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https://issues.apache.org/jira/browse/HADOOP-15027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16320103#comment-16320103
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wujinhu edited comment on HADOOP-15027 at 1/10/18 11:28 AM:
------------------------------------------------------------
Change some default configuration.
{code:java}
- public static final long MULTIPART_DOWNLOAD_SIZE_DEFAULT = 1024 * 1024;
+ public static final long MULTIPART_DOWNLOAD_SIZE_DEFAULT = 512 * 1024;
public static final String MULTIPART_DOWNLOAD_THREAD_NUMBER_KEY =
"fs.oss.multipart.download.threads";
- public static final int MULTIPART_DOWNLOAD_THREAD_NUMBER_DEFAULT = 16;
+ public static final int MULTIPART_DOWNLOAD_THREAD_NUMBER_DEFAULT = 10;
public static final String MAX_TOTAL_TASKS_KEY = "fs.oss.max.total.tasks";
public static final int MAX_TOTAL_TASKS_DEFAULT = 128;
public static final String MULTIPART_DOWNLOAD_AHEAD_PART_MAX_NUM_KEY =
"fs.oss.multipart.download.ahead.part.max.number";
- public static final int MULTIPART_DOWNLOAD_AHEAD_PART_MAX_NUM_DEFAULT = 8;
+ public static final int MULTIPART_DOWNLOAD_AHEAD_PART_MAX_NUM_DEFAULT = 4;
{code}
was (Author: wujinhu):
Change some default configuration.
{code:java}
474c474
< index dd71842fb87..dedc038f3f7 100644
---
> index dd71842fb87..a1070277d33 100644
482c482
< + public static final long MULTIPART_DOWNLOAD_SIZE_DEFAULT = 512 * 1024;
---
> + public static final long MULTIPART_DOWNLOAD_SIZE_DEFAULT = 1024 * 1024;
486c486
< + public static final int MULTIPART_DOWNLOAD_THREAD_NUMBER_DEFAULT = 10;
---
> + public static final int MULTIPART_DOWNLOAD_THREAD_NUMBER_DEFAULT = 16;
493c493
< + public static final int MULTIPART_DOWNLOAD_AHEAD_PART_MAX_NUM_DEFAULT = 4;
---
> + public static final int MULTIPART_DOWNLOAD_AHEAD_PART_MAX_NUM_DEFAULT = 8;
{code}
> AliyunOSS: Support multi-thread pre-read to improve read from Hadoop to
> Aliyun OSS performance
> ----------------------------------------------------------------------------------------------
>
> Key: HADOOP-15027
> URL: https://issues.apache.org/jira/browse/HADOOP-15027
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/oss
> Affects Versions: 3.0.0
> Reporter: wujinhu
> Assignee: wujinhu
> Attachments: HADOOP-15027.001.patch, HADOOP-15027.002.patch,
> HADOOP-15027.003.patch, HADOOP-15027.004.patch, HADOOP-15027.005.patch,
> HADOOP-15027.006.patch, HADOOP-15027.007.patch, HADOOP-15027.008.patch,
> HADOOP-15027.009.patch, HADOOP-15027.010.patch, HADOOP-15027.011.patch,
> HADOOP-15027.012.patch
>
>
> Currently, AliyunOSSInputStream uses single thread to read data from
> AliyunOSS, so we can do some refactoring by using multi-thread pre-read to
> improve read performance.
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