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@@ -1,4 +1,4 @@
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+<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>DatabaseEnvironment Properties </title><link rel="stylesheet" type="text/css" href="../styles/presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="BerkeleyDB" /><meta name="file" content="Properties_T_BerkeleyDB_DatabaseEnvironment" /><meta name="guid" content="Properties_T_BerkeleyDB_DatabaseEnvironment" /><xml><MSHelp:Attr Name="AssetID" Value="Properties.T:BerkeleyDB.DatabaseEnvironment" /><MSHelp:TOCTitle Title="DatabaseEnvironment Properties " /><MSHelp:RLTitle Title="DatabaseEnvironment Properties (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="Properties.T:BerkeleyDB.DatabaseEnvironment" /><MSHelp:Keyword Index="A" Term="frlrfBerkeleyDBDatabaseEnvironmentPropertiesTopic" /><MSHelp:Keyword Index="K" Term="DatabaseEnvironment class, properties" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="AssemblyVersion" Value="6.1.23.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; 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<span id="headfeedbackarea" class="feedbackhead">
<a href="javascript:SubmitFeedback('','Berkeley DB .NET API Documentation','','','','%0\dYour%20feedback%20is%20used%20to%20improve%20the%20documentation%20and%20the%20product.%20Your%20e-mail%20address%20will%20not%20be%20used%20for%20any%20other%20purpose%20and%20is%20disposed%20of%20after%20the%20issue%20you%20report%20is%20resolved.%20%20While%20working%20to%20resolve%20the%20issue%20that%20you%20report,%20you%20may%20be%20contacted%20via%20e-mail%20to%20get%20further%20details%20or%20clarification%20on%20the%20feedback%20you%20sent.%20After%20the%20issue%20you%20report%20has%20been%20addressed,%20you%20may%20receive%20an%20e-mail%20to%20let%20you%20know%20that%20your%20feedback%20has%20been%20addressed.%0\A%0\d','Customer%20Feedback');">
@@ -10,7 +10,7 @@
</th><th class="nameColumn">Name</th><th class="descriptionColumn">Description</th></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_AutoCommit.htm">AutoCommit</a></td><td><div class="summary">
If true, database operations for which no explicit transaction
handle was specified, and which modify databases in the database
- environment, will be automatically enclosed within a transaction.
+ environment, are automatically enclosed within a transaction.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_BackupBufferSize.htm">BackupBufferSize</a></td><td><div class="summary">
The size of the buffer, in bytes, to read from the database during a
hot backup.
@@ -46,22 +46,36 @@
For some environments, direct I/O can provide faster write
throughput, but usually it is slower because the OS buffer pool
offers asynchronous activity.
+ </p></div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_BlobDir.htm">BlobDir</a></td><td><div class="summary">
+ The path of the directory where blobs are stored.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_BlobThreshold.htm">BlobThreshold</a></td><td><div class="summary">
+ The size in bytes which is used to determine when a data item
+ is stored as a blob.
+ <p>
+ Any data item that is equal to or larger in size than the
+ threshold value is automatically stored as a blob.
+ </p><p>
+ If the threshold value is 0, databases opened in the environment
+ default to never using blob support.
+ </p><p>
+ It is illegal to enable blob support if replication is enabled for the
+ environment.
</p></div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_CacheSize.htm">CacheSize</a></td><td><div class="summary">
- The size of the shared memory buffer pool -- that is, the cache.
