birth_year is secondary indexed. When querying using 2nd indexes, Cassandra
(it's not CQL specific) requires that you use an '=' for at least one of
the indexed column in the where clause (in your example you only have one
such column so it should be an '='). This is a limitation of 2ndary indexes
@Bryan
Other space is used but can be more easily controlled by tuning for
- memtable
- compaction
- key cache
- *row cache*
Isn't row cache stored off-heap since a while ?
2013/1/31 Bryan Talbot btal...@aeriagames.com
On Wed, Jan 30, 2013 at 2:44 PM, Guillermo Barbero
On Thu 31 Jan 2013 03:43:32 AM CST, Zhong Li wrote:
Are there tickets/documents explain how data be replicated on Virtual
Nodes? If there are multiple tokens on one physical host, may a chance
two or more tokens chosen by replication strategy located on same
host? If move/remove/add a token
Hi, replies to your answers:
The CFs that seems to flush more often (users and messages) do not
have multiget queries...
There are 4 secondary indexes for users and 3 for messages. I've seen
something odd here: the index of the CFs is also stored in a column
AND is also indexed. There isn't any
Hi Edward,
I've used Hector for years now myself and know how good it is. I think I've
tracked this to a problem in the JDBC driver, I'll post a message and raise a
ticket over there. (there is still a possibility that Cassandra 1.2 is sending
an incorrect CQLresult set)
Andy
On 30 Jan
As you may be aware I've been trying to track down a problem using JDBC 1.1.2
with Cassandra 1.2.0 I was getting a null pointer exception in the result set.
I've done some digging into the JDBC driver and found the following.
In CassandraResultSet.java the new result set is Instantiated in
Thanks Sylvain..
Regards,
Dinusha.
On Thu, Jan 31, 2013 at 2:47 PM, Sylvain Lebresne sylv...@datastax.comwrote:
birth_year is secondary indexed. When querying using 2nd indexes,
Cassandra (it's not CQL specific) requires that you use an '=' for at least
one of the indexed column in the
Hi,
You may take a look to java-driver
https://github.com/datastax/java-driver project. It has an
implementation for connection pool.
Cheers,
Gabi
On 1/31/13 6:48 PM, Vivek Mishra wrote:
Hi,
Any connection pool API available for cassandra transport
Hi,
After messing around with my Cassandra cluster recently, I think I need some
basic understanding on how things work behind scene regarding data streaming.
Let's say we have three node cluster with RF = 3. If node 3 for some reason
dies and I want to replace it with a new node with the same
Hi folks, I'm trying to get a multimode setup working, which seems like it
should be really simple from the documentation.
ERROR 11:41:20,773 Fatal configuration error
org.apache.cassandra.exceptions.ConfigurationException: For input string:
85070591730234615865843651857942052864
at
Now by default a new partitioner is chosen Murmer3. The range of
tokens used to be something like 0 - 2^127. Now the range of its
tokens is -2^64 - 2^64 . You can switch back to random partitioner
and follow the old instructions or try to find a new doc with the new
instructions.
On Thu, Jan 31,
I decided to dig in to the source code, looks like in the case of nodetool
repair, if the current node sees the difference between the remote nodes based
on the merkle tree calculation, it will start a streamrepair session to ask the
remote nodes to stream data between each other.
But I am
On Thu, Jan 31, 2013 at 12:19 PM, Wei Zhu wz1...@yahoo.com wrote:
But I am still not sure how about the my first question regarding the
bootstrap, anyone?
As I understand it, bootstrap occurs from a single replica. Which
replica is chosen is based on some internal estimation of which is
On Thu, Jan 31, 2013 at 12:17 PM, Edward Capriolo edlinuxg...@gmail.com wrote:
Now by default a new partitioner is chosen Murmer3.
Now = as of 1.2, to be unambiguous.
=Rob
--
=Robert Coli
AIMGTALK - rc...@palominodb.com
YAHOO - rcoli.palominob
SKYPE - rcoli_palominodb
This is the bad side of changing default. There are going to be a few
groups unfortunates.
The first group, who only can not setup their cluster, and eventually
figure out their tokens. (this thread)
The second group, who assume their tokens were correct and run around
with an unbalanced cluster
Thanks Rob. I think you are right on it.
Here is what I found:
https://github.com/apache/cassandra/blob/cassandra-1.1.0/src/java/org/apache/cassandra/dht/RangeStreamer.java#L140
It sorts the end point by proximity and in
There are 4 secondary indexes for users and 3 for messages. I've seen
something odd here: the index of the CFs is also stored in a column
AND is also indexed. There isn't any query by that secondary index. I
should probably erase the index, shouldn't I?
What is the cardinality like on these
One more question though,
I tried to replace a node with a new node with the same IP, Here is what we
did:
* drain the node
* check nodetool on other nodes, and this node is marked down (the token for
this node is 100)
* clear the data, commit log, saved cache on the down node.
* change
On Thu, Jan 31, 2013 at 3:31 PM, Wei Zhu wz1...@yahoo.com wrote:
The only reason I can think of is that the new node has the same IP as the
dead node we tried to replace? After reading the bootstrap code, it
shouldn't be the case. Is it a bug? Or anyone tried to replace a dead node
with the
Can you provide the python script that you're using?
(I'm moving this thread to the pycassa mailing list (
pycassa-disc...@googlegroups.com), which is a better place for this
discussion.)
On Thu, Jan 31, 2013 at 6:25 PM, Pradeep Kumar Mantha
pradeep...@gmail.comwrote:
Hi,
I am trying to
Thanks.. Please find the script as attachment.
Just re-iterating.
Its just a simple python script which submit 4 threads.
This script has been scheduled on 8 cores using taskset unix command , thus
running 32 threads/node.
and then scaling to 16 nodes
thanks
pradeep
On Thu, Jan 31, 2013 at 4:38
Out of interest do you have the ticket?
A
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 31/01/2013, at 3:19 AM, Edward Capriolo edlinuxg...@gmail.com wrote:
Fix is simply to switch to random partitioner.
On Wednesday,
So basically it's merging the results 2 separate queries: Indexed scan
(token-range) intersect foo.flag_index=true
NO.
It is doing one query, one the secondary index. When it reads the row keys in
that index is discards any outside of the token range,
That query is sent to nodes which
Check the JMX port listed in /etc/cassandra/cassandra-env.sh
If it's not default you can pass it to nodetool using the --jmx-port option.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 31/01/2013, at 3:52 AM,
+1
Also where can I learn more about pyhtondra ?
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 31/01/2013, at 8:09 AM, Rob Coli rc...@palominodb.com wrote:
On Wed, Jan 30, 2013 at 7:21 AM, Edward Capriolo
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