16.6.3. Event Reports Generated in MySQL Cluster
In this section, we discuss the types of event logs provided by
MySQL Cluster, and the types of events that are logged.
MySQL Cluster provides two types of event log. These are the
cluster log, which includes
events generated by all cluster nodes, and
node logs, which are local to
each data node.
Output generated by cluster event logging can have multiple
destinations including a file, the management server console
window, or syslog. Output generated by node
event logging is written to the data node's console window.
Both types of event logs can be set to log different subsets of
events.
Note: The cluster log is the
log recommended for most uses because it provides logging
information for an entire cluster in a single file. Node logs
are intended to be used only during application development, or
for debugging application code.
Each reportable event can be distinguished according to three
different criteria:
Category: This can be any one of the
following values: STARTUP,
SHUTDOWN, STATISTICS,
CHECKPOINT,
NODERESTART,
CONNECTION, ERROR, or
INFO.
Priority: This is represented by one of
the numbers from 1 to 15 inclusive, where 1 indicates
“most important” and 15 “least
important.”
Severity Level: This can be any one of
the following values: ALERT,
CRITICAL, ERROR,
WARNING, INFO, or
DEBUG.
Both the cluster log and the node log can be filtered on these
properties.
