Hi all,
I run a benchmark with my own code and found that the 10 inserts
performance is better than others, Why?
Can anyone explain it?
Thanks.
Partitioner = OPP
CL = ONE
==
1000 records
insert one:201 ms
insert per:0.201 ms
insert
Sorry, my Cassandra version is 0.6.4.
test
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
[1000]);
ListKeySlice results = client.get_range_slices(keyspace, parent,
predicate, k, ConsistencyLevel.ONE);
On Thu, Aug 12, 2010 at 4:44 PM, ChingShen chingshenc...@gmail.com wrote:
Hi all,
Can I retrieve specific key range from a table in RandomPartitioner?
Because I always got below
Why? What reasons did you choose TCP?
Shen
On Sat, Mar 6, 2010 at 9:15 AM, Jonathan Ellis jbel...@gmail.com wrote:
In 0.6 gossip is over TCP.
On Fri, Mar 5, 2010 at 6:54 PM, Ashwin Jayaprakash
ashwin.jayaprak...@gmail.com wrote:
Hey guys! I have a simple question. I'm a casual observer,
Thanks Jonathan Ellis,
I got an error message as below:
ERROR [pool-1-thread-1] 2010-07-21 08:51:46,582 Cassandra.java (line 1242)
Internal error processing get_slice
java.lang.RuntimeException:* No replica strategy configured for system*
Because the system keyspace is for Cassandra internals,
cassandra get system.LocationInfo['L']
Exception Internal error processing get_slice
What's wrong?
Thanks.
Shen
Hi all,
Does it mean that the coordinator node always return success to the client
at CL.ZERO? But if the coordinator node sends a request to a given node
B(RF=1), then B is down, what happened? The coordinator node will write the
hint locally?
Thanks.
Shen
Which client library do you use?
Shen
On Fri, Jul 9, 2010 at 4:53 PM, Per Olesen p...@trifork.com wrote:
Hi,
I am a bit confused about getting an UnavailableException when doing a
QUORUM write.
I have a 3 node cluster, with RF=3. When all 3 nodes are up, the QUORUM
write succeeds. When 1
Hi all,
If I want to add a new Keyspace, does it mean I have to distribute my
storage-conf.xml to whole nodes? and restart whole nodes?
Shen
Hi all,
Please consider this case: (RF=1, CL=ONE)
1. I have A, B and C nodes.
2. A node is a coordinator node, it sends a request to B node to do write
operation.
3. B node is down during write operation, so return failure message to
client, and write a hint to C node.
4. B node comes
Hi,
I found the http://www.slideshare.net/adorepump/cassandra-nosql ppt, that
mentioned State disseminated in* O(logN)* rounds where N is the number of
nodes in the cluster. about gossip on page 11. Is it wrong to draw on page
15? does it need round 4?
Thanks.
Shen
So, am I correctly?
Shen
On Thu, Jul 8, 2010 at 5:33 PM, Anty anty@gmail.com wrote:
Sorry I am wrong .Miss the CF=one.
On Thu, Jul 8, 2010 at 5:27 PM, Anty anty@gmail.com wrote:
On Thu, Jul 8, 2010 at 4:11 PM, ChingShen chingshenc...@gmail.comwrote:
Hi all,
Please consider
If so, when does hinted handoff work?
On Thu, Jul 8, 2010 at 9:55 PM, Anty anty@gmail.com wrote:
On Thu, Jul 8, 2010 at 4:11 PM, ChingShen chingshenc...@gmail.com wrote:
Hi all,
Please consider this case: (RF=1, CL=ONE)
1. I have A, B and C nodes.
2. A node is a coordinator
, Jonathan Ellis jbel...@gmail.com wrote:
On Thu, Jul 8, 2010 at 12:45 AM, ChingShen chingshenc...@gmail.com
wrote:
hmm... I'm really confused.
The http://wiki.apache.org/cassandra/API document mentioned that if
write
ConsistencyLevel=ANY that Ensure the write has been written to at least
1
Hi,
Why is cassandra named cassandra?
Thanks.
Shen
On Fri, Jul 9, 2010 at 4:32 AM, Jonathan Ellis jbel...@gmail.com wrote:
If the coordinator knows it can't achieve the requested CL it won't do
any writes, hinted or otherwise, and will immediately report
UnavailableException to the client.
To summarize: hinted writes are only generated when
have multiple nodes try a DNS round robin to distribute client
connections around.
Aaron
On 6 Jul 2010, at 22:10, ChingShen wrote:
Hi all,
I'm newbie in Cassandra, I have a question about which node is
coordinator node in my cluster.
I have A, B, C, D, E, F and G nodes. if I run
Hi all,
I found the Cassandra paper(in 5.7 section) that mentioned all system
control messages rely on UDP, but when I start up my cluster, I haven't see
any informations about UDP. Why?
TCP connections:
port 7000 = Gossip
port 9160 = Thrift service
port 8080 = JMX
Right?
Shen
So, does it mean that only the CL=ZERO and CL=ANY support hinted handoff,
right?
Thanks.
Shen
On Wed, Jul 7, 2010 at 11:28 PM, Jonathan Ellis jbel...@gmail.com wrote:
does http://wiki.apache.org/cassandra/HintedHandoff help?
On Wed, Jul 7, 2010 at 10:16 AM, ChingShen chingshenc...@gmail.com
me a real case?
Thanks.
Shen
On Thu, Jul 8, 2010 at 12:48 PM, Jonathan Ellis jbel...@gmail.com wrote:
No, it means that HH writes don't count towards meeting the requested
ConsistencyLevel.
On Wed, Jul 7, 2010 at 9:36 PM, ChingShen chingshenc...@gmail.com wrote:
So, does it mean that only
Hi all,
I'm newbie in Cassandra, I have a question about which node is coordinator
node in my cluster.
I have A, B, C, D, E, F and G nodes. if I run a write operation on A node,
and key range between A and B, so the A node is responsible to write the key
to B, C and D nodes(RF=3) ? and does it
Hi all,
I have A, B, C, D, E, F and G nodes(RF=3), if I run a write
operation(CL=ALL) on A node(coordinator), and the key range between A and
B, therefore, the data will be stored on B, C and D nodes, right? Second, if
B node is down during the write operation, does it return failure(CL=ALL) to
24 matches
Mail list logo
