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foundationdb/fdbserver/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 "Knobs.h"
#include "fdbrpc/Locality.h"
ServerKnobs const* SERVER_KNOBS = new ServerKnobs();
#define init( knob, value ) initKnob( knob, value, #knob )
ServerKnobs::ServerKnobs(bool randomize, ClientKnobs* clientKnobs) {
// TLogs
init( TLOG_TIMEOUT, 0.4 ); //cannot buggify because of availability
init( RECOVERY_TLOG_SMART_QUORUM_DELAY, 0.25 ); if( randomize && BUGGIFY ) RECOVERY_TLOG_SMART_QUORUM_DELAY = 0.0; // smaller might be better for bug amplification
init( TLOG_STORAGE_MIN_UPDATE_INTERVAL, 0.5 );
init( BUGGIFY_TLOG_STORAGE_MIN_UPDATE_INTERVAL, 30 );
init( UNFLUSHED_DATA_RATIO, 0.05 ); if( randomize && BUGGIFY ) UNFLUSHED_DATA_RATIO = 0.0;
init( DESIRED_TOTAL_BYTES, 150000 ); if( randomize && BUGGIFY ) DESIRED_TOTAL_BYTES = 10000;
init( MAXIMUM_PEEK_BYTES, 10e6 );
init( APPLY_MUTATION_BYTES, 1e6 );
init( RECOVERY_DATA_BYTE_LIMIT, 100000 );
init( BUGGIFY_RECOVERY_DATA_LIMIT, 1000 );
init( LONG_TLOG_COMMIT_TIME, 0.25 ); //cannot buggify because of recovery time
init( LARGE_TLOG_COMMIT_BYTES, 4<<20 );
init( BUGGIFY_RECOVER_MEMORY_LIMIT, 1e6 );
init( BUGGIFY_WORKER_REMOVED_MAX_LAG, 30 );
init( UPDATE_STORAGE_BYTE_LIMIT, 1e6 );
init( TLOG_PEEK_DELAY, 0.00005 );
init( LEGACY_TLOG_UPGRADE_ENTRIES_PER_VERSION, 100 );
init( VERSION_MESSAGES_OVERHEAD_FACTOR_1024THS, 1072 ); // Based on a naive interpretation of the gcc version of std::deque, we would expect this to be 16 bytes overhead per 512 bytes data. In practice, it seems to be 24 bytes overhead per 512.
init( LOG_SYSTEM_PUSHED_DATA_BLOCK_SIZE, 1e5 );
init( MAX_MESSAGE_SIZE, std::max<int>(LOG_SYSTEM_PUSHED_DATA_BLOCK_SIZE, 1e5 + 2e4 + 1) + 8 ); // VALUE_SIZE_LIMIT + SYSTEM_KEY_SIZE_LIMIT + 9 bytes (4 bytes for length, 4 bytes for sequence number, and 1 byte for mutation type)
init( TLOG_MESSAGE_BLOCK_BYTES, 10e6 );
init( TLOG_MESSAGE_BLOCK_OVERHEAD_FACTOR, double(TLOG_MESSAGE_BLOCK_BYTES) / (TLOG_MESSAGE_BLOCK_BYTES - MAX_MESSAGE_SIZE) ); //1.0121466709838096006362758832473
init( PEEK_TRACKER_EXPIRATION_TIME, 600 ); if( randomize && BUGGIFY ) PEEK_TRACKER_EXPIRATION_TIME = g_random->coinflip() ? 0.1 : 60;
init( PARALLEL_GET_MORE_REQUESTS, 32 ); if( randomize && BUGGIFY ) PARALLEL_GET_MORE_REQUESTS = 2;
init( MAX_QUEUE_COMMIT_BYTES, 15e6 ); if( randomize && BUGGIFY ) MAX_QUEUE_COMMIT_BYTES = 5000;
// Versions
init( MAX_VERSIONS_IN_FLIGHT, 100000000 );
init( VERSIONS_PER_SECOND, 1000000 );
init( MAX_READ_TRANSACTION_LIFE_VERSIONS, 5 * VERSIONS_PER_SECOND ); if (randomize && BUGGIFY) MAX_READ_TRANSACTION_LIFE_VERSIONS=std::max<int>(1, 0.1 * VERSIONS_PER_SECOND); else if( randomize && BUGGIFY ) MAX_READ_TRANSACTION_LIFE_VERSIONS = 10 * VERSIONS_PER_SECOND;
