Interesting... if I switch the columns to be UTF8 instead of integers, like
this:
create column family IndexTest with
key_validation_class = UTF8Type
and comparator = UTF8Type
and column_metadata = [
{column_name:year, validation_class:UTF8Type, index_type: KEYS},
{column_name:month, validation_class:UTF8Type, index_type: KEYS},
{column_name:day, validation_class:UTF8Type, index_type: KEYS},
{column_name:hour, validation_class:UTF8Type, index_type: KEYS},
{column_name:minute, validation_class:UTF8Type, index_type: KEYS},
{column_name:data, validation_class:UTF8Type}
];
And change the hector code to use setString(...) instead of setInteger(...).
Then everything works fine. Is there a CQL bug with respect to non-string
columns?
Thanks,
-nate
From: Nate Sammons [mailto:nsamm...@ften.com]
Sent: Tuesday, November 08, 2011 11:14 AM
To: user@cassandra.apache.org
Subject: RE: Secondary index issue, unable to query for records that should be
there
Note that I had identical behavior using a fresh download of Cassandra 1.0.2 as
of today.
Thanks,
-nate
From: Nate Sammons [mailto:nsamm...@ften.com]<mailto:[mailto:nsamm...@ften.com]>
Sent: Tuesday, November 08, 2011 10:20 AM
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: RE: Secondary index issue, unable to query for records that should be
there
I restarted with logging turned up to DEBUG, and after quite a bit of logging
during startup, I re-ran a query:
get IndexTest where year=2011 and month=1 and day=14 and hour=18 and minute=49;
produced the following in the following:
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,823 CassandraServer.java (line 728)
scan
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,824 StorageProxy.java (line 1017)
restricted ranges for query [-1,-1] are
[[-1,160425280223280959086247334056682279392],
(160425280223280959086247334056682279392,-1]]
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,824 StorageProxy.java (line 1104)
scan ranges are
[-1,160425280223280959086247334056682279392],(160425280223280959086247334056682279392,-1]
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,825 ReadCallback.java (line 77)
Blockfor/repair is 1/false; setting up requests to natebookpro/127.0.1.1
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,826 StorageProxy.java (line 1131)
reading
org.apache.cassandra.db.IndexScanCommand@7bc203c<mailto:org.apache.cassandra.db.IndexScanCommand@7bc203c>
from natebookpro/127.0.1.1
DEBUG [ReadStage:46] 2011-11-08 10:19:21,827 KeysSearcher.java (line 96)
Primary scan clause is minute
DEBUG [ReadStage:46] 2011-11-08 10:19:21,827 KeysSearcher.java (line 109)
Expanding slice filter to entire row to cover additional expressions
DEBUG [ReadStage:46] 2011-11-08 10:19:21,827 KeysSearcher.java (line 151)
Scanning index 'IndexTest.minute EQ 49' starting with
DEBUG [ReadStage:46] 2011-11-08 10:19:21,827 CollationController.java (line
189) collectAllData
DEBUG [ReadStage:46] 2011-11-08 10:19:21,828 KeysSearcher.java (line 163)
fetched null
DEBUG [ReadStage:46] 2011-11-08 10:19:21,828 IndexScanVerbHandler.java (line
46) Sending RangeSliceReply{rows=} to
808@natebookpro/127.0.1.1<mailto:808@natebookpro/127.0.1.1>
DEBUG [RequestResponseStage:21] 2011-11-08 10:19:21,829
ResponseVerbHandler.java (line 44) Processing response on a callback from
808@natebookpro/127.0.1.1<mailto:808@natebookpro/127.0.1.1>
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,829 ReadCallback.java (line 77)
Blockfor/repair is 1/false; setting up requests to natebookpro/127.0.1.1
DEBUG [pool-2-thread-3] 2011-11-08 10:19:21,830 StorageProxy.java (line 1131)
reading
org.apache.cassandra.db.IndexScanCommand@6a25a21d<mailto:org.apache.cassandra.db.IndexScanCommand@6a25a21d>
from natebookpro/127.0.1.1
DEBUG [ReadStage:47] 2011-11-08 10:19:21,831 KeysSearcher.java (line 96)
Primary scan clause is minute
DEBUG [ReadStage:47] 2011-11-08 10:19:21,832 KeysSearcher.java (line 109)
Expanding slice filter to entire row to cover additional expressions
DEBUG [ReadStage:47] 2011-11-08 10:19:21,832 KeysSearcher.java (line 151)
Scanning index 'IndexTest.minute EQ 49' starting with
DEBUG [ReadStage:47] 2011-11-08 10:19:21,832 CollationController.java (line
189) collectAllData
DEBUG [ReadStage:47] 2011-11-08 10:19:21,832 KeysSearcher.java (line 163)
fetched null
DEBUG [ReadStage:47] 2011-11-08 10:19:21,833 IndexScanVerbHandler.java (line
46) Sending RangeSliceReply{rows=} to
809@natebookpro/127.0.1.1<mailto:809@natebookpro/127.0.1.1>
