowerFlex File cannot reach CEPA Server.
    • Ignore—Continue and tolerate lost events.
    • Accumulate (default)—Continue and persist lost events in an internal buffer.
    • Guarantee—Persist lost events, deny file systems access when the buffer is full.
    • Deny—Deny access to file systems when CEPA servers are offline.
  • Connectivity and protocol settings
    • HTTP and Port—HTTP and 12228, by default
    • Microsoft RPC and Accounts—Enabled and SMB, by default
    • Heartbeat and Timeout—10 sec and 1000 millisecond, by default

In the Event Publishers tab, you can create, modify, delete, associate, or dissociate CEPA event publishers.

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