[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yi Liu updated HDFS-8900:
-
Resolution: Fixed
Hadoop Flags: Incompatible change,Reviewed (was: Incompatible change)
Fix Version/s: 2.8.0
Status: Resolved (was: Patch Available)
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Fix For: 2.8.0
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch,
HDFS-8900.003.patch, HDFS-8900.004.patch, HDFS-8900.005.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
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[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yi Liu updated HDFS-8900:
-
Attachment: HDFS-8900.004.patch
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch,
HDFS-8900.003.patch, HDFS-8900.004.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
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[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yi Liu updated HDFS-8900:
-
Attachment: HDFS-8900.005.patch
Update patch to fix the checkstyle and add more comment in XAttrFeature.
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch,
HDFS-8900.003.patch, HDFS-8900.004.patch, HDFS-8900.005.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
--
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[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yi Liu updated HDFS-8900:
-
Attachment: HDFS-8900.003.patch
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch,
HDFS-8900.003.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
--
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[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yi Liu updated HDFS-8900:
-
Summary: Compact XAttrs to optimize memory footprint. (was: Optimize XAttr
memory footprint.)
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
--
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[jira] [Updated] (HDFS-8900) Compact XAttrs to optimize memory footprint.
[
https://issues.apache.org/jira/browse/HDFS-8900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrew Wang updated HDFS-8900:
--
Hadoop Flags: Incompatible change
Release Note: The config key dfs.namenode.fs-limits.max-xattr-size can no
longer be set to a value of 0 (previously used to indicate unlimited) or a
value greater than 32KB. This is a constraint on xattr size similar to many
local filesystems.
Compact XAttrs to optimize memory footprint.
Key: HDFS-8900
URL: https://issues.apache.org/jira/browse/HDFS-8900
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yi Liu
Assignee: Yi Liu
Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch
{code}
private final ImmutableListXAttr xAttrs;
{code}
Currently we use above in XAttrFeature, it's not efficient from memory point
of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead,
and each object has memory alignment.
We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}.
--
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