DEBUG [RequestResponseStage:22] 2011-11-08 10:19:21,834
ResponseVerbHandler.java (line 44) Processing response on a callback from
809@natebookpro/127.0.1.1<mailto:809@natebookpro/127.0.1.1>
Whereas a direct read of a key using "get IndexTest[2011-1-14-18-49--1];"
produced a result, and the following in the logs:
DEBUG [pool-2-thread-2] 2011-11-08 10:11:20,153 CassandraServer.java (line 323)
get_slice
DEBUG [pool-2-thread-2] 2011-11-08 10:11:20,159 StorageProxy.java (line 623)
Command/ConsistencyLevel is SliceFromReadCommand(table='Test',
key='323031312d312d31342d31382d34392d2d31',
column_parent='QueryPath(columnFamilyName='IndexTest', superColumnName='null',
columnName='null')', start='', finish='', reversed=false, count=1000000)/ONE
DEBUG [pool-2-thread-2] 2011-11-08 10:11:20,159 ReadCallback.java (line 77)
Blockfor/repair is 1/true; setting up requests to natebookpro/127.0.1.1
DEBUG [pool-2-thread-2] 2011-11-08 10:11:20,159 StorageProxy.java (line 639)
reading data locally
DEBUG [ReadStage:37] 2011-11-08 10:11:20,160 StorageProxy.java (line 792)
LocalReadRunnable reading SliceFromReadCommand(table='Test',
key='323031312d312d31342d31382d34392d2d31',
column_parent='QueryPath(columnFamilyName='IndexTest', superColumnName='null',
columnName='null')', start='', finish='', reversed=false, count=1000000)
DEBUG [ReadStage:37] 2011-11-08 10:11:20,161 CollationController.java (line
189) collectAllData
DEBUG [ReadStage:37] 2011-11-08 10:11:20,162 SliceQueryFilter.java (line 123)
collecting 0 of 1000000: data:false:512@1320769510502017
DEBUG [ReadStage:37] 2011-11-08 10:11:20,163 SliceQueryFilter.java (line 123)
collecting 1 of 1000000: day:false:4@1320769510502014
DEBUG [ReadStage:37] 2011-11-08 10:11:20,163 SliceQueryFilter.java (line 123)
collecting 2 of 1000000: hour:false:4@1320769510502015
DEBUG [ReadStage:37] 2011-11-08 10:11:20,163 SliceQueryFilter.java (line 123)
collecting 3 of 1000000: minute:false:4@1320769510502016
DEBUG [ReadStage:37] 2011-11-08 10:11:20,163 SliceQueryFilter.java (line 123)
collecting 4 of 1000000: month:false:4@1320769510502013
DEBUG [ReadStage:37] 2011-11-08 10:11:20,163 SliceQueryFilter.java (line 123)
collecting 5 of 1000000: year:false:4@1320769510502012
DEBUG [pool-2-thread-2] 2011-11-08 10:11:20,170 StorageProxy.java (line 689)
Read: 10 ms.
Note that a query for "get IndexTest where minute=49" (which also returns no
records) results in the following logs:
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,210 CassandraServer.java (line 728)
scan
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,211 StorageProxy.java (line 1017)
restricted ranges for query [-1,-1] are
[[-1,160425280223280959086247334056682279392],
(160425280223280959086247334056682279392,-1]]
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,211 StorageProxy.java (line 1104)
scan ranges are
[-1,160425280223280959086247334056682279392],(160425280223280959086247334056682279392,-1]
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,212 ReadCallback.java (line 77)
Blockfor/repair is 1/false; setting up requests to natebookpro/127.0.1.1
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,212 StorageProxy.java (line 1131)
reading
org.apache.cassandra.db.IndexScanCommand@547d6c11<mailto:org.apache.cassandra.db.IndexScanCommand@547d6c11>
from natebookpro/127.0.1.1
DEBUG [ReadStage:42] 2011-11-08 10:13:40,213 KeysSearcher.java (line 96)
Primary scan clause is minute
DEBUG [ReadStage:42] 2011-11-08 10:13:40,213 KeysSearcher.java (line 109)
Expanding slice filter to entire row to cover additional expressions
DEBUG [ReadStage:42] 2011-11-08 10:13:40,214 KeysSearcher.java (line 151)
Scanning index 'IndexTest.minute EQ 49' starting with
DEBUG [ReadStage:42] 2011-11-08 10:13:40,214 CollationController.java (line
189) collectAllData
DEBUG [ReadStage:42] 2011-11-08 10:13:40,214 KeysSearcher.java (line 163)
fetched null
DEBUG [ReadStage:42] 2011-11-08 10:13:40,214 IndexScanVerbHandler.java (line
46) Sending RangeSliceReply{rows=} to
462@natebookpro/127.0.1.1<mailto:462@natebookpro/127.0.1.1>
DEBUG [RequestResponseStage:17] 2011-11-08 10:13:40,215
ResponseVerbHandler.java (line 44) Processing response on a callback from
462@natebookpro/127.0.1.1<mailto:462@natebookpro/127.0.1.1>
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,216 ReadCallback.java (line 77)
Blockfor/repair is 1/false; setting up requests to natebookpro/127.0.1.1
DEBUG [pool-2-thread-2] 2011-11-08 10:13:40,216 StorageProxy.java (line 1131)
reading
