CASSANDRA MAPREDUCE OTHER TYPE COLUMNS

hii.. can some body please tell me how to select a column of type int or float and print that column value in cassandra mapreduce? every thing I read is about reading a String column form cassandra and print the values..

Re: DELETE does not delete :)

Hi Nick, Thanks for the note! We have our cassanra instances installed on virtual hosts in VMWare and the clock synchronization is handled by the latter, so I can't use ntpdate (says that NTP socket is in use). Is there any way to check if the clocks are really synchronized? My best attempt was us

Re: Question about info returned from 'nodetool gossipinfo'

the output of "nodetool gossipinfo" are the application states of each endpoint/node in the cluster that are exchanged b/w the nodes during gossiping. "Severity" is basically a measure of compaction activity/events in a node ( see https://issues.apache.org/jira/browse/CASSANDRA-3722 for the det

Re: DELETE does not delete :)

Hi my two cents - before doing anything else, make sure clocks are synchronized to the millisecond. ntp will do so. Nick. On Mon, Oct 7, 2013 at 9:02 AM, Alexander Shutyaev wrote: > Hi all, > > We have encountered the following problem with cassandra. > > * We use *cassandra v2.0.0* from *Data

Re: DELETE does not delete :)

W dniu 07.10.2013 08:02, Alexander Shutyaev pisze: * We have not modified any *consistency settings* in our app, so I assume we have the *default QUORUM* (2 out of 3 in our case) consistency *for reads and writes*. cqlsh uses ONE by default, pycassa uses ONE by default too. I have no experienc

DELETE does not delete :)

Hi all, We have encountered the following problem with cassandra. * We use *cassandra v2.0.0* from *Datastax* community repo. * We have *3 nodes* in a cluster, all of them are seed providers. * We have a *single keyspace* with *replication factor = 3*: *CREATE KEYSPACE bof WITH replication = {

Question about info returned from 'nodetool gossipinfo'

Hi, Does anyone know what the information that comes from the "nodetool gossipinfo" command means? For example, what is the LOAD #'s meaning or the SEVERITY #? My load is 91457.0 and SEVERITY: 22.448. Also, next to STATUS:NORMAL is a negative #: -123311655 what does that # mean?

Re: AssertionError: DecoratedKey(... ) != DecoratedKey (...)

Update: I've reverted hinted_handoff_enabled back to its default value of true and the errors stopped. Is this just a coincidence, or could be related? On Sun, Oct 6, 2013 at 7:23 PM, Ran Tavory wrote: > Pardon me, now with the appropriate subject line... > > Hi, I have a small cluster of 1.2.

com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write query

Hi all, when using the java-driver I see this error on the client, for reads (as well as for writes). Many of the ops succeed, however I do see a significant amount of errors. com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write query at consistency ONE (1 repl

AssertionError: DecoratedKey(... ) != DecoratedKey (...)

Pardon me, now with the appropriate subject line... Hi, I have a small cluster of 1.2.6 and after some config changes I started seeing errors int the logs. Not sure that's related, but the changes I performed were to disable hinted handoff and disable auto snapshot. I'll try to reverte these, see

[no subject]

Hi, I have a small cluster of 1.2.6 and after some config changes I started seeing errors int the logs. Not sure that's related, but the changes I performed were to disable hinted handoff and disable auto snapshot. I'll try to reverte these, see if the picture changes. But anyway, that seems like

Re: Facebook Cassandra

As it relates to c* http://www.cs.cornell.edu/Projects/ladis2009/papers/Lakshman-ladis2009.PDF We have built, implemented, and operated a storage sys- tem providing scalability, high performance, and wide appli- cability. We have empirically demonstrated that Cassandra can support a very high upd