Configuration Properties

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Property	Description
gc.*	Properties in this category affect the behavior of the accumulo garbage collector.
gc.cycle.delay	Time between garbage collection cycles. In each cycle, old files no longer in use are removed from the filesystem. type: TIMEDURATION, zk mutable: yes, default value: `5m`
gc.cycle.start	Time to wait before attempting to garbage collect any old files. type: TIMEDURATION, zk mutable: yes, default value: `30s`
gc.file.archive	Archive any files/directories instead of moving to the HDFS trash or deleting. type: BOOLEAN, zk mutable: yes, default value: `false`
gc.port.client	The listening port for the garbage collector’s monitor service type: PORT, zk mutable: yes but requires restart of the gc, default value: `9998`
gc.threads.delete	The number of threads used to delete files type: COUNT, zk mutable: yes, default value: `16`
gc.trace.percent	Percent of gc cycles to trace type: FRACTION, zk mutable: yes, default value: `0.01`
gc.trash.ignore	Do not use the Trash, even if it is configured. type: BOOLEAN, zk mutable: yes, default value: `false`
general.*	Properties in this category affect the behavior of accumulo overall, but do not have to be consistent throughout a cloud.
general.classpaths	Deprecated. This property is deprecated. The class path should instead be configured by the launch environment (for example, accumulo-env.sh). A list of all of the places to look for a class. Order does matter, as it will look for the jar starting in the first location to the last. Supports full regex on filename alone. type: STRING, zk mutable: no, default value: empty
general.custom.*	Prefix to be used for user defined system-wide properties. This may be particularly useful for system-wide configuration for various user-implementations of pluggable Accumulo features, such as the balancer or volume chooser.
general.delegation.token.lifetime	The length of time that delegation tokens and secret keys are valid type: TIMEDURATION, zk mutable: no, default value: `7d`
general.delegation.token.update.interval	The length of time between generation of new secret keys type: TIMEDURATION, zk mutable: no, default value: `1d`
general.dynamic.classpaths	A list of all of the places where changes in jars or classes will force a reload of the classloader. type: STRING, zk mutable: no, default value: `$ACCUMULO_HOME/lib/ext/[^.].*.jar`
general.kerberos.keytab	Path to the kerberos keytab to use. Leave blank if not using kerberoized hdfs type: PATH, zk mutable: no, default value: empty
general.kerberos.principal	Name of the kerberos principal to use. _HOST will automatically be replaced by the machines hostname in the hostname portion of the principal. Leave blank if not using kerberoized hdfs type: STRING, zk mutable: no, default value: empty
general.kerberos.renewal.period	The amount of time between attempts to perform Kerberos ticket renewals. This does not equate to how often tickets are actually renewed (which is performed at 80% of the ticket lifetime). type: TIMEDURATION, zk mutable: no, default value: `30s`
general.legacy.metrics	Use the old metric infrastructure configured by accumulo-metrics.xml, instead of Hadoop Metrics2 type: BOOLEAN, zk mutable: no, default value: `false`
general.max.scanner.retry.period	The maximum amount of time that a Scanner should wait before retrying a failed RPC type: TIMEDURATION, zk mutable: no, default value: `5s`
general.rpc.timeout	Time to wait on I/O for simple, short RPC calls type: TIMEDURATION, zk mutable: no, default value: `120s`
general.security.credential.provider.paths	Comma-separated list of paths to CredentialProviders type: STRING, zk mutable: no, default value: empty
general.server.message.size.max	The maximum size of a message that can be sent to a server. type: BYTES, zk mutable: no, default value: `1G`
general.server.simpletimer.threadpool.size	The number of threads to use for server-internal scheduled tasks type: COUNT, zk mutable: no, default value: `1`
general.vfs.cache.dir	Directory to use for the vfs cache. The cache will keep a soft reference to all of the classes loaded in the VM. This should be on local disk on each node with sufficient space. It defaults to ${java.io.tmpdir}/accumulo-vfs-cache-${user.name} type: ABSOLUTEPATH, zk mutable: no, default value: `${java.io.tmpdir}/accumulo-vfs-cache-${user.name}`
general.vfs.classpaths	Configuration for a system level vfs classloader. Accumulo jar can be configured here and loaded out of HDFS. type: STRING, zk mutable: no, default value: empty
general.vfs.context.classpath.*	Properties in this category are define a classpath. These properties start with the category prefix, followed by a context name. The value is a comma seperated list of URIs. Supports full regex on filename alone. For example, general.vfs.context.classpath.cx1=hdfs://nn1:9902/mylibdir/*.jar. You can enable post delegation for a context, which will load classes from the context first instead of the parent first. Do this by setting general.vfs.context.classpath..delegation=post, where is your context nameIf delegation is not specified, it defaults to loading from parent classloader first.
