Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Operations Manager i10.62

Administer > Additional Configuration > High Availability > Fine-Tuning High Availability Settings

Fine-Tuning High Availability Settings

The previous sections describe high availability (HA) for OMi. We recommend that you follow the guidelines described there as the best practice for working with OMi. However, if you must shorten the duration of the failover process, you can fine-tune OMi high availability settings.

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Tasks

How to Modify HAC Parameters

When setting HAC parameters, always follow the following rule:

Monitor Failures Interval <= Normal Keep Alive Period <= Critical Keep Alive Period <= Keep Alive Timeout.

Modify the parameter values according to the following guidelines:

Set the Failover Stabilization Time close to the data processing server start time in your environment.
The lowest value should be assigned to the Monitor Failures Interval (default = 1 minute), all other values should be greater than this.
The Keep Alive Timeout (default = 5 minutes) should be assigned the highest value among all the parameters.
All other parameters should be assigned a value equal to or less than the Keep Alive Timeout; these other parameters are for internal management of the processes when they are failing, so all cleanup tasks must be finished within this time and before failover starts (after expiry of Keep Alive Timeout).
Assigning a very low value to Critical Keep Alive Period (default = 4 minutes) and Failover Stabilization Time (default = 10 minutes) can cause the same service to be active on both servers, or multiple failovers during DPS startup and switchover time.
When Keep Alive Timeout is set to less than the startup time of the data processing server, restarting the primary server can cause activation of the backup server. To prevent this, stop the backup server before restarting the primary, and start the backup only after the primary is up again.

Note Although there is a logical relationship between the HAC parameters, and their values should follow a logical order, this is not enforced by OMi. OMi enables you to set any value (within the range of 1 – 1440 minutes) for the time-related parameters, and does not validate the values for inter-dependency. For example, you can set the Monitors Failures Interval value higher than the Keep Alive Timeout even though this is logically incorrect.

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