gmane.comp.java.hadoop.hbase.devel

Re: Reads are very slow

Doug Meil — 2013-05-21T15:19:22

Hi there,

One thing to point out is that GZ compression is the tightest but slowest compression algorithm.  If speed is important, probably want to look at Snappy for your CF compression algorithm.



From: Vibhav Mundra <mundra-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org<mailto:mundra-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>>
Reply-To: "dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org<mailto:dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org>" <dev-50Pas4EWwPE< at >public.gmane.orgache.org<mailto:dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org>>
Date: Tuesday, May 21, 2013 6:21 AM
To: "dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org<mailto:dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org>" <dev-50Pas4EWwPF62goIzvmr9g< at >public.gmane.orgrg<mailto:dev-50Pas4EWwPEyzMRdD/IqWQ< at >public.gmane.org>>
Subject: Reads are very slow

Hi All,

 I am trying to use Hbase as a key-value store, where the key is stored as row-key and the value as a column family.

The desc of the table is as follows:
 {NAME => 'cookies', FAMILIES => [{NAME => 'cf', DATA_BLOCK_E

Build failed in Jenkins: HBase-0.94 #992

Apache Jenkins Server — 2013-05-21T11:10:23

See <https://builds.apache.org/job/HBase-0.94/992/changes>

Changes:

[larsh] HBASE-8282 User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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Running org.apache.hadoop.hbase.coprocessor.TestRegionObserverScannerOpenHook
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Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 50.641 sec
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Build failed in Jenkins: HBase-0.94-security #148

Apache Jenkins Server — 2013-05-21T11:00:21

See <https://builds.apache.org/job/HBase-0.94-security/148/changes>

Changes:

[larsh] HBASE-8282 User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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Running org.apache.hadoop.hbase.procedure.TestZKProcedure
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Running org.apache.hadoop.hbase.mapreduce.TestImportT

Reads are very slow

Vibhav Mundra — 2013-05-21T10:21:17

Hi All,

 I am trying to use Hbase as a key-value store, where the key is stored as
row-key and the value as a column family.

The desc of the table is as follows:
 {NAME => 'cookies', FAMILIES => [{NAME => 'cf', DATA_BLOCK_ENCODING =>
'NONE', BLOOMFILTER => 'ROWCOL', true

  REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'GZ',
MIN_VERSIONS => '0', TTL => '214748364

 7', KEEP_DELETED_CELLS => 'false', BLOCKSIZE => '8192', IN_MEMORY =>
'false', ENCODE_ON_DISK => 'true',

  BLOCKCACHE => 'true'}]}



I am accessing the values using rest API.

curl -H "Accept:application/octet-stream"
http://10.4.41.133:10000/cookies/ed36b1d218315_ziv/cf:data

This is bound to return a single result, since it used as key-value pair.

Now the strange part is sometimes my request takes 40 millisecs to answer.
I am firing some 50000 request per second. Is there something I can do to
optimize. Basically I am looking at returning the results in 5 millisecs.

The hbase configuration is as:
1 node--> running hbase master a

Build failed in Jenkins: HBase-TRUNK-Hadoop-2 #287

2013-05-21T10:08:58

See <http://54.241.6.143/job/HBase-TRUNK-Hadoop-2/287/>

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Build failed in Jenkins: HBase-TRUNK #4134

Apache Jenkins Server — 2013-05-21T09:44:01

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Changes:

[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

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[jira] [Created] (HBASE-8584) increase unit-test coverage of class org.apache.hadoop.hbase.coprocessor.BaseMasterObserver

Ivan A. Veselovsky (JIRA — 2013-05-21T08:59:15

Ivan A. Veselovsky created HBASE-8584:
-----------------------------------------

             Summary: increase unit-test coverage of class org.apache.hadoop.hbase.coprocessor.BaseMasterObserver
                 Key: HBASE-8584
                 URL: https://issues.apache.org/jira/browse/HBASE-8584
             Project: HBase
          Issue Type: Test
            Reporter: Ivan A. Veselovsky




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Jenkins build is back to normal : hbase-0.95 #207

Apache Jenkins Server — 2013-05-21T08:02:34

See <https://builds.apache.org/job/hbase-0.95/207/changes>

Build failed in Jenkins: HBase-0.94-Security #168

2013-05-21T07:49:31

See <http://54.241.6.143/job/HBase-0.94-Security/168/changes>

Changes:

[Lars Hofhansl] HBASE-8282 User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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2013-05-21T07:47:45

See <http://54.241.6.143/job/HBase-0.94-Security-Hadoop-2/150/changes>

Changes:

[Lars Hofhansl] HBASE-8282 User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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See <http://54.241.6.143/job/HBase-0.94-Hadoop-2/150/changes>

Changes:

[Lars Hofhansl] HBASE-8282 User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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Running org.apache.hadoop.hbase.regionserver.TestRegionServerMetrics
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Build failed in Jenkins: HBase-TRUNK-on-Hadoop-2.0.0 #537

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Changes:

[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

[stack] HBASE-8579 TestDelayedRpc falis from time to time

[ramkrishna] HBASE-8282-User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

[stack] HBASE-8067 TestHFileArchiving.testArchiveOnTableDelete sometimes fails

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Re: Time to tie the bow around 0.94.8

lars hofhansl — 2013-05-21T05:33:54

I'm going to roll a 0.94.8RC tomorrow. If you have something that really cannot wait until 0.94.9 please let me know.

Build failed in Jenkins: hbase-0.95-on-hadoop2 #106

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See <https://builds.apache.org/job/hbase-0.95-on-hadoop2/106/changes>

Changes:

[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

[stack] HBASE-8579 TestDelayedRpc falis from time to time

[ramkrishna] HBASE-8282-User triggered flushes does not allow compaction to get triggered even if compaction criteria is met (Ram)

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[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

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Changes:

[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

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Running org.apache.hadoop.hbase.regionserver.TestMemStore
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Build failed in Jenkins: HBase-0.95 #298

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[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

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Changes:

[tedyu] HBASE-8582 Possible NullPointerException in ZKInterProcessLockBase#visitLocks (Ted Yu)

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[jira] [Created] (HBASE-8583) Create a new IntegrationTestBigLinkedListWithChaosMonkey

Jeffrey Zhong (JIRA — 2013-05-21T01:40:13

Jeffrey Zhong created HBASE-8583:
------------------------------------

             Summary: Create a new IntegrationTestBigLinkedListWithChaosMonkey
                 Key: HBASE-8583
                 URL: https://issues.apache.org/jira/browse/HBASE-8583
             Project: HBase
          Issue Type: Sub-task
          Components: test
            Reporter: Jeffrey Zhong
            Assignee: Jeffrey Zhong
             Fix For: 0.95.1




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