instance.*	Properties in this category must be consistent throughout a cloud. This is enforced and servers won’t be able to communicate if these differ.
instance.dfs.dir	Deprecated. ~~HDFS directory in which accumulo instance will run. Do not change after accumulo is initialized.~~ type: ABSOLUTEPATH, zk mutable: no, default value: `/accumulo`
instance.dfs.uri	Deprecated. A url accumulo should use to connect to DFS. If this is empty, accumulo will obtain this information from the hadoop configuration. This property will only be used when creating new files if instance.volumes is empty. After an upgrade to 1.6.0 Accumulo will start using absolute paths to reference files. Files created before a 1.6.0 upgrade are referenced via relative paths. Relative paths will always be resolved using this config (if empty using the hadoop config). type: URI, zk mutable: no, default value: empty
instance.rpc.sasl.allowed.host.impersonation	One-line configuration property controlling the network locations (hostnames) that are allowed to impersonate other users type: STRING, zk mutable: no, default value: empty
instance.rpc.sasl.allowed.user.impersonation	One-line configuration property controlling what users are allowed to impersonate other users type: STRING, zk mutable: no, default value: empty
instance.rpc.sasl.enabled	Configures Thrift RPCs to require SASL with GSSAPI which supports Kerberos authentication. Mutually exclusive with SSL RPC configuration. type: BOOLEAN, zk mutable: no, default value: `false`
instance.rpc.sasl.impersonation.*	Deprecated. ~~Prefix that allows configuration of users that are allowed to impersonate other users~~
instance.rpc.ssl.clientAuth	Require clients to present certs signed by a trusted root type: BOOLEAN, zk mutable: no, default value: `false`
instance.rpc.ssl.enabled	Use SSL for socket connections from clients and among accumulo services. Mutually exclusive with SASL RPC configuration. type: BOOLEAN, zk mutable: no, default value: `false`
instance.secret	A secret unique to a given instance that all servers must know in order to communicate with one another.It should be changed prior to the initialization of Accumulo. To change it after Accumulo has been initialized, use the ChangeSecret tool and then update accumulo-site.xml everywhere. Before using the ChangeSecret tool, make sure Accumulo is not running and you are logged in as the user that controls Accumulo files in HDFS. To use the ChangeSecret tool, run the command: ./bin/accumulo org.apache.accumulo.server.util.ChangeSecret type: STRING, zk mutable: no, default value: `DEFAULT`
instance.security.authenticator	The authenticator class that accumulo will use to determine if a user has privilege to perform an action type: CLASSNAME, zk mutable: no, default value: `org.apache.accumulo.server.security.handler.ZKAuthenticator`
instance.security.authorizor	The authorizor class that accumulo will use to determine what labels a user has privilege to see type: CLASSNAME, zk mutable: no, default value: `org.apache.accumulo.server.security.handler.ZKAuthorizor`
instance.security.permissionHandler	The permission handler class that accumulo will use to determine if a user has privilege to perform an action type: CLASSNAME, zk mutable: no, default value: `org.apache.accumulo.server.security.handler.ZKPermHandler`
instance.volumes	A comma seperated list of dfs uris to use. Files will be stored across these filesystems. If this is empty, then instance.dfs.uri will be used. After adding uris to this list, run ‘accumulo init –add-volume’ and then restart tservers. If entries are removed from this list then tservers will need to be restarted. After a uri is removed from the list Accumulo will not create new files in that location, however Accumulo can still reference files created at that location before the config change. To use a comma or other reserved characters in a URI use standard URI hex encoding. For example replace commas with %2C. type: STRING, zk mutable: no, default value: empty
