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https://issues.apache.org/jira/browse/HDFS-16269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16269:
---
Assignee: JiangHua Zhu
> [Fix] Improve NNThroughputBenchmark#blockReport operation
>
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https://issues.apache.org/jira/browse/HDFS-16269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16269:
Affects Version/s: 2.9.2
> [Fix] Improve NNThroughputBenchmark#blockReport operation
>
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https://issues.apache.org/jira/browse/HDFS-16269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16269:
Component/s: namenode
> [Fix] Improve NNThroughputBenchmark#blockReport operation
>
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https://issues.apache.org/jira/browse/HDFS-16269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16269:
Description:
When using NNThroughputBenchmark to verify the blockReport, you will get some
JiangHua Zhu created HDFS-16269:
---
Summary: [Fix] Improve NNThroughputBenchmark#blockReport operation
Key: HDFS-16269
URL: https://issues.apache.org/jira/browse/HDFS-16269
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16264 started by JiangHua Zhu.
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> When adding block keys, the records come from the specific Block Pool
>
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https://issues.apache.org/jira/browse/HDFS-16264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16264:
Component/s: datanode
> When adding block keys, the records come from the specific Block Pool
>
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https://issues.apache.org/jira/browse/HDFS-16264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16264:
---
Assignee: JiangHua Zhu
> When adding block keys, the records come from the specific Block
JiangHua Zhu created HDFS-16264:
---
Summary: When adding block keys, the records come from the
specific Block Pool
Key: HDFS-16264
URL: https://issues.apache.org/jira/browse/HDFS-16264
Project: Hadoop
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https://issues.apache.org/jira/browse/HDFS-16181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17423661#comment-17423661
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JiangHua Zhu commented on HDFS-16181:
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I noticed that this PR
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https://issues.apache.org/jira/browse/HDFS-16245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17423643#comment-17423643
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JiangHua Zhu commented on HDFS-16245:
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In jenkins, there are some exceptions, such as:
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JiangHua Zhu edited comment on HDFS-16245 at 10/2/21, 11:55 AM:
Here are
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JiangHua Zhu commented on HDFS-16245:
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Here are some examples when loading the FSImage file is
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https://issues.apache.org/jira/browse/HDFS-16245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16245 started by JiangHua Zhu.
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> Record the number of INodeDirectory when loading the FSImage file
>
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JiangHua Zhu updated HDFS-16245:
Summary: Record the number of INodeDirectory when loading the FSImage file
(was: Record number of
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https://issues.apache.org/jira/browse/HDFS-16245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16245:
Summary: Record number of loaded INodeDirectory when starting NameNode
service (was: Print the
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https://issues.apache.org/jira/browse/HDFS-16245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16245:
Component/s: namenode
> Print the number of loaded INodeDirectory when starting the NameNode
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JiangHua Zhu reassigned HDFS-16245:
---
Assignee: JiangHua Zhu
> Print the number of loaded INodeDirectory when starting the
JiangHua Zhu created HDFS-16245:
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Summary: Print the number of loaded INodeDirectory when starting
the NameNode service
Key: HDFS-16245
URL: https://issues.apache.org/jira/browse/HDFS-16245
Project:
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https://issues.apache.org/jira/browse/HDFS-16244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16244 started by JiangHua Zhu.
---
> Add the necessary write lock in Checkpointer#doCheckpoint()
>
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https://issues.apache.org/jira/browse/HDFS-16244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16244:
Description:
When BackupNode is enabled, Checkpointer#doCheckpoint() will start to work.
When the
JiangHua Zhu created HDFS-16244:
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Summary: Add the necessary write lock in
Checkpointer#doCheckpoint()
Key: HDFS-16244
URL: https://issues.apache.org/jira/browse/HDFS-16244
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16244:
Component/s: namenode
> Add the necessary write lock in Checkpointer#doCheckpoint()
>
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https://issues.apache.org/jira/browse/HDFS-16244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16244:
---
Assignee: JiangHua Zhu
> Add the necessary write lock in Checkpointer#doCheckpoint()
>
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https://issues.apache.org/jira/browse/HDFS-16238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16238 started by JiangHua Zhu.
