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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line.33">LoadTestKVGenerator</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">A generator of random keys and values for load testing. Keys are generated |
| by converting numeric indexes to strings and prefixing them with an MD5 |
| hash. Values are generated by selecting value size in the configured range |
| and generating a pseudo-random sequence of bytes seeded by key, column |
| qualifier, and value size.</div> |
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| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#LOG">LOG</a></span></code> </td> |
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| <td class="colFirst"><code>private static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#logLimit">logLimit</a></span></code> </td> |
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| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#maxValueSize">maxValueSize</a></span></code> </td> |
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| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#minValueSize">minValueSize</a></span></code> </td> |
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| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#randomForValueSize">randomForValueSize</a></span></code> |
| <div class="block">A random number generator for determining value size</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#LoadTestKVGenerator-int-int-">LoadTestKVGenerator</a></span>(int minValueSize, |
| int maxValueSize)</code> </td> |
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| <td class="colFirst"><code>byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#generateRandomSizeValue-byte:A...-">generateRandomSizeValue</a></span>(byte[]... seedStrings)</code> |
| <div class="block">Generates a value for the given key index and column qualifier.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private static byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#getValueForRowColumn-int-byte:A...-">getValueForRowColumn</a></span>(int dataSize, |
| byte[]... seedStrings)</code> |
| <div class="block">Generates random bytes of the given size for the given row and column |
| qualifier.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#md5PrefixedKey-long-">md5PrefixedKey</a></span>(long key)</code> |
| <div class="block">Converts the given key to string, and prefixes it with the MD5 hash of |
| the index's string representation.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#verify-byte:A-byte:A...-">verify</a></span>(byte[] value, |
| byte[]... seedStrings)</code> |
| <div class="block">Verifies that the given byte array is the same as what would be generated |
| for the given seed strings (row/cf/column/...).</div> |
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| <div class="block">A random number generator for determining value size</div> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line.44">LoadTestKVGenerator</a>(int minValueSize, |
| int maxValueSize)</pre> |
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| <pre>public static boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line.60">verify</a>(byte[] value, |
| byte[]... seedStrings)</pre> |
| <div class="block">Verifies that the given byte array is the same as what would be generated |
| for the given seed strings (row/cf/column/...). We are assuming that the |
| value size is correct, and only verify the actual bytes. However, if the |
| min/max value sizes are set sufficiently high, an accidental match should be |
| extremely improbable.</div> |
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| <div class="block">Converts the given key to string, and prefixes it with the MD5 hash of |
| the index's string representation.</div> |
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| <pre>public byte[] <a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line.93">generateRandomSizeValue</a>(byte[]... seedStrings)</pre> |
| <div class="block">Generates a value for the given key index and column qualifier. Size is |
| selected randomly in the configured range. The generated value depends |
| only on the combination of the strings passed (key/cf/column/...) and the selected |
| value size. This allows to verify the actual value bytes when reading, as done |
| in {#verify(byte[], byte[]...)} |
| This method is as thread-safe as Random class. It appears that the worst bug ever |
| found with the latter is that multiple threads will get some duplicate values, which |
| we don't care about.</div> |
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| <pre>private static byte[] <a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line.105">getValueForRowColumn</a>(int dataSize, |
| byte[]... seedStrings)</pre> |
| <div class="block">Generates random bytes of the given size for the given row and column |
| qualifier. The random seed is fully determined by these parameters.</div> |
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