The Availability Manager displays a great deal of OpenVMS Cluster data. The amount of cluster information has increased in each successive version of the product and will probably continue to do so. To accommodate future growth in this area, beginning with Availability Manager Version 2.2, OpenVMS Cluster information is documented in a separate chapter of this manual.

By clicking a series of "handles" on the cluster node tree in the Cluster Members pane of the Cluster Summary page (Figure 4-1), you can open lines of data to display progressively more detailed cluster data. This chapter describes the data you can display.

Support for Managed Objects

New support has been added to the OpenVMS Data Collector, RMDRIVER, for OpenVMS managed objects, which are operating system components with characteristics that allow the Availability Manager to manage them. Managed objects, which register themselves with the Data Collector at system startup, not only provide data but also implement fixes in response to client requests.

In OpenVMS Version 7.3 and later versions, cluster data and fixes are available for LAN virtual circuits through the managed object interface. When the Availability Manager Data Analyzer connects to a Data Collector node, it retrieves a list of the managed objects on that node, if any. For such a node, the Availability Manager can provide additional details and any new data that would otherwise be unavailable.

LAN Displays

When you monitor OpenVMS Version 7.3 and later nodes with managed objects enabled, additional cluster data and fixes are available for LAN virtual circuits. This data includes enhanced LAN virtual circuit summary data in the Cluster Summary window and the LAN Virtual Circuit Details (NISCA) window. In addition, the Cluster Summary includes virtual circuit, channel, and device fixes. If managed object support is not enabled for a Data Collector node, then only basic virtual circuit data is available.

4.1 OpenVMS Cluster Summary Page

To display the OpenVMS Cluster Summary page (Figure 4-1), click the Cluster Summary tab on an OpenVMS Node Summary page (Figure 1-5).

The Cluster Summary page contains cluster interconnect information for an entire cluster as well as detailed information about each node in the cluster, including System Communications Services (SCS) circuits and connections for individual nodes.

The data items shown on this page correspond to data that the Show Cluster utility (SHOW CLUSTER) displays for the SYSTEMS, MEMBERS, CONNECTIONS, and CIRCUITS classes. No SHOW CLUSTER counterpart exists for the PEDRIVER LAN virtual circuit, channel, and device detail displays. The data items shown on the page also correspond to data that the SCACP utility displays for SHOW commands that display PORT, CIRCUIT, VC, CHANNEL, and LAN DEVICE information.

Figure 4-1 OpenVMS Cluster Summary

The two panes in the Cluster Summary page display the following information:

• The Summary pane (top) displays summary information about the entire cluster.
• The Cluster Members pane (bottom) displays detailed information about each node in the cluster, including its System Communication Architecture (SCA) connections with other nodes.

The Availability Manager signals the LOVOTE event when cluster votes minus cluster quorum is less than the threshold value for the event. (The default threshold for the LOVOTE event is 1.)

LOVOTE, 'node' VOTES count is close to or below QUORUM

4.1.2 OpenVMS Cluster Summary Pane

Table 4-1 describes the data in the OpenVMS Cluster Summary pane (Figure 4-1).

Table 4-1 Summary Pane Data

Data	Description
Formed	Date and time the cluster was formed.
Last Trans	Date and time of the most recent cluster state transition.
Votes	Total number of quorum votes being contributed by all cluster members and by the quorum disk.
Expected Votes	The expected votes contribution by all members of the cluster. This value is calculated from the maximum EXPECTED_VOTES system parameter and the maximized value of the VOTES system parameter.
Failover Step	Current failover step index. Shows which step in the sequence of failover steps the failover is currently executing.
Members In	Number of cluster members to which the Availability Manager has a connection.
Members Out	Number of cluster members to which the Availability Manager either has no connection or has lost its connection.
Quorum 1	Number of votes that must be present for the cluster to function and to permit user activity, that is, to "maintain cluster quorum."
QD Votes	Number of votes given to the quorum disk. A value of 65535 means no quorum disk exists.
Failover ID	Failover instance identification. Unique ID of a failover sequence that indicates to system managers whether a failover has occurred since the last time they checked.

The Cluster Members pane (the lower pane on the Cluster Summary page (Figure 4-1) lists all the nodes in the cluster and provides detailed information about each one. Figure 4-2 shows only the Cluster Members pane.

