gemfire.properties and gfsecurity.properties (vFabric GemFire Property Files)

You use the gemfire.properties settings to join a distributed system and configure system member behavior. Distributed system members include applications, the cacheserver, the locator, and other GemFire processes.

You can place security-related (properties that begin with security-*) configuration properties that are normally configured in gemfire.properties in a separate gfsecurity.properties file. Placing these configuration settings in a separate file allows you to restrict access to security configuration data. This way, you can still allow read or write access for your gemfire.properties file.

You can specify non-ASCII text in your properties files by using Unicode escape sequences. See Using Non-ASCII Strings in vFabric GemFire Property Files for more details.

Note: Unless otherwise indicated, these settings only affect activities within this distributed system - not activities between clients and servers or between gateways in multi-site installations.
Setting Definition Default
ack-severe-alert-threshold Number of seconds the distributed system will wait after the ack-wait-threshold for a message to be acknowledged before it issues an alert at severe level. A value of zero disables this feature. 0
ack-wait-threshold Number of seconds a distributed message can wait for acknowledgment before it sends an alert to signal that something might be wrong with the system member that is unresponsive.

The waiter continues to wait. The alerts are logged in the system member’s log as warnings.

Valid values are in the range 0...2147483647
15
archive-disk-space-limit Maximum size (in megabytes) of all inactive statistic archive files combined. If this limit is exceeded, inactive archive files are deleted, oldest first, until the total size is within the limit. If set to zero, disk space use is unlimited. 0
archive-file-size-limit The maximum size (in megabytes) of a single statistic archive file. Once this limit is exceeded, a new statistic archive file is created, and the current archive file becomes inactive. If set to zero, file size is unlimited. 0
async-distribution-timeout The number of milliseconds a process that is publishing to this process should attempt to distribute a cache operation before switching over to asynchronous messaging for this process. The switch to asynchronous messaging lasts until this process catches up, departs, or some specified limit is reached, such as async-queue-timeout or async-max-queue-size.
To enable asynchronous messaging, the value must be set above zero. Valid values are in the range 0...60000.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
0
async-max-queue-size Affects non-conflated asynchronous queues for members that publish to this member. This is the maximum size the queue can reach (in megabytes) before the publisher asks this member to leave the distributed system.
Valid values are in the range 0..1024.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
8
async-queue-timeout Affects asynchronous queues for members that publish to this member. This is the maximum milliseconds the publisher should wait with no distribution to this member before it asks this member to leave the distributed system. Used for handling slow receivers.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
60000
bind-address Relevant only for multi-homed hosts - machines with multiple network interface cards. Specifies the adapter card the cache binds to for peer-to-peer communication. Also specifies the default location for GemFire servers to listen on, which is used unless overridden by the server-bind-address. An empty string causes the member to listen on the default card for the machine. This is a machine-wide attribute used for system member and client/server communication. It has no effect on locator location, unless the locator is embedded in a member process.

Specify the IP address, not the hostname, because each network card may not have a unique hostname. An empty string (the default) causes the member to listen on the default card for the machine.

