Managing Namespaces

Pulsar 的命名空间是 topic 的逻辑分组。

命名空间的管理方式：

命名空间资源

创建

可以在给定的租户下创建命名空间。

pulsar-admin

REST API

Java

使用 create 命令，指定命名空间的名称：

  1. $ pulsar-admin namespaces create test-tenant/test-namespace

PUT /admin/v2/namespaces/:tenant/:namespace

  1. admin.namespaces().createNamespace(namespace);

获取策略

用户可以随时获取与命名空间相关的现有策略。

pulsar-admin

REST API

Java

使用 policies 子命令，指定命名空间：

  1. $ pulsar-admin namespaces policies test-tenant/test-namespace{  "auth_policies": {    "namespace_auth": {},    "destination_auth": {}  },  "replication_clusters": [],  "bundles_activated": true,  "bundles": {    "boundaries": [      "0x00000000",      "0xffffffff"    ],    "numBundles": 1  },  "backlog_quota_map": {},  "persistence": null,  "latency_stats_sample_rate": {},  "message_ttl_in_seconds": 0,  "retention_policies": null,  "deleted": false}

GET /admin/v2/namespaces/:tenant/:namespace

  1. admin.namespaces().getPolicies(namespace);

列出租户下的命名空间

给定 Pulsar 租户，可以列出其中所有的命名空间。

pulsar-admin

REST API

Java

使用 list 子命令，指定租户：

  1. $ pulsar-admin namespaces list test-tenanttest-tenant/ns1test-tenant/ns2

GET /admin/v2/namespaces/:tenant

  1. admin.namespaces().getNamespaces(tenant);

删除

可以删除租户下已经存在的命名空间。

pulsar-admin

REST API

Java

使用 delete 子命令，指定命名空间：

  1. $ pulsar-admin namespaces delete test-tenant/ns1

DELETE /admin/v2/namespaces/:tenant/:namespace

  1. admin.namespaces().deleteNamespace(namespace);

Set replication cluster

为命名空间设置复制集群，因此 Pulsar 可以从一个 colo 复制消息到另一个 colo。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-clusters test-tenant/ns1 \  --clusters cl1
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/replication|operation/setNamespaceReplicationClusters?version=[[pulsar:version_number]]}
  1. admin.namespaces().setNamespaceReplicationClusters(namespace, clusters);

Get replication cluster

获取给定命名空间复制集群的列表。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-clusters test-tenant/cl1/ns1
  1. cl2
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/replication|operation/getNamespaceReplicationClusters?version=[[pulsar:version_number]]}
  1. admin.namespaces().getNamespaceReplicationClusters(namespace)

Set backlog quota policies

Backlog quota helps the broker to restrict bandwidth/storage of a namespace once it reaches a certain threshold limit. Admin can set the limit and take corresponding action after the limit is reached.

  1. producer_request_hold：broker 暂停运行，并不再持久化生产请求负载

  2. producer_exception: broker disconnects with the client by giving an exception.

  3. consumer_backlog_eviction：broker 丢弃积压消息

可以通过定义 backlog-quota-type: destination_storage 来限制积压配额

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-backlog-quota --limit 10 --policy producer_request_hold test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/backlogQuota|operation/setBacklogQuota?version=[[pulsar:version_number]]}
  1. admin.namespaces().setBacklogQuota(namespace, new BacklogQuota(limit, policy))

Get backlog quota policies

查看给定命名空间已配置的积压配额。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-backlog-quotas test-tenant/ns1
  1. {  "destination_storage": {    "limit": 10,    "policy": "producer_request_hold"  }}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/backlogQuotaMap|operation/getBacklogQuotaMap?version=[[pulsar:version_number]]}
  1. admin.namespaces().getBacklogQuotaMap(namespace);

