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Posted to commits@accumulo.apache.org by bu...@apache.org on 2015/05/18 06:27:54 UTC

svn commit: r951681 [2/9] - in /websites/staging/accumulo/trunk/content: ./ 1.7/ 1.7/examples/

Added: websites/staging/accumulo/trunk/content/1.7/accumulo_user_manual.html
==============================================================================
--- websites/staging/accumulo/trunk/content/1.7/accumulo_user_manual.html (added)
+++ websites/staging/accumulo/trunk/content/1.7/accumulo_user_manual.html Mon May 18 04:27:53 2015
@@ -0,0 +1,10923 @@
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+<body class="book toc2 toc-left">
+<div id="header">
+<h1>Apache Accumulo User Manual Version 1.7</h1>
+<div class="details">
+<span id="author" class="author">Apache Accumulo Project</span><br>
+<span id="email" class="email"><a href="mailto:dev@accumulo.apache.org">dev@accumulo.apache.org</a></span><br>
+</div>
+<div id="toc" class="toc2">
+<div id="toctitle">Apache Accumulo 1.7</div>
+<ul class="sectlevel1">
+<li><a href="#_introduction">1. Introduction</a></li>
+<li><a href="#_accumulo_design">2. Accumulo Design</a>
+<ul class="sectlevel2">
+<li><a href="#_data_model">2.1. Data Model</a></li>
+<li><a href="#_architecture">2.2. Architecture</a></li>
+<li><a href="#_components">2.3. Components</a>
+<ul class="sectlevel3">
+<li><a href="#_tablet_server">2.3.1. Tablet Server</a></li>
+<li><a href="#_garbage_collector">2.3.2. Garbage Collector</a></li>
+<li><a href="#_master">2.3.3. Master</a></li>
+<li><a href="#_tracer">2.3.4. Tracer</a></li>
+<li><a href="#_monitor">2.3.5. Monitor</a></li>
+<li><a href="#_client">2.3.6. Client</a></li>
+</ul>
+</li>
+<li><a href="#_data_management">2.4. Data Management</a></li>
+<li><a href="#_tablet_service">2.5. Tablet Service</a></li>
+<li><a href="#_compactions">2.6. Compactions</a></li>
+<li><a href="#_splitting">2.7. Splitting</a></li>
+<li><a href="#_fault_tolerance">2.8. Fault-Tolerance</a></li>
+</ul>
+</li>
+<li><a href="#_accumulo_shell">3. Accumulo Shell</a>
+<ul class="sectlevel2">
+<li><a href="#_basic_administration">3.1. Basic Administration</a></li>
+<li><a href="#_table_maintenance">3.2. Table Maintenance</a></li>
+<li><a href="#_user_administration">3.3. User Administration</a></li>
+</ul>
+</li>
+<li><a href="#_writing_accumulo_clients">4. Writing Accumulo Clients</a>
+<ul class="sectlevel2">
+<li><a href="#_running_client_code">4.1. Running Client Code</a></li>
+<li><a href="#_connecting">4.2. Connecting</a></li>
+<li><a href="#_writing_data">4.3. Writing Data</a>
+<ul class="sectlevel3">
+<li><a href="#_batchwriter">4.3.1. BatchWriter</a></li>
+<li><a href="#_conditionalwriter">4.3.2. ConditionalWriter</a></li>
+<li><a href="#_durability">4.3.3. Durability</a></li>
+</ul>
+</li>
+<li><a href="#_reading_data">4.4. Reading Data</a>
+<ul class="sectlevel3">
+<li><a href="#_scanner">4.4.1. Scanner</a></li>
+<li><a href="#_isolated_scanner">4.4.2. Isolated Scanner</a></li>
+<li><a href="#_batchscanner">4.4.3. BatchScanner</a></li>
+</ul>
+</li>
+<li><a href="#_proxy">4.5. Proxy</a>
+<ul class="sectlevel3">
+<li><a href="#_prequisites">4.5.1. Prequisites</a></li>
+<li><a href="#_configuration">4.5.2. Configuration</a></li>
+<li><a href="#_running_the_proxy_server">4.5.3. Running the Proxy Server</a></li>
+<li><a href="#_creating_a_proxy_client">4.5.4. Creating a Proxy Client</a></li>
+<li><a href="#_using_a_proxy_client">4.5.5. Using a Proxy Client</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_development_clients">5. Development Clients</a>
+<ul class="sectlevel2">
+<li><a href="#_mock_accumulo">5.1. Mock Accumulo</a></li>
+<li><a href="#_mini_accumulo_cluster">5.2. Mini Accumulo Cluster</a></li>
+</ul>
+</li>
+<li><a href="#_table_configuration">6. Table Configuration</a>
+<ul class="sectlevel2">
+<li><a href="#_locality_groups">6.1. Locality Groups</a>
+<ul class="sectlevel3">
+<li><a href="#_managing_locality_groups_via_the_shell">6.1.1. Managing Locality Groups via the Shell</a></li>
+<li><a href="#_managing_locality_groups_via_the_client_api">6.1.2. Managing Locality Groups via the Client API</a></li>
+</ul>
+</li>
+<li><a href="#_constraints">6.2. Constraints</a></li>
+<li><a href="#_bloom_filters">6.3. Bloom Filters</a></li>
+<li><a href="#_iterators">6.4. Iterators</a>
+<ul class="sectlevel3">
+<li><a href="#_setting_iterators_via_the_shell">6.4.1. Setting Iterators via the Shell</a></li>
+<li><a href="#_setting_iterators_programmatically">6.4.2. Setting Iterators Programmatically</a></li>
+<li><a href="#_versioning_iterators_and_timestamps">6.4.3. Versioning Iterators and Timestamps</a>
+<ul class="sectlevel4">
+<li><a href="#_logical_time">Logical Time</a></li>
+<li><a href="#_deletes">Deletes</a></li>
+</ul>
+</li>
+<li><a href="#_filters">6.4.4. Filters</a></li>
+<li><a href="#_combiners">6.4.5. Combiners</a></li>
+</ul>
+</li>
+<li><a href="#_block_cache">6.5. Block Cache</a></li>
+<li><a href="#_compaction">6.6. Compaction</a></li>
+<li><a href="#_pre_splitting_tables">6.7. Pre-splitting tables</a></li>
+<li><a href="#_merging_tablets">6.8. Merging tablets</a></li>
+<li><a href="#_delete_range">6.9. Delete Range</a></li>
+<li><a href="#_cloning_tables">6.10. Cloning Tables</a></li>
+<li><a href="#_exporting_tables">6.11. Exporting Tables</a></li>
+</ul>
+</li>
+<li><a href="#_iterator_design">7. Iterator Design</a>