Figure 4-2 OpenVMS Cluster Members Pane

The first level of information in the Cluster Members pane is cluster member data, which is described in Table 4-2.

Table 4-2 Cluster Member Data

Data	Description
SCS Name	System Communications Services (SCS) name for the node (system parameter SCSNODE).
SCSID	SCS identification for the node (system parameter SCSYSTEMID).
CSID	Cluster system identification.
Votes	Number of votes the member contributes.
Expect	Member's expected votes as set by the EXPECTED_VOTES system parameter.
Quorum	Number of votes that must be present for the cluster to function and permit user activity, that is, to "maintain cluster quorum."
LckDirWt	Lock manager distributed directory weight as determined by the LCKDIRWT system parameter.
Status	Current cluster member status: Status Value Description NEW New system in cluster. BRK_NEW New system; there has been a break in the connection. MEMBER System is a member of the cluster. BRK_MEM Member; there has been a break in the connection. NON System is not a member of the cluster. BRK_NON Nonmember; there has been a break in the connection. REMOVED System has been removed from the cluster. BRK_REM System has been removed from the cluster, and there has also been a break in the connection.
Transition Time	The time of the system's last change in cluster membership status.

4.2 Summary Data in the Cluster Members Pane

The following sections contain descriptions of the categories of summary data displayed in the Cluster Members pane (Figure 4-2).

When you click the handle before an SCS (System Communications Services) Name, the Availability Manager first displays a Ports heading, if managed object data collection is enabled on this SCS node.

A port is an OpenVMS device that provide SCA (System Communications Architecture) services. Port summary data is discussed in Section 4.2.1. Below the Ports heading is the Circuits heading, which precedes a line of SCA headings. (SCA data is discussed in Section 4.2.2.)

4.2.1 Port Summary Data

When you initially click the handle in front of Ports in the Cluster Members pane (Figure 4-1) to a vertical position, Ports headings are displayed, with information about port interfaces on the local system, as shown in Figure 4-3.

Figure 4-3 Port Summary Data

The port summary data shown in Figure 4-3 is described in Table 4-3. Data items in this table are related to the SCACP utility SHOW PORTS display and the SHOW CLUSTER utility LOCAL_PORT CLASS display.

Table 4-3 Local Port Data

Data		Description
Local Port:
	Name	Device name of the port.
	Number	The local port's interconnect address or other interconnect-specific identifier.
Mgmt Priority		Management priority assigned to the port.
Load Class		Hard-coded capacity value of the port, based on the rate (in megabits/second) of the interconnect of the port.
Messages Sent:
	Count	Total number of messages sent since the port was initialized.
	Rate	Rate at which messages are sent (per second).
Messages Received:
	Count	Total number of messages sent since the port was initialized.
	Rate	Rate at which SCS messages are received (per second).
Datagrams Sent:
	Count	Total number of SCS datagrams sent since the port was initialized.
	Rate	Rate at which SCS datagrams are sent (per second).
Datagrams Received:
	Count	Total number of SCS datagrams sent since the port was initialized.
	Rate	Rate at which SCS datagrams are sent (per second).
Kilobytes Mapped		Number of kilobytes mapped for block transfer.

4.2.2 SCA (System Communications Architecture) Summary Data

Below the Circuits heading in Figure 4-4 is a line of SCA summary headings that include information about a node's SCS circuits between local SCA ports and remote SCA ports on other nodes in the cluster. More than one circuit indicates more than one communications path to the other node.

The data displayed in Figure 4-4 is similar to the information that the Show Cluster utility (SHOW CLUSTER) displays for the CIRCUITS, CONNECTIONS, and COUNTERS classes and that the SCACP utility's SHOW CIRCUITS command displays. Note that circuit count is the total number of events since the the state of the circuit changed to OPEN.

Starting with Availability Manager Version 2.2, the circuits display shows circuits to non-OpenVMS nodes, such as storage controllers.

Figure 4-4 SCA Summary Data

Table 4-4 describes the SCA summary data displayed under the Circuits heading in Figure 4-4. Each line of data shows either a summary of an SCS connection between a local system connection of an application (or SYSAP) to a remote SYSAP that uses the circuit, or a summary of interconnect-specific information about the operation of the circuit.