+ The size of the shared memory buffer pool (the cache).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_CDB_ALLDB.htm">CDB_ALLDB</a></td><td><div class="summary">
- If true, Berkeley DB Concurrent Data Store applications will perform
+ If true, Berkeley DB Concurrent Data Store applications perform
locking on an environment-wide basis rather than on a per-database
basis.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_Create.htm">Create</a></td><td><div class="summary">
- If true, Berkeley DB subsystems will create any underlying files, as
+ If true, Berkeley DB subsystems create any underlying files, as
necessary.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_DataDirs.htm">DataDirs</a></td><td><div class="summary">
The array of directories where database files are stored.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_DeadlockResolution.htm">DeadlockResolution</a></td><td><div class="summary">
- The deadlock detector configuration, specifying what lock request(s)
+ The deadlock detector configuration, specifying which lock request(s)
should be rejected. As transactions acquire locks on behalf of a
single locker ID, rejecting a lock request associated with a
- transaction normally requires the transaction be aborted.
+ transaction normally requires the transaction to be aborted.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_EncryptAlgorithm.htm">EncryptAlgorithm</a></td><td><div class="summary">
The algorithm used by the Berkeley DB library to perform encryption
and decryption.
@@ -99,7 +113,7 @@
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_InitMutexes.htm">InitMutexes</a></td><td><div class="summary">
The initial number of mutexes allocated
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_InitRegions.htm">InitRegions</a></td><td><div class="summary">
- If true, Berkeley DB will page-fault shared regions into memory when
+ If true, Berkeley DB page-faults shared regions into memory when
initially creating or joining a Berkeley DB environment.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_InitThreadCount.htm">InitThreadCount</a></td><td><div class="summary">
The number of thread objects allocated when the environment is
@@ -122,29 +136,35 @@
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LockTimeout.htm">LockTimeout</a></td><td><div class="summary">
A value, in microseconds, representing lock timeouts.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogAutoRemove.htm">LogAutoRemove</a></td><td><div class="summary">
- If true, Berkeley DB will automatically remove log files that are no
+ If true, Berkeley DB automatically removes log files that are no
longer needed.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogBlobContent.htm">LogBlobContent</a></td><td><div class="summary">
+ If true, enables full logging of blob data.
+ Required if using HA or the hotbackup utility.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogBufferSize.htm">LogBufferSize</a></td><td><div class="summary">
The size of the in-memory log buffer, in bytes
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogDir.htm">LogDir</a></td><td><div class="summary">
The path of a directory to be used as the location of logging files.
- Log files created by the Log Manager subsystem will be created in
+ Log files created by the Log Manager subsystem are created in
this directory.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogFileMode.htm">LogFileMode</a></td><td><div class="summary">
The absolute file mode for created log files. This property is only
useful for the rare Berkeley DB application that does not control
its umask value.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogForceSync.htm">LogForceSync</a></td><td><div class="summary">
- If true, Berkeley DB will flush log writes to the backing disk
+ If true, Berkeley DB flushes log writes to the backing disk
before returning from the write system call, rather than flushing
log writes explicitly in a separate system call, as necessary.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogInMemory.htm">LogInMemory</a></td><td><div class="summary">
- If true, transaction logs are maintained in memory rather than on
+ If true, transaction logs are maintained in-memory rather than on
disk. This means that transactions exhibit the ACI (atomicity,
consistency, and isolation) properties, but not D (durability).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogNoBuffer.htm">LogNoBuffer</a></td><td><div class="summary">
If true, system buffering is turned off for Berkeley DB log files to
avoid double caching.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogNoSync.htm">LogNoSync</a></td><td><div class="summary">
+ If true, Berkeley DB avoids the fsync() call when the log files are
+ flushed.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_LogRegionSize.htm">LogRegionSize</a></td><td><div class="summary">
The size of the underlying logging area of the Berkeley DB
environment, in bytes.
@@ -169,7 +189,7 @@
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MaxObjects.htm">MaxObjects</a></td><td><div class="summary">
The maximum number of locked objects
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MaxOpenFiles.htm">MaxOpenFiles</a></td><td><div class="summary">
- The number of file descriptors the library will open concurrently
+ The number of file descriptors the library opens concurrently
when flushing dirty pages from the cache.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MaxSequentialWrites.htm">MaxSequentialWrites</a></td><td><div class="summary">
The number of sequential write operations scheduled by the library
@@ -179,12 +199,17 @@
value bounds the size of the memory allocated for transactions.