+<ul class="sectlevel2">
+<li><a href="#_instantiation">7.1. Instantiation</a></li>
+<li><a href="#_interface">7.2. Interface</a>
+<ul class="sectlevel3">
+<li><a href="#__code_init_code">7.2.1. <code>init</code></a></li>
+<li><a href="#__code_seek_code">7.2.2. <code>seek</code></a></li>
+<li><a href="#__code_next_code">7.2.3. <code>next</code></a></li>
+<li><a href="#__code_hastop_code">7.2.4. <code>hasTop</code></a></li>
+<li><a href="#__code_gettopkey_code_and_code_gettopvalue_code">7.2.5. <code>getTopKey</code> and <code>getTopValue</code></a></li>
+<li><a href="#__code_deepcopy_code">7.2.6. <code>deepCopy</code></a></li>
+</ul>
+</li>
+<li><a href="#_tabletserver_invocation_of_iterators">7.3. TabletServer invocation of Iterators</a></li>
+<li><a href="#_isolation">7.4. Isolation</a></li>
+<li><a href="#_abstract_iterators">7.5. Abstract Iterators</a>
+<ul class="sectlevel3">
+<li><a href="#_filter">7.5.1. Filter</a></li>
+<li><a href="#_combiner">7.5.2. Combiner</a></li>
+</ul>
+</li>
+<li><a href="#_best_practices">7.6. Best practices</a>
+<ul class="sectlevel3">
+<li><a href="#_avoid_special_logic_encoded_in_ranges">7.6.1. Avoid special logic encoded in Ranges</a></li>
+<li><a href="#__code_seek_code_ing_backwards">7.6.2. <code>seek</code>'ing backwards</a></li>
+<li><a href="#_take_caution_in_constructing_new_data_in_an_iterator">7.6.3. Take caution in constructing new data in an Iterator</a></li>
+</ul>
+</li>
+<li><a href="#_final_things_to_remember">7.7. Final things to remember</a>
+<ul class="sectlevel3">
+<li><a href="#_method_call_order">7.7.1. Method call order</a></li>
+<li><a href="#_teardown">7.7.2. Teardown</a></li>
+</ul>
+</li>
+<li><a href="#_compaction_time_iterators">7.8. Compaction-time Iterators</a></li>
+</ul>
+</li>
+<li><a href="#_table_design">8. Table Design</a>
+<ul class="sectlevel2">
+<li><a href="#_basic_table">8.1. Basic Table</a></li>
+<li><a href="#_rowid_design">8.2. RowID Design</a></li>
+<li><a href="#_lexicoders">8.3. Lexicoders</a></li>
+<li><a href="#_indexing">8.4. Indexing</a></li>
+<li><a href="#_entity_attribute_and_graph_tables">8.5. Entity-Attribute and Graph Tables</a></li>
+<li><a href="#_document_partitioned_indexing">8.6. Document-Partitioned Indexing</a></li>
+</ul>
+</li>
+<li><a href="#_high_speed_ingest">9. High-Speed Ingest</a>
+<ul class="sectlevel2">
+<li><a href="#_pre_splitting_new_tables">9.1. Pre-Splitting New Tables</a></li>
+<li><a href="#_multiple_ingester_clients">9.2. Multiple Ingester Clients</a></li>
+<li><a href="#_bulk_ingest">9.3. Bulk Ingest</a></li>
+<li><a href="#_logical_time_for_bulk_ingest">9.4. Logical Time for Bulk Ingest</a></li>
+<li><a href="#_mapreduce_ingest">9.5. MapReduce Ingest</a></li>
+</ul>
+</li>
+<li><a href="#_analytics">10. Analytics</a>
+<ul class="sectlevel2">
+<li><a href="#_mapreduce">10.1. MapReduce</a>
+<ul class="sectlevel3">
+<li><a href="#_mapper_and_reducer_classes">10.1.1. Mapper and Reducer classes</a></li>
+<li><a href="#_accumuloinputformat_options">10.1.2. AccumuloInputFormat options</a></li>
+<li><a href="#_accumulomultitableinputformat_options">10.1.3. AccumuloMultiTableInputFormat options</a></li>
+<li><a href="#_accumulooutputformat_options">10.1.4. AccumuloOutputFormat options</a></li>
+</ul>
+</li>
+<li><a href="#_combiners_2">10.2. Combiners</a>
+<ul class="sectlevel3">
+<li><a href="#_feature_vectors">10.2.1. Feature Vectors</a></li>
+</ul>
+</li>
+<li><a href="#_statistical_modeling">10.3. Statistical Modeling</a></li>
+</ul>
+</li>
+<li><a href="#_security">11. Security</a>
+<ul class="sectlevel2">
+<li><a href="#_security_label_expressions">11.1. Security Label Expressions</a></li>
+<li><a href="#_security_label_expression_syntax">11.2. Security Label Expression Syntax</a></li>
+<li><a href="#_authorization">11.3. Authorization</a></li>
+<li><a href="#_user_authorizations">11.4. User Authorizations</a></li>
+<li><a href="#_pluggable_security">11.5. Pluggable Security</a></li>
+<li><a href="#_secure_authorizations_handling">11.6. Secure Authorizations Handling</a></li>
+<li><a href="#_query_services_layer">11.7. Query Services Layer</a></li>
+</ul>
+</li>
+<li><a href="#_replication">12. Replication</a>
+<ul class="sectlevel2">
+<li><a href="#_overview">12.1. Overview</a></li>
+<li><a href="#_configuration_2">12.2. Configuration</a>
+<ul class="sectlevel3">
+<li><a href="#_site_configuration">12.2.1. Site Configuration</a></li>
+<li><a href="#_instance_configuration">12.2.2. Instance Configuration</a></li>
+<li><a href="#_table_configuration_2">12.2.3. Table Configuration</a></li>
+</ul>
+</li>
+<li><a href="#_monitoring">12.3. Monitoring</a></li>
+<li><a href="#_work_assignment">12.4. Work Assignment</a></li>
+<li><a href="#_replicasystems">12.5. ReplicaSystems</a>
+<ul class="sectlevel3">
+<li><a href="#_accumuloreplicasystem">12.5.1. AccumuloReplicaSystem</a></li>
+</ul>
+</li>
+<li><a href="#_other_configuration">12.6. Other Configuration</a></li>
+<li><a href="#_example_practical_configuration">12.7. Example Practical Configuration</a>
+<ul class="sectlevel3">
+<li><a href="#_conf_accumulo_site_xml">12.7.1. conf/accumulo-site.xml</a>
+<ul class="sectlevel4">
+<li><a href="#_primary">Primary</a></li>
+<li><a href="#_peer">Peer</a></li>
+</ul>
+</li>
+<li><a href="#_conf_masters_and_conf_slaves">12.7.2. conf/masters and conf/slaves</a></li>