instance.volumes.replacements	Since accumulo stores absolute URIs changing the location of a namenode could prevent Accumulo from starting. The property helps deal with that situation. Provide a comma separated list of uri replacement pairs here if a namenode location changes. Each pair shold be separated with a space. For example, if hdfs://nn1 was replaced with hdfs://nnA and hdfs://nn2 was replaced with hdfs://nnB, then set this property to ‘hdfs://nn1 hdfs://nnA,hdfs://nn2 hdfs://nnB’ Replacements must be configured for use. To see which volumes are currently in use, run ‘accumulo admin volumes -l’. To use a comma or other reserved characters in a URI use standard URI hex encoding. For example replace commas with %2C. type: STRING, zk mutable: no, default value: empty
instance.zookeeper.host	Comma separated list of zookeeper servers type: HOSTLIST, zk mutable: no, default value: `localhost:2181`
instance.zookeeper.timeout	Zookeeper session timeout; max value when represented as milliseconds should be no larger than 2147483647 type: TIMEDURATION, zk mutable: no, default value: `30s`
master.*	Properties in this category affect the behavior of the master server
master.bulk.rename.threadpool.size	The number of threads to use when moving user files to bulk ingest directories under accumulo control type: COUNT, zk mutable: yes, default value: `20`
master.bulk.retries	The number of attempts to bulk-load a file before giving up. type: COUNT, zk mutable: yes, default value: `3`
master.bulk.threadpool.size	The number of threads to use when coordinating a bulk-import. type: COUNT, zk mutable: yes, default value: `5`
master.bulk.timeout	The time to wait for a tablet server to process a bulk import request type: TIMEDURATION, zk mutable: yes, default value: `5m`
master.fate.threadpool.size	The number of threads used to run FAult-Tolerant Executions. These are primarily table operations like merge. type: COUNT, zk mutable: yes, default value: `4`
master.lease.recovery.interval	The amount of time to wait after requesting a WAL file to be recovered type: TIMEDURATION, zk mutable: yes, default value: `5s`
master.metadata.suspendable	Allow tablets for the accumulo.metadata table to be suspended via table.suspend.duration. type: BOOLEAN, zk mutable: yes, default value: `false`
master.port.client	The port used for handling client connections on the master type: PORT, zk mutable: yes but requires restart of the master, default value: `9999`
master.recovery.delay	When a tablet server’s lock is deleted, it takes time for it to completely quit. This delay gives it time before log recoveries begin. type: TIMEDURATION, zk mutable: yes, default value: `10s`
master.recovery.max.age	Recovery files older than this age will be removed. type: TIMEDURATION, zk mutable: yes, default value: `60m`
master.recovery.time.max	The maximum time to attempt recovery before giving up type: TIMEDURATION, zk mutable: yes, default value: `30m`
master.replication.coordinator.minthreads	Minimum number of threads dedicated to answering coordinator requests type: COUNT, zk mutable: yes, default value: `4`
master.replication.coordinator.port	Port for the replication coordinator service type: PORT, zk mutable: yes, default value: `10001`
master.replication.coordinator.threadcheck.time	The time between adjustments of the coordinator thread pool type: TIMEDURATION, zk mutable: yes, default value: `5s`
master.replication.status.scan.interval	Amount of time to sleep before scanning the status section of the replication table for new data type: TIMEDURATION, zk mutable: yes, default value: `30s`
master.server.threadcheck.time	The time between adjustments of the server thread pool. type: TIMEDURATION, zk mutable: yes, default value: `1s`
master.server.threads.minimum	The minimum number of threads to use to handle incoming requests. type: COUNT, zk mutable: yes, default value: `20`
master.status.threadpool.size	The number of threads to use when fetching the tablet server status for balancing. type: COUNT, zk mutable: yes, default value: `1`
master.tablet.balancer	The balancer class that accumulo will use to make tablet assignment and migration decisions. type: CLASSNAME, zk mutable: yes, default value: `org.apache.accumulo.server.master.balancer.TableLoadBalancer`
master.walog.closer.implementation	A class that implements a mechansim to steal write access to a file type: CLASSNAME, zk mutable: yes, default value: `org.apache.accumulo.server.master.recovery.HadoopLogCloser`
monitor.*	Properties in this category affect the behavior of the monitor web server.
