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Posted to server-dev@james.apache.org by bt...@apache.org on 2017/08/22 03:32:00 UTC

[5/9] james-project git commit: JAMES-2111 Drop V1 -> V2 configuration options

JAMES-2111 Drop V1 -> V2 configuration options


Project: http://git-wip-us.apache.org/repos/asf/james-project/repo
Commit: http://git-wip-us.apache.org/repos/asf/james-project/commit/51a1311f
Tree: http://git-wip-us.apache.org/repos/asf/james-project/tree/51a1311f
Diff: http://git-wip-us.apache.org/repos/asf/james-project/diff/51a1311f

Branch: refs/heads/master
Commit: 51a1311ffb06f684feb62aea7acc51f5a589189f
Parents: 4e0f131
Author: benwa <bt...@linagora.com>
Authored: Tue Aug 15 15:50:39 2017 +0700
Committer: benwa <bt...@linagora.com>
Committed: Tue Aug 22 10:31:07 2017 +0700

----------------------------------------------------------------------
 .../cassandra/CassandraConfiguration.java       | 97 +-------------------
 .../cassandra/CassandraConfigurationTest.java   | 60 ------------
 .../destination/conf/cassandra.properties       |  3 -
 .../destination/conf/cassandra.properties       |  3 -
 .../modules/mailbox/CassandraSessionModule.java | 12 ---
 .../mailbox/CassandraSessionModuleTest.java     |  4 -
 .../modules/mailbox/cassandra.properties        |  4 -
 src/site/xdoc/server/config-cassandra.xml       |  8 +-
 8 files changed, 8 insertions(+), 183 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/backends-common/cassandra/src/main/java/org/apache/james/backends/cassandra/CassandraConfiguration.java
----------------------------------------------------------------------
diff --git a/backends-common/cassandra/src/main/java/org/apache/james/backends/cassandra/CassandraConfiguration.java b/backends-common/cassandra/src/main/java/org/apache/james/backends/cassandra/CassandraConfiguration.java
index 5de74a4..f976242 100644
--- a/backends-common/cassandra/src/main/java/org/apache/james/backends/cassandra/CassandraConfiguration.java
+++ b/backends-common/cassandra/src/main/java/org/apache/james/backends/cassandra/CassandraConfiguration.java
@@ -38,11 +38,7 @@ public class CassandraConfiguration {
     public static final int DEFAULT_UID_MAX_RETRY = 100000;
     public static final int DEFAULT_ACL_MAX_RETRY = 1000;
     public static final int DEFAULT_FETCH_NEXT_PAGE_ADVANCE_IN_ROW = 100;
-    public static final boolean DEFAULT_ON_THE_FLY_MIGRATION_V1_TO_V2 = false;
     public static final int DEFAULT_BLOB_PART_SIZE = 100 * 1024;
-    public static final int DEFAULT_MIGRATION_V1_TO_V2_QUEUE_LENGTH = 1000;
-    public static final int DEFAULT_MIGRATION_V1_TO_V2_THREAD_COUNT = 2;
-    public static final int DEFAULT_MIGRATION_V1_READ_FETCH_SIZE = 10;
 
     public static class Builder {
         private Optional<Integer> messageReadChunkSize = Optional.empty();
@@ -55,10 +51,6 @@ public class CassandraConfiguration {
         private Optional<Integer> aclMaxRetry = Optional.empty();
         private Optional<Integer> fetchNextPageInAdvanceRow = Optional.empty();
         private Optional<Integer> blobPartSize = Optional.empty();
-        private Optional<Boolean> onTheFlyV1ToV2Migration = Optional.empty();
-        private Optional<Integer> v1ToV2QueueLength = Optional.empty();
-        private Optional<Integer> v1ToV2ThreadCount = Optional.empty();
-        private Optional<Integer> v1ReadFetchSize = Optional.empty();
 
         public Builder messageReadChunkSize(int value) {
             Preconditions.checkArgument(value > 0, "messageReadChunkSize needs to be strictly positive");
@@ -120,29 +112,6 @@ public class CassandraConfiguration {
             return this;
         }
 
-        public Builder v1ToV2QueueLength(int value) {
-            Preconditions.checkArgument(value > 0, "v1ToV2QueueLength needs to be strictly positive");
-            this.v1ToV2QueueLength = Optional.of(value);
-            return this;
-        }
-
-        public Builder v1ToV2ThreadCount(int value) {
-            Preconditions.checkArgument(value > 0, "v1ToV2ThreadCount needs to be strictly positive");
-            this.v1ToV2ThreadCount = Optional.of(value);
-            return this;
-        }
-
-        public Builder v1ReadFetchSize(int value) {
-            Preconditions.checkArgument(value > 0, "v1ReadFetchSize needs to be strictly positive");
-            this.v1ReadFetchSize = Optional.of(value);
-            return this;
-        }
-
-        public Builder onTheFlyV1ToV2Migration(boolean value) {
-            this.onTheFlyV1ToV2Migration = Optional.of(value);
-            return this;
-        }
-
         public Builder messageReadChunkSize(Optional<Integer> value) {
             value.ifPresent(this::messageReadChunkSize);
             return this;
@@ -193,26 +162,6 @@ public class CassandraConfiguration {
             return this;
         }
 
