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Kai Zheng commented on HDFS-6709:
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Hi Colin,
I learned the patch. The Slab stuffs look
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Kai Zheng commented on HDFS-6658:
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So would it be better to put the BlockList stuffs off
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Kai Zheng commented on HDFS-6709:
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bq. The {{ByteBuffer}} interface should be slower, since
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Kai Zheng commented on HDFS-6709:
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bq. Sadly, while investigating off heap performance
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Kai Zheng commented on HDFS-6709:
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I repeated the test in the post and sadly found it's
Kai Zheng created HDFS-5087:
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Summary: Allowing specific JAVA heap max setting for HDFS related
services
Key: HDFS-5087
URL: https://issues.apache.org/jira/browse/HDFS-5087
Project: Hadoop HDFS
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Kai Zheng updated HDFS-5087:
Attachment: HDFS-5087.patch
Modified hdfs script to check and respect any specific JAVA heap max setting
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Kai Zheng updated HDFS-5087:
Status: Patch Available (was: Open)
Allowing specific JAVA heap max setting for HDFS related services
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Kai Zheng commented on HDFS-5087:
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It only changed a script and was tested manually.
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Kai Zheng commented on HDFS-5087:
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In hdfs script, with the following line
{code}
exec
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Kai Zheng commented on HDFS-5087:
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bq.just process the command line parameters and strip
Kai Zheng created HDFS-5129:
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Summary: JournalNode should also respect
DFS_WEB_AUTHENTICATION_KERBEROS_KEYTAB_KEY as NN and SNN
Key: HDFS-5129
URL: https://issues.apache.org/jira/browse/HDFS-5129
Project:
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Kai Zheng resolved HDFS-5129.
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Resolution: Duplicate
Duplicate of HDFS-5091. Support for spnego keytab separate from the JournalNode
Kai Zheng created HDFS-5152:
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Summary: Avoiding redundant Kerberos login for Zookeeper client in
ActiveStandbyElector
Key: HDFS-5152
URL: https://issues.apache.org/jira/browse/HDFS-5152
Project: Hadoop
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Kai Zheng updated HDFS-5152:
Attachment: HDFS-5152.patch
Attached a patch. Pending to be submitted when required patches get in.
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Kai Zheng commented on HDFS-5152:
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bq.Is that correct?
Yes, exactly.
bq.Will this change
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Kai Zheng commented on HDFS-5152:
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In non-secure mode login is null and the behavior stays
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Kai Zheng commented on HDFS-5248:
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I guess there might be a place calling ugi.doAs or like
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Kai Zheng commented on HDFS-7285:
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Thanks Zhe for hosting the session.
bq.After soliciting
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Kai Zheng commented on HDFS-7285:
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Thanks everyone for having the branch. We're currently
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Kai Zheng commented on HDFS-7285:
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Hi [~apurtell], I think you have good points. As the
Kai Zheng created HDFS-7343:
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Summary: A comprehensive storage policy engine
Key: HDFS-7343
URL: https://issues.apache.org/jira/browse/HDFS-7343
Project: Hadoop HDFS
Issue Type: Improvement
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Kai Zheng updated HDFS-7343:
Summary: A comprehensive and flexible storage policy engine (was: A
comprehensive storage policy engine)
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Kai Zheng commented on HDFS-7343:
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Abstracted from [~Andrew.wang]'s [meeting
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Kai Zheng commented on HDFS-7343:
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For [~apurtell]'s
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Kai Zheng commented on HDFS-7285:
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Hi [~andrew.wang], to address the policy engine aspects
Kai Zheng created HDFS-7344:
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Summary: Erasure Coding worker and support in DataNode
Key: HDFS-7344
URL: https://issues.apache.org/jira/browse/HDFS-7344
Project: Hadoop HDFS
Issue Type: Sub-task
Kai Zheng created HDFS-7345:
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Summary: Local Reconstruction Codes (LRC)
Key: HDFS-7345
URL: https://issues.apache.org/jira/browse/HDFS-7345
Project: Hadoop HDFS
Issue Type: Sub-task
Affects
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Kai Zheng updated HDFS-7344:
Assignee: Li Bo (was: Kai Zheng)
Erasure Coding worker and support in DataNode
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Kai Zheng reassigned HDFS-7338:
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Assignee: Li Bo
Reed-Solomon codec library support
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Kai Zheng updated HDFS-7337:
Description:
According to HDFS-7285 and the design, this considers to support multiple
Erasure Codecs
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Kai Zheng commented on HDFS-7337:
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To better position this issue and avoid the possible
Kai Zheng created HDFS-7346:
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Summary: Process erasure encoding work
Key: HDFS-7346
URL: https://issues.apache.org/jira/browse/HDFS-7346
Project: Hadoop HDFS
Issue Type: Task
Components:
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Kai Zheng commented on HDFS-7337:
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Yes, agree. Please go ahead. Thanks.