+<li><a href="#_start_both_instances">12.7.3. Start both instances</a></li>
+<li><a href="#_peer_2">12.7.4. Peer</a></li>
+<li><a href="#_primary_2">12.7.5. Primary</a>
+<ul class="sectlevel4">
+<li><a href="#_set_up_the_table">Set up the table</a></li>
+<li><a href="#_define_the_peer_as_a_replication_peer_to_the_primary">Define the Peer as a replication peer to the Primary</a></li>
+<li><a href="#_set_the_authentication_credentials">Set the authentication credentials</a></li>
+<li><a href="#_enable_replication_on_the_table">Enable replication on the table</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_extra_considerations_for_use">12.8. Extra considerations for use</a>
+<ul class="sectlevel3">
+<li><a href="#_latency">12.8.1. Latency</a></li>
+<li><a href="#_table_configured_iterators">12.8.2. Table-Configured Iterators</a></li>
+<li><a href="#_duplicate_keys">12.8.3. Duplicate Keys</a></li>
+<li><a href="#_bulk_imports">12.8.4. Bulk Imports</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_implementation_details">13. Implementation Details</a>
+<ul class="sectlevel2">
+<li><a href="#_fault_tolerant_executor_fate">13.1. Fault-Tolerant Executor (FATE)</a></li>
+<li><a href="#_overview_2">13.2. Overview</a></li>
+<li><a href="#_administration">13.3. Administration</a>
+<ul class="sectlevel3">
+<li><a href="#_list_print">13.3.1. List/Print</a></li>
+<li><a href="#_fail">13.3.2. Fail</a></li>
+<li><a href="#_delete">13.3.3. Delete</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_ssl">14. SSL</a>
+<ul class="sectlevel2">
+<li><a href="#_server_configuration">14.1. Server configuration</a></li>
+<li><a href="#_client_configuration">14.2. Client configuration</a></li>
+<li><a href="#_generating_ssl_material_using_openssl">14.3. Generating SSL material using OpenSSL</a>
+<ul class="sectlevel3">
+<li><a href="#_generate_a_certificate_authority">14.3.1. Generate a certificate authority</a></li>
+<li><a href="#_generate_a_certificate_keystore_per_host">14.3.2. Generate a certificate/keystore per host</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_kerberos">15. Kerberos</a>
+<ul class="sectlevel2">
+<li><a href="#_overview_3">15.1. Overview</a></li>
+<li><a href="#_within_hadoop">15.2. Within Hadoop</a></li>
+<li><a href="#_delegation_tokens">15.3. Delegation Tokens</a></li>
+<li><a href="#_configuring_accumulo">15.4. Configuring Accumulo</a>
+<ul class="sectlevel3">
+<li><a href="#_servers">15.4.1. Servers</a>
+<ul class="sectlevel4">
+<li><a href="#_generate_principal_and_keytab">Generate Principal and Keytab</a></li>
+<li><a href="#_server_configuration_2">Server Configuration</a></li>
+<li><a href="#_kerberosauthenticator">KerberosAuthenticator</a></li>
+<li><a href="#_accumulo_initialization">Accumulo Initialization</a></li>
+<li><a href="#_verifying_secure_access">Verifying secure access</a></li>
+<li><a href="#_impersonation">Impersonation</a></li>
+<li><a href="#_delegation_tokens_2">Delegation Tokens</a></li>
+</ul>
+</li>
+<li><a href="#_clients">15.4.2. Clients</a>
+<ul class="sectlevel4">
+<li><a href="#_create_client_principal">Create client principal</a></li>
+<li><a href="#_configuration_3">Configuration</a></li>
+<li><a href="#_delegationtokens_with_mapreduce">DelegationTokens with MapReduce</a></li>
+</ul>
+</li>
+<li><a href="#_debugging">15.4.3. Debugging</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_administration_2">16. Administration</a>
+<ul class="sectlevel2">
+<li><a href="#_hardware">16.1. Hardware</a></li>
+<li><a href="#_network">16.2. Network</a></li>
+<li><a href="#_installation">16.3. Installation</a></li>
+<li><a href="#_dependencies">16.4. Dependencies</a></li>
+<li><a href="#_configuration_4">16.5. Configuration</a>
+<ul class="sectlevel3">
+<li><a href="#_edit_conf_accumulo_env_sh">16.5.1. Edit conf/accumulo-env.sh</a></li>
+<li><a href="#_native_map">16.5.2. Native Map</a>
+<ul class="sectlevel4">
+<li><a href="#_building">Building</a></li>
+<li><a href="#_configuration_5">Configuration</a></li>
+</ul>
+</li>
+<li><a href="#_cluster_specification">16.5.3. Cluster Specification</a></li>
+<li><a href="#_accumulo_settings">16.5.4. Accumulo Settings</a></li>
+<li><a href="#_hostnames_in_configuration_files">16.5.5. Hostnames in configuration files</a></li>
+<li><a href="#_deploy_configuration">16.5.6. Deploy Configuration</a></li>
+<li><a href="#_sensitive_configuration_values">16.5.7. Sensitive Configuration Values</a></li>
+<li><a href="#_using_a_javakeystorecredentialprovider_for_storage">16.5.8. Using a JavaKeyStoreCredentialProvider for storage</a></li>
+<li><a href="#_custom_table_tags">16.5.9. Custom Table Tags</a></li>
+</ul>
+</li>
+<li><a href="#_initialization">16.6. Initialization</a></li>
+<li><a href="#_running">16.7. Running</a>
+<ul class="sectlevel3">
+<li><a href="#_starting_accumulo">16.7.1. Starting Accumulo</a></li>
+<li><a href="#_stopping_accumulo">16.7.2. Stopping Accumulo</a></li>
+<li><a href="#_adding_a_node">16.7.3. Adding a Node</a></li>
+<li><a href="#_decomissioning_a_node">16.7.4. Decomissioning a Node</a></li>
+<li><a href="#_restarting_process_on_a_node">16.7.5. Restarting process on a node</a></li>
+</ul>
+</li>
+<li><a href="#monitoring">16.8. Monitoring</a>
+<ul class="sectlevel3">
+<li><a href="#_accumulo_monitor">16.8.1. Accumulo Monitor</a></li>
+<li><a href="#_ssl_2">16.8.2. SSL</a></li>
+</ul>
+</li>
+<li><a href="#_metrics">16.9. Metrics</a>
+<ul class="sectlevel3">
+<li><a href="#_metrics2_configuration">16.9.1. Metrics2 Configuration</a></li>
+</ul>
+</li>
+<li><a href="#tracing">16.10. Tracing</a>
+<ul class="sectlevel3">
+<li><a href="#_tracers">16.10.1. Tracers</a></li>
+<li><a href="#_configuring_tracing">16.10.2. Configuring Tracing</a></li>
+<li><a href="#_instrumenting_a_client">16.10.3. Instrumenting a Client</a></li>
+<li><a href="#_viewing_collected_traces">16.10.4. Viewing Collected Traces</a></li>
+<li><a href="#_tracing_from_the_shell">16.10.5. Tracing from the Shell</a></li>
+</ul>
+</li>
+<li><a href="#_logging">16.11. Logging</a></li>
+<li><a href="#watcher">16.12. Watcher</a></li>
+<li><a href="#_recovery">16.13. Recovery</a></li>
+<li><a href="#_migrating_accumulo_from_non_ha_namenode_to_ha_namenode">16.14. Migrating Accumulo from non-HA Namenode to HA Namenode</a></li>
+<li><a href="#_achieving_stability_in_a_vm_environment">16.15. Achieving Stability in a VM Environment</a>
+<ul class="sectlevel3">
+<li><a href="#_known_failure_modes_setup_and_troubleshooting">16.15.1. Known failure modes: Setup and Troubleshooting</a>
+<ul class="sectlevel4">
+<li><a href="#_physical_memory">Physical Memory</a></li>
+<li><a href="#_disk_space">Disk Space</a></li>
+<li><a href="#_zookeeper_interaction">Zookeeper Interaction</a></li>
+</ul>
+</li>
+<li><a href="#_tested_versions">16.15.2. Tested Versions</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li><a href="#_multi_volume_installations">17. Multi-Volume Installations</a></li>
+<li><a href="#_troubleshooting">18. Troubleshooting</a>
+<ul class="sectlevel2">
+<li><a href="#_logs">18.1. Logs</a></li>
+<li><a href="#_monitor_2">18.2. Monitor</a></li>
+<li><a href="#_hdfs">18.3. HDFS</a></li>
+<li><a href="#_zookeeper">18.4. Zookeeper</a>
+<ul class="sectlevel3">
+<li><a href="#_keeping_the_tablet_server_lock">18.4.1. Keeping the tablet server lock</a></li>
+</ul>
+</li>
+<li><a href="#_tools">18.5. Tools</a></li>
+<li><a href="#metadata">18.6. System Metadata Tables</a></li>
+<li><a href="#_simple_system_recovery">18.7. Simple System Recovery</a></li>
+<li><a href="#_advanced_system_recovery">18.8. Advanced System Recovery</a>
+<ul class="sectlevel3">
+<li><a href="#_hdfs_failure">18.8.1. HDFS Failure</a></li>
+<li><a href="#zookeeper_failure">18.8.2. ZooKeeper Failure</a></li>
+</ul>
+</li>
+<li><a href="#_upgrade_issues">18.9. Upgrade Issues</a></li>
+<li><a href="#_file_naming_conventions">18.10. File Naming Conventions</a></li>
+</ul>
+</li>
+<li><a href="#configuration">Appendix A: Configuration Management</a>
+<ul class="sectlevel2">
+<li><a href="#_configuration_overview">A.1. Configuration Overview</a>
+<ul class="sectlevel3">
+<li><a href="#_zookeeper_table_properties">A.1.1. Zookeeper table properties</a></li>
+<li><a href="#_zookeeper_system_properties">A.1.2. Zookeeper system properties</a></li>
+<li><a href="#_accumulo_site_xml">A.1.3. accumulo-site.xml</a></li>
+<li><a href="#_default_values">A.1.4. Default Values</a></li>
+<li><a href="#_zookeeper_property_considerations">A.1.5. ZooKeeper Property Considerations</a></li>
+</ul>
+</li>
+<li><a href="#_configuration_in_the_shell">A.2. Configuration in the Shell</a></li>
+<li><a href="#_available_properties">A.3. Available Properties</a>
+<ul class="sectlevel3">
+<li><a href="#RPC_PREFIX">A.3.1. rpc.*</a>
+<ul class="sectlevel4">
+<li><a href="#_rpc_javax_net_ssl_keystore">rpc.javax.net.ssl.keyStore</a></li>
+<li><a href="#_rpc_javax_net_ssl_keystorepassword">rpc.javax.net.ssl.keyStorePassword</a></li>
+<li><a href="#_rpc_javax_net_ssl_keystoretype">rpc.javax.net.ssl.keyStoreType</a></li>
+<li><a href="#_rpc_javax_net_ssl_truststore">rpc.javax.net.ssl.trustStore</a></li>
+<li><a href="#_rpc_javax_net_ssl_truststorepassword">rpc.javax.net.ssl.trustStorePassword</a></li>
+<li><a href="#_rpc_javax_net_ssl_truststoretype">rpc.javax.net.ssl.trustStoreType</a></li>
+<li><a href="#_rpc_sasl_qop">rpc.sasl.qop</a></li>
+<li><a href="#_rpc_ssl_cipher_suites">rpc.ssl.cipher.suites</a></li>
+<li><a href="#_rpc_ssl_client_protocol">rpc.ssl.client.protocol</a></li>
+<li><a href="#_rpc_ssl_server_enabled_protocols">rpc.ssl.server.enabled.protocols</a></li>
+<li><a href="#_rpc_usejsse">rpc.useJsse</a></li>
+</ul>
+</li>
+<li><a href="#INSTANCE_PREFIX">A.3.2. instance.*</a>
+<ul class="sectlevel4">
+<li><a href="#_instance_dfs_dir">instance.dfs.dir</a></li>
+<li><a href="#_instance_dfs_uri">instance.dfs.uri</a></li>
+<li><a href="#_instance_rpc_sasl_enabled">instance.rpc.sasl.enabled</a></li>
+<li><a href="#_instance_rpc_ssl_clientauth">instance.rpc.ssl.clientAuth</a></li>
+<li><a href="#_instance_rpc_ssl_enabled">instance.rpc.ssl.enabled</a></li>
+<li><a href="#_instance_secret">instance.secret</a></li>
+<li><a href="#_instance_security_authenticator">instance.security.authenticator</a></li>
+<li><a href="#_instance_security_authorizor">instance.security.authorizor</a></li>
+<li><a href="#_instance_security_permissionhandler">instance.security.permissionHandler</a></li>
+<li><a href="#_instance_volumes">instance.volumes</a></li>
+<li><a href="#_instance_volumes_replacements">instance.volumes.replacements</a></li>
+<li><a href="#_instance_zookeeper_host">instance.zookeeper.host</a></li>
+<li><a href="#_instance_zookeeper_timeout">instance.zookeeper.timeout</a></li>
+</ul>
+</li>
+<li><a href="#INSTANCE_RPC_SASL_PROXYUSERS">A.3.3. instance.rpc.sasl.impersonation.*</a></li>
