Re: CASSANDRA-1472 (bitmap indexes)

2010-11-15 Thread dragos cernahoschi 
I've tested 0.7-beta3 branch index feature without the 1472 patch. The
queries on more than one column works better than the patched version, but
definitely not correctly.

1.
- query on 3 columns, start key 1, row count 1 => no results
- query on same columns, start key 1, row count 10 => 8 results

2.
- same query, start key 1, row count 2 => 1 result
- query again, start key = max (keys from prev query) + 1, row count 2
=>*time out, infinite cycle
*

3. Is there any example on the pagination feature? (without knowing the
expected number of rows).

Will the get_indexed_slices return an empty list when there is no more
results?

- query on 1 column, start key 1, row count 1000 => ok
- same query, start key = max (keys from prev query) + 1, row count 1000 =>
ok
...
- *at some point the max (keys from prev query) < startkey and my pagination
loop runs forever*

Maybe I'm missing something on this.

4.
- query on 1 column, row count 1000 => ok
- query on 3 columns, row count 100 => time out (there is no infinite loop,
the thread eventually terminates)

Dragos

On Sun, Nov 14, 2010 at 2:34 AM, Stu Hood  wrote:

> > Is it worth testing 0.7-branch-without-1472 to make sure of that?
> Dragos: if you have time, this would be helpful. If you already have a KEYS
> index created, you shouldn't need to re-load the data, as the file format
> hasn't changed.
>
> Thanks,
> Stu
>
> On Sat, Nov 13, 2010 at 4:40 PM, Jonathan Ellis  wrote:
>
> > Is it worth testing 0.7-branch-without-1472 to make sure of that?
> >
> > On Fri, Nov 12, 2010 at 10:28 AM, Stu Hood  wrote:
> > > Great, thanks for the variable Dragos: I'm fairly sure I broke this in
> > the
> > > refactoring I did in 1472 to fit in a second index type.
> > >
> > >
> > > On Fri, Nov 12, 2010 at 4:03 AM, dragos cernahoschi <
> > > dragos.cernahos...@gmail.com> wrote:
> > >
> > >> I confirm: the KEYS indexes have the same behavior as the KEYS_BITMAP
> > >> indexes: time out/succeed on the same queries.
> > >>
> > >> By the way, the insert of my data set with KEYS_BITMAP is much faster
> > than
> > >> KEYS (about 5.5 times) and less gc intensive.
> > >>
> > >> Dragos
> > >>
> > >> On Tue, Nov 9, 2010 at 8:05 PM, Stu Hood 
> > wrote:
> > >>
> > >> > Interesting, thanks for the info.
> > >> >
> > >> > Perhaps the limitation is that index queries involving multiple
> > clauses
> > >> are
> > >> > currently implemented using brute-force filtering rather than an
> index
> > >> join?
> > >> > The bitmap indexes have native support for this type of join, but
> it's
> > >> not
> > >> > being used yet.
> > >> >
> > >> > To confirm: have you tried the same scenario with KEYS indexes? They
> > use
> > >> > the same codepath for multiple index expressions, and should
> > experience
> > >> the
> > >> > same timeouts. Also, can you rerun the KEYS_BITMAP test with DEBUG
> > >> logging
> > >> > enabled, to ensure that we aren't going into some kind of infinite
> > loop?
> > >> >
> > >> > Thanks for the help,
> > >> > Stu
> > >> >
> > >> > -Original Message-
> > >> > From: "dragos cernahoschi" 
> > >> > Sent: Tuesday, November 9, 2010 11:50am
> > >> > To: dev@cassandra.apache.org
> > >> > Subject: Re: CASSANDRA-1472 (bitmap indexes)
> > >> >
> > >> > I'm running the query on three columns with cardinalities: 22, 17
> and
> > >> > 10.
> > >> > Interesting, if combining columns with cardinalities:
> > >> >
> > >> > 22 + 17 => no exception
> > >> > 22 + 10 => no exception
> > >> > 10 + 17 => timed out exception
> > >> > 22 + 17 + 10 => timed out exception
> > >> >
> > >> >
> > >> > On Tue, Nov 9, 2010 at 6:29 PM, Stu Hood 
> > wrote:
> > >> >
> > >> > > Can you tell me a little bit about your key distribution? How many
> > >> unique
> > >> > > values are indexed (the cardinality)?
> > >> > >
> > >> > > Until the OrBiC projection I mention on 1472 is implemented, the
> > >> > > bitmap
> > >> > > secondary indexes will perform terribly for high cardinality
> > datasets.
> > >> > >
> > >> > > Thanks!
> > >> > >
> > >> > >
> > >> > > -Original Message-
> > >> > > From: "dragos cernahoschi" 
> > >> > > Sent: Tuesday, November 9, 2010 10:14am
> > >> > > To: dev@cassandra.apache.org
> > >> > > Subject: Re: CASSANDRA-1472 (bitmap indexes)
> > >> > >
> > >> > > Meantime the number of SSTable(s) reduced to just 7. Initially the
> > >> > > compaction thread suffered the same problem of "too many open
> files"
> > >> and
> > >> > > couldn't do any compaction.
> > >> > >
> > >> > > But I'm still not able to run my tests: TimedOutException :(
> > >> > >
> > >> > > On Tue, Nov 9, 2010 at 5:51 PM, Stu Hood 
> > >> wrote:
> > >> > >
> > >> > > > Hmm, 500 sstables is definitely a degenerate case: did you
> disable
> > >> > > > compaction? By default, Cassandra strives to keep the sstable
> > count
> > >> > below
> > >> > > > ~32, since accesses to separate sstables require seeks.
> > >> > > >
> > >> > > > In this case, the query will seek 500 times to check the
> secondary
> > >> > index

