Yes, for ALL, it is not good for HA, and because we meet problem when use
QUORAM, and current solution is switch Write:QUORAM / Read:QUORAM when got
UnavailableException exception.
2012/7/18 Jay Parashar jparas...@itscape.com
Thanks..but write ALL will fail for any downed nodes. I am thinking
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
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
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
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: quot;Leonid Ilyevskyquot;
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
thomase...@gmail.com wrote:
Hi there,
I am trying to understand the expiration
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
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
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