Some of the data described in Table 4-4 is not displayed in Figure 4-4 because the screen display is wider than shown. You can scroll to the right on your terminal screen to display the remaining fields described in the table.

Table 4-4 SCA Summary Data

Data		Description
Remote Node		SCS name of the remote node containing the remote port of the circuit.
Local Port		The device name of the local port associated with the circuit.
Remote Port:
	Type	The remote port's device or interconnect type associated with the circuit (for example, LAN, CIPCA, DSSI).
	Number	The remote port's interconnect address, or another other interconnect-specific unique identifier.
State		The state of the virtual circuit connection.
Priority:
	Curr	Circuit's current priority, which is the sum of the management priorities assigned to the circuit and associated local port.
	Mgmt	Priority value assigned to the circuit by management action.
Load Class		The circuit's current capacity rating, derived from the current ECS member's load class values.
Message Rates:
	Sent	Count/rate of SCS messages sent over the circuit.
	Received	Count/rate that SCS messages are received on the circuit.
Block Data (Kilobytes):
	Mapped	Count/rate of kilobytes mapped for block data transfers over the circuit.
	Sent	Count/rate of kilobytes sent over the circuit using transfers.
	Requested	Count/rate of kilobytes requested from the remote port over the circuit using request block data transfers.
Block Data (Count):
	Sent	Count/rate of send block data transfers over the circuit.
	Requested	Count/rate of block data transfer requests sent over the circuit.
Datagrams:
	Sent	Count/rate of SCS datagrams sent over the circuit.
	Received	Count/rate of SCS datagrams received on the circuit.
Credit Wait		Count/rate any connection on the circuit had to wait for a send credit.
Buff Desc Wait		Count/rate any connection over the circuit had to wait for a buffer descriptor.

4.2.3 SCS (System Communications Services) Connections Summary Data

You can click the handle at the beginning of an SCA data row to display the following headings when they apply to a particular node:

• SCS Connections
• LAN Virtual Circuit Summary

To display SCS connections summary data, click the handle at the beginning of the "SCS Connections" row on the Cluster Summary pane (Figure 4-1). Figure 4-5 displays SCS Connections data information.

Figure 4-5 SCS Connections Data

Table 4-5 describes the SCS connections data shown in Figure 4-5. Some of the data described in Table 4-5 is not displayed in Figure 4-5 because the screen display is wider than shown. You can scroll to the right on your terminal screen to display the remaining fields described in the table.

Note that connection count is the total number of events since the state of the connection changed to OPEN.

Table 4-5 SCS Connections Data

Data		Description
SYSAPs:
	Local	Name of the SYSAP (system application) on the local system associated with the connection.
	Remote	Name of the SYSAP on the remote system associated with the connection.
State		The connection's current state. The possible items displayed are: ACCP_SENT---An accept request has been sent. CLOSED---The connection is closed. CON_ACK---A connect request has been sent and acknowledged. CON_REC--- A connect request has been received. CON_SENT--- A connect request has been sent. DISC_ACK---A disconnect is acknowledged. DISC_MTCH---A disconnect request has matched. DISC_REC--- A disconnect request has been received. DISC_SENT---A disconnect request has been sent. LISTEN--- The connection is in the listen state. OPEN---The connection is open. REJ_SENT--- A rejection has been sent. VC_FAI---The virtual circuit has failed.
Message Rates:
	Sent	Count/rate that SCS messages are sent over the connection.
	Received	Count/rate that SCS messages are being received on the connection.
Block Data (Kilobytes):
	Mapped	Count/rate of kilobytes mapped for block data transfers by the local SYSAP using the connection. Note: This field is available only in raw data format.
	Sent	Number of kilobytes sent over the SCS connection by the local SYSAP using send block data transfers.
	Requested	Number of kilobytes requested over the SCS connection by the local SYSAP using request block data transfers.
Block Data (Number):
	Sent	Count/Rate of send block data transfers by this node over the SCS connection.
	Requested	Count/Rate of request block data transfers sent to the remote port over the SCS connection.
Datagrams:
	Sent	Count/Rate of datagrams sent on the SCS connection.
	Received	Count/Rate of datagrams received on the SCS connection.
Credit Wait		Count/Rate of times the connection had to wait for a send credit.
Buff Desc Wait		Count/Rate of times the connection had to wait for a buffer descriptor.