Child transactions are counted as active until they either commit or
abort.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_messageFeedback.htm">messageFeedback</a></td><td><div class="summary">
+ The mechanism for reporting detailed statistic messages to the
+ application.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MetadataDir.htm">MetadataDir</a></td><td><div class="summary">
The path of directory to store the persistent metadata.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MMapSize.htm">MMapSize</a></td><td><div class="summary">
The maximum file size, in bytes, for a file to be mapped into the
process address space. If no value is specified, it defaults to
10MB.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_Msgfile.htm">Msgfile</a></td><td><div class="summary">
+ The message file.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MutexAlignment.htm">MutexAlignment</a></td><td><div class="summary">
The mutex alignment, in bytes.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_MutexIncrement.htm">MutexIncrement</a></td><td><div class="summary">
@@ -193,15 +218,15 @@
If true, turn off system buffering of Berkeley DB database files to
avoid double caching.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_NoLocking.htm">NoLocking</a></td><td><div class="summary">
- If true, Berkeley DB will grant all requested mutual exclusion
+ If true, Berkeley DB grants all requested mutual exclusion
mutexes and database locks without regard for their actual
availability. This functionality should never be used for purposes
other than debugging.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_NoMMap.htm">NoMMap</a></td><td><div class="summary">
- If true, Berkeley DB will copy read-only database files into the
+ If true, Berkeley DB copies read-only database files into the
local cache instead of potentially mapping them into process memory.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_NoPanic.htm">NoPanic</a></td><td><div class="summary">
- If true, Berkeley DB will ignore any panic state in the database
+ If true, Berkeley DB ignores any panic state in the database
environment. (Database environments in a panic state normally refuse
all attempts to call Berkeley DB functions, throwing
<a href="T_BerkeleyDB_RunRecoveryException.htm">RunRecoveryException</a>.) This functionality should never
@@ -227,7 +252,7 @@
region. These are the structures other than mutexes and the page
cache (memory pool).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_Register.htm">Register</a></td><td><div class="summary">
- If true, Berkeley DB will have checked to see if recovery needed to
+ If true, Berkeley DB checks if recovery is needed to
be performed before opening the database environment.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepAckTimeout.htm">RepAckTimeout</a></td><td><div class="summary">
The amount of time the replication manager's transport function
@@ -235,13 +260,13 @@
clients, before giving up and returning a failure indication. The
default wait time is 1 second.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepAutoInit.htm">RepAutoInit</a></td><td><div class="summary">
- If true, the replication master will automatically re-initialize
+ If true, the replication master automatically re-initializes
outdated clients (defaults to true).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepBulkTransfer.htm">RepBulkTransfer</a></td><td><div class="summary">
If true, the replication master sends groups of records to the
clients in a single network transfer
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepCheckpointDelay.htm">RepCheckpointDelay</a></td><td><div class="summary">
- The amount of time a master site will delay between completing a
+ The amount of time a master site delays between completing a
checkpoint and writing a checkpoint record into the log.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepClockskewFast.htm">RepClockskewFast</a></td><td><div class="summary">
The value, relative to <a href="P_BerkeleyDB_DatabaseEnvironment_RepClockskewSlow.htm">RepClockskewSlow</a>, of the
@@ -249,15 +274,15 @@
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepClockskewSlow.htm">RepClockskewSlow</a></td><td><div class="summary">
The value of the slowest clock in the group of sites.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepConnectionRetry.htm">RepConnectionRetry</a></td><td><div class="summary">
- The amount of time the replication manager will wait before trying
+ The amount of time the replication manager waits before trying
to re-establish a connection to another site after a communication
failure. The default wait time is 30 seconds.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepDelayClientSync.htm">RepDelayClientSync</a></td><td><div class="summary">
If true, the client should delay synchronizing to a newly declared
- master (defaults to false). Clients configured in this way will remain
+ master (defaults to false). Clients configured in this way remain
unsynchronized until the application calls <a href="M_BerkeleyDB_DatabaseEnvironment_RepSync.htm">RepSync<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepElectionRetry.htm">RepElectionRetry</a></td><td><div class="summary">
- Configure the amount of time the replication manager will wait
+ Configure the amount of time the replication manager waits
before retrying a failed election. The default wait time is 10
seconds.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepElectionTimeout.htm">RepElectionTimeout</a></td><td><div class="summary">
@@ -278,7 +303,7 @@
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepHeartbeatSend.htm">RepHeartbeatSend</a></td><td><div class="summary">
The frequency at which the replication manager, running at a master
site, broadcasts a heartbeat message in an otherwise idle system.
