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foundationdb/fdbclient/Knobs.cpp

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/*
* Knobs.cpp
*
* 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.
*/
#include "fdbclient/Knobs.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/SystemData.h"
#include "flow/UnitTest.h"
ClientKnobs const* CLIENT_KNOBS = new ClientKnobs();
#define init( knob, value ) initKnob( knob, value, #knob )
ClientKnobs::ClientKnobs() {
initialize();
}
void ClientKnobs::initialize(bool randomize) {
// clang-format off
init( TOO_MANY, 1000000 );
init( SYSTEM_MONITOR_INTERVAL, 5.0 );
init( FAILURE_MAX_DELAY, 5.0 );
init( FAILURE_MIN_DELAY, 4.0 ); if( randomize && BUGGIFY ) FAILURE_MIN_DELAY = 1.0;
init( FAILURE_TIMEOUT_DELAY, FAILURE_MIN_DELAY );
init( CLIENT_FAILURE_TIMEOUT_DELAY, FAILURE_MIN_DELAY );
init( FAILURE_EMERGENCY_DELAY, 30.0 );
init( FAILURE_MAX_GENERATIONS, 10 );
init( RECOVERY_DELAY_START_GENERATION, 70 );
init( RECOVERY_DELAY_SECONDS_PER_GENERATION, 60.0 );
init( MAX_GENERATIONS, 100 );
init( MAX_GENERATIONS_OVERRIDE, 0 );
init( COORDINATOR_RECONNECTION_DELAY, 1.0 );
init( CLIENT_EXAMPLE_AMOUNT, 20 );
init( MAX_CLIENT_STATUS_AGE, 1.0 );
init( MAX_COMMIT_PROXY_CONNECTIONS, 5 ); if( randomize && BUGGIFY ) MAX_COMMIT_PROXY_CONNECTIONS = 1;
init( MAX_GRV_PROXY_CONNECTIONS, 3 ); if( randomize && BUGGIFY ) MAX_GRV_PROXY_CONNECTIONS = 1;
init( STATUS_IDLE_TIMEOUT, 120.0 );
// wrong_shard_server sometimes comes from the only nonfailed server, so we need to avoid a fast spin
init( WRONG_SHARD_SERVER_DELAY, .01 ); if( randomize && BUGGIFY ) WRONG_SHARD_SERVER_DELAY = deterministicRandom()->random01(); // FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY; // SOMEDAY: This delay can limit performance of retrieving data when the cache is mostly wrong (e.g. dumping the database after a test)
init( FUTURE_VERSION_RETRY_DELAY, .01 ); if( randomize && BUGGIFY ) FUTURE_VERSION_RETRY_DELAY = deterministicRandom()->random01();// FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY;
init( REPLY_BYTE_LIMIT, 80000 );
init( DEFAULT_BACKOFF, .01 ); if( randomize && BUGGIFY ) DEFAULT_BACKOFF = deterministicRandom()->random01();
init( DEFAULT_MAX_BACKOFF, 1.0 );
init( BACKOFF_GROWTH_RATE, 2.0 );
init( RESOURCE_CONSTRAINED_MAX_BACKOFF, 30.0 );
init( PROXY_COMMIT_OVERHEAD_BYTES, 23 ); //The size of serializing 7 tags (3 primary, 3 remote, 1 log router) + 2 for the tag length