Remove backlog quota policies

移除指定命名空间的积压配额策略

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces remove-backlog-quota test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|DELETE|/admin/v2/namespaces/:tenant/:namespace/backlogQuota|operation/removeBacklogQuota?version=[[pulsar:version_number]]}
  1. admin.namespaces().removeBacklogQuota(namespace, backlogQuotaType)

设置持久化策略

持久化策略可以为给定命名空间下 topic 上的所有消息配置持久等级。

  • Bookkeeper-ack-quorum：每个 entry 在等待的 acks（有保证的副本）数量，默认值：0

  • Bookkeeper-ensemble：单个 topic 使用的 bookie 数量，默认值：0

  • Bookkeeper-write-quorum：每个 entry 要写入的次数，默认值：0

  • Ml-mark-delete-max-rate：标记-删除操作的限制速率（0表示无限制），默认值：0.0

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-persistence --bookkeeper-ack-quorum 2 --bookkeeper-ensemble 3 --bookkeeper-write-quorum 2 --ml-mark-delete-max-rate 0 test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/persistence|operation/setPersistence?version=[[pulsar:version_number]]}
  1. admin.namespaces().setPersistence(namespace,new PersistencePolicies(bookkeeperEnsemble, bookkeeperWriteQuorum,bookkeeperAckQuorum,managedLedgerMaxMarkDeleteRate))

Get persistence policies

It shows the configured persistence policies of a given namespace.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-persistence test-tenant/ns1
  1. {  "bookkeeperEnsemble": 3,  "bookkeeperWriteQuorum": 2,  "bookkeeperAckQuorum": 2,  "managedLedgerMaxMarkDeleteRate": 0}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/persistence|operation/getPersistence?version=[[pulsar:version_number]]}
  1. admin.namespaces().getPersistence(namespace)

Unload namespace bundle

The namespace bundle is a virtual group of topics which belong to the same namespace. If the broker gets overloaded with the number of bundles, this command can help unload a bundle from that broker, so it can be served by some other less-loaded brokers. The namespace bundle ID ranges from 0x00000000 to 0xffffffff.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces unload --bundle 0x00000000_0xffffffff test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|PUT|/admin/v2/namespaces/:tenant/:namespace/{bundle}/unload|operation/unloadNamespaceBundle?version=[[pulsar:version_number]]}
  1. admin.namespaces().unloadNamespaceBundle(namespace, bundle)

Set message-ttl

配置消息存活时间 (以秒为单位)。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-message-ttl --messageTTL 100 test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/messageTTL|operation/setNamespaceMessageTTL?version=[[pulsar:version_number]]}
  1. admin.namespaces().setNamespaceMessageTTL(namespace, messageTTL)

Get message-ttl

获取命名空间中消息的存活时间（ttl）。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-message-ttl test-tenant/ns1
  1. 100
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/messageTTL|operation/getNamespaceMessageTTL?version=[[pulsar:version_number]]}
  1. admin.namespaces().getNamespaceMessageTTL(namespace)

Remove message-ttl

Remove a message TTL of the configured namespace.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces remove-message-ttl test-tenant/ns1
  1. 100
  1. {@inject: endpoint|DELETE|/admin/v2/namespaces/:tenant/:namespace/messageTTL|operation/removeNamespaceMessageTTL?version=[[pulsar:version_number]]}
  1. admin.namespaces().removeNamespaceMessageTTL(namespace)

Split bundle

命名空间包可以包含多个 topic，但只能由一个 broker 来提供服务。 If a single bundle is creating an excessive load on a broker, an admin splits the bundle using this command permitting one or more of the new bundles to be unloaded thus spreading the load across the brokers.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces split-bundle --bundle 0x00000000_0xffffffff test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|PUT|/admin/v2/namespaces/:tenant/:namespace/{bundle}/split|operation/splitNamespaceBundle?version=[[pulsar:version_number]]}
  1. admin.namespaces().splitNamespaceBundle(namespace, bundle)

