[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kai Zheng updated HDFS-9833:
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 3.0.0-alpha1
Status: Resolved (was: Patch Available)
Committed to trunk. Thanks [~rakeshr] for the great contribution!
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Fix For: 3.0.0-alpha1
>
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch,
> HDFS-9833-05.patch, HDFS-9833-06.patch, HDFS-9833-07.patch, HDFS-9833-08.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-08.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch,
> HDFS-9833-05.patch, HDFS-9833-06.patch, HDFS-9833-07.patch, HDFS-9833-08.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-07.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch,
> HDFS-9833-05.patch, HDFS-9833-06.patch, HDFS-9833-07.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-06.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch,
> HDFS-9833-05.patch, HDFS-9833-06.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-05.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch, HDFS-9833-05.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-05.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch, HDFS-9833-05.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: (was: HDFS-9833-05.patch)
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-04.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch, HDFS-9833-04.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-03.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: (was: HDFS-9833-03.patch)
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-03.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch, HDFS-9833-03.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-02.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch,
> HDFS-9833-02.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Target Version/s: 3.0.0-alpha1
Status: Patch Available (was: Open)
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-01.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rakesh R updated HDFS-9833:
---
Attachment: HDFS-9833-00-draft.patch
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-9833-00-draft.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kai Zheng updated HDFS-9833:
Assignee: Rakesh R (was: Kai Zheng)
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Rakesh R
> Labels: hdfs-ec-3.0-must-do
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kai Zheng updated HDFS-9833:
Labels: hdfs-ec-3.0-must-do (was: )
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Kai Zheng
> Labels: hdfs-ec-3.0-must-do
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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[jira] [Updated] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
[
https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kai Zheng updated HDFS-9833:
Summary: Erasure coding: recomputing block checksum on the fly by
reconstructing the missed/corrupt block data (was: Erasure coding: recomputing
block checksum on the fly by reconstructing missed/corrupt block)
> Erasure coding: recomputing block checksum on the fly by reconstructing the
> missed/corrupt block data
> -
>
> Key: HDFS-9833
> URL: https://issues.apache.org/jira/browse/HDFS-9833
> Project: Hadoop HDFS
> Issue Type: Sub-task
>Reporter: Kai Zheng
>Assignee: Kai Zheng
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum
> even some of striped blocks are missed, we need to consider recomputing block
> checksum on the fly for the missed/corrupt blocks. To recompute the block
> checksum, the block data needs to be reconstructed by erasure decoding, and
> the main needed codes for the block reconstruction could be borrowed from
> HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC
> worker, reconstructed blocks need to be written out to target datanodes, but
> here in this case, the remote writing isn't necessary, as the reconstructed
> block data is only used to recompute the checksum.
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