Re: Node Inconsistency

Thank you all for your assistance. I has been very helpful. I have few more questions: 1. If we change the write/delete consistency level to ALL, do we eliminate the data inconsistency among nodes (since the delete operations will apply to ALL replicas)? 2. My understanding is that "Read Repair"

Re: Need some beginner help with Eclipse+Hector with Cassandra 0.7

Add commons-pooling to the classpath (the remaining references will be removed shortly as it is no longer actively used). An updated version of the Hector doc will be out shortly to reflect a few minor changes - thanks for pointing out this specifically though. I've cc'ed hector-us...@googlegroups

Need some beginner help with Eclipse+Hector with Cassandra 0.7

Hi, I'm trying to use Eclipse with Hector (latest version) to write a new row to Cassandra 0.7RC4. However, I keep getting a Java error. Any Here is the .java file: - - - - - - import me.prettyprint.cassandra.serializers.StringSerializer; import me.prettyprint.cassandra.service.CassandraHostConf

Re: Cassandra 0.7.0 Release in Riptano public repository?

On 10 January 2011 19:44, Oleg Tsvinev wrote: > Hi, > http://cassandra.apache.org/download/ shows that > "The latest stable release of Apache Cassandra is 0.7.0 (released on > 2011-01-09). If you're just starting out, download this one." > However, I don't see this version in  Riptano public repos

Re: Node Inconsistency

> Short version: Once GCGraceSeconds expires, the tombstone is no longer > relevant as will not be included in RR (otherwise, you could have > nodes that haven't compacted yet, RR tombstones to other replicas that > had removed it).  Long version: see my last comment on > https://issues.apache.org/

Re: Cassandra 0.7.0 Release in Riptano public repository?

On Mon, 2011-01-10 at 16:51 -0500, Michael Fortin wrote: > Is there a roadmap posted somewhere for cassandra? I didn't see one > on the wiki. The closest we get to a documented roadmap are the bugs that block the release in our JIRA instance. > I was curious to know what major features are in

Re: Cassandra 0.7.0 Release in Riptano public repository?

For Cassandra, the issues-to-version is managed daily. Keeping tabs on that is probably the best idea of a Roadmap. Further, anyone can sign up for an ASF Jira account and submit issues as well as comment on and even "vote" for existing ones. https://issues.apache.org/jira/browse/CASSANDRA On Mon

Re: Cassandra 0.7.0 Release in Riptano public repository?

Congrats on the release. Is there a roadmap posted somewhere for cassandra? I didn't see one on the wiki. I was curious to know what major features are in future and if there was a crude timeline for a 1.0 release. thanks, mike On Jan 10, 2011, at 2:50 PM, Nate McCall wrote: > The RPM wa

Re: monitoring with Zabbix

we use zabbix. we run the agent on our linux boxes and also start zapcat using the class that follows. essentially you go into the zabbix console and setup "hosts" for the zapcat port, and "hosts" for the zabbix agent. then setup items for the "zapcat host" that are JMX metrics. info on zap

Re: Node Inconsistency

Just to add, the cli works at CL One. What do you see what you use a higher CL through an API? A On 11/01/2011, at 10:31 AM, Peter Schuller wrote: >> above. From looking at the data I'm guessing that the results from the 3 >> nodes are correct and the results from the 2 nodes are old (the dif

Re: Node Inconsistency

On Mon, Jan 10, 2011 at 3:31 PM, Peter Schuller wrote: > Now, GCGraceSeconds/repair issues would not explain, to me at least, > why read-repair is not fixing the discrepancy. Short version: Once GCGraceSeconds expires, the tombstone is no longer relevant as will not be included in RR (otherwise,

Re: Node Inconsistency

> above.  From looking at the data I'm guessing that the results from the 3 > nodes are correct and the results from the 2 nodes are old (the diff between > the result sets is that the 54 is a subset of the 68). If I interpret the thread correctly, those 2 that you say you believe are old are the

Re: Reclaim deleted rows space

I'd suggest describing your approach on https://issues.apache.org/jira/browse/CASSANDRA-1608, and if it's attractive, porting it to 0.8. It's too late for us to make deep changes in 0.6 and probably even 0.7 for the sake of stability. On Mon, Jan 10, 2011 at 8:00 AM, shimi wrote: > I modified th

Re: Cassandra 0.7.0 Release in Riptano public repository?

