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| /**
* Copyright (c) 2010 Yahoo! Inc., Copyright (c) 2016-2020 YCSB contributors. All rights reserved.
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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. See accompanying
* LICENSE file.
*/
package site.ycsb.workloads;
import site.ycsb.*;
import site.ycsb.generator.*;
import site.ycsb.generator.UniformLongGenerator;
import site.ycsb.measurements.Measurements;
import java.io.IOException;
// import java.nio.file.Files;
// import java.nio.file.Paths;
import java.util.*;
/**
* The core benchmark scenario. Represents a set of clients doing simple CRUD operations. The
* relative proportion of different kinds of operations, and other properties of the workload,
* are controlled by parameters specified at runtime.
* <p>
* Properties to control the client:
* <UL>
* <LI><b>fieldcount</b>: the number of fields in a record (default: 10)
* <LI><b>fieldlength</b>: the size of each field (default: 100)
* <LI><b>minfieldlength</b>: the minimum size of each field (default: 1)
* <LI><b>readallfields</b>: should reads read all fields (true) or just one (false) (default: true)
* <LI><b>writeallfields</b>: should updates and read/modify/writes update all fields (true) or just
* one (false) (default: false)
* <LI><b>readproportion</b>: what proportion of operations should be reads (default: 0.95)
* <LI><b>updateproportion</b>: what proportion of operations should be updates (default: 0.05)
* <LI><b>insertproportion</b>: what proportion of operations should be inserts (default: 0)
* <LI><b>scanproportion</b>: what proportion of operations should be scans (default: 0)
* <LI><b>readmodifywriteproportion</b>: what proportion of operations should be read a record,
* modify it, write it back (default: 0)
* <LI><b>requestdistribution</b>: what distribution should be used to select the records to operate
* on - uniform, zipfian, hotspot, sequential, exponential or latest (default: uniform)
* <LI><b>minscanlength</b>: for scans, what is the minimum number of records to scan (default: 1)
* <LI><b>maxscanlength</b>: for scans, what is the maximum number of records to scan (default: 1000)
* <LI><b>scanlengthdistribution</b>: for scans, what distribution should be used to choose the
* number of records to scan, for each scan, between 1 and maxscanlength (default: uniform)
* <LI><b>insertstart</b>: for parallel loads and runs, defines the starting record for this
* YCSB instance (default: 0)
* <LI><b>insertcount</b>: for parallel loads and runs, defines the number of records for this
* YCSB instance (default: recordcount)
* <LI><b>zeropadding</b>: for generating a record sequence compatible with string sort order by
* 0 padding the record number. Controls the number of 0s to use for padding. (default: 1)
* For example for row 5, with zeropadding=1 you get 'user5' key and with zeropading=8 you get
* 'user00000005' key. In order to see its impact, zeropadding needs to be bigger than number of
* digits in the record number.
* <LI><b>insertorder</b>: should records be inserted in order by key ("ordered"), or in hashed
* order ("hashed") (default: hashed)
* <LI><b>fieldnameprefix</b>: what should be a prefix for field names, the shorter may decrease the
* required storage size (default: "field")
* </ul>
*/
public class MyWorkload extends Workload {
/**
* The name of the database table to run queries against.
*/
public static final String TABLENAME_PROPERTY = "table";
/**
* The default name of the database table to run queries against.
*/
public static final String TABLENAME_PROPERTY_DEFAULT = "usertable";
protected String table;
/**
* The name of the property for the number of fields in a record.
*/
public static final String FIELD_COUNT_PROPERTY = "fieldcount";
/**
* Default number of fields in a record.
*/
public static final String FIELD_COUNT_PROPERTY_DEFAULT = "10";
private List<String> fieldnames;
/**
* The name of the property for the field length distribution. Options are "uniform", "zipfian"
* (favouring short records), "constant", and "histogram".
* <p>
* If "uniform", "zipfian" or "constant", the maximum field length will be that specified by the
* fieldlength property. If "histogram", then the histogram will be read from the filename
* specified in the "fieldlengthhistogram" property.
*/
public static final String FIELD_LENGTH_DISTRIBUTION_PROPERTY = "fieldlengthdistribution";
/**
* The default field length distribution.
*/
public static final String FIELD_LENGTH_DISTRIBUTION_PROPERTY_DEFAULT = "constant";
/**
* The name of the property for the length of a field in bytes.
*/
public static final String FIELD_LENGTH_PROPERTY = "fieldlength";
/**
* The default maximum length of a field in bytes.
