HI Aaron,
Thanks for your replay.
I've already saw that, but at the moment I'm interesting in installing
Cassandra from scratch - I want to learn.
well, yesterday I've installed 1 node - now I'm looking on how to add more
nodes and read more about Cassandra's tools (node reaper etc.)
Thanks!
On
Can you please gimme an example on this using hector client
On Thu, Aug 4, 2011 at 7:18 AM, Boris Yen yulin...@gmail.com wrote:
It seems to me that your column name consists of two components. If you
have the luxury to upgrade your cassandra to 0.8.1+, I think you can think
about using the
Hi All,
In a conceptual point of view, I'm wondering what is the pros cons,
mainly in term of access efficiency, of both approach :
- Grouping row keys together to reduce the number of keys, but having
wider rows (with more columns)
- One object in one row
Let's illustrate with an example :
I
I have tried the nodetool move but get the following error
node3:~# nodetool -h node3 move 0
Exception in thread main java.lang.IllegalStateException: replication
factor (3) exceeds number of endpoints (2)
at
also nothing happens about the streaming:
nodetool -h node3 netstats
Mode: Normal
Not sending any streams.
Nothing streaming from /10.28.53.11
Pool NameActive Pending Completed
Commandsn/a 0 165086750
Responses
https://github.com/edanuff/CassandraIndexedCollections
2011/8/4 CASSANDRA learner cassandralear...@gmail.com:
Can you please gimme an example on this using hector client
On Thu, Aug 4, 2011 at 7:18 AM, Boris Yen yulin...@gmail.com wrote:
It seems to me that your column name consists of two
Assume you have a column family named testCF with comparator *
CompositeType*(AsciiType, IntegerType(reversed=true), IntegerType); and a
few columns have been inserted into record key a.
Composite start = new Composite() ;
Composite end = new Composite() ;
Looking forward to it. ^^
On Thu, Aug 4, 2011 at 1:56 PM, Eldad Yamin elda...@gmail.com wrote:
Great! I hope it will be open soon!
On Wed, Aug 3, 2011 at 10:33 PM, Ed Anuff e...@anuff.com wrote:
Awesome, great news!
On Wed, Aug 3, 2011 at 11:53 AM, Lynn Bender line...@gmail.com wrote:
I am getting the same problem (Broken Pipe) on a loader program, after
about 8 million read, write pairs. I am pushing serialized objects into
a column with the program, the object it seems to be doing it on is much
larger than the prior objects, so I am wondering if it is possibly a
column size
Hello Sylvain,
thank you very much for your kind help.
Thanks
Jens
2011/8/3 Sylvain Lebresne sylv...@datastax.com
This is a known bug:
https://issues.apache.org/jira/browse/CASSANDRA-2867
(note that the issue title is not exact, in that this is not a problem with
an
upgrade from 0.7 to
I have had similar issues when I generated Cassandra for Erlang. It seems that
Thrift 0.6.1 (the latest stable version) does not work with Cassandra. Using
Thrift 0.7 does.
I had issues where it would give me run time errors when trying to send an
insert (it would not serialize correctly).
- Original Message -
From: Konstantin Naryshkin konstant...@a-bb.net
To: user@cassandra.apache.org
Cc:
Sent: Thursday, August 4, 2011 10:36 AM
Subject: Re: Problems using Thrift API in C
I have had similar issues when I generated Cassandra for Erlang. It seems
that
Thrift
On Wed, 2011-08-03 at 17:22 +0200, Jens Hartung wrote:
Odd, when you generally escape special chars with an backslash.
Not in SQL (which CQL is patterned after). SQL escapes single quotes
using an additional quote character.
--
Eric Evans
eev...@rackspace.com
Hi Todd,
The Lucene secondary index will support sorting fairly easily (eg, out of
the box). See: CASSANDRA-2915
Jason
On Tue, Aug 2, 2011 at 8:26 PM, Todd Nine t...@spidertracks.com wrote:
**
Hi guys,
Now that dynamic composite have been introduced as part of cassandra
core, has any
hi, any help? thanks!
On Thu, Aug 4, 2011 at 5:02 AM, Yan Chunlu springri...@gmail.com wrote:
forgot to mention I am using cassandra 0.7.4
On Thu, Aug 4, 2011 at 5:00 PM, Yan Chunlu springri...@gmail.com wrote:
also nothing happens about the streaming:
nodetool -h node3 netstats
Mode:
Not yet. https://issues.apache.org/jira/browse/CASSANDRA-2405
On Thu, Aug 4, 2011 at 4:44 AM, Bart Swedrowski b...@timedout.org wrote:
Hello,
I was going through documentation, however couldn't find anything about
whether Cassandra stores somewhere information about when manual repair
The principle is, keep data you retrieve at the same time, in the same row.
Here the logical unit to query is one user so I don't see any benefit
to forcing them into a single row unnaturally.
On Thu, Aug 4, 2011 at 2:38 AM, Benoit Perroud ben...@noisette.ch wrote:
Hi All,
In a conceptual
Rafael: Try using the latest version of Thrift (0.7) it seems that older
versions cannot talk to Cassandra properly.
- Original Message -
From: Rafael Almeida almeida...@yahoo.com
To: user@cassandra.apache.org
Sent: Thursday, August 4, 2011 1:53:20 PM
Subject: Re: Problems using Thrift
2011/8/3 Patricio Echagüe patric...@gmail.com
On Wed, Aug 3, 2011 at 4:00 PM, Philippe watche...@gmail.com wrote:
Hello,
I have a 3-node, RF=3, cluster configured to write at CL.ALL and read at
CL.ONE. When I take one of the nodes down, writes fail which is what I
expect.
When I run a
If you have RF=3 quorum won't fail with one node down. So R/W quorum will be
consistent in the case of one node down. If two nodes go down at the same
time, then you can get inconsistent data from quorum write/read if the write
fails with TimeOut, the nodes come back up, and then read asks
On Thu, Aug 4, 2011 at 10:25 AM, Jeremiah Jordan
jeremiah.jor...@morningstar.com wrote:
If you have RF=3 quorum won’t fail with one node down. So R/W quorum
will be consistent in the case of one node down. If two nodes go down at
the same time, then you can get inconsistent data from
I'm running my cassandra cluster (one node), it went fine for a while
under heavy load , using 270% CPU etc (this is a multi-core machine).
but after a while, the CPU utilization dropped to 100%, and the
cluster stopped responding to requests.
I did a jstack , and did
ps ax -L -o
never mind, I found it,
I was trying to dump out the entire keyspace of 1mil rows, which is
not that big, but somehow caused the GC to bring down the server
http://stackoverflow.com/questions/3895940/what-does-java-vm-thread-do
On Thu, Aug 4, 2011 at 1:02 PM, Yang tedd...@gmail.com wrote:
Thanks for your advise. Make sense.
And without sticking to my dummy example, conceptually, what has a
smaller memory footprint : 1M rows of 1 column or 1 row with 1M columns ?
And if the row key and column name are known, is there any performance
difference between both scenarios ?
Thanks
our keyspace is really not that big,
about 1million rows, each about 500 bytes
but doing a get_range_slices() on the entire key range gives OOM
errors (I bumped up the -Xmx arg now, still trying, but
giving such a large chunk of data in one RPC call is still bad), so
that leaves me the option to
You should be able to specify the count parameter to your KeyRange and just use
the last key returned as your start_key for the next page.
Sent from my iPhone
On Aug 4, 2011, at 5:00 PM, Yang tedd...@gmail.com wrote:
our keyspace is really not that big,
about 1million rows, each about
That's simple, set your log level to INFO in log4j-server.properties and then
do the following:
Start of every repair:
grep 'Waiting for repair requests:' system.log
End of every repair:
grep 'No neighbors to repair with' system.log
If you perform individual repairs for each keyspace/column
ah got it , thanks!
