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第 3 章 Data Grid 缓存配置

缓存配置控制 Data Grid 如何存储您的数据。

作为缓存配置的一部分，您可以声明您要使用的缓存模式。例如，您可以将 Data Grid 集群配置为使用复制缓存或分布式缓存。

您的配置还定义了缓存的特性并启用您要在处理数据时使用的 Data Grid 功能。例如，您可以配置 Data Grid 对缓存中的条目进行编码的方式，无论是同步还是在节点间异步发生复制请求，如果条目是 mortal 或 immortal，等等。

3.1. 声明性缓存配置

您可以根据 Data Grid 模式，以 XML、JSON 和 YAML 格式配置缓存。

与编程配置相比，声明性缓存配置有以下优点：

可移植性
在独立文件中定义每个配置，可用于创建嵌入和远程缓存。
您还可以使用声明配置，通过 Data Grid Operator 为 OpenShift 上运行的集群创建缓存。
简单性
保留独立于编程语言的标记语言。
例如，创建远程缓存通常最好不要直接向 Java 代码添加复杂的 XML。
注意

Data Grid 服务器配置扩展了 infinispan.xml，使其包含集群传输机制、安全域和端点配置。如果您将缓存声明为 Data Grid Server 配置的一部分，您应该使用管理工具，如 Ansible 或 Chef，使其在集群中同步。

要在 Data Grid 集群中动态同步远程缓存，请在运行时创建它们。

3.1.1. 缓存配置

您可以使用 XML、JSON 和 YAML 格式创建声明性缓存配置。

所有声明缓存都必须符合 Data Grid 模式。JSON 格式的配置必须遵循 XML 配置的结构，元素对应于字段和属性。

重要

Data Grid 将字符限制为最多 255 个缓存名称或缓存模板名称。如果您超过这个字符限制，Data Grid 会抛出异常。编写 succinct 缓存名称和缓存模板名称。

重要

文件系统可能会为文件名长度设置限制，因此请确保缓存的名称不超过这个限制。如果缓存名称超过文件系统的命名限制，则对该缓存的一般操作或初始操作可能会失败。写入 succinct 文件名。

分布式缓存

XML

<distributed-cache owners="2"
                   segments="256"
                   capacity-factor="1.0"
                   l1-lifespan="5000"
                   mode="SYNC"
                   statistics="true">
  <encoding media-type="application/x-protostream"/>
  <locking isolation="REPEATABLE_READ"/>
  <transaction mode="FULL_XA"
               locking="OPTIMISTIC"/>
  <expiration lifespan="5000"
              max-idle="1000" />
  <memory max-count="1000000"
          when-full="REMOVE"/>
  <indexing enabled="true"
            storage="local-heap">
    <index-reader refresh-interval="1000"/>
    <indexed-entities>
      <indexed-entity>org.infinispan.Person</indexed-entity>
    </indexed-entities>
  </indexing>
  <partition-handling when-split="ALLOW_READ_WRITES"
                      merge-policy="PREFERRED_NON_NULL"/>
  <persistence passivation="false">
    <!-- Persistent storage configuration. -->
  </persistence>
</distributed-cache>

JSON

{
  "distributed-cache": {
    "mode": "SYNC",
    "owners": "2",
    "segments": "256",
    "capacity-factor": "1.0",
    "l1-lifespan": "5000",
    "statistics": "true",
    "encoding": {
      "media-type": "application/x-protostream"
    },
    "locking": {
      "isolation": "REPEATABLE_READ"
    },
    "transaction": {
      "mode": "FULL_XA",
      "locking": "OPTIMISTIC"
    },
    "expiration" : {
      "lifespan" : "5000",
      "max-idle" : "1000"
    },
    "memory": {
      "max-count": "1000000",
      "when-full": "REMOVE"
    },
    "indexing" : {
          "enabled" : true,
          "storage" : "local-heap",
          "index-reader" : {
            "refresh-interval" : "1000"
          },
          "indexed-entities": [
            "org.infinispan.Person"
          ]
    },
    "partition-handling" : {
      "when-split" : "ALLOW_READ_WRITES",
      "merge-policy" : "PREFERRED_NON_NULL"
    },
    "persistence" : {
      "passivation" : false
    }
  }
}

YAML

distributedCache:
  mode: "SYNC"
  owners: "2"
  segments: "256"
  capacityFactor: "1.0"
  l1Lifespan: "5000"
  statistics: "true"
  encoding:
    mediaType: "application/x-protostream"
  locking:
    isolation: "REPEATABLE_READ"
  transaction:
    mode: "FULL_XA"
    locking: "OPTIMISTIC"
  expiration:
    lifespan: "5000"
    maxIdle: "1000"
  memory:
    maxCount: "1000000"
    whenFull: "REMOVE"
  indexing:
    enabled: "true"
    storage: "local-heap"
    indexReader:
      refreshInterval: "1000"
    indexedEntities:
      - "org.infinispan.Person"
  partitionHandling:
    whenSplit: "ALLOW_READ_WRITES"
    mergePolicy: "PREFERRED_NON_NULL"
  persistence:
    passivation: "false"
    # Persistent storage configuration.