The RPM was deployed around 17:00 GMT. Are you trying to download the package directly or was this from yum? http://rpm.riptano.com/EL/6/x86_64/ On Mon, Jan 10, 2011 at 1:44 PM, Oleg Tsvinev wrote: > Hi, > http://cassandra.apache.org/download/ shows that > "The latest stable release of Apache Cas

Cassandra 0.7.0 Release in Riptano public repository?

Hi, http://cassandra.apache.org/download/ shows that "The latest stable release of Apache Cassandra is 0.7.0 (released on 2011-01-09). If you're just starting out, download this one." However, I don't see this version in Riptano public repository. The latest there is still 0.7.0-rc4. Is there

Re: Node Inconsistency

Hi, Tyler, I'm working with Vram on this project and can respond to your questions. We do indeed continue to get inconsistent data after many read operations. These columns and rowkeys are months old and they have had many reads done on them over that time. Using cassandra-cli we see that on 3

Re: monitoring with Zabbix

Hi Daniel, A recent web search found your earlier message, but I had a few (potentially dumb) questions - so this is very good timing! :) When you say start with Cassandra - my first dumb question is how you actually do this. Are you using packaged versions or tarball installs of Cassandr

Re: Node Inconsistency

What version of Cassandra? What consistency level are you writing/reading at? Do you continue to get inconsistent results when you read the same data over and over (i.e. read repair is not fixing something)? Do all of your nodes show the same thing when you run nodetool ring against them? - Tyl

Re: A few quick questions to help me design a better schema..

> > Though in general I would say that it is worth considering. In > particular if you have certain data that is accessed a lot more > frequently than other data (especially if the "other data" is large), > the improved cache locality of keeping the frequently accessed data > separate can be high (

Re: Building a News-feed that comprises posts “cre ated by user's connections” && “on the topics user is fo llowing”

> Actually the person who is posting will not be restricted by any limit on > the kind of topics he could post on. He may even post on the topics beyond > the list of what he himself is following. Thus this list cannot be defined > from earlier and since the topics list would comprise in hundreds p

Node Inconsistency

We are running a five node cluster in production with a replication factor of three. The query results from the 5 nodes are returning different results (2 of the 5 nodes return extra columns for the same row key). We are not sure the root of the problem (any config issues). Any suggestions? Thank

Re: Reclaim deleted rows space

I modified the code to limit the size of the SSTables. I will be glad if someone can take a look at it https://github.com/Shimi/cassandra/tree/cassandra-0.6 Shimi On Fri, Jan 7, 2011 at 2:04 AM, Jonathan Shook wrote: > I believe the follow

Re: Building a News-feed that comprises posts “cre ated by user's connections” && “on the topics user is fo llowing”

Thanks so much Tyler. Actually the person who is posting will not be restricted by any limit on the kind of topics he could post on. He may even post on the topics beyond the list of what he himself is following. Thus this list cannot be defined from earlier and since the topics list would compris

Re: monitoring with Zabbix

We use zabbix and cassandra like so: http://www.mail-archive.com/user@cassandra.apache.org/msg08100.html Daniel Doubleday, smeet.com On Jan 9, 2011, at 1:09 AM, ruslan usifov wrote: > Zapcat is a simple bridge between JMX and zabbix protocol, and it imho > doesn't allow collect info from other

Re: A few quick questions to help me design a better schema..

>> 4. ) Does the larger no of column families has any impact on the >> performance(I read about it somewhere)? Should information for a particular >> row key be split in multiple column families according to the specific query >> demands or should all data related to a particular row key be kept to