Does anyone know something about the following questions?
1. Does Cassandra support customized filter? customized filter means
programmer can define his desired filter to select the data.
2. Does Cassandra support trigger? trigger has the same meaning as in
RDBMS.
Thanks in advance.
Regards,
Fel
Is there any way to extract data information from the cassandra log
(commit-log) using a java program?
I tried to open this file using gedit or tail to look the 'structure' of
the cassandra loggin, but it doesn't works well.
Thanks in advance.
Regards,
Felipe Mathias Schmidt
*(Computer Science UF
Hello.
I'm trying to catch the serialized RowMutations from a CommitLogSegment to
capture the data change, but I don't have much idea about how to proceed.
Some one know a way of how to do it? I supposed that it would be kind of
simple.
Regards,
Felipe Mathias Schmidt
*(Computer Science UFRGS, RS
here, or if it has other way to take this information, please let me know.
Thanks in advance.
Regards,
Felipe Mathias Schmidt
*(Computer Science UFRGS, RS, Brazil)*
2012/10/1 Felipe Schmidt
> Hello.
>
> I'm trying to catch the serialized RowMutations from a CommitLogSegm
turns
null.
Do you have some idea about why is it happening?
Thank you very much.
Regards,
Felipe Mathias Schmidt
*(Computer Science UFRGS, RS, Brazil)*
2012/10/2 Ben Hood <0x6e6...@gmail.com>
> Filipe,
>
> On Tue, Oct 2, 2012 at 2:56 PM, Felipe Schmidt
> wrote:
> &
a little further about it.
>
> http://www.mail-archive.com/user@cassandra.apache.org/msg25033.html
>
>
> Cheers
>
> -
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 3/10/2012, at 8:24 PM, Felipe Schmidt
Hello!
I'm trying to get the column family type and I don't know why it's not
working.
I try to use the following code line:
Schema.instance.getColumnFamilyType("School", "Grades");
This Keyspace and Column Family are inserted in Cassandra and this method
only returns null. If I try to get some i
I'm having some problems during running a Map Reduce program using
Cassandra as input.
I already right some MapRed programs using the cassandra 1.0.9, but now I'm
trying with an old version with a patch that supports trigger. (this one:
https://issues.apache.org/jira/browse/CASSANDRA-1311)
When I
I'm trying to retrieve old data version for some row but it seems not
be possible. I'm a beginner with Cassandra and the unique aproach I
know is looking to the SSTable in the storage folder, but if I insert
some column and right after insert another value to the same row,
after flushing, I only g
andra
API for this purpose.
Thanks averybody in advance.
Regards,
Felipe Mathias Schmidt
(Computer Science UFRGS, RS, Brazil)
2012/5/14 zhangcheng2 :
> After compaciton, the old version data will gone!
>
>
> zhangcheng2
>
> From: Felipe Schmidt
&
tiple versions of the same column from multiple
> files into a single version in a single file .
>
> Hope that helps.
>
>
> -
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 14/05/2012, at 9:50 PM, Felipe Schmi
Doe's Cassandra support data versioning?
I'm trying to find it in many places but I'm not quite sure about it.
Regards,
Felipe Mathias Schmidt
(Computer Science UFRGS, RS, Brazil)
then you should think about changing your keying to
> perhaps be a composite key where key is of form
>
> NaturalKey/VersionId
>
> Or if you want the versioning at the column level, use composite columns
> with ColumnName/VersionId format
>
>
>
>
> On 05/16/20
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 24/05/2012, at 9:42 PM, Felipe Schmidt wrote:
>
> Ok... it's really strange to me that Cassandra doesn't support data
> versioning cause all of other key-value datab
gt; Cheers
>
>
> -
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 30/05/2012, at 9:53 PM, Felipe Schmidt wrote:
>
> I have further questions:
> -Is there any other way to stract the contect of SSTable, wri
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