I've just opened a new JIRA: CASSANDRA-4142
I've double checked numbers, 7747 seems to be array list object's capacity
(Eclipse Memory Analyzer displays "java.lang.Object[7747] @ 0x7d3f3f798").
Actually there are 5757 browsable entries in EMA therefore each object is
about 140 KB (size varies be
Can a super column contain a super column?
I mean is nesting of supercolumns possible?
Regards,
Puneet :)
No.
Maybe that a super column can contain composite columns but I'm not sure.
Paolo
On Apr 12, 2012 12:15 PM, "puneet loya" wrote:
> Can a super column contain a super column?
>
> I mean is nesting of supercolumns possible?
>
> Regards,
>
> Puneet :)
>
what is composite columns?
super column under it can contain just multiple columns.. will composite
columns be useful?
On Thu, Apr 12, 2012 at 3:50 PM, Paolo Bernardi wrote:
> No.
> Maybe that a super column can contain composite columns but I'm not sure.
>
> Paolo
> On Apr 12, 2012 12:15 PM, "
http://www.datastax.com/dev/blog/introduction-to-composite-columns-part-1
hope this help.
maki
2012/4/12 puneet loya :
> what is composite columns?
>
> super column under it can contain just multiple columns.. will composite
> columns be useful?
>
>
> On Thu, Apr 12, 2012 at 3:50 PM, Paolo Bernar
I also noticed that if I use the -pr option, the repair process went down
from 30 hours to 9 hours. Is the -pr option safe to use if I want to run
repair processes in parallel on nodes that are not replication peers?
thanks
On Thu, Apr 12, 2012 at 12:06 AM, Frank Ng wrote:
> Thank you for conf
Hello Aaron,
Thank you for getting back to me.
I will change to m1.large first to see how long it will take Cassandra node
to die (if at all). If again not happy I will try more memory. I just want
to test it step by step and see what the differences are. I will also
change the cassandra-env file
On Thu, Apr 12, 2012 at 4:06 PM, Frank Ng wrote:
> I also noticed that if I use the -pr option, the repair process went down
> from 30 hours to 9 hours. Is the -pr option safe to use if I want to run
> repair processes in parallel on nodes that are not replication peers?
There is pretty much two
Never mind.
Double quotes within the single quotes worked:
select * from solr where solr_query='body:"sixty eight million nine
hundred forty three thousand four hundred twenty four"';
On Thu, Apr 12, 2012 at 11:42 AM, A J wrote:
> What is the syntax for a string match in CQL for solr_query ?
>
>
Hi,
Cassandra issues an mlockall [1] before mmap-ing sstables to prevent
the kernel from paging out heap space in favor of memory-mapped
sstables. I was wondering, what happens to the off-heap row cache
(saved or unsaved)? Is it possible that the kernel pages out off-heap
row cache in favor of res
I am currently working on a data model where the purpose is to look up
multiple products for given days of the year. Right now, that model
involves the usage of a super column family. e.g.
"2012-04-12": {
"product_id_1": {
price: 12.44,
tax: 1.00,
fees: 3.00,
},
"product_id_2":
If you want to reduce the number of columns, you could pack all the data
for a product into one column, as in
composite column name-> product_id_1:12.44:1.00:3.00
On 04/12/2012 03:03 PM, Philip Shon wrote:
I am currently working on a data model where the purpose is to look up
multiple produ
Thanks for the clarification. I'm running repairs as in case 2 (to avoid
deleted data coming back).
On Thu, Apr 12, 2012 at 10:59 AM, Sylvain Lebresne wrote:
> On Thu, Apr 12, 2012 at 4:06 PM, Frank Ng wrote:
> > I also noticed that if I use the -pr option, the repair process went down
> > from
>From my experience I would strongly advise against leveled compaction
for your use-case. But you should certainly test and see for yourself!
I have ~1TB on a node with ~13GB of heap. I ended up with 30k SSTables.
I raised the SSTable size to 100MB but that didn't prove to be
sufficient and I did i
Hello,
I'm doing compactions under 0.8.8.
Recently, I started seeing a stack trace like one below, and I can't
figure out what causes this to appear.
The cluster has been in operation for mode than half a year w/o errors
like this one.
Any help will be appreciated,
Thanks
Maxim
WARNING: F
It depends on a lot of things: schema size, caches, work load etc.
If your are just starting out I would recommend using a machine with 8gb or
16gb total ram. By default cassandra will take about 4gb or 8gb (respectively)
for the JVM.
Once you have a feel for how things work you should be able
If this is write once read many data you may get some benefit from packing all
the info for a product into one column, using something like JSON for the
column value.
>> The one thing that stands out to me with this approach is the number of
>> additonal columns that will be created for a sing
Look at the server side logs for errors.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 13/04/2012, at 11:47 AM, Maxim Potekhin wrote:
> Hello,
>
> I'm doing compactions under 0.8.8.
>
> Recently, I started seeing a stack trace like one
I m able to connect cassandra and fetch rows from the cassandra database.
Now i want to insert the data from .net on to cassandra
but using insert query of cql is not working because i have fields in my
table which has null values for the columns and cassandra would not take
null values.
So now
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