aerospike

Can anyone say if Aerospike is as good as they claim it to be? I'm a bit skeptical since it's a commercial enterprise. As far as I understand they just released a open source version, but the claims on their website could still be exaggerated. I'm especially interested on how Aerospike compares to MongoDB. Eumcoz I have used Aerospike, MongoDB and Redis and have tested many other NoSQL databases. I would say Aerospike is very good at what it does but it is different than MongoDB. Everything depends on what you are planning on using a database for. I can give you an example of what I am using

Aerospike is a key-value, in-memory, operational NoSQL database with ACID properties which support complex objects and easy to scale. But I have already used something which does absolutely the same. Redis is also a key-value, in-memory (but persistent to disk) NoSQL database. It also support different complex objects. But in comparison to Aerospike, Redis was in use for a lot of time, already have an active community and a lot of projects developed in it. So what is the difference between aerospike and other no-sql key-value databases like redis. Is there a particular place which is better

Both Aerospike and Cassandra says they are better than the other in their own respective benchmarks. Reference : http://java.dzone.com/articles/benchmarking-cassandra-right and a few others. Has anyone used both of them ? Is Aerospike as good as claimed? Finally is it advisable to replace Cassandra with Aerospike ? Choosing between Cassandra and Aerospike really depends on your use case more than anything. I have personally used both as a production system for the same project and for me Aerospike was the clear winner but that's because our use case is to have highly concurrent, low latency,

I have build a Docker image from a Docker file using the below command. $ docker build -t u12_core -f u12_core . When I am trying to rebuild it with the same command, it's using the build cache like: Step 1 : FROM ubuntu:12.04 ---> eb965dfb09d2 Step 2 : MAINTAINER Pavan Gupta <pavan.gupta@gmail.com> ---> Using cache ---> 4354ccf9dcd8 Step 3 : RUN apt-get update ---> Using cache ---> bcbca2fcf204 Step 4 : RUN apt-get install -y openjdk-7-jdk ---> Using cache ---> 103f1a261d44 Step 5 : RUN apt-get install -y openssh-server ---> Using cache ---> dde41f8d0904 Step 6 : RUN apt-get install -y git

Aerospike client has scanAll method for reading all rows from it's store. I use it in the folowing code: ScanPolicy policy = new ScanPolicy(); policy.concurrentNodes = true; policy.priority = Priority.DEFAULT; policy.includeBinData = true; policy.scanPercent = 100; client.scanAll(policy, "namespaceName", "setName", new ScanCallback() { @Override public void scanCallback(Key key, Record record) throws AerospikeException { STORE.put(key.userKey.toLong(), record.getValue("binName").toString()); } }); But it is finished with NullPointerException , because userKey is null. All other fields are

一、引子 1、为什么Windows操作系统、用了SSD的系统盘，就不能用磁盘碎篇整理功能？ 如果你平时用的是Windows电脑，你会发现，用了SSD的系统盘，就不能用磁盘碎片整理功能。这是因为，一旦主动去运行磁盘碎片整理功能，就会发生一次块的擦除， 对应块的寿命就少了一点点。这个SSD的擦除寿命的问题，不仅会影响像磁盘碎片整理这样的功能，其实也很影响我们的日常使用。 2、读多的场景 我们的操作系统上，并没有SSD硬盘上各个块纸目前已经擦写的情况和寿命，所以它对待SSD硬盘和普通的机械硬盘没有什么区别。 我们日常使用PC进行软件开发的时候，会先在硬盘上装上操作系统和常用软件，比如Office，或者工程师们会装上VS Code、WebStorm这样的集成开发环境。 这些软件所在的块，写入一次之后，就不太会擦除了，所以就只有读的需求。 3、写多的场景 一旦开始开发，我们就会不断添加新的代码文件，还会不断修改已经有的代码文件。因为SSD硬盘没有覆写（Override）的功能，所以，这个过程中，其实我们是在反复地写入新的文件，然后再把原来的文件标记成逻辑上删除的状态。等SSD里面空的块少了， 我们会用“垃圾回收”的方式，进行擦除。这样，我们的擦除会反复发现在这些用来存放数据的地方。 有一天，这些块的擦除次数到了，变成了坏块。但是，我们安装操作系统和软件的地方还没有坏