How kind of client are you using in YCSB? If you want to improve latency,
try distributing the requests among nodes instead of stressing a single
node, try host connection pooling instead of creating connection for each
request. Check high level clients like hector or asyantax for use if you
are no
I have a question about efficiency of updates to a CF with composite key.
Let say I have 100 of logical rows to update, and they all belong to the same
physical wide row. In my naïve understanding (correct me if I am wrong), in
order to update a logical row, Cassandra has to retrieve the whole p
On 2012.07.18. 7:13, Code Box wrote:
The cassandra stress tool gives me values around 2.5 milli seconds for
writing. The problem with the Cassandra Stress Tool is that it just
gives the average latency numbers and the average latency numbers that
i am getting are comparable in some cases. It is
Cassandra doesn't do reads before writes. It just places the updates in
memtables. In effect updates are the same as inserts.Batches certainly help
with network latency, and some minor amount of code repetitiion on the server
side. - Original Message -From: "Leonid Ilyevsky"
>;lilyev.
Hi,
I don't think that composite columns have "parent columns". your point
might be true for supercolumns ..
but each composite column is probably independent..
On Wed, Jul 18, 2012 at 9:14 PM, Thomas Van de Velde
wrote:
> Hi there,
>
> I am trying to understand the expiration behavior of compos
I answered my own question with a test:
Using default limit of 100
---
RowKey: test
=> (column=89b81b00-d0f3-11e1-8d4c-000c29d2a972:A, value=,
timestamp=1342628020428000, ttl=10)
=> (column=89b81b00-d0f3-11e1-8d4c-000c29d2a972:B, value=,
timestamp=1342628020428000, ttl=30)
1 Row
Hi folks,
I have an interesting problem in Cassandra 1.1.2, a Google Search
wasn't much help, so I thought I'd ask here.
Essentially, I have a "problem keyspace" in my 2-node cluster that
keeps me from changing the replication factor on a specific keyspace.
It's probably easier to show what I'm s
This is just an FYI.
I experimented w/ Spring Data JPA w/ Cassandra leveraging Kundera.
It sort of worked:
https://github.com/boneill42/spring-data-jpa-cassandra
http://brianoneill.blogspot.com/2012/07/spring-data-w-cassandra-using-jpa.html
I'm now working on a pure Spring Data adapter using Ast
Hi Brian
This is basically a wonderful news for me, because we are using lots of
spring support in the project. Good luck and keep post.
Cheers
/Roshan.
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/An-experiment-using-Spring-Data-w-Cassandra
Good evening,
I am interested in improving the startup time of our cassandra cluster.
We have a 3 node cluster (replication factor of 3) in which our application
requires quorum reads and writes to function.
Each machine is well specced with 24gig of ram, 10 cores, jna enabled etc.
On each serv
Thanks. Team is working on to extend support for
SimpleJPARepository(including implementation for ManagedType).
-Vivek
On Thu, Jul 19, 2012 at 9:06 AM, Roshan wrote:
> Hi Brian
>
> This is basically a wonderful news for me, because we are using lots of
> spring support in the project. Good luck
Hi again,
we have now moved all nodes to correct position in ring, but we can see
higher load on 2 nodes, than on other nodes:
...
node01-05 rack1 Up Normal 244.65 GB 6,67%
102084710076281539039012382229530463432
node02-13 rack2 Up Normal 240.26 GB 6,67%
107756082858297180096735292
Hi,
I know that RandomPartitioner does MD5 of a key and the MD5 is then
used for key distribution AND key ordering. I was just wondering if
it's possible to have RandomPartitioner just for key distribution and
OrderedPartitioner just for per-node key ordering. That would solve
the often requested
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