复制的缓存

XML

<replicated-cache segments="256"
                  mode="SYNC"
                  statistics="true">
  <encoding media-type="application/x-protostream"/>
  <locking isolation="REPEATABLE_READ"/>
  <transaction mode="FULL_XA"
               locking="OPTIMISTIC"/>
  <expiration lifespan="5000"
              max-idle="1000" />
  <memory max-count="1000000"
          when-full="REMOVE"/>
  <indexing enabled="true"
            storage="local-heap">
    <index-reader refresh-interval="1000"/>
    <indexed-entities>
      <indexed-entity>org.infinispan.Person</indexed-entity>
    </indexed-entities>
  </indexing>
  <partition-handling when-split="ALLOW_READ_WRITES"
                      merge-policy="PREFERRED_NON_NULL"/>
  <persistence passivation="false">
    <!-- Persistent storage configuration. -->
  </persistence>
</replicated-cache>

JSON

{
  "replicated-cache": {
    "mode": "SYNC",
    "segments": "256",
    "statistics": "true",
    "encoding": {
      "media-type": "application/x-protostream"
    },
    "locking": {
      "isolation": "REPEATABLE_READ"
    },
    "transaction": {
      "mode": "FULL_XA",
      "locking": "OPTIMISTIC"
    },
    "expiration" : {
      "lifespan" : "5000",
      "max-idle" : "1000"
    },
    "memory": {
      "max-count": "1000000",
      "when-full": "REMOVE"
    },
    "indexing" : {
      "enabled" : true,
      "storage" : "local-heap",
      "index-reader" : {
        "refresh-interval" : "1000"
        },
      "indexed-entities": [
        "org.infinispan.Person"
      ]
    },
    "partition-handling" : {
      "when-split" : "ALLOW_READ_WRITES",
      "merge-policy" : "PREFERRED_NON_NULL"
    },
    "persistence" : {
      "passivation" : false
    }
  }
}

YAML

replicatedCache:
  mode: "SYNC"
  segments: "256"
  statistics: "true"
  encoding:
    mediaType: "application/x-protostream"
  locking:
    isolation: "REPEATABLE_READ"
  transaction:
    mode: "FULL_XA"
    locking: "OPTIMISTIC"
  expiration:
    lifespan: "5000"
    maxIdle: "1000"
  memory:
    maxCount: "1000000"
    whenFull: "REMOVE"
  indexing:
    enabled: "true"
    storage: "local-heap"
    indexReader:
      refreshInterval: "1000"
    indexedEntities:
      - "org.infinispan.Person"
  partitionHandling:
    whenSplit: "ALLOW_READ_WRITES"
    mergePolicy: "PREFERRED_NON_NULL"
  persistence:
    passivation: "false"
    # Persistent storage configuration.

多个缓存

XML

<infinispan
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="urn:infinispan:config:15.0 https://infinispan.org/schemas/infinispan-config-15.0.xsd
                          urn:infinispan:server:15.0 https://infinispan.org/schemas/infinispan-server-15.0.xsd"
      xmlns="urn:infinispan:config:15.0"
      xmlns:server="urn:infinispan:server:15.0">
  <cache-container name="default"
                   statistics="true">
    <distributed-cache name="mycacheone"
                       mode="ASYNC"
                       statistics="true">
      <encoding media-type="application/x-protostream"/>
      <expiration lifespan="300000"/>
      <memory max-size="400MB"
              when-full="REMOVE"/>
    </distributed-cache>
    <distributed-cache name="mycachetwo"
                       mode="SYNC"
                       statistics="true">
      <encoding media-type="application/x-protostream"/>
      <expiration lifespan="300000"/>
      <memory max-size="400MB"
              when-full="REMOVE"/>
    </distributed-cache>
  </cache-container>
</infinispan>

JSON

{
  "infinispan" : {
    "cache-container" : {
      "name" : "default",
      "statistics" : "true",
      "caches" : {
        "mycacheone" : {
          "distributed-cache" : {
            "mode": "ASYNC",
            "statistics": "true",
            "encoding": {
              "media-type": "application/x-protostream"
            },
            "expiration" : {
              "lifespan" : "300000"
            },
            "memory": {
              "max-size": "400MB",
              "when-full": "REMOVE"
            }
          }
        },
        "mycachetwo" : {
          "distributed-cache" : {
            "mode": "SYNC",
            "statistics": "true",
            "encoding": {
              "media-type": "application/x-protostream"
            },
            "expiration" : {
              "lifespan" : "300000"
            },
            "memory": {
              "max-size": "400MB",
              "when-full": "REMOVE"
            }
          }
        }
      }
    }
  }
}

YAML

infinispan:
  cacheContainer:
    name: "default"
    statistics: "true"
    caches:
      mycacheone:
       distributedCache:
          mode: "ASYNC"
          statistics: "true"
          encoding:
            mediaType: "application/x-protostream"
          expiration:
            lifespan: "300000"
          memory:
            maxSize: "400MB"
            whenFull: "REMOVE"
      mycachetwo:
        distributedCache:
          mode: "SYNC"
          statistics: "true"
          encoding:
            mediaType: "application/x-protostream"
          expiration:
            lifespan: "300000"
          memory:
            maxSize: "400MB"
            whenFull: "REMOVE"

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