init( SHARD_STAT_SMOOTH_AMOUNT, 5.0 );
init( INIT_MID_SHARD_BYTES, 200000 ); if( randomize && BUGGIFY ) INIT_MID_SHARD_BYTES = 40000; // The same value as SERVER_KNOBS->MIN_SHARD_BYTES
init( TRANSACTION_SIZE_LIMIT, 1e7 );
init( KEY_SIZE_LIMIT, 1e4 );
init( SYSTEM_KEY_SIZE_LIMIT, 3e4 );
init( VALUE_SIZE_LIMIT, 1e5 );
init( SPLIT_KEY_SIZE_LIMIT, KEY_SIZE_LIMIT/2 ); if( randomize && BUGGIFY ) SPLIT_KEY_SIZE_LIMIT = KEY_SIZE_LIMIT - 31;//serverKeysPrefixFor(UID()).size() - 1;
init( METADATA_VERSION_CACHE_SIZE, 1000 );
init( MAX_BATCH_SIZE, 1000 ); if( randomize && BUGGIFY ) MAX_BATCH_SIZE = 1;
init( GRV_BATCH_TIMEOUT, 0.005 ); if( randomize && BUGGIFY ) GRV_BATCH_TIMEOUT = 0.1;
init( BROADCAST_BATCH_SIZE, 20 ); if( randomize && BUGGIFY ) BROADCAST_BATCH_SIZE = 1;
init( TRANSACTION_TIMEOUT_DELAY_INTERVAL, 10.0 ); if( randomize && BUGGIFY ) TRANSACTION_TIMEOUT_DELAY_INTERVAL = 1.0;
init( LOCATION_CACHE_EVICTION_SIZE, 600000 );
init( LOCATION_CACHE_EVICTION_SIZE_SIM, 10 ); if( randomize && BUGGIFY ) LOCATION_CACHE_EVICTION_SIZE_SIM = 3;
init( GET_RANGE_SHARD_LIMIT, 2 );
init( WARM_RANGE_SHARD_LIMIT, 100 );
init( STORAGE_METRICS_SHARD_LIMIT, 100 ); if( randomize && BUGGIFY ) STORAGE_METRICS_SHARD_LIMIT = 3;
init( SHARD_COUNT_LIMIT, 80 ); if( randomize && BUGGIFY ) SHARD_COUNT_LIMIT = 3;
init( STORAGE_METRICS_UNFAIR_SPLIT_LIMIT, 2.0/3.0 );
init( STORAGE_METRICS_TOO_MANY_SHARDS_DELAY, 15.0 );
init( AGGREGATE_HEALTH_METRICS_MAX_STALENESS, 0.5 );
init( DETAILED_HEALTH_METRICS_MAX_STALENESS, 5.0 );
init( MID_SHARD_SIZE_MAX_STALENESS, 10.0 );
init( TAG_ENCODE_KEY_SERVERS, false ); if( randomize && BUGGIFY ) TAG_ENCODE_KEY_SERVERS = true;
//KeyRangeMap
init( KRM_GET_RANGE_LIMIT, 1e5 ); if( randomize && BUGGIFY ) KRM_GET_RANGE_LIMIT = 10;
init( KRM_GET_RANGE_LIMIT_BYTES, 1e8 ); if( randomize && BUGGIFY ) KRM_GET_RANGE_LIMIT_BYTES = 10000; //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
init( DEFAULT_MAX_OUTSTANDING_WATCHES, 1e4 );
init( ABSOLUTE_MAX_WATCHES, 1e6 );
init( WATCH_POLLING_TIME, 1.0 ); if( randomize && BUGGIFY ) WATCH_POLLING_TIME = 5.0;
init( NO_RECENT_UPDATES_DURATION, 20.0 ); if( randomize && BUGGIFY ) NO_RECENT_UPDATES_DURATION = 0.1;
init( FAST_WATCH_TIMEOUT, 20.0 ); if( randomize && BUGGIFY ) FAST_WATCH_TIMEOUT = 1.0;
init( WATCH_TIMEOUT, 30.0 ); if( randomize && BUGGIFY ) WATCH_TIMEOUT = 20.0;
// Core
init( CORE_VERSIONSPERSECOND, 1e6 );
init( LOG_RANGE_BLOCK_SIZE, 1e6 ); //Dependent on CORE_VERSIONSPERSECOND
init( MUTATION_BLOCK_SIZE, 10000 );