init( MAX_WRITE_TRANSACTION_LIFE_VERSIONS, 5 * VERSIONS_PER_SECOND ); if (randomize && BUGGIFY) MAX_WRITE_TRANSACTION_LIFE_VERSIONS=std::max<int>(1, 1 * VERSIONS_PER_SECOND);
init( MAX_COMMIT_BATCH_INTERVAL, 0.5 ); if( randomize && BUGGIFY ) MAX_COMMIT_BATCH_INTERVAL = 2.0; // Each master proxy generates a CommitTransactionBatchRequest at least this often, so that versions always advance smoothly
MAX_COMMIT_BATCH_INTERVAL = std::min(MAX_COMMIT_BATCH_INTERVAL, MAX_READ_TRANSACTION_LIFE_VERSIONS/double(2*VERSIONS_PER_SECOND)); // Ensure that the proxy commits 2 times every MAX_READ_TRANSACTION_LIFE_VERSIONS, otherwise the master will not give out versions fast enough
// Data distribution queue
init( HEALTH_POLL_TIME, 1.0 );
init( BEST_TEAM_STUCK_DELAY, 1.0 );
init( BG_DD_POLLING_INTERVAL, 10.0 );
init( DD_QUEUE_LOGGING_INTERVAL, 5.0 );
init( RELOCATION_PARALLELISM_PER_SOURCE_SERVER, 4 ); if( randomize && BUGGIFY ) RELOCATION_PARALLELISM_PER_SOURCE_SERVER = 1;
init( DD_QUEUE_MAX_KEY_SERVERS, 100 ); if( randomize && BUGGIFY ) DD_QUEUE_MAX_KEY_SERVERS = 1;
init( DD_REBALANCE_PARALLELISM, 50 );
init( DD_REBALANCE_RESET_AMOUNT, 30 );
init( BG_DD_MAX_WAIT, 120.0 );
init( BG_DD_MIN_WAIT, 0.1 );
init( BG_DD_INCREASE_RATE, 1.10 );
init( BG_DD_DECREASE_RATE, 1.02 );
init( BG_DD_SATURATION_DELAY, 1.0 );
init( INFLIGHT_PENALTY_HEALTHY, 1.0 );
init( INFLIGHT_PENALTY_UNHEALTHY, 10.0 );
init( INFLIGHT_PENALTY_ONE_LEFT, 1000.0 );
// Data distribution
init( RETRY_RELOCATESHARD_DELAY, 0.1 );
init( DATA_DISTRIBUTION_FAILURE_REACTION_TIME, 10.0 ); if( randomize && BUGGIFY ) DATA_DISTRIBUTION_FAILURE_REACTION_TIME = 1.0;
bool buggifySmallShards = randomize && BUGGIFY;
init( MIN_SHARD_BYTES, 200000 ); if( buggifySmallShards ) MIN_SHARD_BYTES = 40000; //FIXME: data distribution tracker (specifically StorageMetrics) relies on this number being larger than the maximum size of a key value pair
init( SHARD_BYTES_RATIO, 4 );
init( SHARD_BYTES_PER_SQRT_BYTES, 45 ); if( buggifySmallShards ) SHARD_BYTES_PER_SQRT_BYTES = 0;//Approximately 10000 bytes per shard
init( MAX_SHARD_BYTES, 500000000 );
init( KEY_SERVER_SHARD_BYTES, 500000000 );
bool buggifySmallBandwidthSplit = randomize && BUGGIFY;
init( SHARD_MAX_BYTES_PER_KSEC, 1LL*1000000*1000 ); if( buggifySmallBandwidthSplit ) SHARD_MAX_BYTES_PER_KSEC = 10LL*1000*1000;
/* 10*1MB/sec * 1000sec/ksec
Shards with more than this bandwidth will be split immediately.
For a large shard (100MB), splitting it costs ~100MB of work or about 10MB/sec over a 10 sec sampling window.
If the sampling window is too much longer, the MVCC window will fill up while we wait.
If SHARD_MAX_BYTES_PER_KSEC is too much lower, we could do a lot of data movement work in response to a small impulse of bandwidth.