Re: CASSANDRA-1472 (bitmap indexes)

2010-11-15 Thread Jonathan Ellis 
On Mon, Nov 15, 2010 at 5:57 AM, dragos cernahoschi
 wrote:
> I've tested 0.7-beta3 branch index feature without the 1472 patch. The
> queries on more than one column works better than the patched version, but
> definitely not correctly.

Please test 0.7 branch head, as you can see from the CHANGES there
have been a lot of fixes.

> 1.
> 2.
> 4.

Should be fixed in head.

> 3. Is there any example on the pagination feature? (without knowing the
> expected number of rows).

Same way you paginate through range slices or columns within a row,
set start to the last result you got w/ previous query.

> Will the get_indexed_slices return an empty list when there is no more
> results?

No, all queries are start-inclusive.

-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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Build failed in Hudson: Cassandra-0.6 #1

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build-subprojects:

init:
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gen-cli-grammar:
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build-project:
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[junit]  and 
jar:
[junit] Testsuite: 
org.apache.cassandra.concurrent.DebuggableThreadPoolExecutorTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.615 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.ColumnFamilyStoreTest
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.935 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.ColumnFamilyTest
[junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.431 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.CommitLogTest
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.636 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.CompactionsPurgeTest
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[junit] 
[junit] Testsuite: org.apache.cassandra.db.CompactionsTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 1.477 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.MultitableTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.58 sec
[junit] 
[junit] Testsuite: org.apache.cassandra.db.NameSortTest
[junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 4.459 sec
[junit] 
[junit] Testsuite: org.apache.c

Build failed in Hudson: Cassandra-0.6 #2

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[junit] Testsuite: org.apache.cassandra.db.RemoveSubColumnTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.698 sec
[junit] 
[junit] Cobertura: Loaded information on 696 classes.
[junit] Cobertura: Saved information on 696 classes.
[junit] Testsuite: org.apache.cassandra.db.RemoveSuperColumnTest
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.822 sec
[junit] 
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[junit] Testsuite: org.apache.cassandra.db.RowTest
[junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.448 sec
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[junit] Testsuite: org.apache.cassandra.db.SuperColumnTest
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[junit] Testsuite: org.apache.cassandra.db.SystemTableTest
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.668 sec
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[junit] Testsuite: org.apache.cassandra.db.TableTest
[junit] Tests run: 9, Failures: 0, Errors: 0, Time elapsed: 3.842 sec
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[junit] Cobertura: Loaded information on 696 classes.
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[junit] Testsuite: org.apache.cassandra.db.TimeSortTest
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 4.294 sec
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[junit] Testsuite: org.apache.cassandra.db.marshal.TimeUUIDTypeTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.093 sec
[junit] 
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[junit] Testsuite: org.apache.cassandra.db.marshal.TypeCompareTest
[junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.221 sec
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[junit] Testsuite: org.apache.cassandra.dht.BootStrapperTest
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[junit] Testsuite: 
org.apache.cassandra.dht.CollatingOrderPreservingPartitionerTest
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[junit] Cobertura: Saved information on 696 classes.
[junit] Testsuite: org.apache.cassandra.dht.OrderPreservingPartitionerTest
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[junit] Testsuite: org.apache.cassandra.dht.RandomPartitionerTest
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[junit] Testsuite: org.apache.cassandra.gms.ArrivalWindowTest
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[junit] Testsuite: org.apache.cassandra.gms.GossipDigestTest
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[junit] 
[junit] Cobertura: Loaded information on 696 classes.
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[junit] Testsuite: org.apache.cassandra.hadoop.ColumnFamilyInputFormatTest
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[junit] 
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[junit] T