// TaskBucket
init( TASKBUCKET_LOGGING_DELAY, 5.0 );
init( TASKBUCKET_MAX_PRIORITY, 1 );
init( TASKBUCKET_CHECK_TIMEOUT_CHANCE, 0.02 ); if( randomize && BUGGIFY ) TASKBUCKET_CHECK_TIMEOUT_CHANCE = 1.0;
init( TASKBUCKET_TIMEOUT_JITTER_OFFSET, 0.9 );
init( TASKBUCKET_TIMEOUT_JITTER_RANGE, 0.2 );
init( TASKBUCKET_CHECK_ACTIVE_DELAY, 0.5 );
init( TASKBUCKET_CHECK_ACTIVE_AMOUNT, 10 );
init( TASKBUCKET_TIMEOUT_VERSIONS, 60*CORE_VERSIONSPERSECOND ); if( randomize && BUGGIFY ) TASKBUCKET_TIMEOUT_VERSIONS = 30*CORE_VERSIONSPERSECOND;
init( TASKBUCKET_MAX_TASK_KEYS, 1000 ); if( randomize && BUGGIFY ) TASKBUCKET_MAX_TASK_KEYS = 20;
//Backup
init( BACKUP_LOCAL_FILE_WRITE_BLOCK, 1024*1024 ); if( randomize && BUGGIFY ) BACKUP_LOCAL_FILE_WRITE_BLOCK = 100;
init( BACKUP_CONCURRENT_DELETES, 100 );
init( BACKUP_SIMULATED_LIMIT_BYTES, 1e6 ); if( randomize && BUGGIFY ) BACKUP_SIMULATED_LIMIT_BYTES = 1000;
init( BACKUP_GET_RANGE_LIMIT_BYTES, 1e6 );
init( BACKUP_LOCK_BYTES, 1e8 );
init( BACKUP_RANGE_TIMEOUT, TASKBUCKET_TIMEOUT_VERSIONS/CORE_VERSIONSPERSECOND/2.0 );
init( BACKUP_RANGE_MINWAIT, std::max(1.0, BACKUP_RANGE_TIMEOUT/2.0));
init( BACKUP_SNAPSHOT_DISPATCH_INTERVAL_SEC, 10 * 60 ); // 10 minutes
init( BACKUP_DEFAULT_SNAPSHOT_INTERVAL_SEC, 3600 * 24 * 10); // 10 days
init( BACKUP_SHARD_TASK_LIMIT, 1000 ); if( randomize && BUGGIFY ) BACKUP_SHARD_TASK_LIMIT = 4;
init( BACKUP_AGGREGATE_POLL_RATE_UPDATE_INTERVAL, 60);
init( BACKUP_AGGREGATE_POLL_RATE, 2.0 ); // polls per second target for all agents on the cluster
init( BACKUP_LOG_WRITE_BATCH_MAX_SIZE, 1e6 ); //Must be much smaller than TRANSACTION_SIZE_LIMIT
init( BACKUP_LOG_ATOMIC_OPS_SIZE, 1000 );
init( BACKUP_OPERATION_COST_OVERHEAD, 50 );
init( BACKUP_MAX_LOG_RANGES, 21 ); if( randomize && BUGGIFY ) BACKUP_MAX_LOG_RANGES = 4;
init( BACKUP_SIM_COPY_LOG_RANGES, 100 );
init( BACKUP_VERSION_DELAY, 5*CORE_VERSIONSPERSECOND );
bool buggifyMapLimits = randomize && BUGGIFY;
init( BACKUP_MAP_KEY_LOWER_LIMIT, 1e4 ); if( buggifyMapLimits ) BACKUP_MAP_KEY_LOWER_LIMIT = 4;
init( BACKUP_MAP_KEY_UPPER_LIMIT, 1e5 ); if( buggifyMapLimits ) BACKUP_MAP_KEY_UPPER_LIMIT = 30;
init( BACKUP_COPY_TASKS, 90 );
init( BACKUP_BLOCK_SIZE, LOG_RANGE_BLOCK_SIZE/10 );
init( COPY_LOG_BLOCK_SIZE, LOG_RANGE_BLOCK_SIZE ); // the maximum possible value due the getLogRanges limitations
init( COPY_LOG_BLOCKS_PER_TASK, 1000 );
init( COPY_LOG_PREFETCH_BLOCKS, 3 );
