Hi,
I just wanted to know if there is any kind of versioning system in
cassandra while indexing new data(like the one we have for ElasticSearch,
for example).
For example, I have a series of payloads each coming with an id and
'updatedAt' timestamp. I just want to maintain the latest state of any
The original dynamic column idea in Google BigTable paper is a mapping of:
(row key, raw bytes) -> raw bytes
The restriction imposed by CQL is, as far as I understand, you need to have a
type for each column.
If the value types involved in the schema is limited, e.g. text or int or
timesta
the thing is, CQL only handles some types of dynamic column use cases.
There's plenty of examples on datastax.com that shows how to do CQL style
dynamic columns.
based on what was described by Chetan, I don't feel CQL3 is a perfect fit
for what he wants to do. To use CQL3, he'd have to change his
I approximate dynamic columns by data_key and data_value columns.
Is there a better way to get dynamic columns in CQL 3?
At 2015-01-21 09:41:02, "Peter Lin" wrote:
I think that table example misses the point of chetan's functional requirement.
he actually needs dynamic columns.
On Tue, Jan
I think that table example misses the point of chetan's functional
requirement. he actually needs dynamic columns.
On Tue, Jan 20, 2015 at 8:12 PM, Xu Zhongxing wrote:
> Maybe this is the closest thing to "dynamic columns" in CQL 3.
>
> create table reivew (
> product_id bigint,
> create
Maybe this is the closest thing to "dynamic columns" in CQL 3.
create table reivew (
product_id bigint,
created_at timestamp,
data_key text,
data_tvalue text,
data_ivalue int,
primary key ((priduct_id, created_at), data_key)
);
data_tvalue and data_ivalue is optional.
On Sat, Jan 17, 2015 at 3:32 PM, Vasileios Vlachos <
vasileiosvlac...@gmail.com> wrote:
> Is there any other occasion that hints are stored and then being sent in a
> cluster, other than network or other temporary or permanent failure? Could
> it be that the client responsible for establishing a c
@Rob - he's probably referring to the thread titled "Reasons for nodes not
compacting?" where Tyler speculates that the tables are falling below the
cold read threshold for compaction. He speculated it may be a bug. At the
same time in a different thread, Roland had a similar problem, and Tyler's
On Sun, Jan 18, 2015 at 8:55 PM, Jason Wee wrote:
> two nodes running cassandra 2.1.2 and one running cassandra 2.1.1
>
For the record, this is an unsupported persistent configuration. You are
only supposed to have split minor versions during an upgrade.
I have no idea if it is causing the prob
On Sun, Jan 18, 2015 at 6:06 PM, Flavien Charlon
wrote:
> It's set on all the tables, as I'm using the default for all the tables.
> But for that particular table there are 41 SSTables between 60MB and 85MB,
> it should only take 4 for the compaction to kick in.
>
What version of Cassandra are y
On Sun, Jan 18, 2015 at 8:50 PM, Kevin Burton wrote:
> Ah.. six replicas. At least its super inexpensive that way (sarcasm!)
>
People with larger numbers of data centers do tend to reduce their
replication factor per DC. It's all about how much consistency you want to
risk, rebuild over the
WAN
On Mon, Jan 19, 2015 at 5:44 PM, Flavien Charlon
wrote:
> Thanks Andi. The reason I was asking is that even though my nodes have
> been 100% available and no write has been rejected, when running an
> incremental repair, the logs still indicate that some ranges are out of
> sync (which then resul
On Mon, Jan 19, 2015 at 11:57 PM, nitin padalia
wrote:
> If I've enable row cache for some column family, when I request some
> row which is not from the begining of the partition, then cassandra
> doesn't populate, row cache.
>
> Why it is so? For older version I think it was because we're sayin
Hi,
Adding to previous mail. For example: We have a column family named review
(with some arbitrary data in map).
CREATE TABLE review(
product_id bigint,
created_at timestamp,
data_int map,
data_text map,
PRIMARY KEY (product_id, created_at)
);
Assume that these 2 maps I use to store arbitrary d
Hi,
Most of the time I will be querying on product_id and created_at, but for
analytic I need to query almost on all column.
Multiple collections ideas is good but the only is cassandra reads a
collection entirely, what if I need a slice of it, I mean
columns for certain keys which is possible wi
Hi,
Datastax comes with sstablekeys that does that. You could also use sstable2json
script to find keys.
Cheers,
Jens
On Tue, Jan 20, 2015 at 2:53 PM, Edson Marquezani Filho
wrote:
> Hello, everybody.
> Does anyone know a way to list, for an arbitrary column family, all
> the rows owned (incl
Hello,
There are probably lots of options to this challenge. The more details
around your use case that you can provide, the easier it will be for this
group to offer advice.
A few follow-up questions:
- How will you query this data?
- Do your queries require filtering on specific columns ot
Hi,
I am creating a review system. for instance lets assume following are the
attibutes of system:
Review{
id bigint,
product_id bigint,
created_at timestamp,
summary text,
description text,
pros set,
cons set,
feature_rating map
etc
}
I created partition key as product_id (so that all the re
Could you please explain how we can achieve dynamic column behavior by
clustering columns.
On Wed, Jan 21, 2015 at 12:10 AM, chetan verma
wrote:
> Hi,
>
> I am creating a review system. for instance lets assume following are the
> attibutes of system:
>
> Review{
> id bigint,
> product_id bigint
The Cassandra team is pleased to announce the release of Apache Cassandra
version 2.0.12.
Apache Cassandra is a fully distributed database. It is the right choice
when you need scalability and high availability without compromising
performance.
http://cassandra.apache.org/
Downloads of source a
Hello,
Have you looked at solving this challenge with clustering columns? Also,
please describe the problem set details for more specific advice from this
group.
Starting new projects on Thrift isn't the recommended approach.
Jonathan
[image: datastax_logo.png]
Jonathan Lacefield
Solutio
Hi,
I am starting a new project with cassandra as database.
I have unstructured data so I need dynamic columns,
though in CQL3 we can achive this via Collections but there are some
downsides to it.
1. Collections are used to store small amount of data.
2. The maximum size of an item in a collectio
Hello, everybody.
Does anyone know a way to list, for an arbitrary column family, all
the rows owned (including replicas) by a given node and the data size
(real size or disk occupation) of each one of them on that node?
I would like to do that because I have data on one of my nodes growing
faste
hi
Could someone please shed some light on which is an efficient way to
retrieve data from cassandra- Using a Range Slice Query(I'm Using Hector)
or filtering using secondary indexes?
best
Parth
Hi,
If I've enable row cache for some column family, when I request some
row which is not from the begining of the partition, then cassandra
doesn't populate, row cache.
Why it is so? For older version I think it was because we're saying
the its caching complete merged partition so, incomplete pa
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