Yes a super column can only have columns in it.
Regards,
/VJ
On Wed, Apr 14, 2010 at 10:28 PM, Christian Torres chtor...@gmail.comwrote:
I'm defining a ColumnFamily (Table) type Super, It's posible to have a
SuperColumn inside another SuperColumn or SuperColumns can only have normal
Is there any effort ongoing to make the row key a binary (byte[]) instead of
a string? In the current cassandra.thrift file (0.6.0), I find:
const string VERSION = 2.1.0
[...]
struct KeySlice {
1: required *string* key,
2: required listColumnOrSuperColumn columns,
}
while on the current
When restarting one of the nodes in my cluster I found this error in the
log. What does this mean?
INFO [GC inspection] 2010-04-15 05:03:04,898 GCInspector.java (line 110) GC
for ConcurrentMarkSweep: 712 ms, 11149016 reclaimed leaving 442336680 used;
max is 4432068608
ERROR
Am 14.04.2010 15:22, schrieb Ted Zlatanov:
On Wed, 14 Apr 2010 15:02:29 +0200 Jean-Pierre Bergaminja...@ractive.ch
wrote:
JB The metrics are stored together with a timestamp. The queries we want to
JB perform are:
JB * The last value of a specific metric of a device
JB * The values of a
Ran,
It looks like you're seeing
https://issues.apache.org/jira/browse/CASSANDRA-866. It's fixed in
0.6.1.
Gary
On Thu, Apr 15, 2010 at 04:06, Ran Tavory ran...@gmail.com wrote:
When restarting one of the nodes in my cluster I found this error in the
log. What does this mean?
INFO [GC
Hi , all
How to implement *TOP TEN* in Cassandra,
For example , *Top ten stories in Digg.com*
How to model.
Thanks
I'm using SimpleCassie like cassandra client.
I have a question: can I get all super-columns that there in one
column-family?
If yes, how can i do it?
Regards!
sounds like https://issues.apache.org/jira/browse/THRIFT-347
On Wed, Apr 14, 2010 at 11:58 PM, richard yao richard.yao2...@gmail.com wrote:
I am having a try on cassandra, and I use php to access cassandra by thrift
API.
I got an error like this:
TException: Error: TSocket: timed out
Thank you!
yes, this looks like the same issue, thanks Gary.
Other than seeing the errors in the log I haven't seen any other
irregularities. (maybe there are, but they haven't surfaced). Does this
assertion mean data corruption or something else that's worth waiting to
0.6.1 for?
On Thu, Apr 15, 2010 at
No data corruption. There was a bug in the way that the index was
scanned that was manifesting itself when when the index got bigger
than 2GB.
Gary.
On Thu, Apr 15, 2010 at 08:03, Ran Tavory ran...@gmail.com wrote:
yes, this looks like the same issue, thanks Gary.
Other than seeing the
Looks like the timestamp, in this case, is 0. Does Cassandra allow zero
timestamps? Could be a bug in Cassandra doing an implicit boolean coercion
in a conditional where it shouldn't.
Mike
On Thu, Apr 15, 2010 at 8:39 AM, Lee Parker l...@socialagency.com wrote:
We are currently migrating about
When I am verifying the columns in the mutation map before sending it to
cassandra, none of the timestamps are 0. I have had a difficult time
recreating the error in a controlled environment so I can see the mutation
map that was actually sent.
Lee Parker
l...@spredfast.com
[image: Spredfast]
I'm actually using PHP. I do have several php processes running, but each
one should have it's own Thrift connection.
Lee Parker
l...@spredfast.com
[image: Spredfast]
On Thu, Apr 15, 2010 at 10:53 AM, Jonathan Ellis jbel...@gmail.com wrote:
Looks like you are using C++ and not setting the
Have a look at locator/DatacenterShardStrategy.java.
On Thu, Apr 15, 2010 at 8:16 AM, Ran Tavory ran...@gmail.com wrote:
I'm reading this on this
page http://wiki.apache.org/cassandra/ArchitectureInternals :
AbstractReplicationStrategy controls what nodes get secondary, tertiary,
etc.
Hi all,
We setup two nodes and simply set replication factor=2 for test run.
After both nodes, say, node A and node B, serve several hours, we found that
node A always keep 300% cpu usage.
(the other node is under 100% cpu, which is normal)
thread dump on node A shows that there are 3 busy
From the jconsole, I go under
ColumnFamilyStores-CF1-Column1-Operations and clicked force
flush().
I'm getting a Operation return value null OK message box. what am I
doing wrong?
On Tue, Apr 13, 2010 at 3:12 PM, Jonathan Ellis jbel...@gmail.com wrote:
you have three options
(a) connect
On Tue, Apr 13, 2010 at 3:59 PM, Anthony Molinaro
antho...@alumni.caltech.edu wrote:
I actually got lucky and while it hovered in the 91-95% full, compaction
finished and its now at 60%. However, I still have around a dozen or so
data files. I thought 'nodeprobe compact' did a major
Could you create a ticket for us to return an error message in this
situation?