If SHARD_MAX_BYTES_PER_KSEC is too high relative to the I/O bandwidth of a given server, a workload can remain concentrated on a single
team indefinitely, limiting performance.
*/
init( SHARD_MIN_BYTES_PER_KSEC, 100 * 1000 * 1000 ); if( buggifySmallBandwidthSplit ) SHARD_MIN_BYTES_PER_KSEC = 200*1*1000;
/* 200*1KB/sec * 1000sec/ksec
Shards with more than this bandwidth will not be merged.
Obviously this needs to be significantly less than SHARD_MAX_BYTES_PER_KSEC, else we will repeatedly merge and split.
It should probably be significantly less than SHARD_SPLIT_BYTES_PER_KSEC, else we will merge right after splitting.
The number of extra shards in the database because of bandwidth splitting can't be more than about W/SHARD_MIN_BYTES_PER_KSEC, where
W is the maximum bandwidth of the entire database in bytes/ksec. For 250MB/sec write bandwidth, (250MB/sec)/(200KB/sec) = 1250 extra
shards.
The bandwidth sample maintained by the storage server needs to be accurate enough to reliably measure this minimum bandwidth. See
BANDWIDTH_UNITS_PER_SAMPLE. If this number is too low, the storage server needs to spend more memory and time on sampling.
*/
init( SHARD_SPLIT_BYTES_PER_KSEC, 250 * 1000 * 1000 ); if( buggifySmallBandwidthSplit ) SHARD_SPLIT_BYTES_PER_KSEC = 50 * 1000 * 1000;
/* 500*1KB/sec * 1000sec/ksec
When splitting a shard, it is split into pieces with less than this bandwidth.
Obviously this should be less than half of SHARD_MAX_BYTES_PER_KSEC.
Smaller values mean that high bandwidth shards are split into more pieces, more quickly utilizing large numbers of servers to handle the
bandwidth.
Too many pieces (too small a value) may stress data movement mechanisms (see e.g. RELOCATION_PARALLELISM_PER_SOURCE_SERVER).
If this value is too small relative to SHARD_MIN_BYTES_PER_KSEC immediate merging work will be generated.
*/
init( STORAGE_METRIC_TIMEOUT, 600.0 ); if( randomize && BUGGIFY ) STORAGE_METRIC_TIMEOUT = g_random->coinflip() ? 10.0 : 60.0;
init( METRIC_DELAY, 0.1 ); if( randomize && BUGGIFY ) METRIC_DELAY = 1.0;
init( ALL_DATA_REMOVED_DELAY, 1.0 );
init( INITIAL_FAILURE_REACTION_DELAY, 30.0 ); if( randomize && BUGGIFY ) INITIAL_FAILURE_REACTION_DELAY = 0.0;
init( LOG_ON_COMPLETION_DELAY, DD_QUEUE_LOGGING_INTERVAL );
init( BEST_TEAM_MAX_TEAM_TRIES, 10 );
init( BEST_TEAM_OPTION_COUNT, 4 );
init( BEST_OF_AMT, 4 );
init( SERVER_LIST_DELAY, 1.0 );
init( RECRUITMENT_IDLE_DELAY, 1.0 );
init( STORAGE_RECRUITMENT_DELAY, 0.5 );
init( DATA_DISTRIBUTION_LOGGING_INTERVAL, 5.0 );
init( DD_ENABLED_CHECK_DELAY, 1.0 );
init( DD_MERGE_COALESCE_DELAY, 120.0 ); if( randomize && BUGGIFY ) DD_MERGE_COALESCE_DELAY = 0.001;
init( STORAGE_METRICS_POLLING_DELAY, 2.0 ); if( randomize && BUGGIFY ) STORAGE_METRICS_POLLING_DELAY = 15.0;
init( STORAGE_METRICS_RANDOM_DELAY, 0.2 );
init( FREE_SPACE_RATIO_CUTOFF, 0.1 );
init( FREE_SPACE_RATIO_DD_CUTOFF, 0.2 );
