Ignite

Run ignite as docker

$ docker pull apacheignite/ignite
$ docker run -it --net=host -e "CONFIG_URI=https://raw.githubusercontent.com/apache/ignite/master/examples/config/example-cache.xml" apacheignite/ignite

$ pip install pylibmc

Connect to ignite as memcache with python

import pylibmc
client = pylibmc.Client (["127.0.0.1:11211"], binary=True)
client.set("key", 2**60)
client.set("key", b'You need to send message as binary')
print("Value for 'key': %s"%client.get("key"))

There is an error when try to set string value for keys instead of binary.

client.set("key", 'string message')

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
_pylibmc.ConnectionError: error 3 from memcached_set: (0x21104c0) CONNECTION FAILURE, ::rec() returned zero, server has disconnected,  host: 127.0.0.1:11211 -> libmemcached/io.cc:484

https://apacheignite.readme.io/docs/memcached-support#section-python

Enable HTTP rest API

$ docker run --name ignite --net=host -e "CONFIG_URI=https://raw.githubusercontent.com/apache/ignite/master/examples/config/example-cache.xml" apacheignite/ignite

https://apacheignite.readme.io/docs/docker-deployment

TO enable HTTP connectivity, make sure that ignite-rest-http module is in the classpath of your application. With Ignite binary distribution, this means copying ignite-rest-http module from IGNITE_HOMElibsoptionalto IGNITE_HOMElibs folder.

https://apacheignite.readme.io/docs/rest-api#section-getting-started

$ docker exec -it ignite bash
bash-4.4# cp -r apache-ignite-fabric/libs/optional/ignite-rest-http/ apache-ignite-fabric/libs/

$ docker stop ignite
$ docker start ignite

$ curl http://localhost:8080/ignite?cmd=version
$ curl "http://localhost:8080/ignite?cmd=getorcreate&cacheName=default"

Ignite Configuration

Persistence

https://ignite.apache.org/arch/persistence.html

https://apacheignite.readme.io/docs/distributed-persistent-store

Memory

https://apacheignite.readme.io/docs/memory-configuration

https://apacheignite.readme.io/docs/cache-modes

http://apache-ignite-users.70518.x6.nabble.com/Best-practise-for-setting-Ignite-Active-to-true-when-using-persistence-layer-in-Ignite-2-1-td15839.html

<property name=”cacheMode” value=”LOCAL”/>

Evictions

https://apacheignite.readme.io/docs/evictions

Cluster is inactive

$ ./apache-ignite-fabric/bin/control.sh --activate

“”” [12:57:49,510][SEVERE][rest-#54][GridCacheCommandHandler] Failed to execute cache command: GridRestCacheRequest [cacheName=default, cacheFlags=0, ttl=null, super=GridRestRequest [destId=null, clientId=null, addr=/127.0.0.1:44546, cmd=GET_OR_CREATE_CACHE]] class org.apache.ignite.IgniteException: Can not perform the operation because the cluster is inactive. Note, that the cluster is considered inactive by default if Ignite Persistent Store is used to let all the nodes join the cluster. To activate the cluster call Ignite.active(true). “””

Sample Ingnite configuration file

<?xml version="1.0" encoding="UTF-8"?>


<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="ignite.cfg" class="org.apache.ignite.configuration.IgniteConfiguration">
        <property name="dataStorageConfiguration">
            <bean class="org.apache.ignite.configuration.DataStorageConfiguration">
                <property name="defaultDataRegionConfiguration">
                    <bean class="org.apache.ignite.configuration.DataRegionConfiguration">
                        <property name="name" value="region_20MB"/>
                        <property name="persistenceEnabled" value="true"/>
                        <!-- 20MB -->
                        <property name="initialSize" value="#{20L * 1024 * 1024}"/>
                        <!-- 20MB -->
                        <property name="maxSize" value="#{20L * 1024 * 1024}"/>
                        <property name="pageEvictionMode" value="RANDOM_LRU"/>
                    </bean>
                </property>
            </bean>
        </property>
        <property name="cacheConfiguration">
            <list>
                <!-- Partitioned cache example configuration (Atomic mode). -->
                <bean class="org.apache.ignite.configuration.CacheConfiguration">
                    <property name="name" value="default"/>
                    <property name="dataRegionName" value="region_20MB"/>
                    <property name="atomicityMode" value="ATOMIC"/>
                    <property name="backups" value="1"/>
                </bean>
            </list>
        </property>
        <property name="discoverySpi">
            <bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi">
                <property name="ipFinder">
                    <bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.multicast.TcpDiscoveryMulticastIpFinder">
                        <property name="addresses">
                            <list>
                                <!-- In distributed environment, replace with actual host IP address. -->
                                <value>127.0.0.1:47500..47509</value>
                            </list>
                        </property>
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
</beans>