foundationdb/fdbclient/Knobs.h

180 lines
5.4 KiB
C++

/*
* Knobs.h
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FDBCLIENT_KNOBS_H
#define FDBCLIENT_KNOBS_H
#pragma once
#include "flow/Knobs.h"
#include "flow/flow.h"
class ClientKnobs : public Knobs {
public:
int BYTE_LIMIT_UNLIMITED;
int ROW_LIMIT_UNLIMITED;
int TOO_MANY; // FIXME: this should really be split up so we can control these more specifically
double SYSTEM_MONITOR_INTERVAL;
double FAILURE_MAX_DELAY;
double FAILURE_MIN_DELAY;
double FAILURE_TIMEOUT_DELAY;
double CLIENT_FAILURE_TIMEOUT_DELAY;
// wrong_shard_server sometimes comes from the only nonfailed server, so we need to avoid a fast spin
double WRONG_SHARD_SERVER_DELAY; // SOMEDAY: This delay can limit performance of retrieving data when the cache is mostly wrong (e.g. dumping the database after a test)
double FUTURE_VERSION_RETRY_DELAY;
int REPLY_BYTE_LIMIT;
double DEFAULT_BACKOFF;
double DEFAULT_MAX_BACKOFF;
double BACKOFF_GROWTH_RATE;
int64_t TRANSACTION_SIZE_LIMIT;
int64_t KEY_SIZE_LIMIT;
int64_t SYSTEM_KEY_SIZE_LIMIT;
int64_t VALUE_SIZE_LIMIT;
int64_t SPLIT_KEY_SIZE_LIMIT;
int MAX_BATCH_SIZE;
double GRV_BATCH_TIMEOUT;
// When locationCache in DatabaseContext gets to be this size, items will be evicted
int LOCATION_CACHE_EVICTION_SIZE;
int LOCATION_CACHE_EVICTION_SIZE_SIM;
int GET_RANGE_SHARD_LIMIT;
int WARM_RANGE_SHARD_LIMIT;
int STORAGE_METRICS_SHARD_LIMIT;
double STORAGE_METRICS_UNFAIR_SPLIT_LIMIT;
double STORAGE_METRICS_TOO_MANY_SHARDS_DELAY;
//KeyRangeMap
int KRM_GET_RANGE_LIMIT;
int KRM_GET_RANGE_LIMIT_BYTES; //This must be sufficiently larger than KEY_SIZE_LIMIT to ensure that at least two entries will be returned from an attempt to read a key range map
int DEFAULT_MAX_OUTSTANDING_WATCHES;
int ABSOLUTE_MAX_WATCHES; //The client cannot set the max outstanding watches higher than this
double WATCH_POLLING_TIME;
double IS_ACCEPTABLE_DELAY;
// Core
int64_t CORE_VERSIONSPERSECOND; // This is defined within the server but used for knobs based on server value
int LOG_RANGE_BLOCK_SIZE;
int MUTATION_BLOCK_SIZE;
// Taskbucket
int TASKBUCKET_MAX_PRIORITY;
double TASKBUCKET_CHECK_TIMEOUT_CHANCE;
double TASKBUCKET_TIMEOUT_JITTER_OFFSET;
double TASKBUCKET_TIMEOUT_JITTER_RANGE;
double TASKBUCKET_CHECK_ACTIVE_DELAY;
int TASKBUCKET_CHECK_ACTIVE_AMOUNT;
int TASKBUCKET_TIMEOUT_VERSIONS;
int TASKBUCKET_MAX_TASK_KEYS;
// Backup