init( DESIRED_TEAMS_PER_SERVER, 5 ); if( randomize && BUGGIFY ) DESIRED_TEAMS_PER_SERVER = 1;
init( DD_SHARD_SIZE_GRANULARITY, 5000000 );
init( DD_SHARD_SIZE_GRANULARITY_SIM, 500000 ); if( randomize && BUGGIFY ) DD_SHARD_SIZE_GRANULARITY_SIM = 0;
init( DD_MOVE_KEYS_PARALLELISM, 20 ); if( randomize && BUGGIFY ) DD_MOVE_KEYS_PARALLELISM = 1;
init( DD_MERGE_LIMIT, 2000 ); if( randomize && BUGGIFY ) DD_MERGE_LIMIT = 2;
init( DD_SHARD_METRICS_TIMEOUT, 60.0 ); if( randomize && BUGGIFY ) DD_SHARD_METRICS_TIMEOUT = 0.1;
init( DD_LOCATION_CACHE_SIZE, 2000000 ); if( randomize && BUGGIFY ) DD_LOCATION_CACHE_SIZE = 3;
init( MOVEKEYS_LOCK_POLLING_DELAY, 5.0 );
init( DEBOUNCE_RECRUITING_DELAY, 5.0 );
// KeyValueStore SQLITE
init( CLEAR_BUFFER_SIZE, 20000 );
init( READ_VALUE_TIME_ESTIMATE, .00005 );
init( READ_RANGE_TIME_ESTIMATE, .00005 );
init( SET_TIME_ESTIMATE, .00005 );
init( CLEAR_TIME_ESTIMATE, .00005 );
init( COMMIT_TIME_ESTIMATE, .005 );
init( CHECK_FREE_PAGE_AMOUNT, 100 ); if( randomize && BUGGIFY ) CHECK_FREE_PAGE_AMOUNT = 5;
init( DISK_METRIC_LOGGING_INTERVAL, 5.0 );
init( SOFT_HEAP_LIMIT, 300e6 );
init( SQLITE_PAGE_SCAN_ERROR_LIMIT, 10000 );
init( SQLITE_BTREE_PAGE_USABLE, 4096 - 8); // pageSize - reserveSize for page checksum
// Maximum and minimum cell payload bytes allowed on primary page as calculated in SQLite.
// These formulas are copied from SQLite, using its hardcoded constants, so if you are
// changing this you should also be changing SQLite.
init( SQLITE_BTREE_CELL_MAX_LOCAL, (SQLITE_BTREE_PAGE_USABLE - 12) * 64/255 - 23 );
init( SQLITE_BTREE_CELL_MIN_LOCAL, (SQLITE_BTREE_PAGE_USABLE - 12) * 32/255 - 23 );
// Maximum FDB fragment key and value bytes that can fit in a primary btree page
init( SQLITE_FRAGMENT_PRIMARY_PAGE_USABLE,
SQLITE_BTREE_CELL_MAX_LOCAL
- 1 // vdbeRecord header length size
- 2 // max key length size
- 4 // max index length size
- 2 // max value fragment length size
);
// Maximum FDB fragment value bytes in an overflow page
init( SQLITE_FRAGMENT_OVERFLOW_PAGE_USABLE,
SQLITE_BTREE_PAGE_USABLE
- 4 // next pageNumber size
);
init( SQLITE_FRAGMENT_MIN_SAVINGS, 0.20 );
// KeyValueStoreSqlite spring cleaning
init( CLEANING_INTERVAL, 1.0 );
init( SPRING_CLEANING_TIME_ESTIMATE, .010 );
init( SPRING_CLEANING_VACUUMS_PER_LAZY_DELETE_PAGE, 0.0 ); if( randomize && BUGGIFY ) SPRING_CLEANING_VACUUMS_PER_LAZY_DELETE_PAGE = g_random->coinflip() ? 1e9 : g_random->random01() * 5;
init( SPRING_CLEANING_MIN_LAZY_DELETE_PAGES, 0 ); if( randomize && BUGGIFY ) SPRING_CLEANING_MIN_LAZY_DELETE_PAGES = g_random->randomInt(1, 100);
init( SPRING_CLEANING_MAX_LAZY_DELETE_PAGES, 1e9 ); if( randomize && BUGGIFY ) SPRING_CLEANING_MAX_LAZY_DELETE_PAGES = g_random->coinflip() ? 0 : g_random->randomInt(1, 1e4);
init( SPRING_CLEANING_LAZY_DELETE_BATCH_SIZE, 100 ); if( randomize && BUGGIFY ) SPRING_CLEANING_LAZY_DELETE_BATCH_SIZE = g_random->randomInt(1, 1000);
