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https://issues.apache.org/jira/browse/HADOOP-14520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Georgi Chalakov updated HADOOP-14520:
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Description:
Block Compaction for WASB allows uploading new blocks for every hflush/hsync
call. When the number of blocks is above a predefined, configurable value, next
hflush/hsync triggers the block compaction process. Block compaction replaces a
sequence of blocks with one block. From all the sequences with total length
less than 4M, compaction chooses the longest one. It is a greedy algorithm that
preserve all potential candidates for the next round. Block Compaction for WASB
increases data durability and allows using block blobs instead of page blobs.
By default, block compaction is disabled. Similar to the configuration for page
blobs, the client needs to specify HDFS folders where block compaction over
block blobs is enabled.
Results for HADOOP-14520-01.patch
Tests run: 704, Failures: 0, Errors: 0, Skipped: 119
was:
Block Compaction for WASB allows uploading new blocks for every hflush/hsync
call. When the number of blocks is above a predefined, configurable value, next
hflush/hsync triggers the block compaction process. Block compaction replaces a
sequence of blocks with one block. From all the sequences with total length
less than 4M, compaction chooses the longest one. It is a greedy algorithm that
preserve all potential candidates for the next round. Block Compaction for WASB
increases data durability and allows using block blobs instead of page blobs.
By default, block compaction is disabled. Similar to the configuration for page
blobs, the client needs to specify HDFS folders where block compaction over
block blobs is enabled.
> Block compaction for WASB
> -------------------------
>
> Key: HADOOP-14520
> URL: https://issues.apache.org/jira/browse/HADOOP-14520
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/azure
> Affects Versions: 3.0.0-alpha3
> Reporter: Georgi Chalakov
> Assignee: Georgi Chalakov
> Attachments: HADOOP-14520-01.patch, HADOOP-14520-01-test.txt
>
>
> Block Compaction for WASB allows uploading new blocks for every hflush/hsync
> call. When the number of blocks is above a predefined, configurable value,
> next hflush/hsync triggers the block compaction process. Block compaction
> replaces a sequence of blocks with one block. From all the sequences with
> total length less than 4M, compaction chooses the longest one. It is a greedy
> algorithm that preserve all potential candidates for the next round. Block
> Compaction for WASB increases data durability and allows using block blobs
> instead of page blobs. By default, block compaction is disabled. Similar to
> the configuration for page blobs, the client needs to specify HDFS folders
> where block compaction over block blobs is enabled.
> Results for HADOOP-14520-01.patch
> Tests run: 704, Failures: 0, Errors: 0, Skipped: 119
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