cassandra-0.7

How to programatically add index to Cassandra 0.7

由 核能气质少年 提交于 2020-01-04 02:27:26
问题 I tried to run the demo on http://www.riptano.com/blog/whats-new-cassandra-07-secondary-indexes programatically, but the results are different from running it in CLI. It seems like Cassandra can only index columns after index is added. All previous data are left unindexed. Full source code are as below:- public static void main(String[] args) { try { try { transport.open(); } catch (TTransportException ex) { Logger.getLogger(IndexLaterTest.class.getName()).log(Level.SEVERE, null, ex); System

how to integrate cassandra with zookeeper to support transactions

由 倾然丶 夕夏残阳落幕 提交于 2019-12-30 04:01:13
问题 I have a Cassandra cluster and Zookeeper server installed. Now I want to support transactions in cassandra using zookeeper. How do i do that. Zookeeper creates znodes to perform read and write operations and data to and fro goes through znodes in Zookeeper. I want to know that how to support rollback and commit feature in cassandra using Zookeeper. Is there any way by which we can specify cassandra configurations in zookeeper or zookeeper configurations in cassandra. I know cassandra and

Availability of Cassandra

由 假如想象 提交于 2019-12-22 04:37:18
问题 I am running into an issue "me.prettyprint.hector.api.exceptions.HUnavailableException: : May not be enough replicas present to handle consistency level." when I have RF=1, Read Consistency Level = 1 and one of the nodes in 6 node ring/ cluster is down. All of my reads are failing with this exception. Any idea? Ideally only reads that are looking for data in the node which is down should fail and all other reads should be successful? 回答1: There could be a few possibilities: You're running a

cannot delete row key

由 穿精又带淫゛_ 提交于 2019-12-14 03:51:51
问题 I'm having an issue while deleting row key in Cassandra. Whenever I delete Row Key all the columns contained by that RowKey are deleted but RowKey itself is not deleted. Can anybody tell me how to remove a rowkey, once it is inserted in columnfamily. I'm looking forward to do that via thrift client. 回答1: This is a side effect of how distributed deletes work in Cassandra. From the Cassandra wiki page on distributed deletes: [A] delete operation can't just wipe out all traces of the data being

Cassandra clustername mismatch

由 二次信任 提交于 2019-12-12 17:22:05
问题 I'm trying to add a single node to an already existing cluster called ClusterA. Prior to bootstrapping this node, it was running a single node cassandra cluster called "Test" with an older version 0.7.4. ClusterA is running 0.7.5 and I've upgraded the node to be added to 0.7.5 as well. I configured the yaml properly, but when I run Cassandra I get spammed with the following: INFO 20:04:24,262 Logging initialized INFO 20:04:24,275 Heap size: 5156896768/5156896768 INFO 20:04:24,276 JNA not

Apache thrift can not make

由 淺唱寂寞╮ 提交于 2019-12-11 07:48:34
问题 When I'm trying to configure and make thrift 0.9.1 it gives some errors. Can anyone tell me the reason for that and what should I do to overcome this issue. Errors are shown in below. user@linux-yyzo:~/WorkDir/thrift-0.9.1> make make all-recursive make[1]: Entering directory `/home/user/WorkDir/thrift-0.9.1' Making all in compiler/cpp make[2]: Entering directory `/home/user/WorkDir/thrift-0.9.1/compiler/cpp' make all-am make[3]: Entering directory `/home/user/WorkDir/thrift-0.9.1/compiler/cpp

Availability of Cassandra

由 ℡╲_俬逩灬. 提交于 2019-12-05 04:48:38
I am running into an issue "me.prettyprint.hector.api.exceptions.HUnavailableException: : May not be enough replicas present to handle consistency level." when I have RF=1, Read Consistency Level = 1 and one of the nodes in 6 node ring/ cluster is down. All of my reads are failing with this exception. Any idea? Ideally only reads that are looking for data in the node which is down should fail and all other reads should be successful? There could be a few possibilities: You're running a multi-row query (get_range, get_indexed_slices, multiget, or the cql equivalents) that requires multiple

Cassandra starting issue

由 ＊爱你＆永不变心＊ 提交于 2019-12-02 02:03:55
I have problems starting Cassandra. The follow is my terminal output when I try to issue a start command: root@gestion:~# cassandra -f Exception in thread "main" java.lang.ExceptionInInitializerError Caused by: java.lang.RuntimeException: Couldn't figure out log4j configuration. at org.apache.cassandra.service.AbstractCassandraDaemon.(AbstractCassandraDaemon.java:75) Could not find the main class: org.apache.cassandra.thrift.CassandraDaemon. Program will exit. I exported the JAVA_HOME path. I am on an 10.04 Lucid machine. Can anyone please help me? Actually the issue is that cassandra could

how to integrate cassandra with zookeeper to support transactions

由 半城伤御伤魂 提交于 2019-11-30 11:44:56
I have a Cassandra cluster and Zookeeper server installed. Now I want to support transactions in cassandra using zookeeper. How do i do that. Zookeeper creates znodes to perform read and write operations and data to and fro goes through znodes in Zookeeper. I want to know that how to support rollback and commit feature in cassandra using Zookeeper. Is there any way by which we can specify cassandra configurations in zookeeper or zookeeper configurations in cassandra. I know cassandra and zookeeper individually how data is read and written but I dont know how to integrate both of them using
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