monitor.banner.background	The background color of the banner text displayed on the monitor page. type: STRING, zk mutable: yes, default value: `#304065`
monitor.banner.color	The color of the banner text displayed on the monitor page. type: STRING, zk mutable: yes, default value: `#c4c4c4`
monitor.banner.text	The banner text displayed on the monitor page. type: STRING, zk mutable: yes, default value: empty
monitor.lock.check.interval	The amount of time to sleep between checking for the Montior ZooKeeper lock type: TIMEDURATION, zk mutable: no, default value: `5s`
monitor.log.date.format	The SimpleDateFormat string used to configure the date shown on the ‘Recent Logs’ monitor page type: STRING, zk mutable: no, default value: `yyyy/MM/dd HH:mm:ss,SSS`
monitor.port.client	The listening port for the monitor’s http service type: PORT, zk mutable: no, default value: `9995`
monitor.port.log4j	The listening port for the monitor’s log4j logging collection. type: PORT, zk mutable: no, default value: `4560`
monitor.ssl.exclude.ciphers	A comma-separated list of disallowed SSL Ciphers, see mmonitor.ssl.include.ciphers to allow ciphers type: STRING, zk mutable: no, default value: empty
monitor.ssl.include.ciphers	A comma-separated list of allows SSL Ciphers, see monitor.ssl.exclude.ciphers to disallow ciphers type: STRING, zk mutable: no, default value: empty
monitor.ssl.include.protocols	A comma-separate list of allowed SSL protocols type: STRING, zk mutable: no, default value: `TLSv1,TLSv1.1,TLSv1.2`
monitor.ssl.keyStore	The keystore for enabling monitor SSL. type: PATH, zk mutable: no, default value: empty
monitor.ssl.keyStorePassword	The keystore password for enabling monitor SSL. type: STRING, zk mutable: no, default value: empty
monitor.ssl.keyStoreType	Type of SSL keystore type: STRING, zk mutable: no, default value: `jks`
monitor.ssl.trustStore	The truststore for enabling monitor SSL. type: PATH, zk mutable: no, default value: empty
monitor.ssl.trustStorePassword	The truststore password for enabling monitor SSL. type: STRING, zk mutable: no, default value: empty
monitor.ssl.trustStoreType	Type of SSL truststore type: STRING, zk mutable: no, default value: `jks`
replication.*	Properties in this category affect the replication of data to other Accumulo instances.
replication.driver.delay	Amount of time to wait before the replication work loop begins in the master. type: TIMEDURATION, zk mutable: yes, default value: `0s`
replication.max.unit.size	Maximum size of data to send in a replication message type: BYTES, zk mutable: yes, default value: `64M`
replication.max.work.queue	Upper bound of the number of files queued for replication type: COUNT, zk mutable: yes, default value: `1000`
replication.name	Name of this cluster with respect to replication. Used to identify this instance from other peers type: STRING, zk mutable: yes, default value: empty
replication.peer.*	Properties in this category control what systems data can be replicated to
replication.peer.keytab.*	The keytab to use when authenticating with the given peer
replication.peer.password.*	The password to provide when authenticating with the given peer
replication.peer.user.*	The username to provide when authenticating with the given peer
replication.receipt.service.port	Listen port used by thrift service in tserver listening for replication type: PORT, zk mutable: yes, default value: `10002`
replication.receiver.min.threads	Minimum number of threads for replication type: COUNT, zk mutable: yes, default value: `1`
replication.receiver.threadcheck.time	The time between adjustments of the replication thread pool. type: TIMEDURATION, zk mutable: yes, default value: `30s`
replication.rpc.timeout	Amount of time for a single replication RPC call to last before failing the attempt. See replication.work.attempts. type: TIMEDURATION, zk mutable: yes, default value: `2m`
replication.trace.percent	The sampling percentage to use for replication traces type: FRACTION, zk mutable: yes, default value: `0.1`
replication.work.assigner	Replication WorkAssigner implementation to use type: CLASSNAME, zk mutable: yes, default value: `org.apache.accumulo.master.replication.UnorderedWorkAssigner`
replication.work.assignment.sleep	Amount of time to sleep between replication work assignment type: TIMEDURATION, zk mutable: yes, default value: `30s`
replication.work.attempts	Number of attempts to try to replicate some data before giving up and letting it naturally be retried later type: COUNT, zk mutable: yes, default value: `10`
replication.work.processor.delay	Amount of time to wait before first checking for replication work, not useful outside of tests type: TIMEDURATION, zk mutable: yes, default value: `0s`
replication.work.processor.period	Amount of time to wait before re-checking for replication work, not useful outside of tests type: TIMEDURATION, zk mutable: yes, default value: `0s`
replication.worker.threads	Size of the threadpool that each tabletserver devotes to replicating data type: COUNT, zk mutable: yes, default value: `4`
rpc.*	Properties in this category related to the configuration of SSL keys for RPC. See also instance.ssl.enabled
rpc.javax.net.ssl.keyStore	Path of the keystore file for the server’s private SSL key type: PATH, zk mutable: no, default value: empty
rpc.javax.net.ssl.keyStorePassword	Password used to encrypt the SSL private keystore. Leave blank to use the Accumulo instance secret type: STRING, zk mutable: no, default value: empty
rpc.javax.net.ssl.keyStoreType	Type of SSL keystore type: STRING, zk mutable: no, default value: `jks`
