DefaultFileStoreMBean


Overview  |   Related MBeans  |   Attributes  |   Operations

Overview

This MBean describes the configuration of the default file store. Each WebLogic Server instance has a default file store.

   
Fully Qualified Interface NameIf you use the getMBeanInfo operation in MBeanTypeServiceMBean, supply the following value as this MBean's fully qualified interface name:
weblogic.management.configuration.DefaultFileStoreMBean
Factory Methods No factory methods. Instances of this MBean are created automatically.
Access Points You can access this MBean from the following MBean attributes:


    Attributes

    This section describes the following attributes:


    BlockSize

    The smallest addressable block, in bytes, of a file. When a native wlfileio driver is available and the block size has not been configured by the user, the store selects the minimum OS specific value for unbuffered (direct) I/O, if it is within the range [512, 8192].

    A file store's block size does not change once the file store creates its files. Changes to block size only take effect for new file stores or after the current files have been deleted. See "Tuning the Persistent Store" in Tuning Performance of Oracle WebLogic Server.

           
    Privileges Read/Write
    Typeint
    Default Value-1
    Minimum value-1
    Maximum value8192

    CacheDirectory

    The location of the cache directory for Direct-Write-With-Cache, ignored for other policies.

    When Direct-Write-With-Cache is specified as the SynchronousWritePolicy, cache files are created in addition to primary files (see Directory for the location of primary files). If a cache directory location is specified, the cache file path is CacheDirectory/WLStoreCache/StoreNameFileNum.DAT.cache. When specified, Oracle recommends using absolute paths, but if the directory location is a relative path, then CacheDirectory is created relative to the WebLogic Server instance's home directory. If "" or Null is specified, the Cache Directory is located in the current operating system temp directory as determined by the java.io.tmpdir Java System property (JDK's default: /tmp on UNIX, %TEMP% on Windows) and is TempDirectory/WLStoreCache/DomainName/unique-id/ StoreNameFileNum.DAT.cache. The value of java.io.tmpdir varies between operating systems and configurations, and can be overridden by passing -Djava.io.tmpdir=My_path on the JVM command line.

    Considerations:

           
    Privileges Read/Write
    Typejava.lang.String

    CachingDisabled

    Private property that disables caching in proxies.

           
    Privileges Read only
    Typeboolean
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    Directory

    The path name to the file system directory where the file store maintains its data files.

           
    Privileges Read/Write
    Typejava.lang.String

    DynamicallyCreated

    Return whether the MBean was created dynamically or is persisted to config.xml

           
    Privileges Read only
    Typeboolean
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    FileLockingEnabled

    Determines whether OS file locking is used.

    When file locking protection is enabled, a store boot fails if another store instance already has opened the store files. Do not disable this setting unless you have procedures in place to prevent multiple store instances from opening the same file. File locking is not required but helps prevent corruption in the event that two same-named file store instances attempt to operate in the same directories. This setting applies to both primary and cache files.

    For more information, see:

           
    Privileges Read/Write
    Typeboolean
    Default Valuetrue

    Id

    Return the unique id of this MBean instance

           
    Privileges Read only
    Typelong
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    InitialSize

    The initial file size, in bytes.

           
    Privileges Read/Write
    Typelong
    Default Value0
    Minimum value0

    IoBufferSize

    The I/O buffer size, in bytes, automatically rounded down to the nearest power of 2.

    See AllocatedIOBufferBytes to find out the actual allocated off-heap (native) memory amount. It is a multiple of IOBufferSize for the Direct-Write and Cache-Flush policies, or zero.

           
    Privileges Read/Write
    Typeint
    Default Value-1
    Minimum value-1
    Maximum value67108864

    MaxFileSize

    The maximum file size, in bytes, of an individual data file.

           
    Privileges Read/Write
    Typelong
    Default Value1342177280
    Minimum value1048576
    Maximum value2139095040

    MaxWindowBufferSize

    The maximum amount of data, in bytes and rounded down to the nearest power of 2, mapped into the JVM's address space per primary store file. Applies to synchronous write policies Direct-Write-With-Cache and Disabled but only when the native wlfileio library is loaded.

    A window buffer does not consume Java heap memory, but does consume off-heap (native) memory. If the store is unable to allocate the requested buffer size, it allocates smaller and smaller buffers until it reaches MinWindowBufferSize, and then fails if cannot honor MinWindowBufferSize.

    Oracle recommends setting the max window buffer size to more than double the size of the largest write (multiple concurrently updated records may be combined into a single write), and greater than or equal to the file size, unless there are other constraints. 32-bit JVMs may impose a total limit of between 2 and 4GB for combined Java heap plus off-heap (native) memory usage.

           
    Privileges Read/Write
    Typeint
    Default Value-1
    Minimum value-1
    Maximum value1073741824

    MBeanInfo

    Returns the MBean info for this MBean.

    Deprecated.

           
    Privileges Read only
    Typejavax.management.MBeanInfo
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    MinWindowBufferSize

    The minimum amount of data, in bytes and rounded down to the nearest power of 2, mapped into the JVM's address space per primary store file. Applies to synchronous write policies Direct-Write-With-Cache and Disabled, but only when a native wlfileio library is loaded. See Maximum Window Buffer Size.

           
    Privileges Read/Write
    Typeint
    Default Value-1
    Minimum value-1
    Maximum value1073741824

    Name

    The user-specified name of this MBean instance.

    This name is included as one of the key properties in the MBean's javax.management.ObjectName:

    Name=user-specified-name

           
    Privileges Read/Write
    Typejava.lang.String

    Notes

    Optional information that you can include to describe this configuration.

