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81 discussions - 338 posts

  • Try with the correct IP address as below: cqlsh 192.248.15.219 -u sinmin -p xxxxxx CQL documentation - http://docs.datastax.com/en/cql/3.0/cql/cql_reference/cqlsh.html
    AjayAjay
    Jul 19, 2015 at 8:38 am
    Jul 27, 2015 at 4:04 pm
  • Hi, I have a 2 node setup on Azure (east us region) running Ubuntu server 14.04LTS. Both nodes have 8GB RAM. One of the nodes (seed node) died with OOM - so, I am trying to add a replacement node ...
    Kunal GangakhedkarKunal Gangakhedkar
    Jul 10, 2015 at 7:59 am
    Jul 13, 2015 at 5:28 pm
  • Hello, I have a 4 node cluster with SimpleSnitch. Cassandra : Cassandra 2.1.3 I am trying to add a new node (cassandra 2.1.7) and I get the following error. ERROR [STREAM-IN-] 2015-06-30 05:13:48,516 ...
    Neha TrivediNeha Trivedi
    Jul 1, 2015 at 4:17 am
    Jul 2, 2015 at 2:11 pm
  • Data structures that have a recently-modified access pattern seem to be a poor fit for Cassandra. I’m wondering if any of you smart guys can provide suggestions. For the sake of discussion, lets ...
    Robert WilleRobert Wille
    Jul 21, 2015 at 4:00 am
    Jul 24, 2015 at 4:24 pm
  • Hi, I have basic doubt: I have an RDBMS with the following two tables: Emp - EmpID, FN, LN, Phone, Address Sal - Month, Empid, Basic, Flexible Allowance My use case is to print the Salary slip at the ...
    Srinivasa T NSrinivasa T N
    Jul 6, 2015 at 12:02 pm
    Jul 11, 2015 at 9:57 pm
  • I know you can use `nodetool removenode` from the command line but is there a way to remove a node from a cluster using OpsCenter?
    Sid TantiaSid Tantia
    Jul 7, 2015 at 7:30 pm
    Jul 29, 2015 at 1:29 am
  • Hi, I am currently performing benchmarks on Cassandra. Independently from each other I am seeing ~100k writes/sec and ~50k reads/sec. When I read and write at the same time, writing drops down to ...
    Soerian LieveSoerian Lieve
    Jul 23, 2015 at 9:53 pm
    Jul 29, 2015 at 8:53 pm
  • Hi everyone, Recently I've noticed that most of the nodes have OpsCenter agents running at 300% CPU. Each node has 4 cores, so agents are using 75% of total available CPU. We're running 5 nodes with ...
    Mikhail StrebkovMikhail Strebkov
    Jul 14, 2015 at 6:58 pm
    Jul 20, 2015 at 3:42 pm
  • Hi All, After I added node, I run node tool cleanup on the old notes , but it takes forever, no error message, and I don't see space are freed. What should I do ? Repair first ? Thanks Rock
    Rock zhangRock zhang
    Jul 24, 2015 at 10:57 pm
    Jul 25, 2015 at 7:05 pm
  • Hi there, Within our Cassandra cluster, we're observing, on occasion, one or two nodes at a time becoming partially unresponsive. We're running 2.1.7 across the entire cluster. nodetool still reports ...
    Bryan ChengBryan Cheng
    Jul 22, 2015 at 9:55 pm
    Jul 23, 2015 at 1:24 am
  • Is it ok to run this https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/ Seeing high cpu consumption for cassandra process
    Snair123 .Snair123 .
    Jul 1, 2015 at 2:55 am
    Jul 1, 2015 at 8:23 pm
  • We have a primary table and we need search capability by batchid column. So we are creating a manual index for search by batch id. We are using buckets to restrict a row size in batch id index table ...
    Anuj WadehraAnuj Wadehra
    Jul 23, 2015 at 5:27 pm
    Jul 29, 2015 at 3:10 am
  • All, I have a 4 node Cassandra system running on 4 Ubuntu boxes. After updating to Cassandra 2.2.0 and keeping the same cassandra.yaml file, the nodes cannot see each other. When I do a nodetool ...
    Carlos ScheideckerCarlos Scheidecker
    Jul 22, 2015 at 9:45 pm
    Jul 23, 2015 at 1:19 am
  • My understanding is that Cassandra File Structure follows below naming convention /cassandra/data/ <key-spaces <table Whereas our file structure is as below, each table has multiple names and when we ...