rpc.javax.net.ssl.trustStore	Path of the truststore file for the root cert type: PATH, zk mutable: no, default value: empty
rpc.javax.net.ssl.trustStorePassword	Password used to encrypt the SSL truststore. Leave blank to use no password type: STRING, zk mutable: no, default value: empty
rpc.javax.net.ssl.trustStoreType	Type of SSL truststore type: STRING, zk mutable: no, default value: `jks`
rpc.sasl.qop	The quality of protection to be used with SASL. Valid values are ‘auth’, ‘auth-int’, and ‘auth-conf’ type: STRING, zk mutable: no, default value: `auth`
rpc.ssl.cipher.suites	Comma separated list of cipher suites that can be used by accepted connections type: STRING, zk mutable: no, default value: empty
rpc.ssl.client.protocol	The protocol used to connect to a secure server, must be in the list of enabled protocols on the server side (rpc.ssl.server.enabled.protocols) type: STRING, zk mutable: no, default value: `TLSv1`
rpc.ssl.server.enabled.protocols	Comma separated list of protocols that can be used to accept connections type: STRING, zk mutable: no, default value: `TLSv1,TLSv1.1,TLSv1.2`
rpc.useJsse	Use JSSE system properties to configure SSL rather than the rpc.javax.net.ssl.* Accumulo properties type: BOOLEAN, zk mutable: no, default value: `false`
table.*	Properties in this category affect tablet server treatment of tablets, but can be configured on a per-table basis. Setting these properties in the site file will override the default globally for all tables and not any specific table. However, both the default and the global setting can be overridden per table using the table operations API or in the shell, which sets the overridden value in zookeeper. Restarting accumulo tablet servers after setting these properties in the site file will cause the global setting to take effect. However, you must use the API or the shell to change properties in zookeeper that are set on a table.
table.balancer	This property can be set to allow the LoadBalanceByTable load balancer to change the called Load Balancer for this table type: STRING, zk mutable: yes, default value: `org.apache.accumulo.server.master.balancer.DefaultLoadBalancer`
table.bloom.enabled	Use bloom filters on this table. type: BOOLEAN, zk mutable: yes, default value: `false`
table.bloom.error.rate	Bloom filter error rate. type: FRACTION, zk mutable: yes, default value: `0.5%`
table.bloom.hash.type	The bloom filter hash type type: STRING, zk mutable: yes, default value: `murmur`
table.bloom.key.functor	A function that can transform the key prior to insertion and check of bloom filter. org.apache.accumulo.core.file.keyfunctor.RowFunctor,,org.apache.accumulo.core.file.keyfunctor.ColumnFamilyFunctor, and org.apache.accumulo.core.file.keyfunctor.ColumnQualifierFunctor are allowable values. One can extend any of the above mentioned classes to perform specialized parsing of the key. type: CLASSNAME, zk mutable: yes, default value: `org.apache.accumulo.core.file.keyfunctor.RowFunctor`
table.bloom.load.threshold	This number of seeks that would actually use a bloom filter must occur before a file’s bloom filter is loaded. Set this to zero to initiate loading of bloom filters when a file is opened. type: COUNT, zk mutable: yes, default value: `1`
table.bloom.size	Bloom filter size, as number of keys. type: COUNT, zk mutable: yes, default value: `1048576`
table.cache.block.enable	Determines whether file block cache is enabled. type: BOOLEAN, zk mutable: yes, default value: `false`
table.cache.index.enable	Determines whether index cache is enabled. type: BOOLEAN, zk mutable: yes, default value: `true`
table.classpath.context	Per table classpath context type: STRING, zk mutable: yes, default value: empty
table.compaction.major.everything.idle	After a tablet has been idle (no mutations) for this time period it may have all of its files compacted into one. There is no guarantee an idle tablet will be compacted. Compactions of idle tablets are only started when regular compactions are not running. Idle compactions only take place for tablets that have one or more files. type: TIMEDURATION, zk mutable: yes, default value: `1h`
table.compaction.major.ratio	minimum ratio of total input size to maximum input file size for running a major compactionWhen adjusting this property you may want to also adjust table.file.max. Want to avoid the situation where only merging minor compactions occur. type: FRACTION, zk mutable: yes, default value: `3`
table.compaction.minor.idle	After a tablet has been idle (no mutations) for this time period it may have its in-memory map flushed to disk in a minor compaction. There is no guarantee an idle tablet will be compacted. type: TIMEDURATION, zk mutable: yes, default value: `5m`
table.compaction.minor.logs.threshold	When there are more than this many write-ahead logs against a tablet, it will be minor compacted. See comment for property tserver.memory.maps.max type: COUNT, zk mutable: yes, default value: `3`
table.compaction.minor.merge.file.size.max	The max file size used for a merging minor compaction. The default value of 0 disables a max file size. type: BYTES, zk mutable: yes, default value: `0`
table.constraint.*	Properties in this category are per-table properties that add constraints to a table. These properties start with the category prefix, followed by a number, and their values correspond to a fully qualified Java class that implements the Constraint interface. For example: table.constraint.1 = org.apache.accumulo.core.constraints.MyCustomConstraint and: table.constraint.2 = my.package.constraints.MySecondConstraint
table.custom.*	Prefix to be used for user defined arbitrary properties.