*/
public static final String FIELD_LENGTH_PROPERTY_DEFAULT = "100";
/**
* The name of the property for the minimum length of a field in bytes.
*/
public static final String MIN_FIELD_LENGTH_PROPERTY = "minfieldlength";
/**
* The default minimum length of a field in bytes.
*/
public static final String MIN_FIELD_LENGTH_PROPERTY_DEFAULT = "1";
/**
* The name of a property that specifies the filename containing the field length histogram (only
* used if fieldlengthdistribution is "histogram").
*/
public static final String FIELD_LENGTH_HISTOGRAM_FILE_PROPERTY = "fieldlengthhistogram";
/**
* The default filename containing a field length histogram.
*/
public static final String FIELD_LENGTH_HISTOGRAM_FILE_PROPERTY_DEFAULT = "hist.txt";
/**
* Generator object that produces field lengths. The value of this depends on the properties that
* start with "FIELD_LENGTH_".
*/
protected NumberGenerator fieldlengthgenerator;
/**
* The name of the property for deciding whether to read one field (false) or all fields (true) of
* a record.
*/
public static final String READ_ALL_FIELDS_PROPERTY = "readallfields";
/**
* The default value for the readallfields property.
*/
public static final String READ_ALL_FIELDS_PROPERTY_DEFAULT = "true";
protected boolean readallfields;
/**
* The name of the property for determining how to read all the fields when readallfields is true.
* If set to true, all the field names will be passed into the underlying client. If set to false,
* null will be passed into the underlying client. When passed a null, some clients may retrieve
* the entire row with a wildcard, which may be slower than naming all the fields.
*/
public static final String READ_ALL_FIELDS_BY_NAME_PROPERTY = "readallfieldsbyname";
/**
* The default value for the readallfieldsbyname property.
*/
public static final String READ_ALL_FIELDS_BY_NAME_PROPERTY_DEFAULT = "false";
protected boolean readallfieldsbyname;
/**
* The name of the property for deciding whether to write one field (false) or all fields (true)
* of a record.
*/
public static final String WRITE_ALL_FIELDS_PROPERTY = "writeallfields";
/**
* The default value for the writeallfields property.
*/
public static final String WRITE_ALL_FIELDS_PROPERTY_DEFAULT = "false";
protected boolean writeallfields;
/**
* The name of the property for deciding whether to check all returned
* data against the formation template to ensure data integrity.
*/
public static final String DATA_INTEGRITY_PROPERTY = "dataintegrity";
/**
* The default value for the dataintegrity property.
*/
public static final String DATA_INTEGRITY_PROPERTY_DEFAULT = "false";
/**
* Set to true if want to check correctness of reads. Must also
* be set to true during loading phase to function.
*/
private boolean dataintegrity;
/**
* The name of the property for the proportion of transactions that are reads.
*/
public static final String READ_PROPORTION_PROPERTY = "readproportion";
/**
* The default proportion of transactions that are reads.
*/
public static final String READ_PROPORTION_PROPERTY_DEFAULT = "0.95";
/**
* The name of the property for the proportion of transactions that are updates.
*/
public static final String UPDATE_PROPORTION_PROPERTY = "updateproportion";
/**
* The default proportion of transactions that are updates.
*/
public static final String UPDATE_PROPORTION_PROPERTY_DEFAULT = "0.05";
/**
* The name of the property for the proportion of transactions that are inserts.
*/
public static final String INSERT_PROPORTION_PROPERTY = "insertproportion";
/**
* The default proportion of transactions that are inserts.
*/
public static final String INSERT_PROPORTION_PROPERTY_DEFAULT = "0.0";
/**
* The name of the property for the proportion of transactions that are scans.
*/
public static final String SCAN_PROPORTION_PROPERTY = "scanproportion";
/**
* The default proportion of transactions that are scans.
*/
public static final String SCAN_PROPORTION_PROPERTY_DEFAULT = "0.0";
/**
* The name of the property for the proportion of transactions that are read-modify-write.
*/
public static final String READMODIFYWRITE_PROPORTION_PROPERTY = "readmodifywriteproportion";
/**
* The default proportion of transactions that are scans.
*/
public static final String READMODIFYWRITE_PROPORTION_PROPERTY_DEFAULT = "0.0";
/**
* The name of the property for the the distribution of requests across the keyspace. Options are
* "uniform", "zipfian" and "latest"
*/
public static final String REQUEST_DISTRIBUTION_PROPERTY = "requestdistribution";
/**
* The default distribution of requests across the keyspace.
