[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[
https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhe Zhang updated HDFS-8873:
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 2.7.4
2.9.0
Status: Resolved (was: Patch Available)
Thanks Erik. The branch-2.7 patch LGTM. Reported UT failures are unrelated and
cannot be reproduced locally. {{testThrottling}} failure on OSX is being
addressed under HDFS-11707.
I just committed the patch to branch-2.7.
> Allow the directoryScanner to be rate-limited
> -
>
> Key: HDFS-8873
> URL: https://issues.apache.org/jira/browse/HDFS-8873
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Nathan Roberts
>Assignee: Daniel Templeton
> Labels: 2.7.2-candidate
> Fix For: 2.8.0, 2.9.0, 2.7.4, 3.0.0-alpha1
>
> Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch,
> HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch,
> HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch,
> HDFS-8873.009.patch, HDFS-8873-branch-2.7.009.patch
>
>
> The new 2-level directory layout can make directory scans expensive in terms
> of disk seeks (see HDFS-8791) for details.
> It would be good if the directoryScanner() had a configurable duty cycle that
> would reduce its impact on disk performance (much like the approach in
> HDFS-8617).
> Without such a throttle, disks can go 100% busy for many minutes at a time
> (assuming the common case of all inodes in cache but no directory blocks
> cached, 64K seeks are required for full directory listing which translates to
> 655 seconds)
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[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[ https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Zhe Zhang updated HDFS-8873: Status: Patch Available (was: Reopened) Sorry for reopening the JIRA, triggering Jenkins for the branch-2.7 patch from [~xkrogen]. > Allow the directoryScanner to be rate-limited > - > > Key: HDFS-8873 > URL: https://issues.apache.org/jira/browse/HDFS-8873 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode >Affects Versions: 2.7.1 >Reporter: Nathan Roberts >Assignee: Daniel Templeton > Labels: 2.7.2-candidate > Fix For: 2.8.0, 3.0.0-alpha1 > > Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch, > HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch, > HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch, > HDFS-8873.009.patch, HDFS-8873-branch-2.7.009.patch > > > The new 2-level directory layout can make directory scans expensive in terms > of disk seeks (see HDFS-8791) for details. > It would be good if the directoryScanner() had a configurable duty cycle that > would reduce its impact on disk performance (much like the approach in > HDFS-8617). > Without such a throttle, disks can go 100% busy for many minutes at a time > (assuming the common case of all inodes in cache but no directory blocks > cached, 64K seeks are required for full directory listing which translates to > 655 seconds) -- This message was sent by Atlassian JIRA (v6.3.15#6346) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[
https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Erik Krogen updated HDFS-8873:
--
Attachment: HDFS-8873-branch-2.7.009.patch
I've noticed the new {{TestDirectoryScanner#testThrottling}} fails consistently
on OS X... I filed HDFS-11707 to track.
Also attaching a patch for a 2.7 backport; it does not contain the findbugs
issue fixed in HDFS-9174.
> Allow the directoryScanner to be rate-limited
> -
>
> Key: HDFS-8873
> URL: https://issues.apache.org/jira/browse/HDFS-8873
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
>Affects Versions: 2.7.1
>Reporter: Nathan Roberts
>Assignee: Daniel Templeton
> Labels: 2.7.2-candidate
> Fix For: 2.8.0, 3.0.0-alpha1
>
> Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch,
> HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch,
> HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch,
> HDFS-8873.009.patch, HDFS-8873-branch-2.7.009.patch
>
>
> The new 2-level directory layout can make directory scans expensive in terms
> of disk seeks (see HDFS-8791) for details.
> It would be good if the directoryScanner() had a configurable duty cycle that
> would reduce its impact on disk performance (much like the approach in
> HDFS-8617).
> Without such a throttle, disks can go 100% busy for many minutes at a time
> (assuming the common case of all inodes in cache but no directory blocks
> cached, 64K seeks are required for full directory listing which translates to
> 655 seconds)
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[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[ https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kihwal Lee updated HDFS-8873: - Labels: 2.7.2-candidate (was: ) > Allow the directoryScanner to be rate-limited > - > > Key: HDFS-8873 > URL: https://issues.apache.org/jira/browse/HDFS-8873 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode >Affects Versions: 2.7.1 >Reporter: Nathan Roberts >Assignee: Daniel Templeton > Labels: 2.7.2-candidate > Fix For: 2.8.0 > > Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch, > HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch, > HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch, > HDFS-8873.009.patch > > > The new 2-level directory layout can make directory scans expensive in terms > of disk seeks (see HDFS-8791) for details. > It would be good if the directoryScanner() had a configurable duty cycle that > would reduce its impact on disk performance (much like the approach in > HDFS-8617). > Without such a throttle, disks can go 100% busy for many minutes at a time > (assuming the common case of all inodes in cache but no directory blocks > cached, 64K seeks are required for full directory listing which translates to > 655 seconds) -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[ https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Colin Patrick McCabe updated HDFS-8873: --- Resolution: Fixed Fix Version/s: 2.8.0 Status: Resolved (was: Patch Available) > Allow the directoryScanner to be rate-limited > - > > Key: HDFS-8873 > URL: https://issues.apache.org/jira/browse/HDFS-8873 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode >Affects Versions: 2.7.1 >Reporter: Nathan Roberts >Assignee: Daniel Templeton > Fix For: 2.8.0 > > Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch, > HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch, > HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch, > HDFS-8873.009.patch > > > The new 2-level directory layout can make directory scans expensive in terms > of disk seeks (see HDFS-8791) for details. > It would be good if the directoryScanner() had a configurable duty cycle that > would reduce its impact on disk performance (much like the approach in > HDFS-8617). > Without such a throttle, disks can go 100% busy for many minutes at a time > (assuming the common case of all inodes in cache but no directory blocks > cached, 64K seeks are required for full directory listing which translates to > 655 seconds) -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HDFS-8873) Allow the directoryScanner to be rate-limited
[ https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Colin Patrick McCabe updated HDFS-8873: --- Summary: Allow the directoryScanner to be rate-limited (was: throttle directoryScanner) > Allow the directoryScanner to be rate-limited > - > > Key: HDFS-8873 > URL: https://issues.apache.org/jira/browse/HDFS-8873 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode >Affects Versions: 2.7.1 >Reporter: Nathan Roberts >Assignee: Daniel Templeton > Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch, > HDFS-8873.003.patch, HDFS-8873.004.patch, HDFS-8873.005.patch, > HDFS-8873.006.patch, HDFS-8873.007.patch, HDFS-8873.008.patch, > HDFS-8873.009.patch > > > The new 2-level directory layout can make directory scans expensive in terms > of disk seeks (see HDFS-8791) for details. > It would be good if the directoryScanner() had a configurable duty cycle that > would reduce its impact on disk performance (much like the approach in > HDFS-8617). > Without such a throttle, disks can go 100% busy for many minutes at a time > (assuming the common case of all inodes in cache but no directory blocks > cached, 64K seeks are required for full directory listing which translates to > 655 seconds) -- This message was sent by Atlassian JIRA (v6.3.4#6332)