table.durability	The durability used to write to the write-ahead log. Legal values are: none, which skips the write-ahead log; log, which sends the data to the write-ahead log, but does nothing to make it durable; flush, which pushes data to the file system; and sync, which ensures the data is written to disk. type: DURABILITY, zk mutable: yes, default value: `sync`
table.failures.ignore	If you want queries for your table to hang or fail when data is missing from the system, then set this to false. When this set to true missing data will be reported but queries will still run possibly returning a subset of the data. type: BOOLEAN, zk mutable: yes, default value: `false`
table.file.blocksize	Overrides the hadoop dfs.block.size setting so that files have better query performance. The maximum value for this is 2147483647 type: BYTES, zk mutable: yes, default value: `0B`
table.file.compress.blocksize	Similar to the hadoop io.seqfile.compress.blocksize setting, so that files have better query performance. The maximum value for this is 2147483647. (This setting is the size threshold prior to compression, and applies even compression is disabled.) type: BYTES, zk mutable: yes, default value: `100K`
table.file.compress.blocksize.index	Determines how large index blocks can be in files that support multilevel indexes. The maximum value for this is 2147483647. (This setting is the size threshold prior to compression, and applies even compression is disabled.) type: BYTES, zk mutable: yes, default value: `128K`
table.file.compress.type	One of gz,snappy,lzo,none type: STRING, zk mutable: yes, default value: `gz`
table.file.max	Determines the max # of files each tablet in a table can have. When adjusting this property you may want to consider adjusting table.compaction.major.ratio also. Setting this property to 0 will make it default to tserver.scan.files.open.max-1, this will prevent a tablet from having more files than can be opened. Setting this property low may throttle ingest and increase query performance. type: COUNT, zk mutable: yes, default value: `15`
table.file.replication	Determines how many replicas to keep of a tables’ files in HDFS. When this value is LTE 0, HDFS defaults are used. type: COUNT, zk mutable: yes, default value: `0`
table.file.summary.maxSize	The maximum size summary that will be stored. The number of files that had summary data exceeding this threshold is reported by Summary.getFileStatistics().getLarge(). When adjusting this consider the expected number files with summaries on each tablet server and the summary cache size. type: BYTES, zk mutable: yes, default value: `256K`
table.file.type	Change the type of file a table writes type: STRING, zk mutable: yes, default value: `rf`
table.formatter	The Formatter class to apply on results in the shell type: STRING, zk mutable: yes, default value: `org.apache.accumulo.core.util.format.DefaultFormatter`
table.group.*	Properties in this category are per-table properties that define locality groups in a table. These properties start with the category prefix, followed by a name, followed by a period, and followed by a property for that group. For example table.group.group1=x,y,z sets the column families for a group called group1. Once configured, group1 can be enabled by adding it to the list of groups in the table.groups.enabled property. Additional group options may be specified for a named group by setting table.group..opt.=.