    WebLogic Server saves this note in the domain's configuration file (config.xml) as XML PCDATA. All left angle brackets (<) are converted to the XML entity &lt;. Carriage returns/line feeds are preserved.

    Note: If you create or edit a note from the Administration Console, the Administration Console does not preserve carriage returns/line feeds.

               
    Privileges Read/Write
    Security rolesWrite access is granted only to the following roles:
    • Deployer
    • Operator
    Typejava.lang.String

    ObjectName

    Returns the ObjectName under which this MBean is registered in the MBean server.

    Deprecated.

           
    Privileges Read only
    Typeweblogic.management.WebLogicObjectName
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    Parent

    Return the immediate parent for this MBean

           
    Privileges Read/Write
    Type

    Registered

    Returns false if the MBean represented by this object has been unregistered.

    Deprecated.

           
    Privileges Read only
    Typeboolean
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.

    SynchronousWritePolicy

    The disk write policy that determines how the file store writes data to disk.

    This policy also affects the JMS file store's performance, scalability, and reliability. Oracle recommends Direct-Write-With-Cache which tends to have the highest performance. The default value is Direct-Write. The valid policy options are:

    Notes:

           
    Privileges Read/Write
    Typejava.lang.String
    Default ValueDirect-Write
    Legal Values
    • Disabled
    • Cache-Flush
    • Direct-Write
    • Direct-Write-With-Cache

    Tags

    Return all tags on this Configuration MBean

           
    Available Since Release 12.2.1.0.0
    Privileges Read/Write
    Typeclass java.lang.String[]

    Type

    Returns the type of the MBean.

           
    Privileges Read only
    Typejava.lang.String
    Redeploy or Restart required Changes take effect after you redeploy the module or restart the server.


    Operations

    This section describes the following operations:


    addTag

    Add a tag to this Configuration MBean. Adds a tag to the current set of tags on the Configuration MBean. Tags may contain white spaces.

       
    Operation Name"addTag"
    ParametersObject [] {  tag }

    where:

    • tag is an object of type java.lang.String that specifies:

      tag to be added to the MBean

    SignatureString [] { "java.lang.String" }
    Returns boolean
    Exceptions
    • java.lang.IllegalArgumentException
      IllegalArgumentException if the tag contains illegal punctuation

    freezeCurrentValue

    If the specified attribute has not been set explicitly, and if the attribute has a default value, this operation forces the MBean to persist the default value.

    Unless you use this operation, the default value is not saved and is subject to change if you update to a newer release of WebLogic Server. Invoking this operation isolates this MBean from the effects of such changes.

    Note: To insure that you are freezing the default value, invoke the restoreDefaultValue operation before you invoke this.

    This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute for which some other value has been set.

    Deprecated. 9.0.0.0

       
    Operation Name"freezeCurrentValue"
    ParametersObject [] {  attributeName }

    where:

    • attributeName is an object of type java.lang.String that specifies:

      attributeName

    SignatureString [] { "java.lang.String" }
    Returns void
    Exceptions
    • javax.management.AttributeNotFoundException
    • javax.management.MBeanException

    getInheritedProperties

    Return all properties' names whose value is inherited from template mbean. this is a convenient method to get inheritance info on multiple properties in one jmx call.

       
    Operation Name"getInheritedProperties"
    ParametersObject [] {  propertyNames }

    where:

    • propertyNames is an object of type [Ljava.lang.String; that specifies:

      properties to check

    SignatureString [] { "[Ljava.lang.String;" }
    Returns class

    isInherited

    Check if the value of a property is inherited from template mbean or not.

       
    Operation Name"isInherited"
    ParametersObject [] {  propertyName }

    where:

    • propertyName is an object of type java.lang.String that specifies:

      the name of the property

    SignatureString [] { "java.lang.String" }
    Returns boolean

    isSet

    Returns true if the specified attribute has been set explicitly in this MBean instance.

       
    Operation Name"isSet"
    ParametersObject [] {  propertyName }

    where:

    • propertyName is an object of type java.lang.String that specifies:

      property to check

    SignatureString [] { "java.lang.String" }
    Returns boolean

    removeTag

    Remove a tag from this Configuration MBean

       
    Operation Name"removeTag"
    ParametersObject [] {  tag }

    where:

    • tag is an object of type java.lang.String that specifies:

      tag to be removed from the MBean

    SignatureString [] { "java.lang.String" }
    Returns boolean
    Exceptions
    • java.lang.IllegalArgumentException
      IllegalArgumentException if the tag contains illegal punctuation

    restoreDefaultValue

    If the specified attribute has a default value, this operation removes any value that has been set explicitly and causes the attribute to use the default value.

    Default values are subject to change if you update to a newer release of WebLogic Server. To prevent the value from changing if you update to a newer release, invoke the freezeCurrentValue operation.

    This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute that is already using the default.

    Deprecated. 9.0.0.0

       
    Operation Name"restoreDefaultValue"
    ParametersObject [] {  attributeName }

    where:

    • attributeName is an object of type java.lang.String that specifies:

      attributeName

    SignatureString [] { "java.lang.String" }
    Returns void
    Exceptions
    • javax.management.AttributeNotFoundException

    unSet

    Restore the given property to its default value.

       
    Operation Name"unSet"
    ParametersObject [] {  propertyName }

    where:

    • propertyName is an object of type java.lang.String that specifies:

      property to restore

    SignatureString [] { "java.lang.String" }
    Returns void