you might want to read here
http://wiki.apache.org/cassandra/CassandraLimitations
jason
On Fri, Feb 27, 2015 at 2:44 PM, wateray wrote:
> Hi all,
> My team is using Cassandra as our database. We have one question as below.
> As we know, the row with the some partition key will be stored in the
Also, note that repairs will be slower for larger rows and AFAIK also
require slightly more memory. Also, to avoid many tombstones it could be
worth to consider bucketing your partitions by time.
Cheers,
Jens
On Fri, Feb 27, 2015 at 7:44 AM, wateray wrote:
> Hi all,
> My team is using Cassandra
> When one partition's data is extreme large, the write/read will slow?
This is actually a good question, If a partition has near 2 billion rows, will
writes or reads get too slow? My understanding is it shouldn't, as data is
indexed inside a partition and when you read or write you are doing a
I want to make unique constraint in cassandra . As i want that all the
value in my column be unique in my column family ex: name-rahul phone-123
address-abc
now i want that in this row no values equal to rahul ,123 and abc get
inserted again on searching on datastax i found that i can achieve it b
As a general, rough guideline, I would suggest that a partition be kept
down to thousands or tens of thousands of rows, probably not more than 100K
rows per partition, and physical size kept to tens of thousands to hundreds
of thousands or maybe a few megabytes or ten megabytes maximum per
partitio
Hi,
I am new to Cassandra and trying to setup a Cassandra 2.0 cluster using 4
nodes, 2 each in 2 different racks. All are in same data centre. This is what I
see in the documentation:
To use racks correctly:
Use the same number of nodes in each rack. Use one rack and place the nodes in
differ
In C* 2.1.2, is there a way you can delete without specifying the row key?
create table (
guid text,
key1 text,
key2 text,
data int
primary key (guid, key1, key2)
);
delete from a_table where key1='' and key2='';
I'm trying to avoid doing like this:
* query the table to get guids (32 b
Hi,
We are building REST APIs for Cassandra using the Cassandra Java Driver.
So as per the below guidlines from the documentation, we are caching the
Cluster instance (per cluster) and the Session instance (per keyspace) as
they are multi thread safe.
http://www.datastax.com/documentation/develop
On Fri, Feb 27, 2015 at 7:30 AM, Amlan Roy wrote:
> I am new to Cassandra and trying to setup a Cassandra 2.0 cluster using 4
> nodes, 2 each in 2 different racks. All are in same data centre. This is
> what I see in the documentation:
>
> To use racks correctly:
> Use the same number of nodes in
Hi all,
We have a table in Cassandra where we frequently overwrite recent inserts.
Compaction does a fine job with this but ultimately larger memtables would
reduce compactions.
The question is: can we make Cassandra use larger memtables and flush less
frequently? What currently triggers the flus
On Fri, Feb 27, 2015 at 2:01 PM, Dan Kinder wrote:
> Theoretically sstable_size_in_mb could be causing it to flush (it's at the
> default 160MB)... though we are flushing well before we hit 160MB. I have
> not tried changing this but we don't necessarily want all the sstables to
> be large anyway
Hello,
I have a cluster of four nodes running 2.0.12. I added one more node and
then went on with the cleanup procedure on the other four nodes, but I get
this error (the same error on each node):
INFO [CompactionExecutor:10] 2015-02-28 01:55:15,097
CompactionManager.java (line 619) Cleaned up t
I have a Cassandra table like this -
create table user_record (user_id text, record_name text, record_value
blob, primary key (user_id, record_name));
What is the best way to extract all the user_id from this table? As of now,
I cannot change my data model to do this exercise so I need to fin
I want to make unique constraint in Cassandra . As i want that all the
value in my column be unique in my column family
example : name-rahul ,phone-123, address-abc
now i want that in this row no values equal to rahul ,123 and abc get
inserted again on searching on datastax i found that i can ac
We had the exact same problem, and found this bug:
https://issues.apache.org/jira/browse/CASSANDRA-8716. It's fixed in 2.0.13
(unreleased), but we haven't found a workaround for the interim. Please
share if you find one!
Thanks,
Jeff
On Fri, Feb 27, 2015 at 6:01 PM, Gianluca Borello
wrote:
>
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