org.apache.ignite.configuration

Class MemoryConfiguration

java.lang.Object

org.apache.ignite.configuration.MemoryConfiguration

All Implemented Interfaces:

Serializable

Deprecated.

Use DataStorageConfiguration instead.

@Deprecated
public class MemoryConfiguration
extends Object
implements Serializable

A page memory configuration for an Apache Ignite node. The page memory is a manageable off-heap based memory architecture that divides all expandable memory regions into pages of fixed size (see getPageSize(). An individual page can store one or many cache key-value entries that allows reusing the memory in the most efficient way and avoid memory fragmentation issues.

By default, the page memory allocates a single expandable memory region using settings of createDefaultPolicyConfig(). All the caches that will be configured in an application will be mapped to this memory region by default, thus, all the cache data will reside in that memory region.

If initial size of the default memory region doesn't satisfy requirements or it's required to have multiple memory regions with different properties then MemoryPolicyConfiguration can be used for both scenarios. For instance, using memory policies you can define memory regions of different maximum size, eviction policies, swapping options, etc. Once you define a new memory region you can bind particular Ignite caches to it.

To learn more about memory policies refer to MemoryPolicyConfiguration documentation.

Sample configuration below shows how to make 5 GB memory regions the default one for Apache Ignite:

     
     <property name="memoryConfiguration">
         <bean class="org.apache.ignite.configuration.MemoryConfiguration">
             <property name="systemCacheInitialSize" value="#{100L * 1024 * 1024}"/>
             <property name="defaultMemoryPolicyName" value="default_mem_plc"/>

             <property name="memoryPolicies">
                 <list>
                     <bean class="org.apache.ignite.configuration.MemoryPolicyConfiguration">
                         <property name="name" value="default_mem_plc"/>
                         <property name="initialSize" value="#{5L * 1024 * 1024 * 1024}"/>
                     </bean>
                 </list>
             </property>
         </bean>
     </property>
     
 

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	DFLT_MEM_PLC_DEFAULT_NAME Deprecated. This name is assigned to default DataRegion if no user-defined default MemPlc is specified
static long	DFLT_MEMORY_POLICY_INITIAL_SIZE Deprecated. Default memory policy start size (256 MB).
static long	DFLT_MEMORY_POLICY_MAX_SIZE Deprecated. Default memory policy's size is 20% of physical memory available on current machine.
static int	DFLT_PAGE_SIZE Deprecated. Default memory page size.

Constructor Summary

Constructors

Constructor and Description
MemoryConfiguration() Deprecated.

Method Summary

Modifier and Type	Method and Description
MemoryPolicyConfiguration	createDefaultPolicyConfig() Deprecated. Creates a configuration for the default memory policy that will instantiate the default memory region.
int	getConcurrencyLevel() Deprecated. Returns the number of concurrent segments in Ignite internal page mapping tables.
String	getDefaultMemoryPolicyName() Deprecated. Gets a name of default memory policy.
long	getDefaultMemoryPolicySize() Deprecated. Gets a size for default memory policy overridden by user.
MemoryPolicyConfiguration[]	getMemoryPolicies() Deprecated. Gets an array of all memory policies configured.
int	getPageSize() Deprecated. The pages memory consists of one or more expandable memory regions defined by MemoryPolicyConfiguration.
long	getSystemCacheInitialSize() Deprecated. Initial size of a memory region reserved for system cache.
long	getSystemCacheMaxSize() Deprecated. Maximum memory region size reserved for system cache.
MemoryConfiguration	setConcurrencyLevel(int concLvl) Deprecated. Sets the number of concurrent segments in Ignite internal page mapping tables.
MemoryConfiguration	setDefaultMemoryPolicyName(String dfltMemPlcName) Deprecated. Sets the name for the default memory policy that will initialize the default memory region.
MemoryConfiguration	setDefaultMemoryPolicySize(long dfltMemPlcSize) Deprecated. Overrides size of default memory policy which is created automatically.
MemoryConfiguration	setMemoryPolicies(MemoryPolicyConfiguration... memPlcs) Deprecated. Sets memory policies configurations.
MemoryConfiguration	setPageSize(int pageSize) Deprecated. Changes the page size.
MemoryConfiguration	setSystemCacheInitialSize(long sysCacheInitSize) Deprecated. Sets initial size of a memory region reserved for system cache.
MemoryConfiguration	setSystemCacheMaxSize(long sysCacheMaxSize) Deprecated. Sets maximum memory region size reserved for system cache.
String	toString() Deprecated.

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_MEMORY_POLICY_INITIAL_SIZE

public static final long DFLT_MEMORY_POLICY_INITIAL_SIZE

Deprecated.

Default memory policy start size (256 MB).

See Also:

Constant Field Values

DFLT_MEMORY_POLICY_MAX_SIZE

public static final long DFLT_MEMORY_POLICY_MAX_SIZE

Deprecated.

Default memory policy's size is 20% of physical memory available on current machine.

DFLT_PAGE_SIZE

public static final int DFLT_PAGE_SIZE

Deprecated.

Default memory page size.