init( COPY_LOG_READ_AHEAD_BYTES, BACKUP_LOCK_BYTES / COPY_LOG_PREFETCH_BLOCKS); // each task will use up to COPY_LOG_PREFETCH_BLOCKS * COPY_LOG_READ_AHEAD_BYTES memory
init( COPY_LOG_TASK_DURATION_NANOS, 1e10 ); // 10 seconds
init( BACKUP_TASKS_PER_AGENT, 10 );
init( BACKUP_POLL_PROGRESS_SECONDS, 10 );
init( VERSIONS_PER_SECOND, 1e6 ); // Must be the same as SERVER_KNOBS->VERSIONS_PER_SECOND
init( SIM_BACKUP_TASKS_PER_AGENT, 10 );
init( BACKUP_RANGEFILE_BLOCK_SIZE, 1024 * 1024);
init( BACKUP_LOGFILE_BLOCK_SIZE, 1024 * 1024);
init( BACKUP_DISPATCH_ADDTASK_SIZE, 50 );
init( RESTORE_DISPATCH_ADDTASK_SIZE, 150 );
init( RESTORE_DISPATCH_BATCH_SIZE, 30000 ); if( randomize && BUGGIFY ) RESTORE_DISPATCH_BATCH_SIZE = 20;
init( RESTORE_WRITE_TX_SIZE, 256 * 1024 );
init( APPLY_MAX_LOCK_BYTES, 1e9 );
init( APPLY_MIN_LOCK_BYTES, 11e6 ); //Must be bigger than TRANSACTION_SIZE_LIMIT
init( APPLY_BLOCK_SIZE, LOG_RANGE_BLOCK_SIZE/5 );
init( APPLY_MAX_DECAY_RATE, 0.99 );
init( APPLY_MAX_INCREASE_FACTOR, 1.1 );
init( BACKUP_ERROR_DELAY, 10.0 );
init( BACKUP_STATUS_DELAY, 40.0 );
init( BACKUP_STATUS_JITTER, 0.05 );
init( MIN_CLEANUP_SECONDS, 3600.0 );
// Configuration
init( DEFAULT_AUTO_COMMIT_PROXIES, 3 );
init( DEFAULT_AUTO_GRV_PROXIES, 1 );
init( DEFAULT_AUTO_RESOLVERS, 1 );
init( DEFAULT_AUTO_LOGS, 3 );
init( DEFAULT_COMMIT_GRV_PROXIES_RATIO, 3 );
init( DEFAULT_MAX_GRV_PROXIES, 4 );
init( IS_ACCEPTABLE_DELAY, 1.5 );
init( HTTP_READ_SIZE, 128*1024 );
init( HTTP_SEND_SIZE, 32*1024 );
init( HTTP_VERBOSE_LEVEL, 0 );
init( HTTP_REQUEST_ID_HEADER, "" );
init( BLOBSTORE_CONNECT_TRIES, 10 );
init( BLOBSTORE_CONNECT_TIMEOUT, 10 );
init( BLOBSTORE_MAX_CONNECTION_LIFE, 120 );
init( BLOBSTORE_REQUEST_TRIES, 10 );
init( BLOBSTORE_REQUEST_TIMEOUT_MIN, 60 );
init( BLOBSTORE_CONCURRENT_UPLOADS, BACKUP_TASKS_PER_AGENT*2 );
init( BLOBSTORE_CONCURRENT_LISTS, 20 );
init( BLOBSTORE_CONCURRENT_REQUESTS, BLOBSTORE_CONCURRENT_UPLOADS + BLOBSTORE_CONCURRENT_LISTS + 5);
init( BLOBSTORE_CONCURRENT_WRITES_PER_FILE, 5 );
init( BLOBSTORE_CONCURRENT_READS_PER_FILE, 3 );
init( BLOBSTORE_READ_BLOCK_SIZE, 1024 * 1024 );
init( BLOBSTORE_READ_AHEAD_BLOCKS, 0 );
init( BLOBSTORE_READ_CACHE_BLOCKS_PER_FILE, 2 );
init( BLOBSTORE_MULTIPART_MAX_PART_SIZE, 20000000 );
init( BLOBSTORE_MULTIPART_MIN_PART_SIZE, 5242880 );
// These are basically unlimited by default but can be used to reduce blob IO if needed
init( BLOBSTORE_REQUESTS_PER_SECOND, 200 );
init( BLOBSTORE_MAX_SEND_BYTES_PER_SECOND, 1e9 );
init( BLOBSTORE_MAX_RECV_BYTES_PER_SECOND, 1e9 );
