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+# PIP-362: Add admin APIs for batch updating and deleting bookie rack information
+
+# Background knowledge
+
+Each time the rack information of a bookie is updated or deleted, the mapping information of the bookie rack
+will be updated in `/bookies` on Zookeeper. At the same time, all bookies observing this path will be
+notified to fetch the latest bookie rack mapping information from Zookeeper.
+
+# Motivation
+
+Currently, we only provide single update or delete admin APIs for bookie rack information (`updateBookieRackInfo` 
+and `deleteBookieRackInfo`). If we want to update the rack information for n bookies, we need to call 
+`updateBookieRackInfo` n times, which will result in a large number of write and read operations on Zookeeper,
+thereby affecting Zookeeper's stability.
+
+Therefore, we want to introduce admin APIs for batch updating and deleting bookie rack information to reduce
+the number of times Zookeeper is accessed when batch setting bookie rack information.
+
+# Goals
+
+## In Scope
+
+Add admin APIs for batch updating and deleting bookie rack information.
+
+# High Level Design
+
+Add admin APIs for batch updating and deleting bookie rack information.
+
+# Detailed Design
+
+## Design & Implementation Details
+
+Add admin APIs for batch updating and deleting bookie rack information.
+
+## Public-facing Changes
+
+### Public API
+org.apache.pulsar.common.policies.data.ExtBookieInfo
+```java
+public interface ExtBookieInfo {
+    String getAddress();
+    String getGroup();
+    String getRack();
+    String getHostname();
+
+    interface Builder {
+        Builder address(String address);
+        Builder group(String group);
+        Builder rack(String rack);
+        Builder hostname(String hostname);
+        ExtBookieInfo build();
+    }
+
+    static Builder builder() {
+        return ExtBookieInfoImpl.builder();
+    }
+}
+```
+
+org.apache.pulsar.common.policies.data.impl.ExtBookieInfoImpl
+```java
+/**
+ * Ext Bookie information.
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public final class ExtBookieInfoImpl implements ExtBookieInfo {
+    private String address;
+    private String group;
+    private String rack;
+    private String hostname;
+
+    public static ExtBookieInfoImplBuilder builder() {
+        return new ExtBookieInfoImplBuilder();
+    }
+
+    public static class ExtBookieInfoImplBuilder implements ExtBookieInfo.Builder {
+        private String address;
+        private String group;
+        private String rack;
+        private String hostname;
+        private static final String PATH_SEPARATOR = "/";
+
+        public ExtBookieInfoImplBuilder address(String address) {
+            this.address = address;
+            return this;
+        }
+
+        public ExtBookieInfoImplBuilder group(String group) {
+            this.group = group;
+            return this;
+        }
+
+        public ExtBookieInfoImplBuilder rack(String rack) {
+            this.rack = rack;
+            return this;
+        }
+
+        public ExtBookieInfoImplBuilder hostname(String hostname) {
+            this.hostname = hostname;
+            return this;
+        }
+
+        public ExtBookieInfoImpl build() {
+            checkArgument(rack != null && !rack.isEmpty() && !rack.equals(PATH_SEPARATOR),
+                    "rack name is invalid, it should not be null, empty or '/'");
+            return new ExtBookieInfoImpl(address, group, rack, hostname);
+        }
+
+        public static void checkArgument(boolean expression, @NonNull Object errorMessage) {
+            if (!expression) {
+                throw new IllegalArgumentException(String.valueOf(errorMessage));
+            }
+        }
+    }
+}
+```
+
+V2/Namespaces.java
+```java
+@DELETE
+@Path("/racks-info")
+@ApiOperation(
+        value = "Removed the rack placement information for a batch of bookies in the cluster",
+        notes = "If the 'deleteAll' parameter is set to true, it will remove the rack placement "
+                + "information for all bookies in the cluster, ignoring the 'bookieAddresses' parameter"
+)
+@ApiResponses(value = {
+        @ApiResponse(code = 204, message = "Operation successful"),
+        @ApiResponse(code = 403, message = "Don't have admin permission")
+})
+public void batchDeleteBookiesRackInfo(@Suspended final AsyncResponse asyncResponse,
+                                       @ApiParam(value = "List of bookie addresses")
+                                       @QueryParam("bookieAddresses") List<String> bookieAddresses,
+                                       @ApiParam(value = "Whether to delete all bookies rack info",
+                                               defaultValue = "false")
+                                       @QueryParam("deleteAll") @DefaultValue("false")
+                                       boolean deleteAll) throws Exception {
+    ...
+}
+
+@POST
+@Path("/racks-info")
+@ApiOperation(value = "Updates the rack placement information for a batch of bookies in the cluster")
+@ApiResponses(value = {
+        @ApiResponse(code = 204, message = "Operation successful"),
+        @ApiResponse(code = 403, message = "Don't have admin permission")}
+)
+public void batchUpdateBookiesRackInfo(@Suspended final AsyncResponse asyncResponse,
+                                       @ApiParam(value = "List of bookie info", required = true)
+                                       List<ExtBookieInfo> extBookieInfos) throws Exception {
+    ...
+}
+```
+
+Client
+```java
+/**
+ * Remove rack placement information for a batch of bookies in the cluster.
+ */
+void batchDeleteBookiesRackInfo(List<String> bookieAddresses) throws PulsarAdminException;
+
+/**
+ * Remove rack placement information for a batch of bookies in the cluster asynchronously.
+ */
+CompletableFuture<Void> batchDeleteBookiesRackInfoAsync(List<String> bookieAddresses);
+
+/**
+ * Clears the rack placement information for all bookies int the cluster.
+ */
+void clearAllBookiesRackInfo() throws PulsarAdminException;
+
+/**
+ * Clears the rack placement information for all bookies int the cluster asynchronously.
+ */
+CompletableFuture<Void> clearAllBookiesRackInfoAsync();
+
+/**
+ * Updates the rack placement information for a batch of bookies in the cluster.
+ */
+void batchUpdateBookiesRackInfo(List<ExtBookieInfo> extBookieInfos) throws PulsarAdminException;
+
+/**
+ * Updates the rack placement information for a batch of bookies in the cluster asynchronously.
+ */
+CompletableFuture<Void> batchUpdateBookiesRackInfoAsync(List<ExtBookieInfo> extBookieInfos);
+```
+
+### Binary protocol
+
+### Configuration
+
+### CLI
+
+### Metrics
+
+# Monitoring
+
+# Security Considerations
+
+# Backward & Forward Compatibility
+
+## Revert
+
+## Upgrade
+
+# Alternatives
+
+# General Notes
+
+# Links
+
+<!--
+Updated afterwards
+-->
+* Mailing List discussion thread:
+* Mailing List voting thread: