241 lines
7.7 KiB
C++
241 lines
7.7 KiB
C++
/*
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* Knobs.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FDBCLIENT_KNOBS_H
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#define FDBCLIENT_KNOBS_H
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#pragma once
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#include "flow/Knobs.h"
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#include "flow/flow.h"
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class ClientKnobs : public Knobs {
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public:
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int TOO_MANY; // FIXME: this should really be split up so we can control these more specifically
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double SYSTEM_MONITOR_INTERVAL;
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double NETWORK_BUSYNESS_MONITOR_INTERVAL; // The interval in which we should update the network busyness metric
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double FAILURE_MAX_DELAY;
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double FAILURE_MIN_DELAY;
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double FAILURE_TIMEOUT_DELAY;
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double CLIENT_FAILURE_TIMEOUT_DELAY;
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double FAILURE_EMERGENCY_DELAY;
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double FAILURE_MAX_GENERATIONS;
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double RECOVERY_DELAY_START_GENERATION;
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double RECOVERY_DELAY_SECONDS_PER_GENERATION;
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double MAX_GENERATIONS;
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double MAX_GENERATIONS_OVERRIDE;
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double MAX_GENERATIONS_SIM;
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double COORDINATOR_RECONNECTION_DELAY;
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int CLIENT_EXAMPLE_AMOUNT;
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double MAX_CLIENT_STATUS_AGE;
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int MAX_COMMIT_PROXY_CONNECTIONS;
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int MAX_GRV_PROXY_CONNECTIONS;
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double STATUS_IDLE_TIMEOUT;
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// wrong_shard_server sometimes comes from the only nonfailed server, so we need to avoid a fast spin
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double WRONG_SHARD_SERVER_DELAY; // SOMEDAY: This delay can limit performance of retrieving data when the cache is
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// mostly wrong (e.g. dumping the database after a test)
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double FUTURE_VERSION_RETRY_DELAY;
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int REPLY_BYTE_LIMIT;
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double DEFAULT_BACKOFF;
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double DEFAULT_MAX_BACKOFF;
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double BACKOFF_GROWTH_RATE;
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double RESOURCE_CONSTRAINED_MAX_BACKOFF;
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int PROXY_COMMIT_OVERHEAD_BYTES;
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double SHARD_STAT_SMOOTH_AMOUNT;
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int INIT_MID_SHARD_BYTES;
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int TRANSACTION_SIZE_LIMIT;
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int64_t KEY_SIZE_LIMIT;
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int64_t SYSTEM_KEY_SIZE_LIMIT;
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int64_t VALUE_SIZE_LIMIT;
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int64_t SPLIT_KEY_SIZE_LIMIT;
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int METADATA_VERSION_CACHE_SIZE;
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int MAX_BATCH_SIZE;
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double GRV_BATCH_TIMEOUT;
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int BROADCAST_BATCH_SIZE;
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double TRANSACTION_TIMEOUT_DELAY_INTERVAL;
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// When locationCache in DatabaseContext gets to be this size, items will be evicted
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int LOCATION_CACHE_EVICTION_SIZE;
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int LOCATION_CACHE_EVICTION_SIZE_SIM;
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int GET_RANGE_SHARD_LIMIT;
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int WARM_RANGE_SHARD_LIMIT;
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int STORAGE_METRICS_SHARD_LIMIT;
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int SHARD_COUNT_LIMIT;
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double STORAGE_METRICS_UNFAIR_SPLIT_LIMIT;
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double STORAGE_METRICS_TOO_MANY_SHARDS_DELAY;
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double AGGREGATE_HEALTH_METRICS_MAX_STALENESS;
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double DETAILED_HEALTH_METRICS_MAX_STALENESS;
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double MID_SHARD_SIZE_MAX_STALENESS;
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bool TAG_ENCODE_KEY_SERVERS;
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// KeyRangeMap
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int KRM_GET_RANGE_LIMIT;
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int KRM_GET_RANGE_LIMIT_BYTES; // This must be sufficiently larger than KEY_SIZE_LIMIT to ensure that at least two
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// entries will be returned from an attempt to read a key range map
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int DEFAULT_MAX_OUTSTANDING_WATCHES;
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int ABSOLUTE_MAX_WATCHES; // The client cannot set the max outstanding watches higher than this
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double WATCH_POLLING_TIME;
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double NO_RECENT_UPDATES_DURATION;
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double FAST_WATCH_TIMEOUT;
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double WATCH_TIMEOUT;
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double IS_ACCEPTABLE_DELAY;
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// Core
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int64_t CORE_VERSIONSPERSECOND; // This is defined within the server but used for knobs based on server value
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int LOG_RANGE_BLOCK_SIZE;
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int MUTATION_BLOCK_SIZE;
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// Taskbucket
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double TASKBUCKET_LOGGING_DELAY;
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int TASKBUCKET_MAX_PRIORITY;
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double TASKBUCKET_CHECK_TIMEOUT_CHANCE;
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double TASKBUCKET_TIMEOUT_JITTER_OFFSET;
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double TASKBUCKET_TIMEOUT_JITTER_RANGE;
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double TASKBUCKET_CHECK_ACTIVE_DELAY;
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int TASKBUCKET_CHECK_ACTIVE_AMOUNT;
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int TASKBUCKET_TIMEOUT_VERSIONS;
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int TASKBUCKET_MAX_TASK_KEYS;
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// Backup
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int BACKUP_LOCAL_FILE_WRITE_BLOCK;
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int BACKUP_CONCURRENT_DELETES;
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int BACKUP_SIMULATED_LIMIT_BYTES;
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int BACKUP_GET_RANGE_LIMIT_BYTES;
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int BACKUP_LOCK_BYTES;
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double BACKUP_RANGE_TIMEOUT;
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double BACKUP_RANGE_MINWAIT;
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int BACKUP_SNAPSHOT_DISPATCH_INTERVAL_SEC;
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int BACKUP_DEFAULT_SNAPSHOT_INTERVAL_SEC;
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int BACKUP_SHARD_TASK_LIMIT;
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double BACKUP_AGGREGATE_POLL_RATE;
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double BACKUP_AGGREGATE_POLL_RATE_UPDATE_INTERVAL;
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int BACKUP_LOG_WRITE_BATCH_MAX_SIZE;
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int BACKUP_LOG_ATOMIC_OPS_SIZE;
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int BACKUP_MAX_LOG_RANGES;
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int BACKUP_SIM_COPY_LOG_RANGES;
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int BACKUP_OPERATION_COST_OVERHEAD;
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int BACKUP_VERSION_DELAY;
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int BACKUP_MAP_KEY_LOWER_LIMIT;
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int BACKUP_MAP_KEY_UPPER_LIMIT;
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int BACKUP_COPY_TASKS;
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int BACKUP_BLOCK_SIZE;
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int COPY_LOG_BLOCK_SIZE;
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int COPY_LOG_BLOCKS_PER_TASK;
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int COPY_LOG_PREFETCH_BLOCKS;
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int COPY_LOG_READ_AHEAD_BYTES;
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double COPY_LOG_TASK_DURATION_NANOS;
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int BACKUP_TASKS_PER_AGENT;
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int BACKUP_POLL_PROGRESS_SECONDS;
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int64_t VERSIONS_PER_SECOND; // Copy of SERVER_KNOBS, as we can't link with it
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int SIM_BACKUP_TASKS_PER_AGENT;
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int BACKUP_RANGEFILE_BLOCK_SIZE;
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int BACKUP_LOGFILE_BLOCK_SIZE;
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int BACKUP_DISPATCH_ADDTASK_SIZE;
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int RESTORE_DISPATCH_ADDTASK_SIZE;
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int RESTORE_DISPATCH_BATCH_SIZE;
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int RESTORE_WRITE_TX_SIZE;
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int APPLY_MAX_LOCK_BYTES;
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int APPLY_MIN_LOCK_BYTES;
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int APPLY_BLOCK_SIZE;
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double APPLY_MAX_DECAY_RATE;
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double APPLY_MAX_INCREASE_FACTOR;
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double BACKUP_ERROR_DELAY;
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double BACKUP_STATUS_DELAY;
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double BACKUP_STATUS_JITTER;
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double MIN_CLEANUP_SECONDS;
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// Configuration
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int32_t DEFAULT_AUTO_COMMIT_PROXIES;
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int32_t DEFAULT_AUTO_GRV_PROXIES;
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int32_t DEFAULT_COMMIT_GRV_PROXIES_RATIO;
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int32_t DEFAULT_MAX_GRV_PROXIES;
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int32_t DEFAULT_AUTO_RESOLVERS;
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int32_t DEFAULT_AUTO_LOGS;
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// Client Status Info
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double CSI_SAMPLING_PROBABILITY;
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int64_t CSI_SIZE_LIMIT;
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double CSI_STATUS_DELAY;
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int HTTP_SEND_SIZE;
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int HTTP_READ_SIZE;
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int HTTP_VERBOSE_LEVEL;
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std::string HTTP_REQUEST_ID_HEADER;
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int BLOBSTORE_CONNECT_TRIES;
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int BLOBSTORE_CONNECT_TIMEOUT;
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int BLOBSTORE_MAX_CONNECTION_LIFE;
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int BLOBSTORE_REQUEST_TRIES;
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int BLOBSTORE_REQUEST_TIMEOUT_MIN;
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int BLOBSTORE_REQUESTS_PER_SECOND;
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int BLOBSTORE_LIST_REQUESTS_PER_SECOND;
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int BLOBSTORE_WRITE_REQUESTS_PER_SECOND;
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int BLOBSTORE_READ_REQUESTS_PER_SECOND;
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int BLOBSTORE_DELETE_REQUESTS_PER_SECOND;
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int BLOBSTORE_CONCURRENT_REQUESTS;
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int BLOBSTORE_MULTIPART_MAX_PART_SIZE;
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int BLOBSTORE_MULTIPART_MIN_PART_SIZE;
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int BLOBSTORE_CONCURRENT_UPLOADS;
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int BLOBSTORE_CONCURRENT_LISTS;
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int BLOBSTORE_CONCURRENT_WRITES_PER_FILE;
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int BLOBSTORE_CONCURRENT_READS_PER_FILE;
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int BLOBSTORE_READ_BLOCK_SIZE;
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int BLOBSTORE_READ_AHEAD_BLOCKS;
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int BLOBSTORE_READ_CACHE_BLOCKS_PER_FILE;
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int BLOBSTORE_MAX_SEND_BYTES_PER_SECOND;
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int BLOBSTORE_MAX_RECV_BYTES_PER_SECOND;
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int CONSISTENCY_CHECK_RATE_LIMIT_MAX;
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int CONSISTENCY_CHECK_ONE_ROUND_TARGET_COMPLETION_TIME;
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// fdbcli
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int CLI_CONNECT_PARALLELISM;
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double CLI_CONNECT_TIMEOUT;
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// trace
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int TRACE_LOG_FILE_IDENTIFIER_MAX_LENGTH;
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// transaction tags
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int MAX_TRANSACTION_TAG_LENGTH;
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int MAX_TAGS_PER_TRANSACTION;
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int COMMIT_SAMPLE_COST; // The expectation of sampling is every COMMIT_SAMPLE_COST sample once
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int WRITE_COST_BYTE_FACTOR;
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int INCOMPLETE_SHARD_PLUS; // The size of (possible) incomplete shard when estimate clear range
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double READ_TAG_SAMPLE_RATE; // Communicated to clients from cluster
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double TAG_THROTTLE_SMOOTHING_WINDOW;
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double TAG_THROTTLE_RECHECK_INTERVAL;
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double TAG_THROTTLE_EXPIRATION_INTERVAL;
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ClientKnobs();
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void initialize(bool randomize = false);
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};
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extern std::unique_ptr<ClientKnobs> globalClientKnobs;
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extern ClientKnobs const* CLIENT_KNOBS;
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#endif
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