*/
public static final String REQUEST_DISTRIBUTION_PROPERTY_DEFAULT = "uniform";
/**
* The name of the property for adding zero padding to record numbers in order to match
* string sort order. Controls the number of 0s to left pad with.
*/
public static final String ZERO_PADDING_PROPERTY = "zeropadding";
/**
* The default zero padding value. Matches integer sort order
*/
public static final String ZERO_PADDING_PROPERTY_DEFAULT = "1";
/**
* The name of the property for the min scan length (number of records).
*/
public static final String MIN_SCAN_LENGTH_PROPERTY = "minscanlength";
/**
* The default min scan length.
*/
public static final String MIN_SCAN_LENGTH_PROPERTY_DEFAULT = "1";
/**
* The name of the property for the max scan length (number of records).
*/
public static final String MAX_SCAN_LENGTH_PROPERTY = "maxscanlength";
/**
* The default max scan length.
*/
public static final String MAX_SCAN_LENGTH_PROPERTY_DEFAULT = "1000";
/**
* The name of the property for the scan length distribution. Options are "uniform" and "zipfian"
* (favoring short scans)
*/
public static final String SCAN_LENGTH_DISTRIBUTION_PROPERTY = "scanlengthdistribution";
/**
* The default max scan length.
*/
public static final String SCAN_LENGTH_DISTRIBUTION_PROPERTY_DEFAULT = "uniform";
/**
* The name of the property for the order to insert records. Options are "ordered" or "hashed"
*/
public static final String INSERT_ORDER_PROPERTY = "insertorder";
/**
* Default insert order.
*/
public static final String INSERT_ORDER_PROPERTY_DEFAULT = "hashed";
/**
* Percentage data items that constitute the hot set.
*/
public static final String HOTSPOT_DATA_FRACTION = "hotspotdatafraction";
/**
* Default value of the size of the hot set.
*/
public static final String HOTSPOT_DATA_FRACTION_DEFAULT = "0.2";
/**
* Percentage operations that access the hot set.
*/
public static final String HOTSPOT_OPN_FRACTION = "hotspotopnfraction";
/**
* Default value of the percentage operations accessing the hot set.
*/
public static final String HOTSPOT_OPN_FRACTION_DEFAULT = "0.8";
/**
* How many times to retry when insertion of a single item to a DB fails.
*/
public static final String INSERTION_RETRY_LIMIT = "core_workload_insertion_retry_limit";
public static final String INSERTION_RETRY_LIMIT_DEFAULT = "0";
/**
* On average, how long to wait between the retries, in seconds.
*/
public static final String INSERTION_RETRY_INTERVAL = "core_workload_insertion_retry_interval";
public static final String INSERTION_RETRY_INTERVAL_DEFAULT = "3";
/**
* Field name prefix.
*/
public static final String FIELD_NAME_PREFIX = "fieldnameprefix";
/**
* Default value of the field name prefix.
*/
public static final String FIELD_NAME_PREFIX_DEFAULT = "field";
private static final String DATA_FILE = "datafile";
private static final String DATA_FILE_DEFAULT = "/data/publicdata/wikipedia/wikipedia.txt";
private static String datapath;
public static String getDataFile() {
return datapath;
}
// private static final int DATA_LENGTH = 1024; // 每个数据块的大小为1KB
// private static byte[] fileData; // 存储文件的所有字节
// private static int totalBytesRead; // 文件中实际读取到的总字节数
protected NumberGenerator keysequence;
protected DiscreteGenerator operationchooser;
protected NumberGenerator keychooser;
protected NumberGenerator fieldchooser;
protected AcknowledgedCounterGenerator transactioninsertkeysequence;
protected NumberGenerator scanlength;
protected boolean orderedinserts;
protected long fieldcount;
