Swap Manager is a non-distributed system designed to save bytes or data temporarily on hard disk. It saves operating memory by storing bytes or data not being used. This manager runs only on server nodes.
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Server |
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Property |
Description |
Default Value |
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FileCount |
Specifies the number of swap files to be used. FileCount is in [1…256]. This value has to be chosen depending on the physical machine configuration. |
3 |
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BlockSize |
The value of this property is a number in [6…12]. The block size in swap files (in bytes) equals to 2
(BlockSize)
(2 to the power of the value of the property). |
9 (512 bytes) |
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FileName |
Specifies the path to the swap file and its name. |
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FileLimit |
Specifies the length of the swap file in bytes. It must be in [10MB.... 3.75GB]. |
200MB |
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FileHandlers |
Specifies the number of handlers to the swap file. It must be in [1...30]. |
4 |
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ErrorLogFileName |
Specifies the filename to which error log messages are written. |
./managers/log
/ERROR.log |
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CriticalLogLevel |
Specifies the types of log messages that have critical priority. It is a number from 0 to 7 specifying that log messages within [CriticalLogLevel,7] are written in the DefaultCriticalFile. |
3 |
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NormalLogFileName |
Specifies the filename to which messages with normal priority are written. This file is used by the Log viewer of the system to display the messages. |
DEFAULT.log |
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InfoLogFileName |
Specifies the filename to which info log messages for Swap Manager are written. |
./managers/log
/swap/INFO.log |
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CriticalLogFileName |
Specifies the filename to which critical log messages are written. |
./managers/log
/CRITICAL.log |
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NormalLogLevel |
Specifies the types of log messages that have normal priority. It is a number from 0 to 7 specifying that log messages within [0,NormalLogLevel] are written in the DefaultNormalFile. |
5 |
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AlertLogFileName |
Specifies the filename to which alert log messages are written. |
./managers/log /ALERT.log |
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EmergencyLogFileName |
Specifies the filename to which emergency log messages are written. |
./managers/log
/EMERGENCY.log |
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DebugLogFileName |
Specifies the filename to which debug log messages for Swap Manager are written. |
./managers/log
/swap/DEBUG.log |
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NoticeLogFileName |
Specifies the filename to which notice log messages for Swap Manager are written. |
./managers/log /swap/NOTICE.log |
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WarningLogFileName |
Specifies the filename to which warning log messages for Swap Manager are written. |
./managers/log
/swap/WARNING.log |
../cluster/server/managers/settings/SwapManager.properties
Swap Manager properties specified in the
Visual Administrator
section can be set from this property file as well.
If the system administrator does not specify Swap Manager properties, a default number of swap files with default properties are created in the working directory. For each added swap file, the system administrator must specify its name, length and the number of file handlers.