    Saladi NaiduSaladi Naidu
    Jul 10, 2015 at 4:16 pm
    Jul 14, 2015 at 1:02 pm
  • Hi, I have a keyspace which is using about 19GB on most nodes in the cluster. However on one node the data directory for the only table in that keyspace now uses 52GB. It seems that old sstables are ...
    Jeff WilliamsJeff Williams
    Jul 6, 2015 at 2:26 pm
    Jul 7, 2015 at 10:08 am
  • We have a 28 node cluster, out of which only one node is experiencing timeouts. We thought it was the raid, but there are two other nodes on the same raid without any problem. Also The problem goes ...
    Shashi YachavaramShashi Yachavaram
    Jul 1, 2015 at 4:59 pm
    Jul 7, 2015 at 6:45 am
  • Hi. Here is a schema disagreement we encountered. Schema versions: b6467059-5897-3cc1-9ee2-73f31841b0b0: [10.0.1.100, 10.0.1.109] c8971b2d-0949-3584-aa87-0050a4149bbd: [10.0.1.55, 10.0.1.16, ...
    John WongJohn Wong
    Jul 3, 2015 at 2:38 am
    Jul 6, 2015 at 8:53 pm
  • Hi. First, some details; * Ubuntu 14.04.2 LTS. * Oracle Java 8 * Cassandra 2.2 (from datastax repo) * AWS VPC - two regions (Oregon, Ireland) * A pair of 3 node DCs in a single cluster - 1 DC per ...
    James VannsJames Vanns
    Jul 30, 2015 at 4:24 pm
    Aug 3, 2015 at 3:28 pm
  • I'm wondering how the Cassandra protocol brings a newly bootstrapped node "up to speed". for ease of illustration, let's say we just have one key, K, and the value is continually updated: 1,2 ,3 ,4 ...
    YangYang
    Jul 28, 2015 at 8:31 am
    Jul 28, 2015 at 9:24 pm
  • Hello all, After updating to Cassandra 2.2.0 from 2.1.6 I am having SSL issues: My JVM is java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server ...
    Carlos ScheideckerCarlos Scheidecker
    Jul 23, 2015 at 3:22 am
    Jul 23, 2015 at 9:03 pm
  • Hi, I am currently benchmarking Cassandra with three machines, and on each machine I am seeing an unbalanced distribution of data among the data directories (1 per disk). I am concerned that this ...
    Soerian LieveSoerian Lieve
    Jul 17, 2015 at 9:08 pm
    Jul 20, 2015 at 7:01 pm
  • Hello, I cannot find documentation on the last two parameters given by cfstats below. It looks like most examples show 0 for these metrics, but our table has large numbers. What do these mean? Read ...
    Venkatesh KandaswamyVenkatesh Kandaswamy
    Jul 6, 2015 at 11:24 pm
    Jul 9, 2015 at 7:39 pm
  • Hi, I have weird driver behaviour. Can you help me please to find the problem? Problem: I try to insert data using 10 threads. I see that 10 thread starts, they start to insert some data and then ...
    Serega SheypakSerega Sheypak
    Jul 2, 2015 at 8:00 am
    Jul 3, 2015 at 12:59 pm
  • Hello, I start a node with the write survey = true -Dcassandra.write_survey=true Log: INFO [main] 2015-07-29 15:29:35,697 StorageService.java (line 853) Startup complete, but write survey mode is ...
    Aeljami ExtAeljami Ext
    Jul 29, 2015 at 3:05 pm
    Jul 30, 2015 at 5:32 pm
  • Hello! I've noticed a strange CPU utilisation patterns on machines in our cluster. After C* daemon restart it behaves in a normal way, after a few weeks since a restart CPU usage starts to raise ...
    Marcin PietraszekMarcin Pietraszek
    Jul 20, 2015 at 7:16 am
    Jul 28, 2015 at 2:30 pm
  • Hi, I am starting to setup Usergrid on Cassandra, but I run into an issue that I debugged into and which does not seem to be related to Usergrid or my setup, since I run into an AssertionError (which ...