清除 backlog

It clears all message backlog for all the topics that belong to a specific namespace. You can also clear backlog for a specific subscription as well.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces clear-backlog --sub my-subscription test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/clearBacklog|operation/clearNamespaceBacklogForSubscription?version=[[pulsar:version_number]]}
  1. admin.namespaces().clearNamespaceBacklogForSubscription(namespace, subscription)

Clear bundle backlog

It clears all message backlog for all the topics that belong to a specific NamespaceBundle. You can also clear backlog for a specific subscription as well.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces clear-backlog  --bundle 0x00000000_0xffffffff  --sub my-subscription test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/{bundle}/clearBacklog|operation/clearNamespaceBundleBacklogForSubscriptio?version=[[pulsar:version_number]]n}
  1. admin.namespaces().clearNamespaceBundleBacklogForSubscription(namespace, bundle, subscription)

Set retention

Each namespace contains multiple topics and the retention size (storage size) of each topic should not exceed a specific threshold or it should be stored for a certain period. This command helps configure the retention size and time of topics in a given namespace.

pulsar-admin

REST API

Java

  1. $ pulsar-admin set-retention --size 10 --time 100 test-tenant/ns1
  1. N/A
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/retention|operation/setRetention?version=[[pulsar:version_number]]}
  1. admin.namespaces().setRetention(namespace, new RetentionPolicies(retentionTimeInMin, retentionSizeInMB))

Get retention

获取指定命名空间的保留参数信息。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-retention test-tenant/ns1
  1. {  "retentionTimeInMinutes": 10,  "retentionSizeInMB": 100}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/retention|operation/getRetention?version=[[pulsar:version_number]]}
  1. admin.namespaces().getRetention(namespace)

Set dispatch throttling

为给定命名空间下所有 topic 设置消息派发速率。 The dispatch rate can be restricted by the number of messages per X seconds (msg-dispatch-rate) or by the number of message-bytes per X second (byte-dispatch-rate). 派发速率指每秒派发的消息数，可通过 dispatch-rate-period 来配置。 msg-dispatch-rate 和 byte-dispatch-rate 的默认值均为 -1，即禁用配额限制。

Note - If neither clusterDispatchRate nor topicDispatchRate is configured, dispatch throttling is disabled.

  • If topicDispatchRate is not configured, clusterDispatchRate takes effect. - If topicDispatchRate is configured, topicDispatchRate takes effect.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-dispatch-rate test-tenant/ns1 \  --msg-dispatch-rate 1000 \  --byte-dispatch-rate 1048576 \  --dispatch-rate-period 1
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/dispatchRate|operation/setDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().setDispatchRate(namespace, new DispatchRate(1000, 1048576, 1))

Get configured message-rate

获取命名空间中已配置的消息派发速率（该命名空间下 topic 发送消息数 / 秒）

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-dispatch-rate test-tenant/ns1
  1. {  "dispatchThrottlingRatePerTopicInMsg" : 1000,  "dispatchThrottlingRatePerTopicInByte" : 1048576,  "ratePeriodInSecond" : 1}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/dispatchRate|operation/getDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().getDispatchRate(namespace)

Set dispatch throttling for subscription

为给定命名空间下 topic 中的所有订阅设置消息派发速率。 The dispatch rate can be restricted by the number of messages per X seconds (msg-dispatch-rate) or by the number of message-bytes per X second (byte-dispatch-rate). 派发速率指每秒派发的消息数，可通过 dispatch-rate-period 来配置。 msg-dispatch-rate 和 byte-dispatch-rate 的默认值均为 -1，即禁用配额限制。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-subscription-dispatch-rate test-tenant/ns1 \  --msg-dispatch-rate 1000 \  --byte-dispatch-rate 1048576 \  --dispatch-rate-period 1
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/subscriptionDispatchRate|operation/setDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().setSubscriptionDispatchRate(namespace, new DispatchRate(1000, 1048576, 1))