protected long recordcount;
protected int zeropadding;
protected int insertionRetryLimit;
protected int insertionRetryInterval;
protected FileGenerator fg;
private Measurements measurements = Measurements.getMeasurements();
public static String buildKeyName(long keynum, int zeropadding, boolean orderedinserts) {
if (!orderedinserts) {
keynum = Utils.hash(keynum);
}
String value = Long.toString(keynum);
int fill = zeropadding - value.length();
String prekey = "user";
for (int i = 0; i < fill; i++) {
prekey += '0';
}
return prekey + value;
}
protected static NumberGenerator getFieldLengthGenerator(Properties p) throws WorkloadException {
NumberGenerator fieldlengthgenerator;
String fieldlengthdistribution = p.getProperty(
FIELD_LENGTH_DISTRIBUTION_PROPERTY, FIELD_LENGTH_DISTRIBUTION_PROPERTY_DEFAULT);
int fieldlength =
Integer.parseInt(p.getProperty(FIELD_LENGTH_PROPERTY, FIELD_LENGTH_PROPERTY_DEFAULT));
int minfieldlength =
Integer.parseInt(p.getProperty(MIN_FIELD_LENGTH_PROPERTY, MIN_FIELD_LENGTH_PROPERTY_DEFAULT));
String fieldlengthhistogram = p.getProperty(
FIELD_LENGTH_HISTOGRAM_FILE_PROPERTY, FIELD_LENGTH_HISTOGRAM_FILE_PROPERTY_DEFAULT);
if (fieldlengthdistribution.compareTo("constant") == 0) {
fieldlengthgenerator = new ConstantIntegerGenerator(fieldlength);
} else if (fieldlengthdistribution.compareTo("uniform") == 0) {
fieldlengthgenerator = new UniformLongGenerator(minfieldlength, fieldlength);
} else if (fieldlengthdistribution.compareTo("zipfian") == 0) {
fieldlengthgenerator = new ZipfianGenerator(minfieldlength, fieldlength);
} else if (fieldlengthdistribution.compareTo("histogram") == 0) {
try {
fieldlengthgenerator = new HistogramGenerator(fieldlengthhistogram);
} catch (IOException e) {
throw new WorkloadException(
"Couldn't read field length histogram file: " + fieldlengthhistogram, e);
}
} else {
throw new WorkloadException(
"Unknown field length distribution \"" + fieldlengthdistribution + "\"");
}
return fieldlengthgenerator;
}
// private static final ThreadLocal<byte[]> THREAD_LOCAL_FILE_DATA = ThreadLocal.withInitial(() -> {
// try {
// return Files.readAllBytes(Paths.get(datapath));
// } catch (IOException e) {
// throw new RuntimeException("Failed to read data from file: " + datapath, e);
// }
// });
// private static final ThreadLocal<Integer> THREAD_LOCAL_TOTAL_BYTES_READ =
// ThreadLocal.withInitial(() -> THREAD_LOCAL_FILE_DATA.get().length);
// public static byte[] getThreadLocalFileData() {
// return THREAD_LOCAL_FILE_DATA.get();
// }
// public static int getThreadLocalTotalBytesRead() {
// return THREAD_LOCAL_TOTAL_BYTES_READ.get();
// }
/**
* Initialize the scenario.
* Called once, in the main client thread, before any operations are started.
*/
@Override
public void init(Properties p) throws WorkloadException {
table = p.getProperty(TABLENAME_PROPERTY, TABLENAME_PROPERTY_DEFAULT);
datapath = p.getProperty(DATA_FILE, DATA_FILE_DEFAULT);
// try {
// // 在类加载时初始化并读取文件内容到内存中
// fileData = Files.readAllBytes(Paths.get(datapath));
// totalBytesRead = fileData.length;
// } catch (IOException e) {
// throw new RuntimeException("Failed to read data from file: " + datapath, e);
// }
// fileData = getThreadLocalFileData();
// totalBytesRead = getThreadLocalTotalBytesRead();
fieldcount =
Long.parseLong(p.getProperty(FIELD_COUNT_PROPERTY, FIELD_COUNT_PROPERTY_DEFAULT));
final String fieldnameprefix = p.getProperty(FIELD_NAME_PREFIX, FIELD_NAME_PREFIX_DEFAULT);
fieldnames = new ArrayList<>();