org.apache.cassandra.db.IndexScanCommand@62132898<mailto:org.apache.cassandra.db.IndexScanCommand@62132898>
from natebookpro/127.0.1.1
DEBUG [ReadStage:43] 2011-11-08 10:13:40,217 KeysSearcher.java (line 96)
Primary scan clause is minute
DEBUG [ReadStage:43] 2011-11-08 10:13:40,217 KeysSearcher.java (line 109)
Expanding slice filter to entire row to cover additional expressions
DEBUG [ReadStage:43] 2011-11-08 10:13:40,218 KeysSearcher.java (line 151)
Scanning index 'IndexTest.minute EQ 49' starting with
DEBUG [ReadStage:43] 2011-11-08 10:13:40,218 CollationController.java (line
189) collectAllData
DEBUG [ReadStage:43] 2011-11-08 10:13:40,218 KeysSearcher.java (line 163)
fetched null
DEBUG [ReadStage:43] 2011-11-08 10:13:40,218 IndexScanVerbHandler.java (line
46) Sending RangeSliceReply{rows=} to
463@natebookpro/127.0.1.1<mailto:463@natebookpro/127.0.1.1>
DEBUG [RequestResponseStage:18] 2011-11-08 10:13:40,219
ResponseVerbHandler.java (line 44) Processing response on a callback from
463@natebookpro/127.0.1.1<mailto:463@natebookpro/127.0.1.1>
Thanks,
-nate
From: Jake Luciani [mailto:jak...@gmail.com]<mailto:[mailto:jak...@gmail.com]>
Sent: Tuesday, November 08, 2011 8:56 AM
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: Re: Secondary index issue, unable to query for records that should be
there
Hi Nate,
Could you try running it with debug enabled on the logs? it will give more
insite into what's going on.
-Jake
On Tue, Nov 8, 2011 at 3:45 PM, Nate Sammons
<nsamm...@ften.com<mailto:nsamm...@ften.com>> wrote:
This is against a single server, not a cluster. Replication factor for the
keyspace is set to 1, CL is the default for Hector, which I think is QUORUM.
I'm trying to get a simple test together that shows this. Does anyone know if
multiple indexes like this are efficient?
Thanks,
-nate
From: Riyad Kalla [mailto:rka...@gmail.com<mailto:rka...@gmail.com>]
Sent: Monday, November 07, 2011 4:31 PM
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: Re: Secondary index issue, unable to query for records that should be
there
Nate, is this all against a single Cassandra server, or do you have a ring
setup? If you do have a ring setup, what is your replicationfactor set to? Also
what ConsistencyLevel are you writing with when storing the values?
-R
On Mon, Nov 7, 2011 at 2:43 PM, Nate Sammons
<nsamm...@ften.com<mailto:nsamm...@ften.com>> wrote:
Hello,
I'm experimenting with Cassandra (DataStax Enterprise 1.0.3), and I've got a CF
with several secondary indexes to try out some options. Right now I have the
following to create my CF using the CLI:
create column family MyTest with
key_validation_class = UTF8Type
and comparator = UTF8Type
and column_metadata = [
-- absolute timestamp for this message, also indexed
year/month/day/hour/minute
-- index these as they are low cardinality
{column_name:messageTimestamp, validation_class:LongType},
{column_name:messageYear, validation_class:IntegerType, index_type: KEYS},
{column_name:messageMonth, validation_class:IntegerType, index_type:
KEYS},
{column_name:messageDay, validation_class:IntegerType, index_type: KEYS},
{column_name:messageHour, validation_class:IntegerType, index_type: KEYS},
{column_name:messageMinute, validation_class:IntegerType, index_type:
KEYS},
... other non-indexed columns defined
];
So when I insert data, I calculate a year/month/day/hour/minute and set these
values on a Hector ColumnFamilyUpdater instance and update that way. Then
later I can query from the command line with CQL such as:
get MyTest where messageYear=2011 and messageMonth=6 and
messageDay=1 and messageHour=13 and messageMinute=44;
etc. This generally works, however at some point queries that I know should
return data no longer return any rows.
So for instance, part way through my test (inserting 250K rows), I can query
for what should be there and get data back such as the above query, but later
that same query returns 0 rows. Similarly, with fewer clauses in the
expression, like this:
get MyTest where messageYear=2011 and messageMonth=6;
Will also return 0 rows.
???????
Any idea what could be going wrong? I'm not getting any exceptions in my
client during the write, and I don't see anything in the logs (no errors
anyway).
A second question - is what I'm doing insane? I'm not sure that performance on
CQL queries with multiple indexed columns is good (does Cassandra intelligently
use all available indexes on these queries?)
Thanks,
-nate
--
http://twitter.com/tjake