+<li><a href="#GENERAL_PREFIX">A.3.4. general.*</a>
+<ul class="sectlevel4">
+<li><a href="#_general_classpaths">general.classpaths</a></li>
+<li><a href="#_general_delegation_token_lifetime">general.delegation.token.lifetime</a></li>
+<li><a href="#_general_delegation_token_update_interval">general.delegation.token.update.interval</a></li>
+<li><a href="#_general_dynamic_classpaths">general.dynamic.classpaths</a></li>
+<li><a href="#_general_kerberos_keytab">general.kerberos.keytab</a></li>
+<li><a href="#_general_kerberos_principal">general.kerberos.principal</a></li>
+<li><a href="#_general_legacy_metrics">general.legacy.metrics</a></li>
+<li><a href="#_general_rpc_timeout">general.rpc.timeout</a></li>
+<li><a href="#_general_security_credential_provider_paths">general.security.credential.provider.paths</a></li>
+<li><a href="#_general_server_message_size_max">general.server.message.size.max</a></li>
+<li><a href="#_general_server_simpletimer_threadpool_size">general.server.simpletimer.threadpool.size</a></li>
+<li><a href="#_general_vfs_cache_dir">general.vfs.cache.dir</a></li>
+<li><a href="#_general_vfs_classpaths">general.vfs.classpaths</a></li>
+</ul>
+</li>
+<li><a href="#MASTER_PREFIX">A.3.5. master.*</a>
+<ul class="sectlevel4">
+<li><a href="#_master_bulk_rename_threadpool_size">master.bulk.rename.threadpool.size</a></li>
+<li><a href="#_master_bulk_retries">master.bulk.retries</a></li>
+<li><a href="#_master_bulk_threadpool_size">master.bulk.threadpool.size</a></li>
+<li><a href="#_master_bulk_timeout">master.bulk.timeout</a></li>
+<li><a href="#_master_fate_threadpool_size">master.fate.threadpool.size</a></li>
+<li><a href="#_master_lease_recovery_interval">master.lease.recovery.interval</a></li>
+<li><a href="#_master_port_client">master.port.client</a></li>
+<li><a href="#_master_recovery_delay">master.recovery.delay</a></li>
+<li><a href="#_master_recovery_max_age">master.recovery.max.age</a></li>
+<li><a href="#_master_recovery_time_max">master.recovery.time.max</a></li>
+<li><a href="#_master_replication_coordinator_minthreads">master.replication.coordinator.minthreads</a></li>
+<li><a href="#_master_replication_coordinator_port">master.replication.coordinator.port</a></li>
+<li><a href="#_master_replication_coordinator_threadcheck_time">master.replication.coordinator.threadcheck.time</a></li>
+<li><a href="#_master_replication_status_scan_interval">master.replication.status.scan.interval</a></li>
+<li><a href="#_master_server_threadcheck_time">master.server.threadcheck.time</a></li>
+<li><a href="#_master_server_threads_minimum">master.server.threads.minimum</a></li>
+<li><a href="#_master_tablet_balancer">master.tablet.balancer</a></li>
+<li><a href="#_master_walog_closer_implementation">master.walog.closer.implementation</a></li>
+</ul>
+</li>
+<li><a href="#TSERV_PREFIX">A.3.6. tserver.*</a>
+<ul class="sectlevel4">
+<li><a href="#_tserver_archive_walogs">tserver.archive.walogs</a></li>
+<li><a href="#_tserver_assignment_concurrent_max">tserver.assignment.concurrent.max</a></li>
+<li><a href="#_tserver_assignment_duration_warning">tserver.assignment.duration.warning</a></li>
+<li><a href="#_tserver_bloom_load_concurrent_max">tserver.bloom.load.concurrent.max</a></li>
+<li><a href="#_tserver_bulk_assign_threads">tserver.bulk.assign.threads</a></li>
+<li><a href="#_tserver_bulk_process_threads">tserver.bulk.process.threads</a></li>
+<li><a href="#_tserver_bulk_retry_max">tserver.bulk.retry.max</a></li>
+<li><a href="#_tserver_bulk_timeout">tserver.bulk.timeout</a></li>
+<li><a href="#_tserver_cache_data_size">tserver.cache.data.size</a></li>
+<li><a href="#_tserver_cache_index_size">tserver.cache.index.size</a></li>
+<li><a href="#_tserver_client_timeout">tserver.client.timeout</a></li>
+<li><a href="#_tserver_compaction_major_concurrent_max">tserver.compaction.major.concurrent.max</a></li>
+<li><a href="#_tserver_compaction_major_delay">tserver.compaction.major.delay</a></li>
+<li><a href="#_tserver_compaction_major_thread_files_open_max">tserver.compaction.major.thread.files.open.max</a></li>
+<li><a href="#_tserver_compaction_major_trace_percent">tserver.compaction.major.trace.percent</a></li>
+<li><a href="#_tserver_compaction_minor_concurrent_max">tserver.compaction.minor.concurrent.max</a></li>
+<li><a href="#_tserver_compaction_minor_trace_percent">tserver.compaction.minor.trace.percent</a></li>
+<li><a href="#_tserver_compaction_warn_time">tserver.compaction.warn.time</a></li>
+<li><a href="#_tserver_default_blocksize">tserver.default.blocksize</a></li>
+<li><a href="#_tserver_dir_memdump">tserver.dir.memdump</a></li>
+<li><a href="#_tserver_files_open_idle">tserver.files.open.idle</a></li>
+<li><a href="#_tserver_hold_time_max">tserver.hold.time.max</a></li>
+<li><a href="#_tserver_memory_manager">tserver.memory.manager</a></li>
+<li><a href="#_tserver_memory_maps_max">tserver.memory.maps.max</a></li>
+<li><a href="#_tserver_memory_maps_native_enabled">tserver.memory.maps.native.enabled</a></li>
+<li><a href="#_tserver_metadata_readahead_concurrent_max">tserver.metadata.readahead.concurrent.max</a></li>
+<li><a href="#_tserver_migrations_concurrent_max">tserver.migrations.concurrent.max</a></li>
+<li><a href="#_tserver_monitor_fs">tserver.monitor.fs</a></li>
+<li><a href="#_tserver_mutation_queue_max">tserver.mutation.queue.max</a></li>