-        public Builder onTheFlyV1ToV2Migration(Optional<Boolean> value) {
-            value.ifPresent(this::onTheFlyV1ToV2Migration);
-            return this;
-        }
-
-        public Builder v1ToV2QueueLength(Optional<Integer> value) {
-            value.ifPresent(this::v1ToV2QueueLength);
-            return this;
-        }
-
-        public Builder v1ToV2ThreadCount(Optional<Integer> value) {
-            value.ifPresent(this::v1ToV2ThreadCount);
-            return this;
-        }
-
-        public Builder v1ReadFetchSize(Optional<Integer> value) {
-            value.ifPresent(this::v1ReadFetchSize);
-            return this;
-        }
-
         public CassandraConfiguration build() {
             return new CassandraConfiguration(aclMaxRetry.orElse(DEFAULT_ACL_MAX_RETRY),
                 messageReadChunkSize.orElse(DEFAULT_MESSAGE_CHUNK_SIZE_ON_READ),
@@ -223,11 +172,7 @@ public class CassandraConfiguration {
                 modSeqMaxRetry.orElse(DEFAULT_MODSEQ_MAX_RETRY),
                 uidMaxRetry.orElse(DEFAULT_UID_MAX_RETRY),
                 fetchNextPageInAdvanceRow.orElse(DEFAULT_FETCH_NEXT_PAGE_ADVANCE_IN_ROW),
-                blobPartSize.orElse(DEFAULT_BLOB_PART_SIZE),
-                onTheFlyV1ToV2Migration.orElse(DEFAULT_ON_THE_FLY_MIGRATION_V1_TO_V2),
-                v1ToV2QueueLength.orElse(DEFAULT_MIGRATION_V1_TO_V2_QUEUE_LENGTH),
-                v1ToV2ThreadCount.orElse(DEFAULT_MIGRATION_V1_TO_V2_THREAD_COUNT),
-                v1ReadFetchSize.orElse(DEFAULT_MIGRATION_V1_READ_FETCH_SIZE));
+                blobPartSize.orElse(DEFAULT_BLOB_PART_SIZE));
         }
     }
 
@@ -245,18 +190,12 @@ public class CassandraConfiguration {
     private final int aclMaxRetry;
     private final int fetchNextPageInAdvanceRow;
     private final int blobPartSize;
-    private final boolean onTheFlyV1ToV2Migration;
-    private final int v1ToV2QueueLength;
-    private final int v1ToV2ThreadCount;
-    private final int v1ReadFetchSize;
 
     @VisibleForTesting
     CassandraConfiguration(int aclMaxRetry, int messageReadChunkSize, int expungeChunkSize,
                            int flagsUpdateChunkSize, int flagsUpdateMessageIdMaxRetry, int flagsUpdateMessageMaxRetry,
                            int modSeqMaxRetry, int uidMaxRetry, int fetchNextPageInAdvanceRow,
-                           int blobPartSize, boolean onTheFlyV1ToV2Migration, int v1ToV2QueueLength,
-                           int v1ToV2ThreadCount, int v1ReadFetchSize
-    ) {
+                           int blobPartSize) {
         this.aclMaxRetry = aclMaxRetry;
         this.messageReadChunkSize = messageReadChunkSize;
         this.expungeChunkSize = expungeChunkSize;
@@ -267,20 +206,12 @@ public class CassandraConfiguration {
         this.fetchNextPageInAdvanceRow = fetchNextPageInAdvanceRow;
         this.flagsUpdateChunkSize = flagsUpdateChunkSize;
         this.blobPartSize = blobPartSize;
-        this.onTheFlyV1ToV2Migration = onTheFlyV1ToV2Migration;
-        this.v1ToV2QueueLength = v1ToV2QueueLength;
-        this.v1ToV2ThreadCount = v1ToV2ThreadCount;
-        this.v1ReadFetchSize = v1ReadFetchSize;
     }
 
     public int getBlobPartSize() {
         return blobPartSize;
     }
 
-    public boolean isOnTheFlyV1ToV2Migration() {
-        return onTheFlyV1ToV2Migration;
-    }
-
     public int getFlagsUpdateChunkSize() {
         return flagsUpdateChunkSize;
     }
@@ -317,18 +248,6 @@ public class CassandraConfiguration {
         return fetchNextPageInAdvanceRow;
     }
 