init( SPRING_CLEANING_MIN_VACUUM_PAGES, 1 ); if( randomize && BUGGIFY ) SPRING_CLEANING_MIN_VACUUM_PAGES = g_random->randomInt(0, 100);
init( SPRING_CLEANING_MAX_VACUUM_PAGES, 1e9 ); if( randomize && BUGGIFY ) SPRING_CLEANING_MAX_VACUUM_PAGES = g_random->coinflip() ? 0 : g_random->randomInt(1, 1e4);
// Leader election
bool longLeaderElection = randomize && BUGGIFY;
init( CANDIDATE_MIN_DELAY, 0.05 );
init( CANDIDATE_MAX_DELAY, 1.0 );
init( CANDIDATE_GROWTH_RATE, 1.2 );
init( POLLING_FREQUENCY, 1.0 ); if( longLeaderElection ) POLLING_FREQUENCY = 8.0;
init( HEARTBEAT_FREQUENCY, 0.25 ); if( longLeaderElection ) HEARTBEAT_FREQUENCY = 1.0;
// Master Proxy
init( START_TRANSACTION_BATCH_INTERVAL_MIN, 1e-6 );
init( START_TRANSACTION_BATCH_INTERVAL_MAX, 0.010 );
init( START_TRANSACTION_BATCH_INTERVAL_LATENCY_FRACTION, 0.5 );
init( START_TRANSACTION_BATCH_INTERVAL_SMOOTHER_ALPHA, 0.1 );
init( START_TRANSACTION_BATCH_QUEUE_CHECK_INTERVAL, 0.001 );
init( START_TRANSACTION_MAX_TRANSACTIONS_TO_START, 10000 );
init( START_TRANSACTION_MAX_BUDGET_SIZE, 20 ); // Currently set to match CLIENT_KNOBS->MAX_BATCH_SIZE
init( COMMIT_TRANSACTION_BATCH_INTERVAL_FROM_IDLE, 0.0005 ); if( randomize && BUGGIFY ) COMMIT_TRANSACTION_BATCH_INTERVAL_FROM_IDLE = 0.005;
init( COMMIT_TRANSACTION_BATCH_INTERVAL_MIN, 0.001 ); if( randomize && BUGGIFY ) COMMIT_TRANSACTION_BATCH_INTERVAL_MIN = 0.1;
init( COMMIT_TRANSACTION_BATCH_INTERVAL_MAX, 0.020 );
init( COMMIT_TRANSACTION_BATCH_INTERVAL_LATENCY_FRACTION, 0.1 );
init( COMMIT_TRANSACTION_BATCH_INTERVAL_SMOOTHER_ALPHA, 0.1 );
init( COMMIT_TRANSACTION_BATCH_COUNT_MAX, 32768 ); if( randomize && BUGGIFY ) COMMIT_TRANSACTION_BATCH_COUNT_MAX = 1000; // Do NOT increase this number beyond 32768, as CommitIds only budget 2 bytes for storing transaction id within each batch
// these settings disable batch bytes scaling. Try COMMIT_TRANSACTION_BATCH_BYTES_MAX=1e6, COMMIT_TRANSACTION_BATCH_BYTES_SCALE_BASE=50000, COMMIT_TRANSACTION_BATCH_BYTES_SCALE_POWER=0.5?
init( COMMIT_TRANSACTION_BATCH_BYTES_MIN, 100000 );
init( COMMIT_TRANSACTION_BATCH_BYTES_MAX, 100000 ); if( randomize && BUGGIFY ) { COMMIT_TRANSACTION_BATCH_BYTES_MIN = COMMIT_TRANSACTION_BATCH_BYTES_MAX = 1000000; }
init( COMMIT_TRANSACTION_BATCH_BYTES_SCALE_BASE, 100000 );
init( COMMIT_TRANSACTION_BATCH_BYTES_SCALE_POWER, 0.0 );
init( TRANSACTION_BUDGET_TIME, 0.050 ); if( randomize && BUGGIFY ) TRANSACTION_BUDGET_TIME = 0.0;
init( RESOLVER_COALESCE_TIME, 1.0 );
init( BUGGIFIED_ROW_LIMIT, APPLY_MUTATION_BYTES ); if( randomize && BUGGIFY ) BUGGIFIED_ROW_LIMIT = g_random->randomInt(3, 30);
init( PROXY_SPIN_DELAY, 0.01 );
// Master Server
init( MASTER_LOGGING_DELAY, 1.0 );
// masterCommitter() in the master server will allow lower priority tasks (e.g. DataDistibution)
// by delay()ing for this amount of time between accepted batches of TransactionRequests.