- When 0 (the default), no heartbeat messages will be sent.
+ When 0 (the default), no heartbeat messages are sent.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepInMemory.htm">RepInMemory</a></td><td><div class="summary">
If true, replication only stores the internal information in-memory
and cannot keep persistent state across a site crash or reboot. By
@@ -290,6 +315,9 @@
the same lease timeout value. There is no default value. If leases
are desired, this method must be called prior to calling
<a href="M_BerkeleyDB_DatabaseEnvironment_RepStartClient.htm">RepStartClient<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a> or <a href="M_BerkeleyDB_DatabaseEnvironment_RepStartMaster.htm">RepStartMaster<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_ReplicationView.htm">ReplicationView</a></td><td><div class="summary">
+ The function used to create a replication view that determines
+ whether a database file is replicated to the local site.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepMessageDispatch.htm">RepMessageDispatch</a></td><td><div class="summary">
Set the message dispatch function. It is responsible for receiving
messages sent from remote sites using either
@@ -300,10 +328,16 @@
then this function must send a response using
<a href="M_BerkeleyDB_DbChannel_SendMessage.htm">SendMessage(<span class="languageSpecificText"><span class="cpp">array&lt;</span></span>DatabaseEntry<span class="languageSpecificText"><span class="cpp">&gt;</span><span class="cs">[]</span><span class="vb">()</span><span class="nu">[]</span></span>)</a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepMgrAckPolicy.htm">RepMgrAckPolicy</a></td><td><div class="summary">
- Specify how master and client sites will handle acknowledgment of
+ Specify how master and client sites handle acknowledgment of
replication messages which are necessary for "permanent" records.
The current implementation requires all sites in a replication group
configure the same acknowledgement policy.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepmgrIncomingQueueMaxBytes.htm">RepmgrIncomingQueueMaxBytes</a></td><td><div class="summary">
+ The bytes component of the maximum amount of dynamic memory
+ used by the Replication Manager incoming queue.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepmgrIncomingQueueMaxGBytes.htm">RepmgrIncomingQueueMaxGBytes</a></td><td><div class="summary">
+ The gigabytes component of the maximum amount of dynamic memory
+ used by the Replication Manager incoming queue.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepMgrLocalSite.htm">RepMgrLocalSite</a></td><td><div class="summary">
The local site of the replication manager. Returns null if the
local site has not been configured.
@@ -311,14 +345,28 @@
The status of the sites currently known by the replication manager.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepMgrRunElections.htm">RepMgrRunElections</a></td><td><div class="summary">
If true, Replication Manager automatically runs elections to
- choose a new master when the old master appears to
- have become disconnected (defaults to true).
+ choose a new master when the old master disconnects (defaults to true).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepNoBlocking.htm">RepNoBlocking</a></td><td><div class="summary">
- If true, Berkeley DB method calls that would normally block while
- clients are in recovery will return errors immediately (defaults to
- false).
