SAP HANA SDI Monitoring

SDI (Smart Data Integration) is a complementary tool to SAP HANA.
It enables data to be integrated into SAP HANA in real time. 
This monitor supervises SAP HANA SDI remote subscriptions and raises
 alarms when replication transactions are not processed within expected delays.

What Can Be Monitored

You can detect and alert on:

Replication lag for SDI subscriptions (last processed transaction too old)
Missing expected SDI subscription flow (when a row is marked as mandatory)
Number of delayed SDI transactions for a filter set (aggregate mode)

This supports proactive detection of stopped or delayed SDI replication pipelines.

Monitored Data

The monitor queries SAP HANA view M_REMOTE_SUBSCRIPTIONS and collects:

Field	Description
`SCHEMA_NAME`	Schema owning the remote subscription.
`SUBSCRIPTION_NAME`	SDI subscription name.
`REMOTE_SOURCE_NAME`	Remote source associated with the subscription.
`STATE`	Current subscription state.
`LAST_PROCESSED_TRANSACTION_TIME`	Timestamp of the last processed transaction (timezone-adjusted before evaluation).

Configuration Hints

One surveillance row targets a subset of SDI entries using filters (Schema, Subscription, Remote source, State).
Filters support * and special matching patterns.
Max age (in minutes) is mandatory in practice: define a numeric threshold or a threshold expression.
Threshold breach is evaluated when age_in_minutes >= configured_threshold.
If Aggregates is enabled, one alarm is generated per row with the number of delayed transactions.
If Aggregates is disabled, one alarm is generated per delayed SDI entry.
If Mandatory is enabled and no SDI entry matches the row filters, a “not found” alarm is generated.
If Severity is disabled, no alarm is raised for the row.
Auto clear controls whether alarms are clearable when condition recovers.

Configuration

Monitoring Parameters

Parameter	Type	Required	Default	Description
Auto clear	Boolean	Yes	`true`	Alarms generated by this monitor are clearable when condition recovers.

Surveillance Table

Field	Required	Default	Description
Active	Yes	`true`	Enables/disables this surveillance row.
Mandatory	Yes	`false`	If enabled, raises an alarm when no SDI entry matches row filters.
Schema	Yes	`*`	Schema filter for SDI entries.
Subscription	Yes	`*`	Subscription filter for SDI entries.
Remote source	Yes	`*`	Remote source filter for SDI entries.
State	Yes	`*`	State filter for SDI entries.
Max age (in minutes)	Yes	(empty)	Delay threshold expression for transaction age. Alarm when current age reaches/exceeds threshold.
Aggregates	Yes	`true`	If enabled, sends one aggregated alarm per row; otherwise sends one alarm per matching delayed SDI entry.
Severity	Yes	`Minor`	Alarm severity used when threshold is breached.
Alarm tag	No	(empty)	Optional custom alarm tag.
Alarm	No	`true`	Enables/disables alarm generation for this row.

Alarm Conditions

For each active surveillance row:

Row is evaluated only if Alarm is enabled and Severity is not disabled.
SDI entries are matched by Schema, Subscription, Remote source, and State filters.
For each matched SDI entry, delay is computed from current time and LAST_PROCESSED_TRANSACTION_TIME.
Delay alarm: triggered when delay_minutes >= Max age threshold.
If Mandatory=true and no SDI entry matches filters, a “not found” alarm is triggered.
If Aggregates=true, delayed entries are grouped into one alarm for the row.

Generated Metrics

This monitor does not emit dedicated time-series metrics. It generates alarms based on SDI transaction age evaluation.

Generated Alarms

Alarm messages include SDI context, for example:

transaction not processed since more than X minutes (>=Y) for <schema>:<subscription>:<remoteSource> on state <state>
N transaction(s) not processed since more than X minutes, Schema:<schema>, Subscription:<subscription>, Source:<remoteSource>
SDI transaction not found for <schema>:<subscription>:<remoteSource>

Example

Active	Mandatory	Schema	Subscription	Remote source	State	Max age (in minutes)	Aggregates	Severity	Alarm tag	Alarm
true	false	`*`	`*`	`*`	`*`	`G2W:15 W2M:30 M2C:60`	true	3	`HANA,SDI`	true
true	true	`INSTANCE_SDI_DB_1`	`ALG_SRV_SUB`	`AGL_REMOTE_DB_1`	`AGL_CHANGE_DATA`	`10`	false	4	`HANA,SDI,MANDATORY`	true

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