for (int i = 0; i < fieldcount; i++) {
fieldnames.add(fieldnameprefix + i);
}
fieldlengthgenerator = MyWorkload.getFieldLengthGenerator(p);
recordcount =
Long.parseLong(p.getProperty(Client.RECORD_COUNT_PROPERTY, Client.DEFAULT_RECORD_COUNT));
if (recordcount == 0) {
recordcount = Integer.MAX_VALUE;
}
String requestdistrib =
p.getProperty(REQUEST_DISTRIBUTION_PROPERTY, REQUEST_DISTRIBUTION_PROPERTY_DEFAULT);
int minscanlength =
Integer.parseInt(p.getProperty(MIN_SCAN_LENGTH_PROPERTY, MIN_SCAN_LENGTH_PROPERTY_DEFAULT));
int maxscanlength =
Integer.parseInt(p.getProperty(MAX_SCAN_LENGTH_PROPERTY, MAX_SCAN_LENGTH_PROPERTY_DEFAULT));
String scanlengthdistrib =
p.getProperty(SCAN_LENGTH_DISTRIBUTION_PROPERTY, SCAN_LENGTH_DISTRIBUTION_PROPERTY_DEFAULT);
long insertstart =
Long.parseLong(p.getProperty(INSERT_START_PROPERTY, INSERT_START_PROPERTY_DEFAULT));
long insertcount=
Integer.parseInt(p.getProperty(INSERT_COUNT_PROPERTY, String.valueOf(recordcount - insertstart)));
// Confirm valid values for insertstart and insertcount in relation to recordcount
if (recordcount < (insertstart + insertcount)) {
System.err.println("Invalid combination of insertstart, insertcount and recordcount.");
System.err.println("recordcount must be bigger than insertstart + insertcount.");
System.exit(-1);
}
zeropadding =
Integer.parseInt(p.getProperty(ZERO_PADDING_PROPERTY, ZERO_PADDING_PROPERTY_DEFAULT));
readallfields = Boolean.parseBoolean(
p.getProperty(READ_ALL_FIELDS_PROPERTY, READ_ALL_FIELDS_PROPERTY_DEFAULT));
readallfieldsbyname = Boolean.parseBoolean(
p.getProperty(READ_ALL_FIELDS_BY_NAME_PROPERTY, READ_ALL_FIELDS_BY_NAME_PROPERTY_DEFAULT));
writeallfields = Boolean.parseBoolean(
p.getProperty(WRITE_ALL_FIELDS_PROPERTY, WRITE_ALL_FIELDS_PROPERTY_DEFAULT));
dataintegrity = Boolean.parseBoolean(
p.getProperty(DATA_INTEGRITY_PROPERTY, DATA_INTEGRITY_PROPERTY_DEFAULT));
// Confirm that fieldlengthgenerator returns a constant if data
// integrity check requested.
if (dataintegrity && !(p.getProperty(
FIELD_LENGTH_DISTRIBUTION_PROPERTY,
FIELD_LENGTH_DISTRIBUTION_PROPERTY_DEFAULT)).equals("constant")) {
System.err.println("Must have constant field size to check data integrity.");
System.exit(-1);
}
if (dataintegrity) {
System.out.println("Data integrity is enabled.");
}
if (p.getProperty(INSERT_ORDER_PROPERTY, INSERT_ORDER_PROPERTY_DEFAULT).compareTo("hashed") == 0) {
orderedinserts = false;
} else {
orderedinserts = true;
}
keysequence = new CounterGenerator(insertstart);
operationchooser = createOperationGenerator(p);
transactioninsertkeysequence = new AcknowledgedCounterGenerator(recordcount);
if (requestdistrib.compareTo("uniform") == 0) {
keychooser = new UniformLongGenerator(insertstart, insertstart + insertcount - 1);
} else if (requestdistrib.compareTo("exponential") == 0) {
double percentile = Double.parseDouble(p.getProperty(
ExponentialGenerator.EXPONENTIAL_PERCENTILE_PROPERTY,
ExponentialGenerator.EXPONENTIAL_PERCENTILE_DEFAULT));
double frac = Double.parseDouble(p.getProperty(
ExponentialGenerator.EXPONENTIAL_FRAC_PROPERTY,
ExponentialGenerator.EXPONENTIAL_FRAC_DEFAULT));
keychooser = new ExponentialGenerator(percentile, recordcount * frac);
} else if (requestdistrib.compareTo("sequential") == 0) {
keychooser = new SequentialGenerator(insertstart, insertstart + insertcount - 1);
} else if (requestdistrib.compareTo("zipfian") == 0) {
// it does this by generating a random "next key" in part by taking the modulus over the
// number of keys.