Configurable and
Kai Zheng created HDFS-7348:
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Summary: Process erasure decoding work
Key: HDFS-7348
URL: https://issues.apache.org/jira/browse/HDFS-7348
Project: Hadoop HDFS
Issue Type: Task
Reporter:
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Kai Zheng reassigned HDFS-7338:
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Assignee: Kai Zheng (was: Li Bo)
Reed-Solomon codec library support
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Kai Zheng updated HDFS-7285:
Fix Version/s: HDFS-EC
Erasure Coding Support inside HDFS
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Kai Zheng created HDFS-7353:
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Summary: Common Erasure Codec API and plugin support
Key: HDFS-7353
URL: https://issues.apache.org/jira/browse/HDFS-7353
Project: Hadoop HDFS
Issue Type: Sub-task
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Kai Zheng reassigned HDFS-7353:
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Assignee: Kai Zheng
Common Erasure Codec API and plugin support
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Kai Zheng commented on HDFS-7338:
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This will follow the common codec API and plugin support
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Kai Zheng updated HDFS-7338:
Description: This is to provide RS codec implementation for encoding and
decoding.
Reed-Solomon codec
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Kai Zheng updated HDFS-7337:
Description:
According to HDFS-7285 and the design, this considers to support multiple
Erasure Codecs via
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Kai Zheng commented on HDFS-7337:
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Also opened HDFS-7353 to focus on the very low level
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Kai Zheng commented on HDFS-7337:
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Zhe, let me consider these issues together and think
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Kai Zheng reassigned HDFS-7337:
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Assignee: Kai Zheng
Configurable and pluggable Erasure Codec and schema
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Kai Zheng updated HDFS-7353:
Fix Version/s: HDFS-EC
Common Erasure Codec API and plugin support
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Kai Zheng updated HDFS-7337:
Attachment: HDFS-7337-prototype-v1.patch
Initial prototype patch for quick ideas.
Configurable and
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Kai Zheng commented on HDFS-7337:
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[~zhz], would you take a look at the quick prototype
Kai Zheng created HDFS-7371:
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Summary: Loading EC schemas from configuration
Key: HDFS-7371
URL: https://issues.apache.org/jira/browse/HDFS-7371
Project: Hadoop HDFS
Issue Type: Task
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Kai Zheng commented on HDFS-7371:
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Configuring multiple erasure codecs (*JerasureRS*,
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Kai Zheng commented on HDFS-7371:
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In the above defined schemas, the options/parameters
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Kai Zheng commented on HDFS-7337:
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The points made in the prototype patch are:
* Multiple
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Kai Zheng reassigned HDFS-7343:
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Assignee: Kai Zheng
A comprehensive and flexible storage policy engine
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Kai Zheng commented on HDFS-7343:
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Yes Andrew. I linked the mentioned issue and will take
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Kai Zheng commented on HDFS-7343:
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As far as I understand for now, the policy engine
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Kai Zheng updated HDFS-7343:
Target Version/s: (was: HDFS-EC)
A comprehensive and flexible storage policy engine
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Kai Zheng commented on HDFS-7363:
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The logic was intended to be covered in erasure codec by
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Kai Zheng resolved HDFS-7363.
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Resolution: Duplicate
Pluggable algorithms to form block groups in erasure coding
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Kai Zheng commented on HDFS-7345:
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From [Facebookâs advanced erasure
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Kai Zheng commented on HDFS-7345:
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Thanks [~andrew.wang] for the escalating.