---
> Improve comments related to EncryptionZoneManager
>
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https://issues.apache.org/jira/browse/HDFS-16238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16238:
Component/s: namenode
encryption
documentation
> Improve
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https://issues.apache.org/jira/browse/HDFS-16238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16238:
---
Assignee: JiangHua Zhu
> Improve comments related to EncryptionZoneManager
>
JiangHua Zhu created HDFS-16238:
---
Summary: Improve comments related to EncryptionZoneManager
Key: HDFS-16238
URL: https://issues.apache.org/jira/browse/HDFS-16238
Project: Hadoop HDFS
Issue
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https://issues.apache.org/jira/browse/HDFS-16237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16237 started by JiangHua Zhu.
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> Record the BPServiceActor information that communicates with Standby
>
JiangHua Zhu created HDFS-16237:
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Summary: Record the BPServiceActor information that communicates
with Standby
Key: HDFS-16237
URL: https://issues.apache.org/jira/browse/HDFS-16237
Project: Hadoop
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https://issues.apache.org/jira/browse/HDFS-16237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16237:
---
Assignee: JiangHua Zhu
> Record the BPServiceActor information that communicates with
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https://issues.apache.org/jira/browse/HDFS-16000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17419086#comment-17419086
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JiangHua Zhu commented on HDFS-16000:
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Hello [~zhuxiangyi], I am also paying attention to this
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https://issues.apache.org/jira/browse/HDFS-16234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16234 started by JiangHua Zhu.
---
> Improve DataNodeMetrics to initialize IBR more reasonable
>
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https://issues.apache.org/jira/browse/HDFS-16234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16234:
---
Assignee: JiangHua Zhu
> Improve DataNodeMetrics to initialize IBR more reasonable
>
JiangHua Zhu created HDFS-16234:
---
Summary: Improve DataNodeMetrics to initialize IBR more reasonable
Key: HDFS-16234
URL: https://issues.apache.org/jira/browse/HDFS-16234
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17418921#comment-17418921
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JiangHua Zhu commented on HDFS-16043:
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I am also paying attention to this improvement.
> HDFS :
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https://issues.apache.org/jira/browse/HDFS-16229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16229:
Component/s: documentation
> Remove the use of obsolete BLOCK_DELETION_INCREMENT
>
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https://issues.apache.org/jira/browse/HDFS-16229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16229:
Component/s: namenode
> Remove the use of obsolete BLOCK_DELETION_INCREMENT
>
JiangHua Zhu created HDFS-16229:
---
Summary: Remove the use of obsolete BLOCK_DELETION_INCREMENT
Key: HDFS-16229
URL: https://issues.apache.org/jira/browse/HDFS-16229
Project: Hadoop HDFS
Issue
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https://issues.apache.org/jira/browse/HDFS-16229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16229:
---
Assignee: JiangHua Zhu
> Remove the use of obsolete BLOCK_DELETION_INCREMENT
>
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https://issues.apache.org/jira/browse/HDFS-16228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17416458#comment-17416458
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JiangHua Zhu commented on HDFS-16228:
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[~prasad-acit], Can you help review it?
Thank you very much.
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17415859#comment-17415859
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JiangHua Zhu commented on HDFS-16220:
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Here are some phenomena in the debugging process.
When
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16220:
Attachment: debug2.jpg
> [FGL]Configurable INodeMap#NAMESPACE_KEY_DEPTH_RANGES_STATIC
>
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16220:
Attachment: debug1.jpg
> [FGL]Configurable INodeMap#NAMESPACE_KEY_DEPTH_RANGES_STATIC
>
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https://issues.apache.org/jira/browse/HDFS-16228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16228:
Summary: [FGL]Improve safer PartitionedGSet#size (was: Improve safer
PartitionedGSet#size)
>
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https://issues.apache.org/jira/browse/HDFS-16228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16228:
Target Version/s: Fine-Grained Locking
> Improve safer PartitionedGSet#size
>
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https://issues.apache.org/jira/browse/HDFS-16228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16228:
Component/s: namenode
hdfs
> Improve safer PartitionedGSet#size
>
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https://issues.apache.org/jira/browse/HDFS-16228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16228 started by JiangHua Zhu.
---
> Improve safer PartitionedGSet#size
> --
>
>
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JiangHua Zhu reassigned HDFS-16228:
---
Assignee: JiangHua Zhu
> Improve safer PartitionedGSet#size
>
JiangHua Zhu created HDFS-16228:
---
Summary: Improve safer PartitionedGSet#size
Key: HDFS-16228
URL: https://issues.apache.org/jira/browse/HDFS-16228
Project: Hadoop HDFS
Issue Type: Sub-task
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https://issues.apache.org/jira/browse/HDFS-15516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17414685#comment-17414685
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JiangHua Zhu commented on HDFS-15516:
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Thanks [~ayushtkn] for the comment.