    Andreas SchlüterAndreas Schlüter
    Jul 25, 2015 at 4:22 pm
    Jul 28, 2015 at 8:17 am
  • Hi All, I have 6 node, most of them are using node1 as seed, but I just find out 2 nodes are using node3 as seed, but everything looks fine. Does that mean seed node does not have to be same on all ...
    Rock zhangRock zhang
    Jul 25, 2015 at 7:29 pm
    Jul 26, 2015 at 5:04 pm
  • Problem: Log analytics. Solutions: 1) Aggregating logs using Flume and storing the aggregations into Cassandra. Spark reads data from Cassandra, make some computations and write the results in ...
    Renato PeriniRenato Perini
    Jul 23, 2015 at 12:06 am
    Jul 23, 2015 at 4:01 pm
  • Hi, I have a running cluster running with version 2.1.7. Two of the machines went down and they are not joining the cluster even after restart. I see the following WARN message in system.log in all ...
    Amlan RoyAmlan Roy
    Jul 1, 2015 at 10:46 am
    Jul 21, 2015 at 4:43 pm
  • Hi all, Please, is that possible to change this command: nodetool getendpoints MyKeyspace MyTable text 10.147.243.4 10.147.243.5 to nodetool getendpoints MyKeyspace MyTable text="Hello" ? is there a ...
    Thouraya THThouraya TH
    Jul 20, 2015 at 11:55 am
    Jul 20, 2015 at 4:16 pm
  • Regards to all Cassandra´s users. I just wanted to inform there is a new Java Zero Day exploit recently discovered by Trend Micro around the Hacking Team massive leak. This exploit is affecting the ...
    Marcos OrtizMarcos Ortiz
    Jul 14, 2015 at 7:34 pm
    Jul 15, 2015 at 1:01 am
  • We get lots of write timeouts when we decommission a node. About 80% of them are write timeout and just about 20% of them are read timeout. We’ve tried to adjust streamthroughput (and compaction ...
    Kevin BurtonKevin Burton
    Jul 1, 2015 at 9:23 pm
    Jul 2, 2015 at 1:11 am
  • ERROR [Reference-Reaper:1] 2015-07-29 12:34:45,941 Ref.java:179 - LEAK DETECTED: a reference (org.apache.ca[email protected]) to class ...
    Frisch, MichaelFrisch, Michael
    Jul 29, 2015 at 1:56 pm
    Jul 31, 2015 at 3:20 pm
  • Hi ALL The result of “select * from t_test where id = 1” statement is not consistency, Could you tell me why? test case, I = 0; While I < 5: result = cassandra_session.execute(“select ratio from ...
    鄢来琼鄢来琼
    Jul 31, 2015 at 1:03 am
    Jul 31, 2015 at 1:54 am
  • Hi, I get the following error intermittently while writing to Cassandra. I am using version 2.1.7. Not sure how to fix the actual issue without increasing the timeout in cassandra.yaml. Regards, ...
    Amlan RoyAmlan Roy
    Jul 15, 2015 at 7:28 am
    Jul 28, 2015 at 9:36 pm
  • We have a transaction table,3 manually created index tables and few tables for reporting. One option is to go for atomic batch mutations so that for each transaction every index table and other ...
    Anuj WadehraAnuj Wadehra
    Jul 23, 2015 at 5:47 pm
    Jul 25, 2015 at 11:10 am
  • Hi, I have a simple (perhaps stupid) question. If I want to *search* data in cassandra, how could find in a text field all records which start with 'Cas' ( in sql I do select * from table where field ...
    AntonAnton
    Jul 21, 2015 at 4:53 pm
    Jul 22, 2015 at 9:06 am
  • Hi all, I've been upgrading several of our rings from 2.1.6 to 2.1.8 and I've noticed that after the upgrade our storage load drops significantly (I've seen up to an 80% drop). I believe most of the ...
    Mike HeffnerMike Heffner
    Jul 17, 2015 at 3:25 pm
    Jul 20, 2015 at 3:40 am
  • Hi, I'm trying to migrate from Cassandra 1.1 and Hector to a more up-to-date stack like Cassandra 1.2+ and CQL3. I have read http://www.datastax.com/dev/blog/thrift-to-cql3 ...
    Clement HonoreClement Honore
    Jul 16, 2015 at 9:23 am
    Jul 17, 2015 at 8:43 am
  • Hi, We're using Cassandra 2.0.10 ( 2 DC, 3 Nodes each RF=3 for each DC). During one of the weekly repairs, we received the following error: ERROR [ValidationExecutor:1280] 2015-07-12 22:18:10,992 ...
