[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Arpit Agarwal updated HDFS-9038:
Resolution: Fixed
Fix Version/s: 2.7.4
Status: Resolved (was: Patch Available)
Pushed to branch-2.7.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Fix For: 2.8.0, 2.7.4, 3.0.0-alpha2
>
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038-branch-2.7.patch,
> HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Status: Patch Available (was: Reopened)
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038-branch-2.7.patch,
> HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-branch-2.7.patch
Uploading the branch-2.7 patch..And thanks for Arpit,Vinay and Chris for
helping closure of this issue .Please review branch-2.7 patch.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038-branch-2.7.patch,
> HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrew Wang updated HDFS-9038:
--
Fix Version/s: 3.0.0-alpha2
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Arpit Agarwal updated HDFS-9038:
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 2.8.0
Target Version/s: (was: 2.7.4)
Status: Resolved (was: Patch Available)
Pushed to 2.8.0. Hit numerous conflicts cherry-picking to branch-2.7 that I
didn't look into. 2.7.4 will likely need an updated patch.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Fix For: 2.8.0
>
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-011.patch
Attaching the updated patch with new test.
bq. Nitpick - convert(DatanodeInfoProto di) can use the new DataNodeInfo
constructor
This constructor was used intentionally as new constrictor was expecting all
fields to be specified, instead of just DataNodeId
Please review.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038-011.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: (was: MAPREDUCE-6682.04.patch)
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: MAPREDUCE-6682.04.patch
Uploaded the patch to fix the checkstyle issue and testcases fix. As ext
filesystems will reserve 5% space which is not considered in non-dfs,hence
{{TestNamenodeCapacityReport}} and {{TestNameNodeMetrics}} are failing..
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-010.patch
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch,
> HDFS-9038-010.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vinod Kumar Vavilapalli updated HDFS-9038:
--
Target Version/s: 2.7.4 (was: 2.7.3)
2.7.3 is under release process, changing target-version to 2.7.4.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
--
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-009.patch
Uploaded the patch to fix checkstyle issues..Testcases are passing
locally..Seems to be there is a difference in jenkins and local run...
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038-009.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-008.patch
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038-008.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Arpit Agarwal updated HDFS-9038:
Attachment: GetFree.java
tl; dr - We need agreement on the definition of non-DFS used.
IMO the original Jira description is inaccurate. The pre HDFS-5215 calculation
had two bugs.
# It incorrectly subtracted reserved space from the non-DFS used. (net
negative). Chris suggests this is not really an issue as non-DFS used should be
shown as zero unless it exceeds the DFS reserved value.
# It used File#getUsableSpace to calculate the volume free space instead of
File#getFreeSpace. (net positive)
The net effect was that non-DFS used was displayed as zero unless the actual
non-DFS used exceeded {{DFS reserved - system reserved}}.
HDFS-5215 fixed the first issue and the value that is now erroneously counted
towards non-DFS used is in fact the system reserved 5%.
Also attached a trivial utility that dumps the free/available space.
>From a mostly empty 40GB Ext4 partition:
{code}
$ java GetFree /mnt/sdb/hadoop/
Free space : 42,090,229,760
Available space : 39,925,968,896
{code}
Same partition reformatted as XFS:
{code}
Free space : 42,894,983,168
Available space : 42,894,983,168
{code}
So Ext derivatives hold back 5% free space while XFS does not.
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: GetFree.java, HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
--
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-007.patch
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch,
> HDFS-9038-007.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Arpit Agarwal updated HDFS-9038:
Summary: DFS reserved space is erroneously counted towards non-DFS used.
(was: Reserved space is erroneously counted towards non-DFS used.)
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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[jira] [Updated] (HDFS-9038) DFS reserved space is erroneously counted towards non-DFS used.
[
https://issues.apache.org/jira/browse/HDFS-9038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula updated HDFS-9038:
---
Attachment: HDFS-9038-006.patch
> DFS reserved space is erroneously counted towards non-DFS used.
> ---
>
> Key: HDFS-9038
> URL: https://issues.apache.org/jira/browse/HDFS-9038
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Chris Nauroth
>Assignee: Brahma Reddy Battula
> Attachments: HDFS-9038-002.patch, HDFS-9038-003.patch,
> HDFS-9038-004.patch, HDFS-9038-005.patch, HDFS-9038-006.patch, HDFS-9038.patch
>
>
> HDFS-5215 changed the DataNode volume available space calculation to consider
> the reserved space held by the {{dfs.datanode.du.reserved}} configuration
> property. As a side effect, reserved space is now counted towards non-DFS
> used. I don't believe it was intentional to change the definition of non-DFS
> used. This issue proposes restoring the prior behavior: do not count
> reserved space towards non-DFS used.
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