init( COMMIT_SLEEP_TIME, 0.0001 ); if( randomize && BUGGIFY ) COMMIT_SLEEP_TIME = 0;
init( MIN_BALANCE_TIME, 0.2 );
init( MIN_BALANCE_DIFFERENCE, 10000 );
init( SECONDS_BEFORE_NO_FAILURE_DELAY, 8 * 3600 );
init( MAX_TXS_SEND_MEMORY, 1e7 ); if( randomize && BUGGIFY ) MAX_TXS_SEND_MEMORY = 1e5;
// Resolver
init( SAMPLE_OFFSET_PER_KEY, 100 );
init( SAMPLE_EXPIRATION_TIME, 1.0 );
init( SAMPLE_POLL_TIME, 0.1 );
init( RESOLVER_STATE_MEMORY_LIMIT, 1e6 );
init( LAST_LIMITED_RATIO, 0.6 );
//Cluster Controller
init( MASTER_FAILURE_REACTION_TIME, 0.4 ); if( randomize && BUGGIFY ) MASTER_FAILURE_REACTION_TIME = 10.0;
init( MASTER_FAILURE_SLOPE_DURING_RECOVERY, 0.1 );
init( WORKER_COORDINATION_PING_DELAY, 60 );
init( SIM_SHUTDOWN_TIMEOUT, 10 );
init( SHUTDOWN_TIMEOUT, 600 ); if( randomize && BUGGIFY ) SHUTDOWN_TIMEOUT = 60.0;
init( MASTER_SPIN_DELAY, 1.0 ); if( randomize && BUGGIFY ) MASTER_SPIN_DELAY = 10.0;
init( CC_CHANGE_DELAY, 0.1 );
init( WAIT_FOR_GOOD_RECRUITMENT_DELAY, 0.1 );
init( ATTEMPT_RECRUITMENT_DELAY, 0.035 );
init( WORKER_FAILURE_TIME, 1.0 ); if( randomize && BUGGIFY ) WORKER_FAILURE_TIME = 10.0;
init( CHECK_BETTER_MASTER_INTERVAL, 1.0 ); if( randomize && BUGGIFY ) CHECK_BETTER_MASTER_INTERVAL = 0.001;
init( INCOMPATIBLE_PEERS_LOGGING_INTERVAL, 600 ); if( randomize && BUGGIFY ) INCOMPATIBLE_PEERS_LOGGING_INTERVAL = 60.0;
init( EXPECTED_MASTER_FITNESS, ProcessClass::GoodFit );
init( EXPECTED_TLOG_FITNESS, ProcessClass::GoodFit );
init( EXPECTED_LOG_ROUTER_FITNESS, ProcessClass::GoodFit );
init( EXPECTED_PROXY_FITNESS, ProcessClass::GoodFit );
init( EXPECTED_RESOLVER_FITNESS, ProcessClass::GoodFit );
init( RECRUITMENT_TIMEOUT, 600 ); if( randomize && BUGGIFY ) RECRUITMENT_TIMEOUT = g_random->coinflip() ? 60.0 : 1.0;
init( POLICY_RATING_TESTS, 200 ); if( randomize && BUGGIFY ) POLICY_RATING_TESTS = 20;
init( POLICY_GENERATIONS, 100 ); if( randomize && BUGGIFY ) POLICY_GENERATIONS = 10;
//Move Keys
init( SHARD_READY_DELAY, 0.25 );
init( SERVER_READY_QUORUM_INTERVAL, std::min(1.0, std::min(MAX_READ_TRANSACTION_LIFE_VERSIONS, MAX_WRITE_TRANSACTION_LIFE_VERSIONS)/(5.0*VERSIONS_PER_SECOND)) );
init( SERVER_READY_QUORUM_TIMEOUT, 15.0 ); if( randomize && BUGGIFY ) SERVER_READY_QUORUM_TIMEOUT = 1.0;
init( REMOVE_RETRY_DELAY, 1.0 );
init( MOVE_KEYS_KRM_LIMIT, 2000 ); if( randomize && BUGGIFY ) MOVE_KEYS_KRM_LIMIT = 2;
init( MOVE_KEYS_KRM_LIMIT_BYTES, 1e5 ); if( randomize && BUGGIFY ) MOVE_KEYS_KRM_LIMIT_BYTES = 5e4; //This must be sufficiently larger than CLIENT_KNOBS->KEY_SIZE_LIMIT (fdbclient/Knobs.h) to ensure that at least two entries will be returned from an attempt to read a key range map
init( SKIP_TAGS_GROWTH_RATE, 2.0 );
init( MAX_SKIP_TAGS, 100 );
//FdbServer
bool longReboots = randomize && BUGGIFY;
init( MIN_REBOOT_TIME, 4.0 ); if( longReboots ) MIN_REBOOT_TIME = 10.0;
init( MAX_REBOOT_TIME, 5.0 ); if( longReboots ) MAX_REBOOT_TIME = 20.0;
init( LOG_DIRECTORY, "."); // Will be set to the command line flag.
