cassandra in aws

Detailed configuration of Cassandra Understanding the meaning of a software configuration item is a prerequisite for using this software, which details the meaning of each configuration item in the Cassandra configuration file (Storage-config.xml), which contains a number of configuration parameters that we can adjust to achieve the desired performance. In order to save space there is no listing of the con

Cassandra is an open-source distributed database that combines the key/value of dynamo with the column-oriented Feature of bigtable. Cassandra has the following features: 1. Flexible Schema: It is very convenient to add or delete fields without having to pre-design the schema like a database ). 2. Support Range Query: You can query the range of keys. 3. high availability and scalability: sin

AWS EC2 Server Configuration load balancer steps:1. General Load BalancerAt least two EC2 instances, Here take the Centos6.7 system as an example to install an Apache httpd server default 80 port, or use a different server and port also line, configure the load balancer need to use this port iptables firewall open 80 port or directly shut down the firewall in/var /www/html inside the new index.html file, the content is arbitrary, register the instance

Amazon announced that they will provide new customers with a one-year free AWS usage method starting from November 1. The products involved include EC2, Server Load balancer, EBS, and S3. The methods provided by SimpleDB, SQS, and SNS to new and old customers are not yet determined. Customers can use the service wherever they want, but there are the following restrictions: 613 hours for Amazon EC2 Linux micro-instances (750 MB in memory, sup

AWS-based time series processing application architecture When data is used as a periodic continuous measurement, it is called time series information. AWS's unique positioning addresses the scale-up challenges brought by Time Series-based information processing. This elasticity is achieved through AutoScaling groups for collection and processing, AWS data pipelines for Amazon Elastic MapReduce scheduled jo

Our product has two module, deployed on separate Linux machine, module 1 need to launch HTTP request to Module 2 to obtain service. Since Module 2 has multiple units, we will deploy a load balancer (elb,elastic load Balancer) before Module 2. We're deployed in AWS, so we're using AWS ELB.　　　　AWS Elb also provides another good feature, called the Sticky Session, w

Exploring AWS and azure in cloud computing (3) -- Amazon EC2 and Windows azure Virtual Machine Today, I will compare the differences between AWS EC2 and azure VM processes. And compare some of their basic differences in the network environment.Article. Today, I will use a medium-size machine, AWS's M1 medium, memory 3.75 GB, 2 computing units, and storage 410 GB. On Azure, I will create an M machin

AWS Free Usage Considerations:The one-year free tier offered by AWS (Amazon Web Service) is tempting, and it's believed to be a lot of people, but usingSome things must be noted in the process, in order to avoid the ignorance of the charges will be deducted.1.EC2: When you create an instance, you choose an operating system labeled free tier eligible, which is provided for no additional charge.However, pleas

Amazon cloud computing platform AWS (Amazon Web Services) provides many companies with basic cloud Services. Dropbox, Instagram, Quora, Foursquare, Reddit, Heroku, and these new internet stars are able to shine brightly, and AWS has made great achievements; it allows small teams with ideas and technologies, world-class operation services can be obtained at a low price, which can withstand the rapid growth

AWS: how to deploy APIs on Amazon EC2? Bkjia: We think Amazon is an excellent platform for running API application programming interfaces, because you can fully control the application stack. For those who are new to AWS Amazon Web Services, learning is quite difficult. So we sorted out several best practices for readers and made them into this short tutorial. In addition to Amazon EC2 Elastic Computing cl

There are 2 ways to migrate table data in Cassandra, with Keyspace named user mydb,table as an example:Method one: Copy command.This approach is suitable for situations where the amount of data is small.1. Enter Cqlsh, input command: COPY mydb.user to '/USR/USR.SCV ';　　2. Locate the USR.SCV file that you just generated and copy it to the server that you want to migrate　　3. In the Migrated data table user (the table structure is the same), and then ent

Cassandra Default build Keyspace time, it is necessary to develop a topology strategy, small data directly with a single data center Simplestrategy, the online data are not specifically how to configure the multi-data center, here simply PasteCassandra.yaml inside Modify Endpoint_snitchThe specific Snitch method hasSimplesnitchDefault, Single data centerGossipingpropertyfilesnitchOfficially recommended for use in production environments, the rack and

Some time ago, cassandra0.7 was officially released. Next, cassandra1.0 will be released soon. The content of the email list is as follows: Way back in Nov 09, we did a users survey and asked what featuresPeople wanted to see. Here was my summary of the responses:Http://www.mail-archive.com/Cassandra-user @ incubator.Apache.org/ms00001446.html Looking at that, we 've done essential all of them. I think we canMake a strong case that our next rele

This problem is mostly due to the errors that are caused by running multiple Cassandra instances, which can be found in the Cassandra startup script:# See CASSANDRA-7254 "$JAVA" -cp$classpath $jvm_opts 2> 1| grep-q ' error:exception thrown by the agent: Java.lang.NullPointerException ' if[? -ne "1" ]; then Echo unable to bind JMX, is