    Modha, DigantModha, Digant
    Jul 16, 2015 at 12:46 pm
    Jul 16, 2015 at 1:10 pm
  • Hi, I have a use case wherein I receive a daily batch of data; it's about 50M--100M records (a record is a list of integers, keyed by a UUID). The target is a 12-node cluster. Using a simple-minded ...
    David HaguenauerDavid Haguenauer
    Jul 13, 2015 at 10:33 pm
    Jul 14, 2015 at 1:51 pm
  • Hey guys, I have a table with RF=3 and LCS. Data model makes use of "wide rows". A certain query run against this table times out and tracing reveals the following error on two out of three nodes ...
    Roman TkachenkoRoman Tkachenko
    Jul 5, 2015 at 8:41 pm
    Jul 12, 2015 at 3:11 pm
  • Suppose I have a row of existing data with set of values for attributes I call this State1, and issue an update to some columns with Quorum consistency. If the write is succeeded in one node, Node1 ...
    Saladi NaiduSaladi Naidu
    Jul 8, 2015 at 9:08 pm
    Jul 8, 2015 at 11:13 pm
  • Hey guys, I'm using Ruby driver( http://datastax.github.io/ruby-driver/ ) for backup scripts. I tried to discover all peers and got wrong peers that are different with nodetool status ...
    NowarryNowarry
    Jul 6, 2015 at 8:46 pm
    Jul 6, 2015 at 9:34 pm
  • I have two test clusters, both 2.0.15. One has a single node and one has three nodes. Truncate on the three node cluster is really slow, but is quite fast on the single-node cluster. My test cases ...
    Robert WilleRobert Wille
    Jul 1, 2015 at 9:53 pm
    Jul 1, 2015 at 10:25 pm
  • HI I have a 6 node cluster and I ran a major compaction on node 1 but I found that the load reached very high levels on node 2. Is this explainable? Attaching tpstats and metrics: cassandra-2 ~]$ ...
    Jayapandian PonrajJayapandian Ponraj
    Jul 1, 2015 at 2:03 pm
    Jul 1, 2015 at 5:01 pm
  • All, Would you please point me to location where I can adjust/reconfig, so that I can insert into Blob field more than 500 bytes chunks without Cluster crash on me. I read from the user forum and saw ...
    Noah chanmalaNoah chanmala
    Jul 30, 2015 at 5:05 pm
    Jul 31, 2015 at 12:14 pm
  • Hello everyone, we are experiencing performance issues with Cassandra overloading effects (dropped mutations and node drop-outs) with the following workload: create table test (year bigint, spread ...
    Petter. AndreasPetter. Andreas
    Jul 23, 2015 at 10:55 am
    Jul 23, 2015 at 6:15 pm
  • Hi there, I am running a 6 node cluster on 2.1.7 with a table using DTCS to store time series data, for up to 12 hours (using ttl of 12h). Data are written as they arrive, without any update or ...
    Christophe SchmitzChristophe Schmitz
    Jul 21, 2015 at 1:21 am
    Jul 21, 2015 at 8:32 pm
  • Hi, So since, I upgraded to 2.2-rc2 I get the CASSANDRA-9643 warning : WARN o.a.c.i.s.f.b.BigTableWriter - Compacting large partition XXXX bytes Some of my partitions may have ~20 millions of rows, ...
    Pierre DevopsPierre Devops
    Jul 20, 2015 at 1:33 pm
    Jul 20, 2015 at 6:32 pm
Jul 2015
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116 users for July 2015

Robert Coli: 24 posts Sebastian Estevez: 15 posts Kunal Gangakhedkar: 10 posts Anuj Wadehra: 9 posts Neha Trivedi: 9 posts Robert Wille: 9 posts Alain RODRIGUEZ: 8 posts Carlos Scheidecker: 8 posts Chamila Wijayarathna: 7 posts Jeff Williams: 7 posts Mikhail Strebkov: 7 posts Peer, Oded: 7 posts Carlos Rolo: 6 posts Jack Krupansky: 6 posts John Wong: 6 posts Rock zhang: 6 posts Soerian Lieve: 6 posts Carlos Alonso: 5 posts Jason Wee: 5 posts Michael Shuler: 5 posts
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