+ If true, errors are returned immediately for Berkeley DB method calls
+ that would normally block while clients are in recovery
+ (defaults to false).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepNSites.htm">RepNSites</a></td><td><div class="summary">
The total number of sites in the replication group.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepPrefmasClient.htm">RepPrefmasClient</a></td><td><div class="summary">
+ This flag is used to specify the client site in a replication group
+ operating in preferred master mode. A preferred master replication
+ group must contain only two sites, with one site specified as the
+ preferred master site and the other site specified as the client
+ site. The client site in a preferred master replication group takes
+ over temporarily as master when the preferred master site is
+ unavailable.
+ </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepPrefmasMaster.htm">RepPrefmasMaster</a></td><td><div class="summary">
+ This flag is used to specify the preferred master site in a
+ replication group operating in preferred master mode. A preferred
+ master replication group must contain only two sites, with one site
+ specified as the preferred master site and the other site specified
+ as the client site. The preferred master site operates as the
+ master site whenever possible.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepPriority.htm">RepPriority</a></td><td><div class="summary">
The database environment's priority in replication group elections.
A special value of 0 indicates that this environment cannot be a
@@ -332,25 +380,25 @@
retransmission.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepStrict2Site.htm">RepStrict2Site</a></td><td><div class="summary">
Replication Manager observes the strict "majority" rule in managing
- elections, even in a group with only 2 sites. This means the client
- in a 2-site group will be unable to take over as master if the
+ elections, even in a group with only 2 sites. The client
+ in a 2-site group is unable to take over as master if the
original master fails or becomes disconnected. (See the Elections
section in the Berkeley DB Reference Guide for more information.)
Both sites in the replication group should have the same value for
this parameter.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepTransmitLimitBytes.htm">RepTransmitLimitBytes</a></td><td><div class="summary">
The bytes component of the byte-count limit on the amount of data
- that will be transmitted from a site in response to a single
+ that is transmitted from a site in response to a single
message processed by <a href="M_BerkeleyDB_DatabaseEnvironment_RepProcessMessage.htm">RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32)</a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepTransmitLimitGBytes.htm">RepTransmitLimitGBytes</a></td><td><div class="summary">
The gigabytes component of the byte-count limit on the amount of
- data that will be transmitted from a site in response to a single
+ data that is transmitted from a site in response to a single
message processed by <a href="M_BerkeleyDB_DatabaseEnvironment_RepProcessMessage.htm">RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32)</a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepTransport.htm">RepTransport</a></td><td><div class="summary">
The delegate used to transmit data using the replication
application's communication infrastructure.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RepUseMasterLeases.htm">RepUseMasterLeases</a></td><td><div class="summary">
- If true, master leases will be used for this site (defaults to
+ If true, master leases are used for this site (defaults to
false).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_RunFatalRecovery.htm">RunFatalRecovery</a></td><td><div class="summary">
If true, catastrophic recovery was run on this environment before
@@ -359,7 +407,7 @@
If true, normal recovery was run on this environment before opening
it for normal use.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_SequentialWritePause.htm">SequentialWritePause</a></td><td><div class="summary">
- The number of microseconds the thread of control will pause before
+ The number of microseconds the thread of control pauses before
scheduling further write operations.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_SetThreadID.htm">SetThreadID</a></td><td><div class="summary">
A delegate that returns a unique identifier pair for the current
@@ -370,7 +418,7 @@
If true, allocate region memory from system shared memory instead of
from heap memory or memory backed by the filesystem.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TempDir.htm">TempDir</a></td><td><div class="summary">
- The path of a directory to be used as the location of temporary
+ The path of a directory to be used as the location for temporary
files.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_ThreadCount.htm">ThreadCount</a></td><td><div class="summary">
An approximate number of threads in the database environment.