not set
cache-xml-file Declarative initialization file for the member's cache. cache.xml
conflate-events Used only by clients in a client/server installation. This is a client-side property that is passed to the server. Affects subscription queue conflation in this client's servers. Specifies whether to conflate (true setting), not conflate (false), or to use the server's conflation setting (server). server
conserve-sockets Specifies whether sockets are shared by the system member’s threads. If true, threads share, and a minimum number of sockets are used to connect to the distributed system. If false, every application thread has its own sockets for distribution purposes. You can override this setting for individual threads inside your application. Where possible, it is better to set conserve-sockets to true and enable the use of specific extra sockets in the application code if needed. true
delta-propagation Specifies whether to distribute the deltas for entry updates, instead of the full values, between clients and servers and between peers. true
disable-tcp Boolean indicating whether to disable the use of TCP/IP sockets for inter-cache point-to-point messaging. If disabled, the cache uses datagram (UDP) sockets. false
distributed-system-id Identifier used to distinguish messages from different distributed systems. Set this to different values for different systems in a multi-site (WAN) configuration. This is required for Portable Data eXchange (PDX) data serialization. This setting must be the same for every member in the same distributed system and unique to the distributed system within the WAN installation. -1 means no setting. Valid values are integers in the range -1...255. -1
durable-client-id Used only for clients in a client/server installation. If set, this indicates that the client is durable and identifies the client. The ID is used by servers to reestablish any messaging that was interrupted by client downtime. not set
durable-client-timeout Used only for clients in a client/server installation. Number of seconds this client can remain disconnected from its server and have the server continue to accumulate durable events for it. 300
enable-network-partition-detection Boolean instructing the system to detect and handle splits in the distributed system, typically caused by a partitioning of the network (split brain) where the distributed system is running. false
enable-time-statistics Boolean instructing the system to track time-based statistics for the distributed system and caching. Disabled by default for performance. false
enforce-unique-host Whether partitioned regions will put redundant copies of the same data in different members running on the same physical machine. By default, GemFire tries to put redundant copies on different machines, but it will put them on the same machine if no other machines are available. Setting this property to true prevents this and requires different machines for redundant copies. false
license-application-cache Specifies the serial number this distributed system member will use unless a license-data-management serial number is also specified. This distributed member will attempt to activate a GemFire Application Cache Node license which allows it to be a peer-to-peer application cache node. If a license-data-management serial number is also provided, then the license-application-cache serial number may be specified as the license for cache clients connecting to this node. The keyword "dynamic" may be used to specify that the member will attempt to acquire a license from either a vFabric serial number file or a vFabric License Server. not set
license-data-management Specifies the serial number(s) this distributed system member will use. This distributed member will attempt to activate a GemFire Data Management Node license which allows it to provide advanced data management services. This includes hosting a cache server to which cache clients may connect. If you have serial numbers for the Unlimited Client Upgrade or Global WAN Upgrade, then list them after the serial number for Data Management Node separating each with a comma. If you do not have the Unlimited Client Upgrade, then you should also use license-application-cache to specify the serial number for the cache clients that will connect to this cache server. The keyword "dynamic" may be used to specify that the member will attempt to acquire a license from either a vFabric serial number file or a vFabric License Server. not set
license-server-timeout Specifies the maximum number of milliseconds to wait for a license from a vFabric License Server when attempting to dynamically acquire a license. This timeout is observed when using the keyword "dynamic" for either of the licensing properties license-data-management or license-application-cache.

Valid values are in the range of 1000...3600000

10000
license-working-dir The writable directory where this member persists runtime information about licensing. Keep this directory the same between runs for each member so the member application can read what it persisted on the last run. member's current working directory as determined by System.getProperty("user.dir")
locators

The list of locators used by system members. The list must be configured consistently for every member of the distributed system. If the list is empty, locators are not used.

For each locator, provide a host name and/or address (separated by ‘@’, if you use both), followed by a port number in brackets. Examples:
locators=address1[port1],address2[port2] 
locators=hostName1@address1[port1],hostName2@address2[port2] 
locators=hostName1[port1],hostName2[port2]
Note: On multi-homed hosts, this last notation will use the default address. If you use bind addresses for your locators, explicitly specify the addresses in the locators list—do not use just the hostname.
not set
log-disk-space-limit Maximum size in megabytes of all inactive log files combined. If this limit is exceeded, inactive log files are deleted, oldest first, until the total size is within the limit. If set to zero, disk space use is unlimited. 0
log-file File to which a running system member writes log messages. If set to null, the default is used.
Each member type has its own default output:
  • application: standard out
  • locator: locator.log
  • cacheserver: cacheserver.log
null
log-file-size-limit Maximum size in megabytes of a log file before it is closed and logging rolls on to a new (child) log file. If set to 0, log rolling is disabled. 0
log-level Level of detail of the messages written to the system member’s log. Setting log-level to one of the ordered levels causes all messages of that level and greater severity to be printed.

Valid values from lowest to highest are fine, config, info, warning, error, severe, and none.

config
max-num-reconnect-tries Used when a cache region's membership attributes specify to disconnect from the distributed system and reconnect in an attempt to regain lost membership roles. Maximum number of times to try to reconnect to the distributed system when membership roles are missing. 3
max-wait-time-reconnect Used when a cache region's membership attributes specify to disconnect from the distributed system and reconnect in an attempt to regain lost membership roles. Maximum number of milliseconds to wait for the distributed system to reconnect on each reconnect attempt. 10000

mcast-address

Address used to discover other members of the distributed system. Only used if mcast-port is non-zero. This attribute must be consistent across the distributed system.
Note: Select different multicast addresses and different ports for different distributed systems. Do not just use different addresses. Some operating systems may not keep communication separate between systems that use unique addresses but the same port number.

This default multicast address was assigned by IANA ( http://www.iana.org/assignments/multicast-addresses ). Consult the IANA chart when selecting another multicast address to use with GemFire.

Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication. If multicast is enabled, distributed regions use it for most communication. Partitioned regions only use multicast for a few purposes, and mainly use either TCP or UDP unicast.
239.192.81.1 for IPv4 (the default IP version)

FF38::1234 for IPv6

mcast-flow-control Tuning property for flow-of-control protocol for unicast and multicast no-ack UDP messaging. Compound property made up of three settings separated by commas: byteAllowance, rechargeThreshold, and rechargeBlockMs.
Valid values range from these minimums: 10000,0.1,500 to these maximums: no_maximum ,0.5,60000.
Note: This setting controls only peer-to-peer communication, generally between distributed regions.
1048576,0.25, 5000

mcast-port

Port used, along with the mcast-address, for multicast communication with other members of the distributed system. If zero, multicast is disabled for member discovery and distribution.
Note: Select different multicast addresses and ports for different distributed systems. Do not just use different addresses. Some operating systems may not keep communication separate between systems that use unique addresses but the same port number.

Valid values are in the range 0..65535.

Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
10334
mcast-recv-buffer-size Size of the socket buffer used for incoming multicast transmissions. You should set this high if there will be high volumes of messages.

Valid values are in the range 2048.. OS_maximum.

Note: The default setting is higher than the default OS maximum buffer size on Unix, which should be increased to at least 1 megabyte to provide high-volume messaging on Unix systems.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
1048576
mcast-send-buffer-size The size of the socket buffer used for outgoing multicast transmissions.
Valid values are in the range 2048.. OS_maximum.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
65535
mcast-ttl How far multicast messaging goes in your network. Lower settings may improve system performance. A setting of 0 constrains multicast messaging to the machine.
Note: This setting controls only peer-to-peer communication and does not apply to client/server or multi-site communication.
32
member-timeout GemFire uses the member-timeout server configuration, specified in milliseconds, to detect the abnormal termination of members. The configuration setting is used in two ways: 1) First it is used during the UDP heartbeat detection process. When a member detects that a heartbeat datagram is missing from the member that it is monitoring after the time interval of 2 * the value of member-timeout, the detecting member attempts to form a TCP/IP stream-socket connection with the monitored member as described in the next case. 2) The property is then used again during the TCP/IP stream-socket connection. If the suspected process does not respond to the are you alive datagram within the time period specified in member-timeout, the membership coordinator sends out a new membership view that notes the member's failure.

Valid values are in the range 1000..600000.

5000

membership-port-range

The range of ports available for unicast UDP messaging and for TCP failure detection. This is specified as two integers separated by a minus sign. Different members can use different ranges.

GemFire randomly chooses two unique integers from this range for the member, one for UDP unicast messaging and the other for TCP failure detection messaging. Additionally, the system uniquely identifies the member using the combined host IP address and UDP port number.

You may want to restrict the range of ports that GemFire uses so the product can run in an environment where routers only allow traffic on certain ports.

1024-65535
name Symbolic name used to identify this system member. not set
redundancy-zone Defines this member's redundancy zone. Used to separate member's into different groups for satisfying partitioned region redundancy. If this property is set, GemFire will not put redundant copies of data in members with the same redundancy zone setting. not set
remove-unresponsive-client When this property is set to true, the primary server drops unresponsive clients from all secondaries and itself. Clients are deemed unresponsive when their messaging queues become full on the server. While a client's queue is full, puts that would add to the queue block on the server. false
roles Comma-delimited list of strings specifying the membership roles that this member performs in the distributed system. not set
security-* Used for authentication. Any custom properties needed by your AuthInitialize or Authenticator callbacks.
Note: Any security-related (properties that begin with security-*) configuration properties that are normally configured in gemfire.properties can be moved to a separate gfsecurity.properties file. Placing these configuration settings in a separate file allows you to restrict access to security configuration data. This way, you can still allow read or write access for your gemfire.properties file.
not set
security-client-accessor Used for authorization. Static creation method returning an AccessControl object, which determines authorization of client-server cache operations. This specifies the callback that should be invoked in the pre-operation phase, which is when the request for the operation is received from the client. not set
security-client-accessor-pp Used for authorization. The callback that should be invoked in the post-operation phase, which is when the operation has completed on the server but before the result is sent to the client. The post-operation callback is also invoked for the updates that are sent from server to client through the notification channel. not set
security-client-auth-init Used for authentication. Static creation method returning an AuthInitialize object, which obtains credentials for peers in a distributed system. The obtained credentials should be acceptable to the Authenticator specified through the security-peer-authenticator property on the peers. not set
security-client-authenticator Used for authentication. Static creation method returning an Authenticator object, which is used by a peer to verify the credentials of the connecting peer. not set
security-client-dhalgo Used for authentication. For secure transmission of sensitive credentials like passwords, you can encrypt the credentials using the Diffie-Hellman key exchange algorithm. Do this by setting the security-client-dhalgo system property on the clients to the name of a valid symmetric key cipher supported by the JDK. not set
security-log-file Used with authentication. The log file for security log messages. If not specified, the member's regular log file is used. not set
security-log-level Used with authentication. Logging level detail for security log messages.