// If the number of keys changes, this would shift the modulus, and we don't want that to
// change which keys are popular so we'll actually construct the scrambled zipfian generator
// with a keyspace that is larger than exists at the beginning of the test. that is, we'll predict
// the number of inserts, and tell the scrambled zipfian generator the number of existing keys
// plus the number of predicted keys as the total keyspace. then, if the generator picks a key
// that hasn't been inserted yet, will just ignore it and pick another key. this way, the size of
// the keyspace doesn't change from the perspective of the scrambled zipfian generator
final double insertproportion = Double.parseDouble(
p.getProperty(INSERT_PROPORTION_PROPERTY, INSERT_PROPORTION_PROPERTY_DEFAULT));
int opcount = Integer.parseInt(p.getProperty(Client.OPERATION_COUNT_PROPERTY));
int expectednewkeys = (int) ((opcount) * insertproportion * 2.0); // 2 is fudge factor
keychooser = new ScrambledZipfianGenerator(insertstart, insertstart + insertcount + expectednewkeys);
} else if (requestdistrib.compareTo("latest") == 0) {
keychooser = new SkewedLatestGenerator(transactioninsertkeysequence);
} else if (requestdistrib.equals("hotspot")) {
double hotsetfraction =
Double.parseDouble(p.getProperty(HOTSPOT_DATA_FRACTION, HOTSPOT_DATA_FRACTION_DEFAULT));
double hotopnfraction =
Double.parseDouble(p.getProperty(HOTSPOT_OPN_FRACTION, HOTSPOT_OPN_FRACTION_DEFAULT));
keychooser = new HotspotIntegerGenerator(insertstart, insertstart + insertcount - 1,
hotsetfraction, hotopnfraction);
} else {
throw new WorkloadException("Unknown request distribution \"" + requestdistrib + "\"");
}
fieldchooser = new UniformLongGenerator(0, fieldcount - 1);
if (scanlengthdistrib.compareTo("uniform") == 0) {
scanlength = new UniformLongGenerator(minscanlength, maxscanlength);
} else if (scanlengthdistrib.compareTo("zipfian") == 0) {
scanlength = new ZipfianGenerator(minscanlength, maxscanlength);
} else {
throw new WorkloadException(
"Distribution \"" + scanlengthdistrib + "\" not allowed for scan length");
}
fg = new FileGenerator(datapath);
insertionRetryLimit = Integer.parseInt(p.getProperty(
INSERTION_RETRY_LIMIT, INSERTION_RETRY_LIMIT_DEFAULT));
insertionRetryInterval = Integer.parseInt(p.getProperty(
INSERTION_RETRY_INTERVAL, INSERTION_RETRY_INTERVAL_DEFAULT));
}
/**
* Builds a value for a randomly chosen field.
*/
private HashMap<String, ByteIterator> buildSingleValue(String key) {
HashMap<String, ByteIterator> value = new HashMap<>();
String fieldkey = fieldnames.get(fieldchooser.nextValue().intValue());
ByteIterator data;
if (dataintegrity) {
data = new StringByteIterator(buildDeterministicValue(key, fieldkey));
} else {
// byte[] dataBlock = getNextDataBlock(0);
// data = new ByteArrayByteIterator(dataBlock);
// data = new RandomByteIterator(fieldlengthgenerator.nextValue().longValue());
data = new StringByteIterator(fg.nextValue());
}
value.put(fieldkey, data);
return value;
}
/**
* Builds values for all fields.
*/
private HashMap<String, ByteIterator> buildValues(String key) {
HashMap<String, ByteIterator> values = new HashMap<>();
int offset = 0;
for (String fieldkey : fieldnames) {
ByteIterator data;
if (dataintegrity) {
data = new StringByteIterator(buildDeterministicValue(key, fieldkey));
} else {
// fill with random data
// data = new RandomByteIterator(fieldlengthgenerator.nextValue().longValue());
// int len = fieldlengthgenerator.nextValue().longValue();
// byte[] dataBlock = getNextDataBlock(offset);
// offset += DATA_LENGTH;
// if (offset >= totalBytesRead) {
// offset = 0;
// }
data = new StringByteIterator(fg.nextValue());
}
values.put(fieldkey, data);
}
return values;
}
// private byte[] getNextDataBlock(int offset) {
// byte[] dataBlock = new byte[DATA_LENGTH];
// // 如果偏移量在文件范围内
// if (offset < totalBytesRead) {
// int remainingBytes = totalBytesRead - offset;
// // 如果文件剩余数据大于或等于一个数据块，直接复制数据
// if (remainingBytes >= DATA_LENGTH) {
// System.arraycopy(fileData, offset, dataBlock, 0, DATA_LENGTH);
// } else {
// // 如果文件剩余数据小于一个数据块，则重复最后一个完整的数据块填充
// int lastCompleteOffset = (totalBytesRead / DATA_LENGTH) * DATA_LENGTH;
// for (int i = 0; i < DATA_LENGTH; i++) {
// dataBlock[i] = fileData[(lastCompleteOffset + i) % totalBytesRead];
// }
// }
// } else {
// // 如果超出文件末尾，回绕到文件开头
// System.arraycopy(fileData, 0, dataBlock, 0, DATA_LENGTH);
// }
// return dataBlock;
// }
/**
* Build a deterministic value given the key information.