See Also:

Constant Field Values

DFLT_MEM_PLC_DEFAULT_NAME

public static final String DFLT_MEM_PLC_DEFAULT_NAME

Deprecated.

This name is assigned to default DataRegion if no user-defined default MemPlc is specified

See Also:

Constant Field Values

Constructor Detail

MemoryConfiguration

public MemoryConfiguration()

Deprecated.

Method Detail

getSystemCacheInitialSize

public long getSystemCacheInitialSize()

Deprecated.

Initial size of a memory region reserved for system cache.

Returns:

Size in bytes.

setSystemCacheInitialSize

public MemoryConfiguration setSystemCacheInitialSize(long sysCacheInitSize)

Deprecated.

Sets initial size of a memory region reserved for system cache. Default value is DFLT_SYS_CACHE_INIT_SIZE

Parameters:

sysCacheInitSize - Size in bytes.

Returns:

this for chaining.

getSystemCacheMaxSize

public long getSystemCacheMaxSize()

Deprecated.

Maximum memory region size reserved for system cache.

Returns:

Size in bytes.

setSystemCacheMaxSize

public MemoryConfiguration setSystemCacheMaxSize(long sysCacheMaxSize)

Deprecated.

Sets maximum memory region size reserved for system cache. The total size should not be less than 10 MB due to internal data structures overhead.

Parameters:

sysCacheMaxSize - Maximum size in bytes for system cache memory region.

Returns:

this for chaining.

getPageSize

public int getPageSize()

Deprecated.

The pages memory consists of one or more expandable memory regions defined by MemoryPolicyConfiguration. Every memory region is split on pages of fixed size that store actual cache entries.

Returns:

Page size in bytes.

setPageSize

public MemoryConfiguration setPageSize(int pageSize)

Deprecated.

Changes the page size. Default value is DFLT_PAGE_SIZE

Parameters:

pageSize - Page size in bytes.

Returns:

this for chaining.

getMemoryPolicies

public MemoryPolicyConfiguration[] getMemoryPolicies()

Deprecated.

Gets an array of all memory policies configured. Apache Ignite will instantiate a dedicated memory region per policy. An Apache Ignite cache can be mapped to a specific policy with CacheConfiguration.setMemoryPolicyName(String) method.

Returns:

Array of configured memory policies.

setMemoryPolicies

public MemoryConfiguration setMemoryPolicies(MemoryPolicyConfiguration... memPlcs)

Deprecated.

Sets memory policies configurations.

Parameters:

memPlcs - Memory policies configurations.

Returns:

this for chaining.

createDefaultPolicyConfig

public MemoryPolicyConfiguration createDefaultPolicyConfig()

Deprecated.

Creates a configuration for the default memory policy that will instantiate the default memory region. To override settings of the default memory policy in order to create the default memory region with different parameters, create own memory policy first, pass it to setMemoryPolicies(MemoryPolicyConfiguration...) method and change the name of the default memory policy with setDefaultMemoryPolicyName(String).

Returns:

default Memory policy configuration.

getConcurrencyLevel

public int getConcurrencyLevel()

Deprecated.

Returns the number of concurrent segments in Ignite internal page mapping tables. By default equals to the number of available CPUs multiplied by 4.

Returns:

Mapping table concurrency level.

setConcurrencyLevel

public MemoryConfiguration setConcurrencyLevel(int concLvl)

Deprecated.

Sets the number of concurrent segments in Ignite internal page mapping tables.

Parameters:

concLvl - Mapping table concurrency level.

Returns:

this for chaining.

getDefaultMemoryPolicySize

public long getDefaultMemoryPolicySize()

Deprecated.

Gets a size for default memory policy overridden by user.

Returns:

Default memory policy size overridden by user or DFLT_MEMORY_POLICY_MAX_SIZE if nothing was specified.

setDefaultMemoryPolicySize

public MemoryConfiguration setDefaultMemoryPolicySize(long dfltMemPlcSize)

Deprecated.

Overrides size of default memory policy which is created automatically. If user doesn't specify any memory policy configuration, a default one with default size (20% of available RAM) is created by Ignite. This property allows user to specify desired size of default memory policy without having to use more verbose syntax of MemoryPolicyConfiguration elements.

Parameters:

dfltMemPlcSize - Size of default memory policy overridden by user.

Returns:

this for chaining.

getDefaultMemoryPolicyName

public String getDefaultMemoryPolicyName()

Deprecated.

Gets a name of default memory policy.

Returns:

A name of a custom memory policy configured with MemoryConfiguration or null of the default policy is used.

setDefaultMemoryPolicyName

public MemoryConfiguration setDefaultMemoryPolicyName(String dfltMemPlcName)

Deprecated.

Sets the name for the default memory policy that will initialize the default memory region. To set own default memory policy, create the policy first, pass it to setMemoryPolicies(MemoryPolicyConfiguration...) method and change the name of the default memory policy with MemoryConfiguration#setDefaultMemoryPolicyName(String). If nothing is specified by user, it is set to DFLT_MEM_PLC_DEFAULT_NAME value.

Parameters:

dfltMemPlcName - Name of a memory policy to be used as default one.

Returns:

this for chaining.

toString

public String toString()

Deprecated.

Overrides:

toString in class Object