cassandra-2.1

问题 I have writeen code like belo but getting error as below:- InvalidRequest: Error from server: code=2200 [Invalid query] message="Java source compilation failed: Line 1: java.util.String cannot be resolved to a type Line 1: Syntax error on token "Date", @ expected Line 4: SimpleDateFormat cannot be resolved to a type CREATE FUNCTION saumya.text2dt ( input text ) RETURNS NULL ON NULL INPUT RETURNS timestamp LANGUAGE java AS $$ java.text.ParseException java.text.SimpleDateFormat java.util.Date

问题 I am using java driver version: 2.1.4 Cassandra version: dsc-cassandra-2.1.10 Output from cql gives the following cqlsh 5.0.1 | Cassandra 2.1.10 | CQL spec 3.2.1 | Native protocol v3 I am protocol V3. But it throws an exception when I try to set it to more than 128 requests per connection. This seems to be a restriction in V2. Explained below: The following code block: PoolingOptions poolingOptions = new PoolingOptions(); poolingOptions.setCoreConnectionsPerHost(HostDistance.LOCAL, 8);

问题 I am using java driver version: 2.1.4 Cassandra version: dsc-cassandra-2.1.10 Output from cql gives the following cqlsh 5.0.1 | Cassandra 2.1.10 | CQL spec 3.2.1 | Native protocol v3 I am protocol V3. But it throws an exception when I try to set it to more than 128 requests per connection. This seems to be a restriction in V2. Explained below: The following code block: PoolingOptions poolingOptions = new PoolingOptions(); poolingOptions.setCoreConnectionsPerHost(HostDistance.LOCAL, 8);

问题 I am using java driver version: 2.1.4 Cassandra version: dsc-cassandra-2.1.10 Output from cql gives the following cqlsh 5.0.1 | Cassandra 2.1.10 | CQL spec 3.2.1 | Native protocol v3 I am protocol V3. But it throws an exception when I try to set it to more than 128 requests per connection. This seems to be a restriction in V2. Explained below: The following code block: PoolingOptions poolingOptions = new PoolingOptions(); poolingOptions.setCoreConnectionsPerHost(HostDistance.LOCAL, 8);

问题 I am trying load testing by inserting 60k rows in cassandra and after few thousand i run into below error com.impetus.kundera.KunderaException: org.apache.thrift.transport.TTransportException: Read a negative frame size Code Details Cassndra Version : 2.1.10 <persistence-unit name="abc_pu"> <provider>com.impetus.kundera.KunderaPersistence</provider> <class>com.mycompany.model.abc.ClusteredData</class> <exclude-unlisted-classes>true</exclude-unlisted-classes> <properties> <property name=

问题 Wanted to check about Triggers feature in Cassandra. Can someone please provide an example for creating Trigger. From this blog, http://www.datastax.com/dev/blog/whats-new-in-cassandra-2-0-prototype-triggers-support To create a trigger, you must first build a jar with a class implementing the ITrigger interface and put it into the triggers directory on every node, then perform a CQL3 CREATE TRIGGER request to tie your trigger to a Cassandra table (or several tables). As per this info,

问题 We have 6 node cluster where we deploy everything to one region on AWS with 3 Availability Zones. We are using Ec2Snitch which should distribute one replica in each availability zone. We use DataStax Java driver. Servers doing write and read are distributed in availability zones same as nodes are (1 server by AZ). What we want to achieve is best possible read performance, write for us is not that important in a sense that we need to write data but not necessary fast. We use replication factor

问题 We have 6 node cluster where we deploy everything to one region on AWS with 3 Availability Zones. We are using Ec2Snitch which should distribute one replica in each availability zone. We use DataStax Java driver. Servers doing write and read are distributed in availability zones same as nodes are (1 server by AZ). What we want to achieve is best possible read performance, write for us is not that important in a sense that we need to write data but not necessary fast. We use replication factor

问题 I am trying to install the Datastax Community Edition on my Windows Machine. But my cassandra server is not able to start. It shows the following message: Detected powershell execution permissions. Running with enhanced startup scripts. Setting up Cassandra environment --------------------------------------------------------------------- --------------------------------------------------------------------- WARNING! Automatic page file configuration detected. It is recommended that you disable

问题 I have a 4 node setup in Cassandra and decided to go with the following configuration, but ppl are saying this will be same as 3 node setup, So could somebody please give me a light and say why, Nodes = 3, Replication Factor = 2, Write Consistency = 2, Read Consistency = 1 Nodes = 4, Replication Factor = 3, Write Consistency = 3, Read Consistency = 1 As per my understanding, Nodes = 4, provide the two node failure, It is beneficial to have RF as '3' but ppl are saying RF = 2 will be same as