*/
private String buildDeterministicValue(String key, String fieldkey) {
int size = fieldlengthgenerator.nextValue().intValue();
StringBuilder sb = new StringBuilder(size);
sb.append(key);
sb.append(':');
sb.append(fieldkey);
while (sb.length() < size) {
sb.append(':');
sb.append(sb.toString().hashCode());
}
sb.setLength(size);
return sb.toString();
}
/**
* Do one insert operation. Because it will be called concurrently from multiple client threads,
* this function must be thread safe. However, avoid synchronized, or the threads will block waiting
* for each other, and it will be difficult to reach the target throughput. Ideally, this function would
* have no side effects other than DB operations.
*/
@Override
public boolean doInsert(DB db, Object threadstate) {
int keynum = keysequence.nextValue().intValue();
String dbkey = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
HashMap<String, ByteIterator> values = buildValues(dbkey);
Status status;
int numOfRetries = 0;
do {
status = db.insert(table, dbkey, values);
if (null != status && status.isOk()) {
break;
}
// Retry if configured. Without retrying, the load process will fail
// even if one single insertion fails. User can optionally configure
// an insertion retry limit (default is 0) to enable retry.
if (++numOfRetries <= insertionRetryLimit) {
System.err.println("Retrying insertion, retry count: " + numOfRetries);
try {
// Sleep for a random number between [0.8, 1.2)*insertionRetryInterval.
int sleepTime = (int) (1000 * insertionRetryInterval * (0.8 + 0.4 * Math.random()));
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
break;
}
} else {
System.err.println("Error inserting, not retrying any more. number of attempts: " + numOfRetries +
"Insertion Retry Limit: " + insertionRetryLimit);
break;
}
} while (true);
return null != status && status.isOk();
}
/**
* Do one transaction operation. Because it will be called concurrently from multiple client
* threads, this function must be thread safe. However, avoid synchronized, or the threads will block waiting
* for each other, and it will be difficult to reach the target throughput. Ideally, this function would
* have no side effects other than DB operations.
*/
@Override
public boolean doTransaction(DB db, Object threadstate) {
String operation = operationchooser.nextString();
if(operation == null) {
return false;
}
switch (operation) {
case "READ":
doTransactionRead(db);
break;
case "UPDATE":
doTransactionUpdate(db);
break;
case "INSERT":
doTransactionInsert(db);
break;
case "SCAN":
doTransactionScan(db);
break;
default:
doTransactionReadModifyWrite(db);
}
return true;
}
/**
* Results are reported in the first three buckets of the histogram under
* the label "VERIFY".
* Bucket 0 means the expected data was returned.
* Bucket 1 means incorrect data was returned.
* Bucket 2 means null data was returned when some data was expected.
*/
protected void verifyRow(String key, HashMap<String, ByteIterator> cells) {
Status verifyStatus = Status.OK;
long startTime = System.nanoTime();
if (!cells.isEmpty()) {
for (Map.Entry<String, ByteIterator> entry : cells.entrySet()) {
if (!entry.getValue().toString().equals(buildDeterministicValue(key, entry.getKey()))) {
verifyStatus = Status.UNEXPECTED_STATE;
break;
}
}
} else {
// This assumes that null data is never valid
verifyStatus = Status.ERROR;
}
long endTime = System.nanoTime();
measurements.measure("VERIFY", (int) (endTime - startTime) / 1000);
measurements.reportStatus("VERIFY", verifyStatus);
}
long nextKeynum() {
long keynum;
if (keychooser instanceof ExponentialGenerator) {
do {
keynum = transactioninsertkeysequence.lastValue() - keychooser.nextValue().intValue();
} while (keynum < 0);
} else {
do {
keynum = keychooser.nextValue().intValue();
} while (keynum > transactioninsertkeysequence.lastValue());
}
return keynum;
}
public void doTransactionRead(DB db) {
// choose a random key
long keynum = nextKeynum();
String keyname = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
HashSet<String> fields = null;
if (!readallfields) {
// read a random field
String fieldname = fieldnames.get(fieldchooser.nextValue().intValue());
fields = new HashSet<String>();
fields.add(fieldname);
} else if (dataintegrity || readallfieldsbyname) {
// pass the full field list if dataintegrity is on for verification
fields = new HashSet<String>(fieldnames);
}