table.groups.enabled	A comma separated list of locality group names to enable for this table. type: STRING, zk mutable: yes, default value: empty
table.interepreter	The ScanInterpreter class to apply on scan arguments in the shell type: STRING, zk mutable: yes, default value: `org.apache.accumulo.core.util.interpret.DefaultScanInterpreter`
table.iterator.*	Properties in this category specify iterators that are applied at various stages (scopes) of interaction with a table. These properties start with the category prefix, followed by a scope (minc, majc, scan, etc.), followed by a period, followed by a name, as in table.iterator.scan.vers, or table.iterator.scan.custom. The values for these properties are a number indicating the ordering in which it is applied, and a class name such as: table.iterator.scan.vers = 10,org.apache.accumulo.core.iterators.VersioningIterator These iterators can take options if additional properties are set that look like this property, but are suffixed with a period, followed by ‘opt’ followed by another period, and a property name. For example, table.iterator.minc.vers.opt.maxVersions = 3
table.iterator.majc.*	Convenience prefix to find options for the majc iterator scope
table.iterator.minc.*	Convenience prefix to find options for the minc iterator scope
table.iterator.scan.*	Convenience prefix to find options for the scan iterator scope
table.majc.compaction.strategy	A customizable major compaction strategy. type: CLASSNAME, zk mutable: yes, default value: `org.apache.accumulo.tserver.compaction.DefaultCompactionStrategy`
table.majc.compaction.strategy.opts.*	Properties in this category are used to configure the compaction strategy.
table.replication	Is replication enabled for the given table type: BOOLEAN, zk mutable: yes, default value: `false`
table.replication.target.*	Enumerate a mapping of other systems which this table should replicate their data to. The key suffix is the identifying cluster name and the value is an identifier for a location on the target system, e.g. the ID of the table on the target to replicate to
table.sampler	The name of a class that implements org.apache.accumulo.core.Sampler. Setting this option enables storing a sample of data which can be scanned. Always having a current sample can useful for query optimization and data comprehension. After enabling sampling for an existing table, a compaction is needed to compute the sample for existing data. The compact command in the shell has an option to only compact files without sample data. type: CLASSNAME, zk mutable: yes, default value: empty
table.sampler.opt.*	The property is used to set options for a sampler. If a sample had two options like hasher and modulous, then the two properties table.sampler.opt.hasher=${hash algorithm} and table.sampler.opt.modulous=${mod} would be set.
table.scan.max.memory	The maximum amount of memory that will be used to cache results of a client query/scan. Once this limit is reached, the buffered data is sent to the client. type: BYTES, zk mutable: yes, default value: `512K`
table.security.scan.visibility.default	The security label that will be assumed at scan time if an entry does not have a visibility set. Note: An empty security label is displayed as []. The scan results will show an empty visibility even if the visibility from this setting is applied to the entry. CAUTION: If a particular key has an empty security label AND its table’s default visibility is also empty, access will ALWAYS be granted for users with permission to that table. Additionally, if this field is changed, all existing data with an empty visibility label will be interpreted with the new label on the next scan. type: STRING, zk mutable: yes, default value: empty
table.split.endrow.size.max	Maximum size of end row type: BYTES, zk mutable: yes, default value: `10K`
table.split.threshold	When combined size of files exceeds this amount a tablet is split. type: BYTES, zk mutable: yes, default value: `1G`
table.summarizer.*	Prefix for configuring summarizers for a table. Using this prefix multiple summarizers can be configured with options for each one. Each summarizer configured should have a unique id, this id can be anything. To add a summarizer set table.summarizer.=. If the summarizer has options, then for each option set table.summarizer..opt.=.
table.suspend.duration	For tablets belonging to this table: When a tablet server dies, allow the tablet server this duration to revive before reassigning its tabletsto other tablet servers. type: TIMEDURATION, zk mutable: yes, default value: `0s`
table.walog.enabled	Deprecated. ~~This setting is deprecated. Use table.durability=none instead.~~ type: BOOLEAN, zk mutable: yes, default value: `true`
trace.*	Properties in this category affect the behavior of distributed tracing.
trace.password	The password for the user used to store distributed traces type: STRING, zk mutable: no, default value: `secret`
trace.port.client	The listening port for the trace server type: PORT, zk mutable: no, default value: `12234`
trace.span.receiver.*	Prefix for span receiver configuration properties
trace.span.receivers	A list of span receiver classes to send trace spans type: CLASSNAMELIST, zk mutable: no, default value: `org.apache.accumulo.tracer.ZooTraceClient`
trace.table	The name of the table to store distributed traces type: STRING, zk mutable: no, default value: `trace`
trace.token.property.*	The prefix used to create a token for storing distributed traces. For each property required by trace.token.type, place this prefix in front of it.