//Ratekeeper
bool slowRateKeeper = randomize && BUGGIFY;
init( SMOOTHING_AMOUNT, 1.0 ); if( slowRateKeeper ) SMOOTHING_AMOUNT = 5.0;
init( SLOW_SMOOTHING_AMOUNT, 10.0 ); if( slowRateKeeper ) SLOW_SMOOTHING_AMOUNT = 50.0;
init( METRIC_UPDATE_RATE, .1 ); if( slowRateKeeper ) METRIC_UPDATE_RATE = 0.5;
bool smallStorageTarget = randomize && BUGGIFY;
init( TARGET_BYTES_PER_STORAGE_SERVER, 1000e6 ); if( smallStorageTarget ) TARGET_BYTES_PER_STORAGE_SERVER = 1000e3;
init( SPRING_BYTES_STORAGE_SERVER, 100e6 ); if( smallStorageTarget ) SPRING_BYTES_STORAGE_SERVER = 100e3;
bool smallTlogTarget = randomize && BUGGIFY;
init( TARGET_BYTES_PER_TLOG, 2000e6 ); if( smallTlogTarget ) TARGET_BYTES_PER_TLOG = 2000e3;
init( SPRING_BYTES_TLOG, 400e6 ); if( smallTlogTarget ) SPRING_BYTES_TLOG = 200e3;
init( TLOG_SPILL_THRESHOLD, 1500e6 ); if( smallTlogTarget ) TLOG_SPILL_THRESHOLD = 1500e3; if( randomize && BUGGIFY ) TLOG_SPILL_THRESHOLD = 0;
init( MAX_TRANSACTIONS_PER_BYTE, 1000 );
init( MIN_FREE_SPACE, 1e8 );
init( MIN_FREE_SPACE_RATIO, 0.05 );
init( MAX_TL_SS_VERSION_DIFFERENCE, 1e99 ); // if( randomize && BUGGIFY ) MAX_TL_SS_VERSION_DIFFERENCE = std::max(1.0, 0.25 * VERSIONS_PER_SECOND); // spring starts at half this value //FIXME: this knob causes ratekeeper to clamp on idle cluster in simulation that have a large number of logs
init( MAX_MACHINES_FALLING_BEHIND, 1 );
//Storage Metrics
init( STORAGE_METRICS_AVERAGE_INTERVAL, 120.0 );
init( STORAGE_METRICS_AVERAGE_INTERVAL_PER_KSECONDS, 1000.0 / STORAGE_METRICS_AVERAGE_INTERVAL ); // milliHz!