int BACKUP_CONCURRENT_DELETES;
int BACKUP_SIMULATED_LIMIT_BYTES;
int BACKUP_GET_RANGE_LIMIT_BYTES;
int BACKUP_LOCK_BYTES;
double BACKUP_RANGE_TIMEOUT;
double BACKUP_RANGE_MINWAIT;
int BACKUP_SNAPSHOT_DISPATCH_INTERVAL_SEC;
int BACKUP_DEFAULT_SNAPSHOT_INTERVAL_SEC;
int BACKUP_SHARD_TASK_LIMIT;
double BACKUP_AGGREGATE_POLL_RATE;
double BACKUP_AGGREGATE_POLL_RATE_UPDATE_INTERVAL;
int BACKUP_LOG_WRITE_BATCH_MAX_SIZE;
int BACKUP_LOG_ATOMIC_OPS_SIZE;
int BACKUP_MAX_LOG_RANGES;
int BACKUP_SIM_COPY_LOG_RANGES;
int BACKUP_OPERATION_COST_OVERHEAD;
int BACKUP_VERSION_DELAY;
int BACKUP_MAP_KEY_LOWER_LIMIT;
int BACKUP_MAP_KEY_UPPER_LIMIT;
int BACKUP_COPY_TASKS;
int BACKUP_BLOCK_SIZE;
int BACKUP_TASKS_PER_AGENT;
int CLEAR_LOG_RANGE_COUNT;
int SIM_BACKUP_TASKS_PER_AGENT;
int BACKUP_RANGEFILE_BLOCK_SIZE;
int BACKUP_LOGFILE_BLOCK_SIZE;
int BACKUP_DISPATCH_ADDTASK_SIZE;
int RESTORE_DISPATCH_ADDTASK_SIZE;
int RESTORE_DISPATCH_BATCH_SIZE;
int RESTORE_WRITE_TX_SIZE;
int APPLY_MAX_LOCK_BYTES;
int APPLY_MIN_LOCK_BYTES;
int APPLY_BLOCK_SIZE;
double APPLY_MAX_DECAY_RATE;
double APPLY_MAX_INCREASE_FACTOR;
double BACKUP_ERROR_DELAY;
double BACKUP_STATUS_DELAY;
double BACKUP_STATUS_JITTER;
// Configuration
int32_t DEFAULT_AUTO_PROXIES;
int32_t DEFAULT_AUTO_RESOLVERS;
int32_t DEFAULT_AUTO_LOGS;
// Client Status Info
double CSI_SAMPLING_PROBABILITY;
int64_t CSI_SIZE_LIMIT;
double CSI_STATUS_DELAY;
int HTTP_SEND_SIZE;
int HTTP_READ_SIZE;
int HTTP_VERBOSE_LEVEL;
int BLOBSTORE_CONNECT_TRIES;
int BLOBSTORE_CONNECT_TIMEOUT;
int BLOBSTORE_MAX_CONNECTION_LIFE;
int BLOBSTORE_REQUEST_TRIES;
int BLOBSTORE_REQUEST_TIMEOUT;
int BLOBSTORE_REQUESTS_PER_SECOND;
int BLOBSTORE_LIST_REQUESTS_PER_SECOND;
int BLOBSTORE_WRITE_REQUESTS_PER_SECOND;
int BLOBSTORE_READ_REQUESTS_PER_SECOND;
int BLOBSTORE_DELETE_REQUESTS_PER_SECOND;
int BLOBSTORE_CONCURRENT_REQUESTS;
int BLOBSTORE_MULTIPART_MAX_PART_SIZE;
int BLOBSTORE_MULTIPART_MIN_PART_SIZE;
int BLOBSTORE_CONCURRENT_UPLOADS;
int BLOBSTORE_CONCURRENT_LISTS;
int BLOBSTORE_CONCURRENT_WRITES_PER_FILE;
int BLOBSTORE_CONCURRENT_READS_PER_FILE;
int BLOBSTORE_READ_BLOCK_SIZE;
int BLOBSTORE_READ_AHEAD_BLOCKS;
int BLOBSTORE_READ_CACHE_BLOCKS_PER_FILE;
int BLOBSTORE_MAX_SEND_BYTES_PER_SECOND;
int BLOBSTORE_MAX_RECV_BYTES_PER_SECOND;
int CONSISTENCY_CHECK_RATE_LIMIT;
int CONSISTENCY_CHECK_RATE_WINDOW;
ClientKnobs(bool randomize = false);
};
extern ClientKnobs const* CLIENT_KNOBS;
#endif