Get configured message-rate

获取命名空间中已配置的消息派发速率（该命名空间下 topic 发送消息数 / 秒）

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-subscription-dispatch-rate test-tenant/ns1
  1. {  "dispatchThrottlingRatePerTopicInMsg" : 1000,  "dispatchThrottlingRatePerTopicInByte" : 1048576,  "ratePeriodInSecond" : 1}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/subscriptionDispatchRate|operation/getDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().getSubscriptionDispatchRate(namespace)

Set dispatch throttling for replicator

为给定命名空间下复制集群之间的所有复制器设置消息派发速率。 The dispatch rate can be restricted by the number of messages per X seconds (msg-dispatch-rate) or by the number of message-bytes per X second (byte-dispatch-rate). 派发速率指每秒派发的消息数，可通过 dispatch-rate-period 来配置。 msg-dispatch-rate 和 byte-dispatch-rate 的默认值均为 -1，即禁用配额限制。

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-replicator-dispatch-rate test-tenant/ns1 \  --msg-dispatch-rate 1000 \  --byte-dispatch-rate 1048576 \  --dispatch-rate-period 1
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/replicatorDispatchRate|operation/setDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().setReplicatorDispatchRate(namespace, new DispatchRate(1000, 1048576, 1))

Get configured message-rate

获取命名空间中已配置的消息派发速率（该命名空间下 topic 发送消息数 / 秒）

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-replicator-dispatch-rate test-tenant/ns1
  1. {  "dispatchThrottlingRatePerTopicInMsg" : 1000,  "dispatchThrottlingRatePerTopicInByte" : 1048576,  "ratePeriodInSecond" : 1}
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/replicatorDispatchRate|operation/getDispatchRate?version=[[pulsar:version_number]]}
  1. admin.namespaces().getReplicatorDispatchRate(namespace)

Get deduplication snapshot interval

It shows configured deduplicationSnapshotInterval for a namespace (Each topic under the namespace will take a deduplication snapshot according to this interval)

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces get-deduplication-snapshot-interval test-tenant/ns1
  1. {@inject: endpoint|GET|/admin/v2/namespaces/:tenant/:namespace/deduplicationSnapshotInterval?version=[[pulsar:version_number]]}
  1. admin.namespaces().getDeduplicationSnapshotInterval(namespace)

Set deduplication snapshot interval

Set configured deduplicationSnapshotInterval for a namespace. Each topic under the namespace will take a deduplication snapshot according to this interval. brokerDeduplicationEnabled must be set to true for this property to take effect.

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces set-deduplication-snapshot-interval test-tenant/ns1 --interval 1000
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/deduplicationSnapshotInterval?version=[[pulsar:version_number]]}
  1. {  "interval": 1000}
  1. admin.namespaces().setDeduplicationSnapshotInterval(namespace, 1000)

Remove deduplication snapshot interval

Remove configured deduplicationSnapshotInterval of a namespace (Each topic under the namespace will take a deduplication snapshot according to this interval)

pulsar-admin

REST API

Java

  1. $ pulsar-admin namespaces remove-deduplication-snapshot-interval test-tenant/ns1
  1. {@inject: endpoint|POST|/admin/v2/namespaces/:tenant/:namespace/deduplicationSnapshotInterval?version=[[pulsar:version_number]]}
  1. admin.namespaces().removeDeduplicationSnapshotInterval(namespace)

命名空间隔离

敬请期待。

从 broker上卸载命名空间

你能从这Pulsar broker 管理上卸载一个命名空间，或一个 命名空间包。

pulsar-admin

Use the unload subcommand of the namespaces command.

pulsar-admin

REST

Java

  1. $ pulsar-admin namespaces unload my-tenant/my-ns
  1. {@inject: endpoint|PUT|/admin/v2/namespaces/:tenant/:namespace/unload|operation/unloadNamespace?version=[[pulsar:version_number]]}
  1. admin.namespaces().unload(namespace)