Dell PowerFlex 4.5.x Administration Guide

Events Publishing allows third-party applications to register to receive event notification and context from the storage system when accessing file systems by using the SMB or NFS protocols. The Common Event Publishing Agent (CEPA) delivers to the application both event notification and associated context in one message. Context may consist of file metadata or directory metadata that is needed for business policy.

You must define at least one event option (pre-, post-, or post-error event) when Events Publishing is enabled.

• Pre-event notifications are sent before processing an SMB or NFS client request.
• Post-event notifications are sent after a successful SMB or NFS client request.
• Post-error event notifications are sent after a failed SMB or NFS client request.

Attributes	Description
NAS server	Identifies the associated NAS server.
Enabled	Identifies whether Events Publishing is enabled on the NAS Server. Valid values are: yes no (default)
Pre-event failure policy	The policy applied when a pre-event notification fails. Valid values are: ignore (default)—Indicates that when a pre-event notification fails, it is acknowledged as being successful. deny—Indicates that when a pre-event notification fails, the request of the SMB or NFS client is not performed by the storage system. The client receives a 'denied' response.
Post-event failure policy	The policy applied when a post-event notification fails. The policy is also applied to post-error events. Valid values are: ignore (default)—Continue and tolerate lost events. accumulate—Continue and use a persistence file as a circular event buffer for lost events. guarantee—Continue and use a persistence file as a circular event buffer for lost events until the buffer is filled, and then deny access to file systems where Events Publishing is enabled. deny—On CEPA connectivity failure, deny access to file systems where Events Publishing is enabled.
HTTP port	The HTTP port number used for connectivity to the CEPA server. The default value is 12228. The HTTP protocol is used to connect to CEPA servers. It is not protected by a username or password.
HTTP enabled	Identifies whether connecting to CEPA servers by using the HTTP protocol is enabled. When enabled, a connection by using HTTP is tried first. If HTTP is either disabled or the connection fails, then connection through the MS-RPC protocol is tried if all CEPA servers are defined by a fully qualified domain name (FQDN). When an SMB server is defined in a NAS server in the Active Directory (AD) domain, the NAS server's SMB account is used to make an MS-RPC connection. Valid values are: yes(default) no
Username	When using the MS-RPC protocol, you must provide the name of a Windows user allowed to connect to CEPA servers.
Password	When using the MS-RPC protocol, you must provide the password of the Windows user that is defined by the username.
Heartbeat	Time interval (in seconds) between scanning CEPA servers to detect their online or offline status. The default is 10 seconds. The range is from 1 through 120 seconds.
Timeout	Time in milliseconds (millisecond) to determine whether a CEPA server is offline. The default is 1,000 millisecond. The range is from 50 millisecond through 5,000 millisecond.
Health state	Health state of Events Publishing. The health state code appears in parentheses. Valid values are: OK (5)—The Events Publishing service is operating normally. OK_BUT (7)—Some CEPA servers configured for the NAS server cannot be reached. Minor failure (15)—The Events Publishing service is not functional. Major failure (20)—All CEPA servers configured for the NAS server cannot be reached.