Sorry for being late, I
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https://issues.apache.org/jira/browse/HDFS-16069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu resolved HDFS-16069.
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Resolution: Duplicate
> Remove locally stored files (edit log) when NameNode becomes Standby
>
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https://issues.apache.org/jira/browse/HDFS-16069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17414055#comment-17414055
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JiangHua Zhu commented on HDFS-16069:
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Thanks [~ayushtkn] for the comment.
I will associate with
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JiangHua Zhu edited comment on HDFS-16069 at 9/13/21, 9:02 AM:
---
Thanks
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17413853#comment-17413853
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JiangHua Zhu commented on HDFS-16220:
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Thanks [~prasad-acit] for the comment.
> [FGL]Configurable
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JiangHua Zhu commented on HDFS-16220:
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[~prasad-acit] [~shv], I hope to have some communication with
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16220 started by JiangHua Zhu.
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> [FGL]Configurable INodeMap#NAMESPACE_KEY_DEPTH_RANGES_STATIC
>
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https://issues.apache.org/jira/browse/HDFS-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16220:
Parent: HDFS-14703
Issue Type: Sub-task (was: Improvement)
> [FGL]Configurable
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JiangHua Zhu reassigned HDFS-16220:
---
Assignee: JiangHua Zhu
> [FGL]Configurable INodeMap#NAMESPACE_KEY_DEPTH_RANGES_STATIC
>
JiangHua Zhu created HDFS-16220:
---
Summary: [FGL]Configurable
INodeMap#NAMESPACE_KEY_DEPTH_RANGES_STATIC
Key: HDFS-16220
URL: https://issues.apache.org/jira/browse/HDFS-16220
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-14703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17413096#comment-17413096
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JiangHua Zhu commented on HDFS-14703:
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Okay, I will continue to work.
> NameNode Fine-Grained
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JiangHua Zhu commented on HDFS-14703:
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Thanks [~prasad-acit] for sharing.
Yes, I have browsed through
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JiangHua Zhu commented on HDFS-14703:
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[~prasad-acit], I have some very curious questions.
The first
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https://issues.apache.org/jira/browse/HDFS-16211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17412306#comment-17412306
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JiangHua Zhu commented on HDFS-16211:
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Thank [~shv] for the comments.
When I saw that I didn't
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JiangHua Zhu commented on HDFS-14703:
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Okay, I get it. Thanks [~prasad-acit] for the comment.
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https://issues.apache.org/jira/browse/HDFS-16208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17410869#comment-17410869
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JiangHua Zhu commented on HDFS-16208:
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It looks good.
Thanks [~prasad-acit] for the comment.
>
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JiangHua Zhu commented on HDFS-14703:
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I noticed that the file PartitionedGSet.java has some
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https://issues.apache.org/jira/browse/HDFS-16208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17410558#comment-17410558
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JiangHua Zhu commented on HDFS-16208:
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I want to take the liberty to ask, are there any test reports
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https://issues.apache.org/jira/browse/HDFS-16211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16211 started by JiangHua Zhu.
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> Complete some descriptions related to AuthToken
>
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JiangHua Zhu reassigned HDFS-16211:
---
Assignee: JiangHua Zhu
> Complete some descriptions related to AuthToken
>
JiangHua Zhu created HDFS-16211:
---
Summary: Complete some descriptions related to AuthToken
Key: HDFS-16211
URL: https://issues.apache.org/jira/browse/HDFS-16211
Project: Hadoop HDFS
Issue
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https://issues.apache.org/jira/browse/HDFS-16211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16211:
Component/s: documentation
> Complete some descriptions related to AuthToken
>
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https://issues.apache.org/jira/browse/HDFS-16204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16204 started by JiangHua Zhu.
---
> Improve FSDirEncryptionZoneOp related parameter comments
>
JiangHua Zhu created HDFS-16204:
---
Summary: Improve FSDirEncryptionZoneOp related parameter comments
Key: HDFS-16204
URL: https://issues.apache.org/jira/browse/HDFS-16204
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16204:
---
Assignee: JiangHua Zhu
> Improve FSDirEncryptionZoneOp related parameter comments
>
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https://issues.apache.org/jira/browse/HDFS-16197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16197:
Priority: Major (was: Minor)
> Simplify getting NNStorage in FSNamesystem
>
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https://issues.apache.org/jira/browse/HDFS-16197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17407209#comment-17407209
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JiangHua Zhu commented on HDFS-16197:
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Add a method to obtain NNStorage more concisely, for example:
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https://issues.apache.org/jira/browse/HDFS-16197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16197 started by JiangHua Zhu.
