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https://issues.apache.org/jira/browse/HDDS-1530?focusedWorklogId=245591&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-245591
]
ASF GitHub Bot logged work on HDDS-1530:
----------------------------------------
Author: ASF GitHub Bot
Created on: 20/May/19 21:49
Start Date: 20/May/19 21:49
Worklog Time Spent: 10m
Work Description: arp7 commented on 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_r285780568
##########
File path:
hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java
##########
@@ -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));
Review comment:
Let's just write zeroes by default. Random data generation may itself become
a bottleneck. We could add. a separate option for random data later.
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Issue Time Tracking
-------------------
Worklog Id: (was: 245591)
Time Spent: 50m (was: 40m)
> Ozone: Freon: Support big files larger than 2GB and add "--bufferSize" and
> "--validateWrites" options.
> ------------------------------------------------------------------------------------------------------
>
> Key: HDDS-1530
> URL: https://issues.apache.org/jira/browse/HDDS-1530
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: test
> Reporter: Xudong Cao
> Assignee: Xudong Cao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> *Current problems:*
> 1. Freon does not support big files larger than 2GB because it use an int
> type "keySize" parameter and also "keyValue" buffer size.
> 2. Freon allocates a entire buffer for each key at once, so if the key size
> is large and the concurrency is high, freon will report OOM exception
> frequently.
> 3. Freon lacks option such as "--validateWrites", thus users cannot manually
> specify that verification is required after writing.
> *Some solutions:*
> 1. Use a long type "keySize" parameter, make sure freon can support big
> files larger than 2GB.
> 2. Use a small buffer repeatedly than allocating the entire key-size buffer
> at once, the default buffer size is 4K and can be configured by "–bufferSize"
> parameter.
> 3. Add a "--validateWrites" option to Freon command line, users can provide
> this option to indicate that a validation is required after write.
>
>
>
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