On Thu, Aug 4, 2011 at 2:59 PM, Robert Jackson
robe...@promedicalinc.com wrote:
You should be able to specify the count parameter to your KeyRange and just
use the last key returned as your start_key for the next page.
Sent from my iPhone
On Aug 4, 2011, at 5:00 PM,
The error log will contain a call stack, we need that.
e.g.
Failed with exception java.io.IOException:java.lang.NullPointerException
ERROR 15:22:33,528 Failed with exception
java.io.IOException:java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
at
Hi,
The following command line triggers a garbage collection via JMX:
echo 'run -b java.lang:type=Memory gc' | java -jar jmxterm-1.0-alpha-4-uber.jar
-l service:jmx:rmi:///jndi/rmi://hostname:8080/jmxrmi -n
It uses:
http://wiki.cyclopsgroup.org/jmxterm
The GC is necessary after a major
A write for a single row is atomic, including writing to multiple CF's in with
the same row key. http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic
They are not isolated though, reads may see the write partially applied.
Have a look at the data modelling slides here
It's probably a network thing.
The only thing I can think of in cassandra is thrift_max_message_length_in_mb
in the config. That config setting will result in a TException thrown on the
server side (i think), not sure if that makes the server kill the socket. I
would hope the error returns to
Cassandra 0.8 uses Thrift 0.6+
If you are having problems using thrift 0.6 send over the error.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 5 Aug 2011, at 03:08, Konstantin Naryshkin wrote:
Rafael: Try using the latest
There seems to be no stack trace on this message
Error: Exception thrown by the agent : java.net.MalformedURLException: Local
host name unknown: java.net.UnknownHostException: ip-10-0-1-10: ip-10-0-1-10
I am also on sure why cassandra is doing a getLocalHost when I tried to bind
everything to
Technically, by the VM spec, you can never *force* a java VM to garbage
collect. You can request, but thats it.
Rather then open that whole debate again if anyone doubts this, i suggets
they look back in the archives.
JK
On Thu, Aug 4, 2011 at 6:35 PM, Teijo Holzer thol...@wetafx.co.nz
Sure, I can find the stack trace for some exceptions:
ERROR [pool-2-thread-132] 2011-07-23 13:29:04,869 Cassandra.java (line 3210)
Internal error processing get_range_slices
java.lang.NullPointerException
at org.apache.cassandra.db.ColumnFamily.diff(ColumnFamily.java:298)
at
I ran my cassandra cluster on one node, inserted about 50 rows,
each about 400 bytes, then the heap went up to 800MB, and constantly
goes into full GC. I guessed that the memtable was probably taking a
lot of space, so I did a node tool flush, so that
all memtable are changed to 0. after this,
If you didn't GC post-flush then it's just leftovers.
An empty Cassandra (nothing in memtables or cache) will use 5-10MB of heap.
On Thu, Aug 4, 2011 at 9:38 PM, Yang tedd...@gmail.com wrote:
I ran my cassandra cluster on one node, inserted about 50 rows,
each about 400 bytes, then the
Thanks Jonathan
On Thu, Aug 4, 2011 at 7:44 PM, Jonathan Ellis jbel...@gmail.com wrote:
If you didn't GC post-flush then it's just leftovers.
An empty Cassandra (nothing in memtables or cache) will use 5-10MB of heap.
On Thu, Aug 4, 2011 at 9:38 PM, Yang tedd...@gmail.com wrote:
I ran
I have 3 nodes and the RF used to be 2, after awhile I have changed it
to 3; using Cassandra 0.7.4
I have tried the nodetool move but get the following error
node3:~# nodetool -h node3 move 0
Exception in thread main java.lang.IllegalStateException:
replication factor (3) exceeds number of
Check things like netstats, disk space etc to see why it's in Leaving state.
Anything in the logs that shows Leaving?
--
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