specific use case, what would work best is to have a composite
key that is a CompositeType with thousands of columns each.
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
)?
In my specific use case, what would work best is to have a composite
key that is a CompositeType with thousands of columns each.
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
--
Donal Zang
Computing Center, IHEP
19B
of counters.
If counters are not idempotent, are there examples of effective uses of
counters that will prevent inconsistent counts?
Thank you for your help.
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
is
replicate_on_write=false, you have to declare it explicitly.
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
.
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
{*
*Name: Vivs*
*country: USA*
*}*
Now if I want to retrieve a super column whose rowkey is 'DEPT1' and
employee name is 'Vivek'. Can I get only 'EMPLOYEE1' ?
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
the secondary index. (this method may need the CompositeType
[3])
[1] https://issues.apache.org/jira/browse/CASSANDRA-1472
[2] http://www.anuff.com/2010/07/secondary-indexes-in-cassandra.html
[3] https://issues.apache.org/jira/browse/CASSANDRA-2231
--
Donal Zang
Computing Center, IHEP
19B YuquanLu
out from time to time (with
pycassa.ConnectionPool('keyspace1', ['host1','host2'], timeout=600,
pool_size=1) ).
Does some one else have some same experiences using the secondary indexes?
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
I did a insertion test with and without secondary indexes, and found that:
Without secondary index: ~10864 rows inserted per second
With secondary index on one column(BytesType): ~1515 rows inserted per
second
Is this normal? why secondary index would have so much affect?
I noticed that If I
Hi,
I'm query on cassandra like select count(*) from table where column1 =
v1 and ..., based on a secondary index on column1.
But using get_indexed_slices(), I have to fetch all the rows and count
on them, which is not needed.
So a get_indexed_slices count api [1] would be very helpful, but it
Hi,
Is there a time planed for 0.8.1 release?
I want to use the CompositeType comparer :
https://issues.apache.org/jira/browse/CASSANDRA-2231
Thanks!
Donal
Can we do count like this?
/count cf[startKey:endKey] where column = value/
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
(MessageDeliveryTask.java:72)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
--
Donal Zang
CERN PH-ADP-DDM 40-3-D16
CH-1211 Geneve 23
rt
--
Donal Zang
On 20/01/2011 17:51, Sébastien Druon wrote:
Hello!
I am using cassandra on a ubuntu machine and installed it from the
binary found on the cassandra home page.
However, I did not find any scripts to start it up at boot time.
Where can I find this kind of script?
Thanks a lot in advance
Just to ensure.
So this should be done manually by the cluster operators?
Thanks!
--
On 17/01/2011 11:55, kh jo wrote:
What is the best way to model a query with between clause.. given that
you have a large number of entries...
thanks
Jo
In my experience,for the row based 'between clause' with a random
partition, you should design the column family carefully, So that you
Hi,
I'm using 0.7.0-rc1,and when I use cassandra-cli to create a column
family with metadata, I got null,and no column family is created.
The command I use is:
/create keyspace test;
use test;
create column family test1 with column_type = 'Super' and comparator =
'LongType' and
RT.
Is there any command or api?
Thanks!
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