Build failed in Hudson: Cassandra-0.7 #5

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[junit] Cobertura: Loaded information on 956 classes.
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[junit] Testsuite: org.apache.cassandra.io.util.BufferedRandomAccessFileTest
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.107 sec
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[junit] Testsuite: org.apache.cassandra.locator.DynamicEndpointSnitchTest
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[junit] Testsuite: org.apache.cassandra.locator.NetworkTopologyStrategyTest
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[junit] Testsuite: 
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[junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.422 sec
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[junit] Testsuite: 
org.apache.cassandra.locator.ReplicationStrategyEndpointCacheTest
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.739 sec
[junit] 
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[junit] Testsuite: org.apache.cassandra.locator.SimpleStrategyTest
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.77 sec
[junit] 
[junit] Cobertura: Loaded information on 956 classes.
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[junit] Testsuite: org.apache.cassandra.locator.TokenMetadataTest
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.498 sec
[junit] 
[junit] Cobertura: Loaded information on 956 classes.
[junit] Cobertura: Saved information on 956 classes.
[junit] Testsuite: org.apache.cassandra.service.AntiEntropyServiceTest
[junit] Exception in thread "Thread-5" java.lang.RuntimeException: 
java.lang.NullPointerException
[junit] at 
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34)
[junit] at 
org.apache.cassandra.streaming.StreamInSession.closeIfFinished(StreamInSession.java:162)
[junit] at 
org.apache.cassandra.streaming.IncomingStreamReader.read(IncomingStreamReader.java:66)
[junit] at 
org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:75)
[junit] Caused by: java.lang.NullPointerException
[junit] at 
org.apache.cassandra.service.AntiEntropyService.completedRequest(AntiEntropyService.java:133)
[junit] at 
org.apache.cassandra.service.AntiEntropyService$Differencer$Callback.runMayThrow(AntiEntropyService.java:558)
[junit] at 
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
[junit] ... 3 more
[junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 4.235 sec
[junit] 
[junit] - Standard Error -
[junit]  WARN 20:25:24,848 Generated random token 
Token(bytes[6905d67dc4ba42f72c87269d9ecca449]). Random tokens will result in an 
unbalanced ring; see http://wiki.apache.org/cassandra/Operations
[junit] -  ---
[junit] Cobertura: Loaded information on 956 classes.
[junit] Cobertura: Saved information on 956 classes.
[junit] Testsuite: org.apache.cassandra.service.CassandraServerTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.36 sec
[junit] 
[junit] Cobertura: Loaded information on 956 classes.
[junit] Cobertura: Saved information on 956 classes.
[junit] Testsuite: org.apache.cassandra.service.EmbeddedCassandraServiceTest
[junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 1.174 sec
[junit] 
[junit] - Standard Error -
[junit]  WARN 20:25:35,974 Unable to lock JVM memory (ENOMEM). This can 
result in part of the JVM being swapped out, especially with mmapped I/O 
enabled. Increase RLIMIT_MEMLOCK or run Cassandra as root.
[junit]  WARN 20:25:36,470 Generated random token 
Token(bytes[06a824e4b793741c94e22b4dfba202c9]). Random tokens will result in an 
unbalanced ring; see http://wiki.apache.org/cassandra/Operations
[junit] -  ---
[junit] Cobertura: Loaded information on 956 classes.
[junit] Cobertura: Saved information on 956 classes.
[junit] Testsuite: org.apache.cassandra.service.MoveTest
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 1.646 sec
[junit] 
[junit] -

Build failed in Hudson: Cassandra-0.6 #3

2010-11-15 Thread Apache Hudson Server 
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Hudson build is back to normal : Cassandra-0.6 #4

2010-11-15 Thread Apache Hudson Server 
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Re: Hudson build is back to normal : Cassandra-0.6 #4

2010-11-15 Thread Eric Evans 
On Mon, 2010-11-15 at 21:16 +, Apache Hudson Server wrote:
> See 

Damn.  About time.

So, if it's no obvious by now, I've added Hudson jobs for the 0.6 and
0.7 branches.  There are a few other things I want to get working, like
the `long-test' target, but I'll let everyone enjoy a little peace and
quiet before digging in again.

-- 
Eric Evans
eev...@rackspace.com

Build failed in Hudson: Cassandra-0.7 #6

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Hudson build is back to normal : Cassandra-0.7 #7

2010-11-15 Thread Apache Hudson Server 
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