Valid values from lowest to highest are fine, config, info, warning, error, severe, and none.

config
security-peer-auth-init Used with authentication. Static creation method returning an AuthInitialize object, which obtains credentials for peers in a distributed system. The obtained credentials should be acceptable to the Authenticator specified through the security-peer-authenticator property on the peers. not set
security-peer-authenticator Used with authentication. Static creation method returning an Authenticator object, which is used by a peer to verify the credentials of the connecting peer. not set
security-peer-verifymember-timeout Used with authentication. Timeout in milliseconds used by a peer to verify membership of an unknown authenticated peer requesting a secure connection. 1000
server-bind-address Relevant only for multi-homed hosts - machines with multiple network interface cards. Network adapter card a GemFire server binds to for client/server communication. You can use this to separate the server’s client/server communication from its peer-to-peer communication, spreading the traffic load.

This is a machine-wide attribute used for communication with clients in client/server and multi-site installations. This setting has no effect on locator configuration.

Specify the IP address, not the hostname, because each network card may not have a unique hostname.

An empty string causes the servers to listen on the same card used for peer-to-peer communication. This is either the bind-address or, if that is not set, the machine’s default card.

not set
socket-buffer-size Receive buffer sizes in bytes of the TCP/IP connections used for data transmission. To minimize the buffer size allocation needed for distributing large, serializable messages, the messages are sent in chunks. This setting determines the size of the chunks. Larger buffers can handle large messages more quickly, but take up more memory. 32768
socket-lease-time Time, in milliseconds, a thread can have exclusive access to a socket it is not actively using. A value of zero causes socket leases to never expire. This property is ignored if conserve-sockets is true.

Valid values are in the range 0..600000.

60000
ssl-ciphers Used for SSL security. A space-separated list of the valid SSL ciphers for this connection. A setting of 'any' uses any ciphers that are enabled by default in the configured JSSE provider. any
ssl-enabled Used for SSL security. Boolean indicating whether to use SSL for member communications. A true setting requires the use of locators. This attribute must be consistent across the distributed system. false
ssl-protocols Used for SSL security. A space-separated list of the valid SSL protocols for this connection. A setting of 'any' uses any protocol that is enabled by default in the configured JSSE provider. any
ssl-require-authentication Used for SSL security. Boolean indicating whether to require authentication for member communication. true
start-locator If set, automatically starts a locator in the current process when the member connects to the distributed system and stops the locator when the member disconnects.
To use, specify the locator with an optional address or host specification and a required port number, in one of these formats:
start-locator=address[port1] 
start-locator=port1
If you only specify the port, the address assigned to the member is used for the locator.
If not already there, this locator is automatically added to the list of locators in this set of gemfire properties.
not set
statistic-archive-file The file to which the running system member writes statistic samples. An empty string disables archiving. Adding .gz suffix to the file name causes it to be compressed. not set
statistic-sample-rate How often to sample statistics, in milliseconds.

Valid values are in the range 100..60000.

1000
statistic-sampling-enabled Whether to collect and archive statistics on the member.

Turning statistics sampling off saves on resources, but it also takes away potentially valuable information for ongoing system tuning and about unexpected system problems.

Note: This setting does not apply to partitioned regions, where statistics are always enabled.
false

tcp-port

The TCP port to listen on for cache communications. If set to zero, the operating system selects an available port. Each process on a machine must have its own TCP port. Note that some operating systems restrict the range of ports usable by non-privileged users, and using restricted port numbers can cause runtime errors in GemFire startup.

Valid values are in the range 0..65535.

0
udp-fragment-size Maximum fragment size, in bytes, for transmission over UDP unicast or multicast sockets. Smaller messages are combined, if possible, for transmission up to the fragment size setting.

Valid values are in the range 1000..60000.

60000
udp-recv-buffer-size The size of the socket buffer used for incoming UDP point-to-point transmissions. If disable-tcp is false, a reduced buffer size of 65535 is used by default.

The default setting of 1048576 is higher than the default OS maximum buffer size on Unix, which should be increased to at least 1 megabyte to provide high-volume messaging on Unix systems.

Valid values are in the range 2048.. OS_maximum.

1048576
udp-send-buffer-size The size of the socket buffer used for outgoing UDP point-to-point transmissions.

Valid values are in the range 2048..OS_maximum.

65535
writable-working-dir The writable directory where this member should persist runtime information about licensing. Keep this directory the same between runs for each member so the member application can read what it persisted on the last run.
Note: This property is deprecated as of 6.6.1. Use license-working-dir instead.
member's current working directory as determined by System.getProperty("user.dir")