@@ -379,10 +427,10 @@
or a process) is still running.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TimeNotGranted.htm">TimeNotGranted</a></td><td><div class="summary">
If true, database calls timing out based on lock or transaction
- timeout values will throw <a href="T_BerkeleyDB_LockNotGrantedException.htm">LockNotGrantedException</a>
+ timeout values throw <a href="T_BerkeleyDB_LockNotGrantedException.htm">LockNotGrantedException</a>
instead of <a href="T_BerkeleyDB_DeadlockException.htm">DeadlockException</a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnNoSync.htm">TxnNoSync</a></td><td><div class="summary">
- If true, Berkeley DB will not write or synchronously flush the log
+ If true, Berkeley DB does not write or synchronously flush the log
on transaction commit.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnNoWait.htm">TxnNoWait</a></td><td><div class="summary">
If true and a lock is unavailable for any Berkeley DB operation
@@ -391,24 +439,24 @@
<a href="T_BerkeleyDB_LockNotGrantedException.htm">LockNotGrantedException</a> if configured with
<a href="P_BerkeleyDB_DatabaseEnvironment_TimeNotGranted.htm">TimeNotGranted</a>).
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnSnapshot.htm">TxnSnapshot</a></td><td><div class="summary">
- If true, all transactions in the environment will be started as if
+ If true, all transactions in the environment are started as if
<a href="F_BerkeleyDB_TransactionConfig_Snapshot.htm">Snapshot</a> was passed to
<a href="M_BerkeleyDB_DatabaseEnvironment_BeginTransaction.htm">BeginTransaction<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>, and all non-transactional cursors
- will be opened as if <a href="F_BerkeleyDB_CursorConfig_SnapshotIsolation.htm">SnapshotIsolation</a>
+ are opened as if <a href="F_BerkeleyDB_CursorConfig_SnapshotIsolation.htm">SnapshotIsolation</a>
was passed to <a href="M_BerkeleyDB_BaseDatabase_Cursor.htm">Cursor<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnTimeout.htm">TxnTimeout</a></td><td><div class="summary">
A value, in microseconds, representing transaction timeouts.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnTimestamp.htm">TxnTimestamp</a></td><td><div class="summary">
The recovery timestamp
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_TxnWriteNoSync.htm">TxnWriteNoSync</a></td><td><div class="summary">
- If true, Berkeley DB will write, but will not synchronously flush,
+ If true, Berkeley DB writes, but does not synchronously flush,
the log on transaction commit.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_UseEnvironmentVars.htm">UseEnvironmentVars</a></td><td><div class="summary">
The Berkeley DB process' environment may be permitted to specify
information to be used when naming files; see Berkeley DB File
Naming in the Programmer's Reference Guide for more information.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_UseMVCC.htm">UseMVCC</a></td><td><div class="summary">
- If true, all databases in the environment will be opened as if
+ If true, all databases in the environment are opened as if
<a href="F_BerkeleyDB_DatabaseConfig_UseMVCC.htm">UseMVCC</a> was set.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_UsingCDB.htm">UsingCDB</a></td><td><div class="summary">
If true, locking for the Berkeley DB Concurrent Data Store product
@@ -427,7 +475,7 @@
Specific additional informational and debugging messages in the
Berkeley DB message output.
</div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" title="Public property" /></td><td><a href="P_BerkeleyDB_DatabaseEnvironment_YieldCPU.htm">YieldCPU</a></td><td><div class="summary">
- If true, Berkeley DB will yield the processor immediately after each
+ If true, Berkeley DB yields the processor immediately after each
page or mutex acquisition.
</div></td></tr></table></div><h1 class="heading"><span onclick="ExpandCollapse(seeAlsoToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(seeAlsoToggle, event)" tabindex="0"><img id="seeAlsoToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />See Also</span></h1><div id="seeAlsoSection" class="section" name="collapseableSection" style=""><div class="seeAlsoStyle"><a href="T_BerkeleyDB_DatabaseEnvironment.htm">DatabaseEnvironment Class</a></div><div class="seeAlsoStyle"><a href="N_BerkeleyDB.htm">BerkeleyDB Namespace</a></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"> </span>
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