init( BLOBSTORE_LIST_REQUESTS_PER_SECOND, 200 );
init( BLOBSTORE_WRITE_REQUESTS_PER_SECOND, 50 );
init( BLOBSTORE_READ_REQUESTS_PER_SECOND, 100 );
init( BLOBSTORE_DELETE_REQUESTS_PER_SECOND, 200 );
// Client Status Info
init(CSI_SAMPLING_PROBABILITY, -1.0);
init(CSI_SIZE_LIMIT, std::numeric_limits<int64_t>::max());
if (randomize && BUGGIFY) {
CSI_SAMPLING_PROBABILITY = deterministicRandom()->random01() / 10; // rand range 0 - 0.1
CSI_SIZE_LIMIT = deterministicRandom()->randomInt(1024 * 1024, 100 * 1024 * 1024); // 1 MB - 100 MB
}
init(CSI_STATUS_DELAY, 10.0 );
init( CONSISTENCY_CHECK_RATE_LIMIT_MAX, 50e6 ); // Limit in per sec
init( CONSISTENCY_CHECK_ONE_ROUND_TARGET_COMPLETION_TIME, 7 * 24 * 60 * 60 ); // 7 days
//fdbcli
init( CLI_CONNECT_PARALLELISM, 400 );
init( CLI_CONNECT_TIMEOUT, 10.0 );
// trace
init( TRACE_LOG_FILE_IDENTIFIER_MAX_LENGTH, 50 );
// transaction tags
init( MAX_TAGS_PER_TRANSACTION, 5 );
init( MAX_TRANSACTION_TAG_LENGTH, 16 );
init( COMMIT_SAMPLE_COST, 100 ); if( randomize && BUGGIFY ) COMMIT_SAMPLE_COST = 10;
init( WRITE_COST_BYTE_FACTOR, 16384 ); if( randomize && BUGGIFY ) WRITE_COST_BYTE_FACTOR = 4096;
init( INCOMPLETE_SHARD_PLUS, 4096 );
init( READ_TAG_SAMPLE_RATE, 0.01 ); if( randomize && BUGGIFY ) READ_TAG_SAMPLE_RATE = 1.0; // Communicated to clients from cluster
init( TAG_THROTTLE_SMOOTHING_WINDOW, 2.0 );
init( TAG_THROTTLE_RECHECK_INTERVAL, 5.0 ); if( randomize && BUGGIFY ) TAG_THROTTLE_RECHECK_INTERVAL = 0.0;
init( TAG_THROTTLE_EXPIRATION_INTERVAL, 60.0 ); if( randomize && BUGGIFY ) TAG_THROTTLE_EXPIRATION_INTERVAL = 1.0;
// clang-format on
}
TEST_CASE("/fdbclient/knobs/initialize") {
// This test depends on TASKBUCKET_TIMEOUT_VERSIONS being defined as a constant multiple of CORE_VERSIONSPERSECOND
ClientKnobs clientKnobs;
int initialCoreVersionsPerSecond = clientKnobs.CORE_VERSIONSPERSECOND;
int initialTaskBucketTimeoutVersions = clientKnobs.TASKBUCKET_TIMEOUT_VERSIONS;
clientKnobs.setKnob("core_versionspersecond", format("%ld", initialCoreVersionsPerSecond * 2));
ASSERT(clientKnobs.CORE_VERSIONSPERSECOND == initialCoreVersionsPerSecond * 2);
ASSERT(clientKnobs.TASKBUCKET_TIMEOUT_VERSIONS == initialTaskBucketTimeoutVersions);
clientKnobs.initialize();
ASSERT(clientKnobs.CORE_VERSIONSPERSECOND == initialCoreVersionsPerSecond * 2);
ASSERT(clientKnobs.TASKBUCKET_TIMEOUT_VERSIONS == initialTaskBucketTimeoutVersions * 2);
return Void();
}
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