[jira] [Updated] (HDFS-7348) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer
[ https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Yi Liu updated HDFS-7348: - Attachment: HDFS-7348.001.patch Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer -- Key: HDFS-7348 URL: https://issues.apache.org/jira/browse/HDFS-7348 Project: Hadoop HDFS Issue Type: Sub-task Components: datanode Reporter: Kai Zheng Assignee: Yi Liu Attachments: ECWorker.java, HDFS-7348.001.patch This assumes the facilities like block reader and writer are ready, implements and performs erasure decoding/recovery work in *stripping* case utilizing erasure codec and coder provided by the codec framework. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HDFS-7348) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer
[ https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kai Zheng updated HDFS-7348: Parent Issue: HDFS-7285 (was: HDFS-8031) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer -- Key: HDFS-7348 URL: https://issues.apache.org/jira/browse/HDFS-7348 Project: Hadoop HDFS Issue Type: Sub-task Components: datanode Reporter: Kai Zheng Assignee: Yi Liu Attachments: ECWorker.java This assumes the facilities like block reader and writer are ready, implements and performs erasure decoding/recovery work in *stripping* case utilizing erasure codec and coder provided by the codec framework. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HDFS-7348) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer
[ https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kai Zheng updated HDFS-7348: Assignee: Yi Liu (was: Li Bo) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer -- Key: HDFS-7348 URL: https://issues.apache.org/jira/browse/HDFS-7348 Project: Hadoop HDFS Issue Type: Sub-task Components: datanode Reporter: Kai Zheng Assignee: Yi Liu This assumes the facilities like block reader and writer are ready, implements and performs erasure decoding/recovery work in *stripping* case utilizing erasure codec and coder provided by the codec framework. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HDFS-7348) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer
[
https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhe Zhang updated HDFS-7348:
Attachment: ECWorker.java
This is a very rough prototype I wrote *long time ago*. On {{DataNode}}, upon
receiving a codec command, it starts the {{ECWorker}} like this:
{code}
private void encodeBlock(ExtendedBlock block, BlockGroup bg) throws
IOException {
LinkedListExtendedBlock blocks = new LinkedListExtendedBlock();
LinkedListDatanodeInfo sources = new LinkedListDatanodeInfo();
for (LocatedBlock lb : bg.getLocatedBlocks()) {
blocks.add(new ExtendedBlock(block.getBlockPoolId(),
lb.getBlock().getLocalBlock()));
sources.add(lb.getLocations()[0]);
}
LOG.debug(encodeBlock + block);
ECWorker ecWorker = new ECWorker(block.getLocalBlock(),
blocks.toArray(new ExtendedBlock[blocks.size()]),
sources.toArray(new DatanodeInfo[sources.size()]), this);
ecWorkerMap.put(block.getLocalBlock(), ecWorker);
new Daemon(ecWorker).start();
}
{code}
Just wanted to share it here in case it's of any help.
Basically, it mimics the existing {{DataTransfer}} in {{DataNode}} but pulls
data instead of pushing.
I'm not sure if we should follow this direction or create a block reader /
writer for this purpose. Let's brainstorm here first.
Erasure Coding: perform stripping erasure decoding/recovery work given block
reader and writer
--
Key: HDFS-7348
URL: https://issues.apache.org/jira/browse/HDFS-7348
Project: Hadoop HDFS
Issue Type: Sub-task
Components: datanode
Reporter: Kai Zheng
Assignee: Yi Liu
Attachments: ECWorker.java
This assumes the facilities like block reader and writer are ready,
implements and performs erasure decoding/recovery work in *stripping* case
utilizing erasure codec and coder provided by the codec framework.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
[jira] [Updated] (HDFS-7348) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer
[ https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kai Zheng updated HDFS-7348: Summary: Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer (was: Erasure Coding: perform stripping erasure decoding work given block reader and writer) Erasure Coding: perform stripping erasure decoding/recovery work given block reader and writer -- Key: HDFS-7348 URL: https://issues.apache.org/jira/browse/HDFS-7348 Project: Hadoop HDFS Issue Type: Sub-task Components: datanode Reporter: Kai Zheng Assignee: Li Bo This assumes the facilities like block reader and writer are ready, implements and performs erasure decoding/recovery work in *stripping* case utilizing erasure codec and coder provided by the codec framework. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
