xiaoyuyao commented on a change in pull request #830: HDDS-1530. Freon support
big files larger than 2GB and add --bufferSize and --validateWrites options.
URL: https://github.com/apache/hadoop/pull/830#discussion_r285312730
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File path:
hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java
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@@ -228,8 +243,20 @@ public Void call() throws Exception {
init(freon.createOzoneConfiguration());
}
- keyValue =
- DFSUtil.string2Bytes(RandomStringUtils.randomAscii(keySize - 36));
+ keyValueBuffer = DFSUtil.string2Bytes(
+ RandomStringUtils.randomAscii(bufferSize));
+
+ // Compute the common initial digest for all keys without their UUID
+ if (validateWrites) {
+ commonInitialMD = DigestUtils.getDigest(DIGEST_ALGORITHM);
+ int uuidLength = UUID.randomUUID().toString().length();
+ keySize = Math.max(uuidLength, keySize);
+ for (long nrRemaining = keySize - uuidLength; nrRemaining > 0;
+ nrRemaining -= bufferSize) {
+ int curSize = (int)Math.min(bufferSize, nrRemaining);
+ commonInitialMD.update(keyValueBuffer, 0, curSize);
Review comment:
The keyValueBuffer is only generated randomly once before the loop.
Repeatedly calculate the same content won't change the digest here. Some of the
commonInitalMD.update() cycles can be saved here.
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