init( SPLIT_JITTER_AMOUNT, 0.05 ); if( randomize && BUGGIFY ) SPLIT_JITTER_AMOUNT = 0.2;
init( IOPS_UNITS_PER_SAMPLE, 10000 * 1000 / STORAGE_METRICS_AVERAGE_INTERVAL_PER_KSECONDS / 100 );
init( BANDWIDTH_UNITS_PER_SAMPLE, SHARD_MIN_BYTES_PER_KSEC / STORAGE_METRICS_AVERAGE_INTERVAL_PER_KSECONDS / 25 );
//Storage Server
init( STORAGE_LOGGING_DELAY, 5.0 );
init( STORAGE_SERVER_POLL_METRICS_DELAY, 1.0 );
init( FUTURE_VERSION_DELAY, 1.0 ); if( randomize && BUGGIFY ) FUTURE_VERSION_DELAY = 0.001;
init( STORAGE_LIMIT_BYTES, 500000 );
init( BUGGIFY_LIMIT_BYTES, 1000 );
init( FETCH_BLOCK_BYTES, 2e6 );
init( FETCH_KEYS_PARALLELISM_BYTES, 5e6 ); if( randomize && BUGGIFY ) FETCH_KEYS_PARALLELISM_BYTES = 4e6;
init( BUGGIFY_BLOCK_BYTES, 10000 );
init( STORAGE_HARD_LIMIT_BYTES, 1500e6 ); if( randomize && BUGGIFY ) STORAGE_HARD_LIMIT_BYTES = 1500e3;
init( STORAGE_COMMIT_BYTES, 10000000 ); if( randomize && BUGGIFY ) STORAGE_COMMIT_BYTES = 2000000;
init( STORAGE_COMMIT_INTERVAL, 0.5 ); if( randomize && BUGGIFY ) STORAGE_COMMIT_INTERVAL = 2.0;
init( UPDATE_SHARD_VERSION_INTERVAL, 0.25 ); if( randomize && BUGGIFY ) UPDATE_SHARD_VERSION_INTERVAL = 1.0;
init( BYTE_SAMPLING_FACTOR, 250 ); //cannot buggify because of differences in restarting tests
init( BYTE_SAMPLING_OVERHEAD, 100 );
init( MAX_STORAGE_SERVER_WATCH_BYTES, 100e6 ); if( randomize && BUGGIFY ) MAX_STORAGE_SERVER_WATCH_BYTES = 10e3;
init( MAX_BYTE_SAMPLE_CLEAR_MAP_SIZE, 1e9 ); if( randomize && BUGGIFY ) MAX_BYTE_SAMPLE_CLEAR_MAP_SIZE = 1e3;
init( LONG_BYTE_SAMPLE_RECOVERY_DELAY, 60.0 );
//Wait Failure
init( BUGGIFY_OUTSTANDING_WAIT_FAILURE_REQUESTS, 2 );
init( MAX_OUTSTANDING_WAIT_FAILURE_REQUESTS, 250 ); if( randomize && BUGGIFY ) MAX_OUTSTANDING_WAIT_FAILURE_REQUESTS = 2;
init( WAIT_FAILURE_DELAY_LIMIT, 1.0 ); if( randomize && BUGGIFY ) WAIT_FAILURE_DELAY_LIMIT = 5.0;
//Worker
init( WORKER_LOGGING_INTERVAL, 5.0 );
init( INCOMPATIBLE_PEER_DELAY_BEFORE_LOGGING, 5.0 );
// Test harness
init( WORKER_POLL_DELAY, 1.0 );
// Coordination
init( COORDINATED_STATE_ONCONFLICT_POLL_INTERVAL, 1.0 ); if( randomize && BUGGIFY ) COORDINATED_STATE_ONCONFLICT_POLL_INTERVAL = 10.0;
// Buggification
init( BUGGIFIED_EVENTUAL_CONSISTENCY, 1.0 );
BUGGIFY_ALL_COORDINATION = false; if( randomize && BUGGIFY ) { BUGGIFY_ALL_COORDINATION = true; TraceEvent("BuggifyAllCoordination"); }
// Status
init( STATUS_MIN_TIME_BETWEEN_REQUESTS, 0.0 );
init( CONFIGURATION_ROWS_TO_FETCH, 20000 );
// Timekeeper
init( TIME_KEEPER_DELAY, 10 );
init( TIME_KEEPER_MAX_ENTRIES, 3600 * 24 * 30 * 6); if( randomize && BUGGIFY ) { TIME_KEEPER_MAX_ENTRIES = 2; }
if(clientKnobs)
clientKnobs->IS_ACCEPTABLE_DELAY = clientKnobs->IS_ACCEPTABLE_DELAY*std::min(MAX_READ_TRANSACTION_LIFE_VERSIONS, MAX_WRITE_TRANSACTION_LIFE_VERSIONS)/(5.0*VERSIONS_PER_SECOND);
}
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