The ReplicationConfig type exposes the following members.
Constructors
Name | Description | |
---|---|---|
![]() | ReplicationConfig |
Instantiate a new ReplicationConfig object with default
configuration values.
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Methods
Name | Description | |
---|---|---|
![]() | Clockskew |
Set the clock skew ratio among replication group members based on
the fastest and slowest measurements among the group for use with
master leases.
|
![]() | Equals | (Inherited from Object.) |
![]() | GetHashCode |
Serves as a hash function for a particular type.
(Inherited from Object.) |
![]() | GetType |
Gets the Type of the current instance.
(Inherited from Object.) |
![]() | RepmgrIncomingQueueMax |
Set a byte-count limit on the maximum amount of dynamic memory
used by the Replication Manager incoming queue.
|
![]() | RetransmissionRequest |
Set a threshold for the minimum and maximum time that a client waits
before requesting retransmission of a missing message.
|
![]() | ToString | (Inherited from Object.) |
![]() | TransmitLimit |
Set a byte-count limit on the amount of data that is
transmitted from a site in response to a single message processed by
RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32). The limit is
not a hard limit, and the record that exceeds the limit is the last
record to be sent.
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Fields
Name | Description | |
---|---|---|
![]() | AutoInit |
If true, the replication master automatically re-initializes
outdated clients (defaults to true).
|
![]() | BulkTransfer |
If true, the replication master sends groups of records to the
clients in a single network transfer
|
![]() | DelayClientSync |
If true, the client delays synchronizing to a newly declared
master (defaults to false). Clients configured in this way
remain unsynchronized until the application calls
RepSync()()().
|
![]() | DisablePoll |
If true, then prevents the use of poll() for polling network events
|
![]() | DisableSSL |
If true, then prevents the use of SSL for securing messages shared
between nodes of a replication group.
|
![]() | Elections |
If true, Replication Manager automatically runs elections to
choose a new master when the old master appears to
have become disconnected (defaults to true).
|
![]() | EnableEpoll |
If true, then forces the use of Epoll for polling of network events
|
![]() | ForwardWrites |
Enable simple write forwarding for this site. By default, write
operations cannot be performed on a replication client site. This
option enables forwarding of simple client put and delete operations
to the master site for processing. These operations must use an implicit
NULL transaction ID to be forwarded. Any other write operation that
specifies a non-NULL transaction throws a DatabaseException. The master
must have an open database handle for the database on which a forwarded
write operation is being performed. All sites in the replication group
should have the same value for this configuration option.
|
![]() | InMemory |
If true, replication only stores the internal information in-memory
and cannot keep persistent state across a site crash or reboot. By
default, it is false and replication creates files in the
environment home directory to preserve the internal information.
This configuration flag can only be set before the
DatabaseEnvironment is opened.
|
![]() | NoBlocking |
If true, Berkeley DB method calls that would normally block while
clients are in recovery will return errors immediately (defaults to
false).
|
![]() | PrefmasClient |
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.
|
![]() | PrefmasMaster |
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.
|
![]() | RepMgrAckPolicy |
Specify how master and client sites handle the acknowledgment of
replication messages which is necessary for "permanent" records.
The current implementation requires all sites in a replication group
to configure the same acknowledgement policy.
|
![]() | RepmgrSitesConfig |
A list of site configurations.
|
![]() | Strict2Site |
If true, the 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 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.
|
![]() | Transport |
The delegate used to transmit data using the replication
application's communication infrastructure.
|
![]() | UseMasterLeases |
If true, master leases are used for this site (defaults to
false).
|
Properties
Name | Description | |
---|---|---|
![]() | AckTimeout |
The amount of time the replication manager's transport function
waits to collect enough acknowledgments from replication group
clients, before giving up and returning a failure indication. The
default wait time is 1 second.
|
![]() | CheckpointDelay |
The amount of time a master site delays between completing a
checkpoint and writing a checkpoint record into the log.
|
![]() | ClockskewFast |
The value, relative to ClockskewSlow, of the fastest
clock in the group of sites.
|
![]() | ClockskewSlow |
The value of the slowest clock in the group of sites.
|
![]() | ConnectionRetry |
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.
|
![]() | ElectionRetry |
Configure the amount of time the replication manager waits
before retrying a failed election. The default wait time is 10
seconds.
|
![]() | ElectionTimeout |
The timeout period for an election. The default timeout is 2
seconds.
|
![]() | FullElectionTimeout |
An optional configuration timeout period to wait for full election
participation the first time the replication group finds a master.
By default this option is turned off and normal election timeouts
are used. (See the Elections section in the Berkeley DB Reference
Guide for more information.)
|
![]() | HeartbeatMonitor |
The amount of time the replication manager, running at a client
site, waits for some message activity on the connection from the
master (heartbeats or other messages) before concluding that the
connection has been lost. When 0 (the default), no monitoring is
performed.
|
![]() | HeartbeatSend |
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 are sent.
|
![]() | LeaseTimeout |
The amount of time a client grants its master lease to a master.
When using master leases all sites in a replication group must use
the same lease timeout value. There is no default value. If leases
are desired, this method must be called prior to calling
RepStartClient()()() or
RepStartMaster()()().
|
![]() | NSites |
The total number of sites in the replication group.
|
![]() | Priority |
The database environment's priority in replication group elections.
A special value of 0 indicates that this environment cannot be a
replication group master. If not configured, then a default value
of 100 is used.
|
![]() | ReplicationView |
Create a replication view and specify the function to determine
whether a database file is replicated to the local site.
|
![]() | RepmgrIncomingQueueMaxBytes |
The bytes component of the maximum amount of dynamic memory
used by the Replication Manager incoming queue.
|
![]() | RepmgrIncomingQueueMaxGBytes |
The gigabytes component of the maximum amount of dynamic memory
used by the Replication Manager incoming queue.
|
![]() | RetransmissionRequestMax |
The maximum number of microseconds a client waits before requesting
retransmission.
|
![]() | RetransmissionRequestMin |
The minimum number of microseconds a client waits before requesting
retransmission.
|
![]() | TransmitLimitBytes |
The bytes component of the byte-count limit on the amount of data
that is transmitted from a site in response to a single
message processed by
RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32).
|
![]() | TransmitLimitGBytes |
The gigabytes component of the byte-count limit on the amount of
data that is transmitted from a site in response to a single
message processed by
RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32).
|
![]() | WriteForwardTimeout |
Configure the amount of time a Replication Manager client waits
for a response from a forwarded write operation before returning
a failure indication. The default value is 5 seconds.
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