+<li><a href="#_tserver_port_client">tserver.port.client</a></li>
+<li><a href="#_tserver_port_search">tserver.port.search</a></li>
+<li><a href="#_tserver_readahead_concurrent_max">tserver.readahead.concurrent.max</a></li>
+<li><a href="#_tserver_recovery_concurrent_max">tserver.recovery.concurrent.max</a></li>
+<li><a href="#_tserver_replication_batchwriter_replayer_memory">tserver.replication.batchwriter.replayer.memory</a></li>
+<li><a href="#_tserver_replication_default_replayer">tserver.replication.default.replayer</a></li>
+<li><a href="#_tserver_scan_files_open_max">tserver.scan.files.open.max</a></li>
+<li><a href="#_tserver_server_message_size_max">tserver.server.message.size.max</a></li>
+<li><a href="#_tserver_server_threadcheck_time">tserver.server.threadcheck.time</a></li>
+<li><a href="#_tserver_server_threads_minimum">tserver.server.threads.minimum</a></li>
+<li><a href="#_tserver_session_idle_max">tserver.session.idle.max</a></li>
+<li><a href="#_tserver_sort_buffer_size">tserver.sort.buffer.size</a></li>
+<li><a href="#_tserver_tablet_split_midpoint_files_max">tserver.tablet.split.midpoint.files.max</a></li>
+<li><a href="#_tserver_total_mutation_queue_max">tserver.total.mutation.queue.max</a></li>
+<li><a href="#_tserver_wal_blocksize">tserver.wal.blocksize</a></li>
+<li><a href="#_tserver_wal_replication">tserver.wal.replication</a></li>
+<li><a href="#_tserver_wal_sync">tserver.wal.sync</a></li>
+<li><a href="#_tserver_wal_sync_method">tserver.wal.sync.method</a></li>
+<li><a href="#_tserver_walog_max_size">tserver.walog.max.size</a></li>
+<li><a href="#_tserver_workq_threads">tserver.workq.threads</a></li>
+</ul>
+</li>
+<li><a href="#TSERV_REPLICATION_REPLAYERS">A.3.7. tserver.replication.replayer.*</a></li>
+<li><a href="#LOGGER_PREFIX">A.3.8. logger.*</a>
+<ul class="sectlevel4">
+<li><a href="#_logger_dir_walog">logger.dir.walog</a></li>
+</ul>
+</li>
+<li><a href="#GC_PREFIX">A.3.9. gc.*</a>
+<ul class="sectlevel4">
+<li><a href="#_gc_cycle_delay">gc.cycle.delay</a></li>
+<li><a href="#_gc_cycle_start">gc.cycle.start</a></li>
+<li><a href="#_gc_file_archive">gc.file.archive</a></li>
+<li><a href="#_gc_port_client">gc.port.client</a></li>
+<li><a href="#_gc_threads_delete">gc.threads.delete</a></li>
+<li><a href="#_gc_trace_percent">gc.trace.percent</a></li>
+<li><a href="#_gc_trash_ignore">gc.trash.ignore</a></li>
+</ul>
+</li>
+<li><a href="#MONITOR_PREFIX">A.3.10. monitor.*</a>
+<ul class="sectlevel4">
+<li><a href="#_monitor_banner_background">monitor.banner.background</a></li>
+<li><a href="#_monitor_banner_color">monitor.banner.color</a></li>
+<li><a href="#_monitor_banner_text">monitor.banner.text</a></li>
+<li><a href="#_monitor_lock_check_interval">monitor.lock.check.interval</a></li>
+<li><a href="#_monitor_log_date_format">monitor.log.date.format</a></li>
+<li><a href="#_monitor_port_client">monitor.port.client</a></li>
+<li><a href="#_monitor_port_log4j">monitor.port.log4j</a></li>
+<li><a href="#_monitor_ssl_exclude_ciphers">monitor.ssl.exclude.ciphers</a></li>
+<li><a href="#_monitor_ssl_include_ciphers">monitor.ssl.include.ciphers</a></li>
+<li><a href="#_monitor_ssl_include_protocols">monitor.ssl.include.protocols</a></li>
+<li><a href="#_monitor_ssl_keystore">monitor.ssl.keyStore</a></li>
+<li><a href="#_monitor_ssl_keystorepassword">monitor.ssl.keyStorePassword</a></li>
+<li><a href="#_monitor_ssl_keystoretype">monitor.ssl.keyStoreType</a></li>
+<li><a href="#_monitor_ssl_truststore">monitor.ssl.trustStore</a></li>
+<li><a href="#_monitor_ssl_truststorepassword">monitor.ssl.trustStorePassword</a></li>
+<li><a href="#_monitor_ssl_truststoretype">monitor.ssl.trustStoreType</a></li>
+</ul>
+</li>
+<li><a href="#TRACE_PREFIX">A.3.11. trace.*</a>
+<ul class="sectlevel4">
+<li><a href="#_trace_password">trace.password</a></li>
+<li><a href="#_trace_port_client">trace.port.client</a></li>
+<li><a href="#_trace_span_receivers">trace.span.receivers</a></li>
+<li><a href="#_trace_table">trace.table</a></li>
+<li><a href="#_trace_token_type">trace.token.type</a></li>
+<li><a href="#_trace_user">trace.user</a></li>
+<li><a href="#_trace_zookeeper_path">trace.zookeeper.path</a></li>
+</ul>
+</li>
+<li><a href="#TRACE_SPAN_RECEIVER_PREFIX">A.3.12. trace.span.receiver.*</a></li>
+<li><a href="#TRACE_TOKEN_PROPERTY_PREFIX">A.3.13. trace.token.property.*</a></li>
+<li><a href="#TABLE_PREFIX">A.3.14. table.*</a>
+<ul class="sectlevel4">
+<li><a href="#_table_balancer">table.balancer</a></li>
+<li><a href="#_table_bloom_enabled">table.bloom.enabled</a></li>
+<li><a href="#_table_bloom_error_rate">table.bloom.error.rate</a></li>
+<li><a href="#_table_bloom_hash_type">table.bloom.hash.type</a></li>
+<li><a href="#_table_bloom_key_functor">table.bloom.key.functor</a></li>
+<li><a href="#_table_bloom_load_threshold">table.bloom.load.threshold</a></li>
+<li><a href="#_table_bloom_size">table.bloom.size</a></li>
+<li><a href="#_table_cache_block_enable">table.cache.block.enable</a></li>
+<li><a href="#_table_cache_index_enable">table.cache.index.enable</a></li>
+<li><a href="#_table_classpath_context">table.classpath.context</a></li>
+<li><a href="#_table_compaction_major_everything_idle">table.compaction.major.everything.idle</a></li>
+<li><a href="#_table_compaction_major_ratio">table.compaction.major.ratio</a></li>
+<li><a href="#_table_compaction_minor_idle">table.compaction.minor.idle</a></li>