-Jonathan
On Tue, Apr 13, 2010 at 4:24 PM, Lee Parker l...@socialagency.com wrote:
nevermind. I figured out what the problem was. I was not putting the
column inside a ColumnOrSuperColumn container.
Lee Parker
The entire thing was completely my own fault. I was making an invalid
request and, somewhere in the code, I was catching the exception and not
handling it at all. So it only appeared to be silent when in reality it was
throwing a nice descriptive exception.
Lee Parker
l...@spredfast.com
You're right, to get those numbers on debian something is very wrong.
Have you looked at
http://spyced.blogspot.com/2010/01/linux-performance-basics.html ?
What is the bottleneck on the linux machines?
With the kind of speed you are seeing I wouldn't be surprised if it is swapping.
-Jonathan
Ah, I see. Glad you resolved that. :)
On Thu, Apr 15, 2010 at 12:31 PM, Lee Parker l...@socialagency.com wrote:
The entire thing was completely my own fault. I was making an invalid
request and, somewhere in the code, I was catching the exception and not
handling it at all. So it only
There's a few things it could be:
Out of memory: usually it can log the exception before dying but not
always. there will be a java_$pid.hprof file with the heap dumped.
JVM crash: there will be hs_err$pid.log file
OS bug or hardware problem: sometimes your OS will log something
-Jonathan
On
I upgraded to 0.6 yesterday and it's bang on the same. I'll go read up on
py_stress and give it a try.
On Thu, Apr 15, 2010 at 1:57 PM, Jonathan Ellis jbel...@gmail.com wrote:
What kind of numbers do you get from contrib/py_stress?
(that's located somewhere else in 0.5, but you should really
This is actually fairly similar to how we store metrics at Cloudkick.
Below has a much more in depth explanation of some of that
https://www.cloudkick.com/blog/2010/mar/02/4_months_with_cassandra/
So we store each natural point in the NumericArchive table.
ColumnFamily CompareWith=LongType
FWIW, We just exposed this as an option in hector.
-Nate
On Thu, Apr 15, 2010 at 8:38 AM, Miguel Verde miguelitov...@gmail.com wrote:
On Thu, Apr 15, 2010 at 10:22 AM, Eric Evans eev...@rackspace.com wrote:
But, if you've enabled framing on the server, you will not
be able to use C# clients
Hmmm. Same code runs on ubuntu, and I'm able to flush using the nodetool.
What is the difference between inserting data using :
StorageProxy.mutateBlocking vs. sending oneway message using the
MessagingService?
On Thu, Apr 15, 2010 at 10:14 AM, Jonathan Ellis jbel...@gmail.com wrote:
probably
I have done more error checking and I am relatively certain that I am
sending a valid timestamp to the thrift library. I was testing a switch to
the Framed Transport instead of Buffered Transport and I am getting fewer
errors, but now the cassandra server dies when this happens. It is starting
Has anyone used json2sstable to migrate a large amount of data into
cassandra? What was your methodology? I assume that this will be much
faster than stepping through my data and doing writes via PHP/Thrift.
Lee Parker
It appears that after some testing, the buffered transport seems more
stable. I am occasionally getting a missing timestamp error during
batch_mutate calls. It happens both on framed and buffered transports, but
when it happens on a framed transport, the server crashes. Is this typical?
Lee
Have you tried other client machines?
It sounds like your client is generating garbage, which is Bad.
https://issues.apache.org/jira/browse/THRIFT-601
On Thu, Apr 15, 2010 at 4:20 PM, Lee Parker l...@socialagency.com wrote:
It appears that after some testing, the buffered transport seems more
Need a way to have two different types of indexes.
Key: aTextKey
ColumnName: aTextColumnName:55
Value:
Key: aTextKey
ColumnName: 55:aTextColumnName
Value:
All the valuable information is stored in the column name itself.
Above two can be in different column families...
Queries:
Given a key,
Hi,
I have a cluster running on ec2, and would like to do some ring
management. Specifically, I'd like to replace an existing node
without another node (I want to change the instance type).
I was looking over http://wiki.apache.org/cassandra/Operations
and it seems like I could do something
You'll have to scan the CF. If you're using
OrderPreservingPartitioner please see 'get_range_slices'
(http://wiki.apache.org/cassandra/API). It would help if you had an
idea of where the key might be, so you would know where to start
scanning.
Gary.
On Thu, Apr 15, 2010 at 21:01, Jared Laprise
I tried that and found that it cannot handle large file at present.
But you can write a tool according to it.
eg: first sorting your data file according to it's hash key; second, write
to a SSTable directly
On Fri, Apr 16, 2010 at 4:47 AM, Lee Parker l...@socialagency.com wrote:
Has anyone used
On Thu, Apr 15, 2010 at 3:47 PM, Lee Parker l...@socialagency.com wrote:
Has anyone used json2sstable to migrate a large amount of data into
cassandra? What was your methodology? I assume that this will be much
faster than stepping through my data and doing writes via PHP/Thrift.
If you're
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