hydra

Class StatMonitorPrms

java.lang.Object

hydra.BasePrms

hydra.StatMonitorPrms

public class StatMonitorPrms
extends BasePrms

A class used to store keys for StatMonitor configuration settings.

Field Summary

Fields

Modifier and Type	Field and Description
static Long	archiveStats (boolean) Whether to archive statistics in the VM running the statmonitor.
static Long	conditions (List of list(s)) Conditions for hostagents to monitor on behalf of the test, which, if violated, should cause the test to take the specified action.
static int	DEFAULT_SAMPLE_RATE_MS
static Long	sampleRateMs (int) Rate at which the monitor should sample statistics and check conditions, in milliseconds.
static Long	verbose (boolean) Whether to log monitoring information each time a condition check is performed.

Fields inherited from class hydra.BasePrms

DASH, DEFAULT, NONE

Constructor Summary

Constructors

Constructor and Description
StatMonitorPrms()

Method Summary

Modifier and Type	Method and Description
static boolean	archiveStats(TestConfig tc)
static Vector	getConditions(TestConfig tc)
static int	getSampleRateMs(TestConfig tc)
static void	main(String[] args)
static boolean	verbose(TestConfig tc)

Methods inherited from class hydra.BasePrms

dumpKeys, keyForName, nameForKey, setValues, tab, tasktab

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

sampleRateMs

public static Long sampleRateMs

(int) Rate at which the monitor should sample statistics and check conditions, in milliseconds. Default is DEFAULT_SAMPLE_RATE_MS. Rate must be at least 1000 (one second) or an error is thrown, to prevent inadvertent oversampling.

DEFAULT_SAMPLE_RATE_MS

public static final int DEFAULT_SAMPLE_RATE_MS

See Also:

Constant Field Values

conditions

public static Long conditions

(List of list(s)) Conditions for hostagents to monitor on behalf of the test, which, if violated, should cause the test to take the specified action. The conditions must be based on statistics available in hostagent VMs. All hostagents use the same set of conditions. The conditions can be used to watch the health of the host represented by the hostagent. Default is null. Can be specified as BasePrms.NONE to turn off monitoring altogether.

A condition consists of five fields: type stat op amount action. Valid types are those available to all VMs running the statistics monitor. Types that include O/S names, such as LinuxSystemStats, should be given simply as SystemStats, since the monitor prepends the appropriate O/S. Valid stats are those available for the type. Valid ops are the constants seen in the javadocs for StatMonitor. Valid amounts are any double. Valid actions are "halt" (to halt the test) and "dump" (to print stacks). For example, SystemStats pagesSwappedIn hasChangedByLessThan 5000 halt".

archiveStats

public static Long archiveStats

(boolean) Whether to archive statistics in the VM running the statmonitor. If true, archives are written to "statmon_/statArchive.gfs" in the master user directory. Defaults to false.

verbose

public static Long verbose

(boolean) Whether to log monitoring information each time a condition check is performed.

Constructor Detail

StatMonitorPrms

public StatMonitorPrms()

Method Detail

getSampleRateMs

public static int getSampleRateMs(TestConfig tc)

getConditions

public static Vector getConditions(TestConfig tc)

archiveStats

public static boolean archiveStats(TestConfig tc)

verbose

public static boolean verbose(TestConfig tc)

main

public static void main(String[] args)