---
> Simplify getting NNStorage in FSNamesystem
>
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https://issues.apache.org/jira/browse/HDFS-16197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16197:
Component/s: namenode
> Simplify getting NNStorage in FSNamesystem
>
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https://issues.apache.org/jira/browse/HDFS-16197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16197:
---
Assignee: JiangHua Zhu
> Simplify getting NNStorage in FSNamesystem
>
JiangHua Zhu created HDFS-16197:
---
Summary: Simplify getting NNStorage in FSNamesystem
Key: HDFS-16197
URL: https://issues.apache.org/jira/browse/HDFS-16197
Project: Hadoop HDFS
Issue Type:
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https://issues.apache.org/jira/browse/HDFS-15939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-15939:
Component/s: datanode
> Solve the problem that DataXceiverServer#run() does not record
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https://issues.apache.org/jira/browse/HDFS-16173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16173:
Component/s: (was: hdfs)
fs
> Improve CopyCommands#Put#executor queue
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https://issues.apache.org/jira/browse/HDFS-16175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16175:
Attachment: (was: HDFS-16175.000.patch)
> Improve the configurable value of Server
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https://issues.apache.org/jira/browse/HDFS-16134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu resolved HDFS-16134.
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Resolution: Duplicate
> Optimize RPC throughput
> ---
>
>
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JiangHua Zhu commented on HDFS-16175:
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It has been verified in the cluster and is running well.
>
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https://issues.apache.org/jira/browse/HDFS-16175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16175 started by JiangHua Zhu.
---
> Improve the configurable value of Server #PURGE_INTERVAL_NANOS
>
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https://issues.apache.org/jira/browse/HDFS-16175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16175:
Attachment: HDFS-16175.000.patch
> Improve the configurable value of Server #PURGE_INTERVAL_NANOS
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https://issues.apache.org/jira/browse/HDFS-16175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16175:
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Assignee: JiangHua Zhu
> Improve the configurable value of Server #PURGE_INTERVAL_NANOS
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https://issues.apache.org/jira/browse/HDFS-16175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16175:
Description:
In Server, Server #PURGE_INTERVAL_NANOS is a fixed value, 15.
We can try to improve
JiangHua Zhu created HDFS-16175:
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Summary: Improve the configurable value of Server
#PURGE_INTERVAL_NANOS
Key: HDFS-16175
URL: https://issues.apache.org/jira/browse/HDFS-16175
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17399438#comment-17399438
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JiangHua Zhu commented on HDFS-16062:
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We have a 2000 node cluster, using this patch, it runs very
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https://issues.apache.org/jira/browse/HDFS-16173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17398619#comment-17398619
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JiangHua Zhu commented on HDFS-16173:
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It has been verified on our online cluster and it runs very
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https://issues.apache.org/jira/browse/HDFS-16173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16173 started by JiangHua Zhu.
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> Improve CopyCommands#Put#executor queue configurability
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https://issues.apache.org/jira/browse/HDFS-16173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16173:
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Assignee: JiangHua Zhu
> Improve CopyCommands#Put#executor queue configurability
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JiangHua Zhu created HDFS-16173:
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Summary: Improve CopyCommands#Put#executor queue configurability
Key: HDFS-16173
URL: https://issues.apache.org/jira/browse/HDFS-16173
Project: Hadoop HDFS
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https://issues.apache.org/jira/browse/HDFS-16162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu updated HDFS-16162:
Component/s: documentation
> Improve DFSUtil#checkProtectedDescendants() related parameter
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https://issues.apache.org/jira/browse/HDFS-16162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17397283#comment-17397283
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JiangHua Zhu commented on HDFS-16162:
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A comment on fsd is added here, which is helpful for
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https://issues.apache.org/jira/browse/HDFS-16162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-16162 started by JiangHua Zhu.
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> Improve DFSUtil#checkProtectedDescendants() related parameter comments
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https://issues.apache.org/jira/browse/HDFS-16162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu reassigned HDFS-16162:
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Assignee: JiangHua Zhu
> Improve DFSUtil#checkProtectedDescendants() related parameter
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