+<li><a href="#_table_compaction_minor_logs_threshold">table.compaction.minor.logs.threshold</a></li>
+<li><a href="#_table_durability">table.durability</a></li>
+<li><a href="#_table_failures_ignore">table.failures.ignore</a></li>
+<li><a href="#_table_file_blocksize">table.file.blocksize</a></li>
+<li><a href="#_table_file_compress_blocksize">table.file.compress.blocksize</a></li>
+<li><a href="#_table_file_compress_blocksize_index">table.file.compress.blocksize.index</a></li>
+<li><a href="#_table_file_compress_type">table.file.compress.type</a></li>
+<li><a href="#_table_file_max">table.file.max</a></li>
+<li><a href="#_table_file_replication">table.file.replication</a></li>
+<li><a href="#_table_file_type">table.file.type</a></li>
+<li><a href="#_table_formatter">table.formatter</a></li>
+<li><a href="#_table_groups_enabled">table.groups.enabled</a></li>
+<li><a href="#_table_interepreter">table.interepreter</a></li>
+<li><a href="#_table_majc_compaction_strategy">table.majc.compaction.strategy</a></li>
+<li><a href="#_table_replication">table.replication</a></li>
+<li><a href="#_table_scan_max_memory">table.scan.max.memory</a></li>
+<li><a href="#_table_security_scan_visibility_default">table.security.scan.visibility.default</a></li>
+<li><a href="#_table_split_endrow_size_max">table.split.endrow.size.max</a></li>
+<li><a href="#_table_split_threshold">table.split.threshold</a></li>
+<li><a href="#_table_walog_enabled">table.walog.enabled</a></li>
+</ul>
+</li>
+<li><a href="#TABLE_ARBITRARY_PROP_PREFIX">A.3.15. table.custom.*</a></li>
+<li><a href="#TABLE_CONSTRAINT_PREFIX">A.3.16. table.constraint.*</a></li>
+<li><a href="#TABLE_ITERATOR_PREFIX">A.3.17. table.iterator.*</a></li>
+<li><a href="#TABLE_ITERATOR_SCAN_PREFIX">A.3.18. table.iterator.scan.*</a></li>
+<li><a href="#TABLE_ITERATOR_MINC_PREFIX">A.3.19. table.iterator.minc.*</a></li>
+<li><a href="#TABLE_ITERATOR_MAJC_PREFIX">A.3.20. table.iterator.majc.*</a></li>
+<li><a href="#TABLE_LOCALITY_GROUP_PREFIX">A.3.21. table.group.*</a></li>
+<li><a href="#TABLE_COMPACTION_STRATEGY_PREFIX">A.3.22. table.majc.compaction.strategy.opts.*</a></li>
+<li><a href="#TABLE_REPLICATION_TARGET">A.3.23. table.replication.target.*</a></li>
+<li><a href="#VFS_CONTEXT_CLASSPATH_PROPERTY">A.3.24. general.vfs.context.classpath.*</a></li>
+<li><a href="#REPLICATION_PREFIX">A.3.25. replication.*</a>
+<ul class="sectlevel4">
+<li><a href="#_replication_driver_delay">replication.driver.delay</a></li>
+<li><a href="#_replication_max_unit_size">replication.max.unit.size</a></li>
+<li><a href="#_replication_max_work_queue">replication.max.work.queue</a></li>
+<li><a href="#_replication_name">replication.name</a></li>
+<li><a href="#_replication_receipt_service_port">replication.receipt.service.port</a></li>
+<li><a href="#_replication_receiver_min_threads">replication.receiver.min.threads</a></li>
+<li><a href="#_replication_receiver_threadcheck_time">replication.receiver.threadcheck.time</a></li>
+<li><a href="#_replication_trace_percent">replication.trace.percent</a></li>
+<li><a href="#_replication_work_assigner">replication.work.assigner</a></li>
+<li><a href="#_replication_work_assignment_sleep">replication.work.assignment.sleep</a></li>
+<li><a href="#_replication_work_attempts">replication.work.attempts</a></li>
+<li><a href="#_replication_work_processor_delay">replication.work.processor.delay</a></li>
+<li><a href="#_replication_work_processor_period">replication.work.processor.period</a></li>
+<li><a href="#_replication_worker_threads">replication.worker.threads</a></li>
+</ul>
+</li>
+<li><a href="#REPLICATION_PEERS">A.3.26. replication.peer.*</a></li>
+<li><a href="#REPLICATION_PEER_USER">A.3.27. replication.peer.user.*</a></li>
+<li><a href="#REPLICATION_PEER_PASSWORD">A.3.28. replication.peer.password.*</a></li>
+<li><a href="#REPLICATION_PEER_KEYTAB">A.3.29. replication.peer.keytab.*</a></li>
+</ul>
+</li>
+<li><a href="#_property_types">A.4. Property Types</a>
+<ul class="sectlevel3">
+<li><a href="#_duration">A.4.1. duration</a></li>
+<li><a href="#_date_time">A.4.2. date/time</a></li>
+<li><a href="#_memory">A.4.3. memory</a></li>
+<li><a href="#_host_list">A.4.4. host list</a></li>
+<li><a href="#_port">A.4.5. port</a></li>
+<li><a href="#_count">A.4.6. count</a></li>
+<li><a href="#_fraction_percentage">A.4.7. fraction/percentage</a></li>
+<li><a href="#_path">A.4.8. path</a></li>
+<li><a href="#_absolute_path">A.4.9. absolute path</a></li>
+<li><a href="#_java_class">A.4.10. java class</a></li>
+<li><a href="#_java_class_list">A.4.11. java class list</a></li>
+<li><a href="#_durability_2">A.4.12. durability</a></li>
+<li><a href="#_string">A.4.13. string</a></li>
+<li><a href="#_boolean">A.4.14. boolean</a></li>
+<li><a href="#_uri">A.4.15. uri</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="data:image/png;base64,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+</div>
+</div>
+<div class="paragraph">
+<p>Copyright © 2011-2014 The Apache Software Foundation, Licensed under the Apache
+License, Version 2.0.  Apache Accumulo, Accumulo, Apache, and the Apache
+Accumulo project logo are trademarks of the Apache Software Foundation.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_introduction">1. Introduction</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Apache Accumulo is a highly scalable structured store based on Google&#8217;s BigTable.