trace.token.type	An AuthenticationToken type supported by the authorizer type: CLASSNAME, zk mutable: no, default value: `org.apache.accumulo.core.client.security.tokens.PasswordToken`
trace.user	The name of the user to store distributed traces type: STRING, zk mutable: no, default value: `root`
trace.zookeeper.path	The zookeeper node where tracers are registered type: STRING, zk mutable: no, default value: `/tracers`
tserver.*	Properties in this category affect the behavior of the tablet servers
tserver.archive.walogs	Keep copies of the WALOGs for debugging purposes type: BOOLEAN, zk mutable: yes, default value: `false`
tserver.assignment.concurrent.max	The number of threads available to load tablets. Recoveries are still performed serially. type: COUNT, zk mutable: yes, default value: `2`
tserver.assignment.duration.warning	The amount of time an assignment can run before the server will print a warning along with the current stack trace. Meant to help debug stuck assignments type: TIMEDURATION, zk mutable: yes, default value: `10m`
tserver.bloom.load.concurrent.max	The number of concurrent threads that will load bloom filters in the background. Setting this to zero will make bloom filters load in the foreground. type: COUNT, zk mutable: yes, default value: `4`
tserver.bulk.assign.threads	The master delegates bulk file processing and assignment to tablet servers. After the bulk file has been processed, the tablet server will assign the file to the appropriate tablets on all servers. This property controls the number of threads used to communicate to the other servers. type: COUNT, zk mutable: yes, default value: `1`
tserver.bulk.process.threads	The master will task a tablet server with pre-processing a bulk file prior to assigning it to the appropriate tablet servers. This configuration value controls the number of threads used to process the files. type: COUNT, zk mutable: yes, default value: `1`
tserver.bulk.retry.max	The number of times the tablet server will attempt to assign a file to a tablet as it migrates and splits. type: COUNT, zk mutable: yes, default value: `5`
tserver.bulk.timeout	The time to wait for a tablet server to process a bulk import request. type: TIMEDURATION, zk mutable: yes, default value: `5m`
tserver.cache.data.size	Specifies the size of the cache for file data blocks. type: MEMORY, zk mutable: yes, default value: `10%`
tserver.cache.index.size	Specifies the size of the cache for file indices. type: MEMORY, zk mutable: yes, default value: `25%`
tserver.cache.policy	Specifies the eviction policy of the file data caches (LRU or TinyLFU). type: STRING, zk mutable: yes, default value: `LRU`
tserver.cache.summary.size	Specifies the size of the cache for summary data on each tablet server. type: MEMORY, zk mutable: yes, default value: `10%`
tserver.client.timeout	Time to wait for clients to continue scans before closing a session. type: TIMEDURATION, zk mutable: yes, default value: `3s`
tserver.compaction.major.concurrent.max	The maximum number of concurrent major compactions for a tablet server type: COUNT, zk mutable: yes, default value: `3`
tserver.compaction.major.delay	Time a tablet server will sleep between checking which tablets need compaction. type: TIMEDURATION, zk mutable: yes, default value: `30s`
tserver.compaction.major.thread.files.open.max	Max number of files a major compaction thread can open at once. type: COUNT, zk mutable: yes, default value: `10`
tserver.compaction.major.throughput	Maximum number of bytes to read or write per second over all major compactions on a TabletServer, or 0B for unlimited. type: BYTES, zk mutable: yes, default value: `0B`
tserver.compaction.major.trace.percent	The percent of major compactions to trace type: FRACTION, zk mutable: yes, default value: `0.1`
tserver.compaction.minor.concurrent.max	The maximum number of concurrent minor compactions for a tablet server type: COUNT, zk mutable: yes, default value: `4`
tserver.compaction.minor.trace.percent	The percent of minor compactions to trace type: FRACTION, zk mutable: yes, default value: `0.1`
tserver.compaction.warn.time	When a compaction has not made progress for this time period, a warning will be logged type: TIMEDURATION, zk mutable: yes, default value: `10m`
tserver.default.blocksize	Specifies a default blocksize for the tserver caches type: BYTES, zk mutable: yes, default value: `1M`
tserver.dir.memdump	A long running scan could possibly hold memory that has been minor compacted. To prevent this, the in memory map is dumped to a local file and the scan is switched to that local file. We can not switch to the minor compacted file because it may have been modified by iterators. The file dumped to the local dir is an exact copy of what was in memory. type: PATH, zk mutable: yes, default value: `/tmp`
tserver.files.open.idle	Tablet servers leave previously used files open for future queries. This setting determines how much time an unused file should be kept open until it is closed. type: TIMEDURATION, zk mutable: yes, default value: `1m`
tserver.hold.time