I don't use php so I don't know the method but
http://wiki.apache.org/cassandra/API
"get
ColumnOrSuperColumn get(string keyspace, string key, ColumnPath column_path,
ConsistencyLevel consistency_level)
Get the Column or SuperColumn at the given column_path. If no value is present,
NotFoundExcep
On 8/12/10 10:20 PM, Mark wrote:
On 8/12/10 9:14 PM, Jonathan Ellis wrote:
Works fine here.
bin/cassandra-cli --host localhost --port 9160
Connected to: "Test Cluster" on localhost/9160
Welcome to cassandra CLI.
On Thu, Aug 12, 2010 at 2:18 PM, Mark wrote:
On 8/12/10 8:29 AM, Mark wrote:
On
On 8/12/10 9:14 PM, Jonathan Ellis wrote:
Works fine here.
bin/cassandra-cli --host localhost --port 9160
Connected to: "Test Cluster" on localhost/9160
Welcome to cassandra CLI.
On Thu, Aug 12, 2010 at 2:18 PM, Mark wrote:
On 8/12/10 8:29 AM, Mark wrote:
On 8/11/10 10:11 PM, Jonat
Works fine here.
bin/cassandra-cli --host localhost --port 9160
Connected to: "Test Cluster" on localhost/9160
Welcome to cassandra CLI.
On Thu, Aug 12, 2010 at 2:18 PM, Mark wrote:
> On 8/12/10 8:29 AM, Mark wrote:
>>
>> On 8/11/10 10:11 PM, Jonathan Ellis wrote:
>>>
>>> you have to use an up t
Right, row stats in 0.6 are just "what I've seen during the
compactions that happened to run since this node restarted last."
0.7 has persistent (and more fine-grained) statistics.
On Thu, Aug 12, 2010 at 1:28 PM, Ryan King wrote:
> On Thu, Aug 12, 2010 at 9:08 AM, Julie wrote:
>> I am chasing
I'm also seeing an issue with not being able to iterate over all keys in
Cassandra 0.6.4. In my unit test I create 20 keys (0-19) and iterate with a
batch size of 6. This is what I get.
Cassandra 0.6.4
start key: ""
9, 14, 4, 15, 11, 18
start key: 18
18, 7, 17, 7, 17
start key:17
17
On 8/12/10 8:29 AM, Mark wrote:
On 8/11/10 10:11 PM, Jonathan Ellis wrote:
you have to use an up to date CLI, the old one used broken options w/
its framed mode
On Wed, Aug 11, 2010 at 6:39 PM, Mark wrote:
"org.apache.thrift.protocol.TProtocolException: Missing version in
readMessageBegin, ol
Try setting the end key to an empty string, and then set the number of rows to something sane and make multiple calls if needed. Or you may be able to make your own secondary index another CF, so you do two reads: one on the secondary index then one of the rows you want.There has been some discussi
On Thu, Aug 12, 2010 at 9:08 AM, Julie wrote:
> I am chasing down a row size discrepancy and am confused.
>
> I populated a single node Cassandra cluster with 10,000 rows of data, using
> numeric keys 1-10,000, where each row is a little over 100kB in length and has
> a single column in it.
>
> Wh
On Thu, Aug 12, 2010 at 8:30 AM, Stefan Kaufmann wrote:
> Hello again,
>
> last day's I started several tests with Cassandra and learned quite some
> facts.
>
> However, of course, there are still enough things I need to
> understand. One thing is, how the data replication works.
> For my Testing
> Actually we use Cassandra on ZFS (OpenSolaris) - fine tuned for our need. no
> Raidcontroller used.
An interesting property of ZFS is the use of the ARC for caching.
Contrary to the traditional behavior of buffer caches, the ARC should
theoretically not evict all interesting data as a result of
On Thu, 2010-08-12 at 11:29 +0200, Mikio Braun wrote:
> So far, we're very pleased with Cassandra performance, but we've also
> had to overcome some issues on which I report in the blog and which
> are hopefully interesting for other users of Cassandra.
>
> The blog post can be found here:
>
> ht
I am chasing down a row size discrepancy and am confused.
I populated a single node Cassandra cluster with 10,000 rows of data, using
numeric keys 1-10,000, where each row is a little over 100kB in length and has
a single column in it.
When I perform a cfstats on the node immediately after wri
Hello again,
last day's I started several tests with Cassandra and learned quite some facts.
However, of course, there are still enough things I need to
understand. One thing is, how the data replication works.
For my Testing:
1. I set the replication Factor to 3, started with 1 active node (the
On 8/11/10 10:11 PM, Jonathan Ellis wrote:
you have to use an up to date CLI, the old one used broken options w/
its framed mode
On Wed, Aug 11, 2010 at 6:39 PM, Mark wrote:
"org.apache.thrift.protocol.TProtocolException: Missing version in
readMessageBegin, old client?"
Is the CLI not su
Hi all,
I've got cassandra superlcolumn looking like that:
now in this columnfamily I've inserted something like that:
["client"] => array(1) {
["2a3909c0-a612-11df-b27e-346336336631"]=>
array(3) {
["add_date"]=>
string(10) "1281618279"
["lastname"]=>
string(8) "
You should take a look at http://wiki.apache.org/cassandra/LiveSchemaUpdates
loadSchemaFromYaml() is intended to initialize the schema on a seed
node in a new cluster (or one that has been upgraded from 0.6). It is
an operation that should only be performed one time *per cluster.*
Gary
On Wed,
Hi out there ...
Without starting an OT Thread or an Evangelists war it would be interesting
what filesystems most cassandra installation uses, which performs best in
which cases
Actually we use Cassandra on ZFS (OpenSolaris) - fine tuned for our need. no
Raidcontroller used.
What are the expe
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hello,
I've put a blog post where I discuss our experiences with using
Cassandra as the main database backend for twimpact. Twimpact is
research project at the TU Berlin which aims at estimating user impact
based on retweet analysis. A live version of
I have a key range that between 00 and 001000, and my code as
below:
SlicePredicate predicate = new SlicePredicate();
predicate.setColumn_names(columns);
ColumnParent parent = new ColumnParent(columnFamily);
KeyRange k = new KeyRange(1000);
k.setStart_key(key[0]);
k.setEnd_key(key[1000
Hi all,
Can I retrieve specific key range from a table in RandomPartitioner?
Because I always got below exception:
Exception in thread "main" InvalidRequestException(why:start key's md5 sorts
after end key's md5. this is not allowed; you probably should not specify
end key at all, under Random
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