HashMap<String, ByteIterator> cells = new HashMap<String, ByteIterator>();
db.read(table, keyname, fields, cells);
if (dataintegrity) {
verifyRow(keyname, cells);
}
}
public void doTransactionReadModifyWrite(DB db) {
// choose a random key
long keynum = nextKeynum();
String keyname = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
HashSet<String> fields = null;
if (!readallfields) {
// read a random field
String fieldname = fieldnames.get(fieldchooser.nextValue().intValue());
fields = new HashSet<String>();
fields.add(fieldname);
}
HashMap<String, ByteIterator> values;
if (writeallfields) {
// new data for all the fields
values = buildValues(keyname);
} else {
// update a random field
values = buildSingleValue(keyname);
}
// do the transaction
HashMap<String, ByteIterator> cells = new HashMap<String, ByteIterator>();
long ist = measurements.getIntendedStartTimeNs();
long st = System.nanoTime();
db.read(table, keyname, fields, cells);
db.update(table, keyname, values);
long en = System.nanoTime();
if (dataintegrity) {
verifyRow(keyname, cells);
}
measurements.measure("READ-MODIFY-WRITE", (int) ((en - st) / 1000));
measurements.measureIntended("READ-MODIFY-WRITE", (int) ((en - ist) / 1000));
}
public void doTransactionScan(DB db) {
// choose a random key
long keynum = nextKeynum();
String startkeyname = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
// choose a random scan length
int len = scanlength.nextValue().intValue();
HashSet<String> fields = null;
if (!readallfields) {
// read a random field
String fieldname = fieldnames.get(fieldchooser.nextValue().intValue());
fields = new HashSet<String>();
fields.add(fieldname);
}
db.scan(table, startkeyname, len, fields, new Vector<HashMap<String, ByteIterator>>());
}
public void doTransactionUpdate(DB db) {
// choose a random key
long keynum = nextKeynum();
String keyname = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
HashMap<String, ByteIterator> values;
if (writeallfields) {
// new data for all the fields
values = buildValues(keyname);
} else {
// update a random field
values = buildSingleValue(keyname);
}
db.update(table, keyname, values);
}
public void doTransactionInsert(DB db) {
// choose the next key
long keynum = transactioninsertkeysequence.nextValue();
try {
String dbkey = MyWorkload.buildKeyName(keynum, zeropadding, orderedinserts);
HashMap<String, ByteIterator> values = buildValues(dbkey);
db.insert(table, dbkey, values);
} finally {
transactioninsertkeysequence.acknowledge(keynum);
}
}
/**
* Creates a weighted discrete values with database operations for a workload to perform.
* Weights/proportions are read from the properties list and defaults are used
* when values are not configured.
* Current operations are "READ", "UPDATE", "INSERT", "SCAN" and "READMODIFYWRITE".
*
* @param p The properties list to pull weights from.
* @return A generator that can be used to determine the next operation to perform.
* @throws IllegalArgumentException if the properties object was null.
*/
protected static DiscreteGenerator createOperationGenerator(final Properties p) {
if (p == null) {
throw new IllegalArgumentException("Properties object cannot be null");
}
final double readproportion = Double.parseDouble(
p.getProperty(READ_PROPORTION_PROPERTY, READ_PROPORTION_PROPERTY_DEFAULT));
final double updateproportion = Double.parseDouble(
p.getProperty(UPDATE_PROPORTION_PROPERTY, UPDATE_PROPORTION_PROPERTY_DEFAULT));
final double insertproportion = Double.parseDouble(
p.getProperty(INSERT_PROPORTION_PROPERTY, INSERT_PROPORTION_PROPERTY_DEFAULT));
final double scanproportion = Double.parseDouble(
p.getProperty(SCAN_PROPORTION_PROPERTY, SCAN_PROPORTION_PROPERTY_DEFAULT));
final double readmodifywriteproportion = Double.parseDouble(p.getProperty(
READMODIFYWRITE_PROPORTION_PROPERTY, READMODIFYWRITE_PROPORTION_PROPERTY_DEFAULT));
final DiscreteGenerator operationchooser = new DiscreteGenerator();
if (readproportion > 0) {
operationchooser.addValue(readproportion, "READ");
}
if (updateproportion > 0) {
operationchooser.addValue(updateproportion, "UPDATE");
}
if (insertproportion > 0) {
operationchooser.addValue(insertproportion, "INSERT");
}
if (scanproportion > 0) {
operationchooser.addValue(scanproportion, "SCAN");
}
if (readmodifywriteproportion > 0) {
operationchooser.addValue(readmodifywriteproportion, "READMODIFYWRITE");
}
return operationchooser;
}
}
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