hector

Cassandra Hector: How to retrieve all rows of a column family?

 ̄綄美尐妖づ 提交于 2019-11-30 11:48:48
问题 I am looking for a code example to retrieve all rows and all columns of a column family. Something like: SELECT * FROM MyTable I see that this can be done using a RangeSlicesQuery, but you still have to provide a certain range. And I think you have to specify the column names too. Is there a clean and safe way to do this? Using Hector 1.0 and Cassandra 1.0. 回答1: Try something like this: public class Dumper { private final Cluster cluster; private final Keyspace keyspace; public Dumper() {

Why don't you start off with a “single & small” Cassandra server as you usually do it with MySQL?

末鹿安然 提交于 2019-11-30 06:36:36
问题 For any website just starting out, the load initially is minimal & grows with a slow pace initially. People usually start with their MySQL based sites with a single server(***that too a VPS not a dedicated server) running as both app server as well as DB server & usually get too far with this setup & only as they feel the need they separate the DB from the app server giving it a separate VPS server. This is what a start up expects the things to be while planning about resources procurement.

Cassandra Hector: How to retrieve all rows of a column family?

半城伤御伤魂 提交于 2019-11-30 00:22:53
I am looking for a code example to retrieve all rows and all columns of a column family. Something like: SELECT * FROM MyTable I see that this can be done using a RangeSlicesQuery, but you still have to provide a certain range. And I think you have to specify the column names too. Is there a clean and safe way to do this? Using Hector 1.0 and Cassandra 1.0. tom.wilkie Try something like this: public class Dumper { private final Cluster cluster; private final Keyspace keyspace; public Dumper() { this.cluster = HFactory.getOrCreateCluster("Name", "hostname"); this.keyspace = HFactory

Why don't you start off with a “single & small” Cassandra server as you usually do it with MySQL?

試著忘記壹切 提交于 2019-11-28 20:18:18
For any website just starting out, the load initially is minimal & grows with a slow pace initially. People usually start with their MySQL based sites with a single server(***that too a VPS not a dedicated server) running as both app server as well as DB server & usually get too far with this setup & only as they feel the need they separate the DB from the app server giving it a separate VPS server. This is what a start up expects the things to be while planning about resources procurement. But so far what I have seen, it's something very different with Cassandra. People usually recommend

Cassandra Client Java API's [closed]

半世苍凉 提交于 2019-11-27 17:26:41
I have recently started working with Cassandra Database. Now I am in the process of evaluating which Cassandra client we should go forward with. I have seen various post on stackoverflow about which client to use for Cassandra but none has very definitive answer. My team has asked me to do some research on this and come up with certain pros and cons for each Cassandra Client API’s in Java. As I mentioned, I recently got involved with Cassandra so not have that much idea why certain people choose Pelops client and why certain people go with Astyanax and some other clients. I know brief things