Local
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Kai Zheng commented on HDFS-7345:
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Anyway how it goes for the IP issue, I would continue
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Kai Zheng updated HDFS-7337:
Attachment: PluggableErasureCodec.pdf
For time saving, I composed this doc to illustrate the erasure codec
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Kai Zheng reopened HDFS-7363:
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Assignee: Kai Zheng
Let me reuse this item as a sub task of HDFS-7337, where BlockGrouper is
defined
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Kai Zheng updated HDFS-7353:
Description: This is to abstract and define common coder API across
different codec algorithms like RS, XOR
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Kai Zheng updated HDFS-7353:
Summary: Common Erasure Coder API (was: Common Erasure Codec API and
plugin support)
Common Erasure Coder
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Kai Zheng updated HDFS-7345:
Description: HDFS-7285 proposes to support Erasure Coding inside HDFS,
supports multiple Erasure Coding
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Kai Zheng updated HDFS-7345:
Summary: Local Repairable Codes (LRC) (was: Local Reconstruction Codes
(LRC))
Local Repairable Codes
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Kai Zheng updated HDFS-7345:
Description: HDFS-7285 proposes to support Erasure Coding inside HDFS,
supports multiple Erasure Coding
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Kai Zheng commented on HDFS-7345:
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To possibly avoid the IP concern, I changed the title
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Kai Zheng updated HDFS-7345:
Attachment: LRC-compare.pdf
Added a simple slides to illustrate the differences among all the so-called LRC
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Kai Zheng updated HDFS-7371:
Issue Type: Sub-task (was: Task)
Parent: HDFS-7285
Loading EC schemas from configuration
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Kai Zheng updated HDFS-7346:
Issue Type: Sub-task (was: Task)
Parent: HDFS-7285
Process erasure encoding work
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Kai Zheng updated HDFS-7348:
Issue Type: Sub-task (was: Task)
Parent: HDFS-7285
Process erasure decoding work
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Kai Zheng updated HDFS-7338:
Summary: Reed-Solomon codes (was: Reed-Solomon codec library support)
Reed-Solomon codes
Kai Zheng created HDFS-7417:
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Summary: XOR codes
Key: HDFS-7417
URL: https://issues.apache.org/jira/browse/HDFS-7417
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Kai Zheng
Kai Zheng created HDFS-7418:
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Summary: RS coder in pure Java
Key: HDFS-7418
URL: https://issues.apache.org/jira/browse/HDFS-7418
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Kai
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Kai Zheng updated HDFS-7353:
Summary: Erasure Coder for concrete encoding and decoding (was: Common
Erasure Coder API)
Erasure Coder
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Kai Zheng updated HDFS-7353:
Description: This is to abstract and define erasure coder API across
different codes algorithms like RS, XOR
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Kai Zheng updated HDFS-7418:
Description: This will implement RS coder by porting existing codes in
HDFS-RAID in the new codec and coder
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Kai Zheng commented on HDFS-7349:
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Hi Vinay,
The patch looks great even in the initial
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Kai Zheng commented on HDFS-7349:
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Thanks Vinay for the detailed clarifying.
About
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Kai Zheng updated HDFS-7337:
Attachment: HDFS-7337-prototype-v3.zip
Updated the prototype codes:
1. Refined the APIs, ErasureCoder
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Kai Zheng commented on HDFS-6133:
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Hi Yunjiong,
The patch looks great. Minor comments:
1.
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Kai Zheng commented on HDFS-7337:
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We're discussing offline thru the design and codes. When
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Kai Zheng updated HDFS-7371:
Description: System administrator can configure multiple EC codecs in
hdfs-site.xml file, and codec
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Kai Zheng updated HDFS-7371:
Description: System administrator can configure multiple EC codecs in
hdfs-site.xml file, and codec
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https://issues.apache.org/jira/browse/HDFS-7349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14304733#comment-14304733
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Kai Zheng commented on HDFS-7349:
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bq.It's a design question whether we should ask users to
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https://issues.apache.org/jira/browse/HDFS-7371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated HDFS-7371:
Summary: Loading predefined EC schemas from configuration (was: Loading EC
schemas from configuration)
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https://issues.apache.org/jira/browse/HDFS-7731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14304746#comment-14304746
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Kai Zheng commented on HDFS-7731:
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bq.The key version is same as the version in the keytab
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Kai Zheng commented on HDFS-7371:
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[~zhz] has good idea to store schema parameters as
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Kai Zheng commented on HDFS-7349:
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OK no problem. I'm working on the way from low level
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Kai Zheng commented on HDFS-7371:
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Thanks Zhe. Will look at the design and think about it.
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https://issues.apache.org/jira/browse/HDFS-7285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14302086#comment-14302086
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Kai Zheng commented on HDFS-7285:
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bq.I think we need to allow dynamic stripe cell size
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https://issues.apache.org/jira/browse/HDFS-7285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14302602#comment-14302602
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Kai Zheng commented on HDFS-7285:
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I'm not sure storage policy can cover all the cases and
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Kai Zheng commented on HDFS-7285:
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Yes we have EC zones, each zone actually represents a
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Kai Zheng commented on HDFS-7349:
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Sorry I missed this. Will look at it today.
Support
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https://issues.apache.org/jira/browse/HDFS-7417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated HDFS-7417:
Fix Version/s: HDFS-EC
Raw XOR coder
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Key: HDFS-7417
URL:
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https://issues.apache.org/jira/browse/HDFS-7545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14301229#comment-14301229
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Kai Zheng commented on HDFS-7545:
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Hi Bo,
Can you open a sub-task JIRA for your first
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https://issues.apache.org/jira/browse/HDFS-7417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated HDFS-7417:
Attachment: HDFS-7417-v2.patch
Updated the patch merging latest changes on the branch.
Raw XOR coder
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https://issues.apache.org/jira/browse/HDFS-7417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated HDFS-7417:
Status: Patch Available (was: Open)
Raw XOR coder
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Key: HDFS-7417
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