+Accumulo is written in Java and operates over the Hadoop Distributed File System
+(HDFS), which is part of the popular Apache Hadoop project. Accumulo supports
+efficient storage and retrieval of structured data, including queries for ranges, and
+provides support for using Accumulo tables as input and output for MapReduce
+jobs.</p>
+</div>
+<div class="paragraph">
+<p>Accumulo features automatic load-balancing and partitioning, data compression
+and fine-grained security labels.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_accumulo_design">2. Accumulo Design</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_data_model">2.1. Data Model</h3>
+<div class="paragraph">
+<p>Accumulo provides a richer data model than simple key-value stores, but is not a
+fully relational database. Data is represented as key-value pairs, where the key and
+value are comprised of the following elements:</p>
+</div>
+<table class="tableblock frame-all grid-all" style="width: 75%;">
+<colgroup>
+<col style="width: 16%;">
+<col style="width: 16%;">
+<col style="width: 16%;">
+<col style="width: 16%;">
+<col style="width: 16%;">
+<col style="width: 16%;">
+</colgroup>
+<tbody>
+<tr>
+<td class="tableblock halign-center valign-top" colspan="5"><p class="tableblock">Key</p></td>
+<td class="tableblock halign-center valign-middle" rowspan="3"><p class="tableblock">Value</p></td>
+</tr>
+<tr>
+<td class="tableblock halign-center valign-middle" rowspan="2"><p class="tableblock">Row ID</p></td>
+<td class="tableblock halign-center valign-top" colspan="3"><p class="tableblock">Column</p></td>
+<td class="tableblock halign-center valign-middle" rowspan="2"><p class="tableblock">Timestamp</p></td>
+</tr>
+<tr>
+<td class="tableblock halign-center valign-top"><p class="tableblock">Family</p></td>
+<td class="tableblock halign-center valign-top"><p class="tableblock">Qualifier</p></td>
+<td class="tableblock halign-center valign-top"><p class="tableblock">Visibility</p></td>
+</tr>
+</tbody>
+</table>
+<div class="paragraph">
+<p>All elements of the Key and the Value are represented as byte arrays except for
+Timestamp, which is a Long. Accumulo sorts keys by element and lexicographically
+in ascending order. Timestamps are sorted in descending order so that later
+versions of the same Key appear first in a sequential scan. Tables consist of a set of
+sorted key-value pairs.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_architecture">2.2. Architecture</h3>
+<div class="paragraph">
+<p>Accumulo is a distributed data storage and retrieval system and as such consists of
+several architectural components, some of which run on many individual servers.
+Much of the work Accumulo does involves maintaining certain properties of the
+data, such as organization, availability, and integrity, across many commodity-class
+machines.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_components">2.3. Components</h3>
+<div class="paragraph">
+<p>An instance of Accumulo includes many TabletServers, one Garbage Collector process,
+one Master server and many Clients.</p>
+</div>
+<div class="sect3">
+<h4 id="_tablet_server">2.3.1. Tablet Server</h4>
+<div class="paragraph">
+<p>The TabletServer manages some subset of all the tablets (partitions of tables). This includes receiving writes from clients, persisting writes to a
+write-ahead log, sorting new key-value pairs in memory, periodically
+flushing sorted key-value pairs to new files in HDFS, and responding
+to reads from clients, forming a merge-sorted view of all keys and
+values from all the files it has created and the sorted in-memory
+store.</p>
+</div>
+<div class="paragraph">
+<p>TabletServers also perform recovery of a tablet
+that was previously on a server that failed, reapplying any writes
+found in the write-ahead log to the tablet.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_garbage_collector">2.3.2. Garbage Collector</h4>
+<div class="paragraph">
+<p>Accumulo processes will share files stored in HDFS. Periodically, the Garbage
+Collector will identify files that are no longer needed by any process, and
+delete them. Multiple garbage collectors can be run to provide hot-standby support.
+They will perform leader election among themselves to choose a single active instance.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_master">2.3.3. Master</h4>
+<div class="paragraph">
+<p>The Accumulo Master is responsible for detecting and responding to TabletServer
+failure. It tries to balance the load across TabletServer by assigning tablets carefully
+and instructing TabletServers to unload tablets when necessary. The Master ensures all
+tablets are assigned to one TabletServer each, and handles table creation, alteration,
+and deletion requests from clients. The Master also coordinates startup, graceful
+shutdown and recovery of changes in write-ahead logs when Tablet servers fail.</p>
+</div>
+<div class="paragraph">
+<p>Multiple masters may be run. The masters will choose among themselves a single master,
+and the others will become backups if the master should fail.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_tracer">2.3.4. Tracer</h4>
+<div class="paragraph">
+<p>The Accumulo Tracer process supports the distributed timing API provided by Accumulo.
+One to many of these processes can be run on a cluster which will write the timing
+information to a given Accumulo table for future reference. Seeing the section on
+Tracing for more information on this support.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="_monitor">2.3.5. Monitor</h4>
+<div class="paragraph">
+<p>The Accumulo Monitor is a web application that provides a wealth of information about
+the state of an instance. The Monitor shows graphs and tables which contain information
+about read/write rates, cache hit/miss rates, and Accumulo table information such as scan
+rate and active/queued compactions. Additionally, the Monitor should always be the first
+point of entry when attempting to debug an Accumulo problem as it will show high-level problems
+in addition to aggregated errors from all nodes in the cluster. See the section on <a href="#monitoring">Monitoring</a>
+for more information.</p>
+</div>
+<div class="paragraph">
+<p>Multiple Monitors can be run to provide hot-standby support in the face of failure. Due to the

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