-    public int getV1ToV2QueueLength() {
-        return v1ToV2QueueLength;
-    }
-
-    public int getV1ToV2ThreadCount() {
-        return v1ToV2ThreadCount;
-    }
-
-    public int getV1ReadFetchSize() {
-        return v1ReadFetchSize;
-    }
-
     @Override
     public final boolean equals(Object o) {
         if (o instanceof CassandraConfiguration) {
@@ -343,11 +262,7 @@ public class CassandraConfiguration {
                 && Objects.equals(this.uidMaxRetry, that.uidMaxRetry)
                 && Objects.equals(this.flagsUpdateChunkSize, that.flagsUpdateChunkSize)
                 && Objects.equals(this.fetchNextPageInAdvanceRow, that.fetchNextPageInAdvanceRow)
-                && Objects.equals(this.blobPartSize, that.blobPartSize)
-                && Objects.equals(this.onTheFlyV1ToV2Migration, that.onTheFlyV1ToV2Migration)
-                && Objects.equals(this.v1ToV2ThreadCount, that.v1ToV2ThreadCount)
-                && Objects.equals(this.v1ToV2QueueLength, that.v1ToV2QueueLength)
-                && Objects.equals(this.v1ReadFetchSize, that.v1ReadFetchSize);
+                && Objects.equals(this.blobPartSize, that.blobPartSize);
         }
         return false;
     }
@@ -356,7 +271,7 @@ public class CassandraConfiguration {
     public final int hashCode() {
         return Objects.hash(aclMaxRetry, messageReadChunkSize, expungeChunkSize, flagsUpdateMessageIdMaxRetry,
             flagsUpdateMessageMaxRetry, modSeqMaxRetry, uidMaxRetry, fetchNextPageInAdvanceRow, flagsUpdateChunkSize,
-            blobPartSize, onTheFlyV1ToV2Migration, v1ToV2ThreadCount, v1ToV2QueueLength, v1ReadFetchSize);
+            blobPartSize);
     }
 
     @Override
@@ -372,10 +287,6 @@ public class CassandraConfiguration {
             .add("flagsUpdateChunkSize", flagsUpdateChunkSize)
             .add("uidMaxRetry", uidMaxRetry)
             .add("blobPartSize", blobPartSize)
-            .add("onTheFlyV1ToV2Migration", onTheFlyV1ToV2Migration)
-            .add("v1ToV2ThreadCount", v1ToV2ThreadCount)
-            .add("v1ToV2QueueLength", v1ToV2QueueLength)
-            .add("v1ReadFetchSize", v1ReadFetchSize)
             .toString();
     }
 }

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/backends-common/cassandra/src/test/java/org/apache/james/backends/cassandra/CassandraConfigurationTest.java
----------------------------------------------------------------------
diff --git a/backends-common/cassandra/src/test/java/org/apache/james/backends/cassandra/CassandraConfigurationTest.java b/backends-common/cassandra/src/test/java/org/apache/james/backends/cassandra/CassandraConfigurationTest.java
index b38dbf8..9366b13 100644
--- a/backends-common/cassandra/src/test/java/org/apache/james/backends/cassandra/CassandraConfigurationTest.java
+++ b/backends-common/cassandra/src/test/java/org/apache/james/backends/cassandra/CassandraConfigurationTest.java
@@ -192,54 +192,6 @@ public class CassandraConfigurationTest {
     }
 
     @Test
-    public void v1toV2ThreadCountShouldThrowOnZero() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ToV2ThreadCount(0);
-    }
-
-    @Test
-    public void v1toV2ThreadCountShouldThrowOnNegative() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ToV2ThreadCount(-1);
-    }
-
-    @Test
-    public void v1toV2QueueLengthShouldThrowOnZero() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ToV2QueueLength(0);
-    }
-
-    @Test
-    public void v1toV2QueueLengthShouldThrowOnNegative() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ToV2QueueLength(-1);
-    }
-
-    @Test
-    public void v1ReadFetchSizeShouldThrowOnNegative() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ReadFetchSize(-1);
-    }
-
-    @Test
-    public void v1ReadFetchSizeShouldThrowOnZero() {
-        expectedException.expect(IllegalArgumentException.class);
-
-        CassandraConfiguration.builder()
-            .v1ToV2QueueLength(0);
-    }
-
-    @Test
     public void builderShouldCreateTheRightObject() {
         int aclMaxRetry = 1;
         int modSeqMaxRetry = 2;
@@ -251,10 +203,6 @@ public class CassandraConfigurationTest {
         int messageReadChunkSize = 8;
         int expungeChunkSize = 9;
         int blobPartSize = 10;
-        boolean onTheFlyV1ToV2Migration = true;
-        int v1ToV2ThreadCount = 11;
-        int v1ToV2QueueLength = 12;
-        int v1ReadFetchSize = 13;
 
         CassandraConfiguration configuration = CassandraConfiguration.builder()
             .aclMaxRetry(aclMaxRetry)
@@ -267,10 +215,6 @@ public class CassandraConfigurationTest {
             .messageReadChunkSize(messageReadChunkSize)
             .expungeChunkSize(expungeChunkSize)
             .blobPartSize(blobPartSize)
-            .onTheFlyV1ToV2Migration(onTheFlyV1ToV2Migration)
-            .v1ToV2ThreadCount(v1ToV2ThreadCount)
-            .v1ToV2QueueLength(v1ToV2QueueLength)
-            .v1ReadFetchSize(v1ReadFetchSize)
             .build();
 
         softly.assertThat(configuration.getAclMaxRetry()).isEqualTo(aclMaxRetry);
@@ -283,10 +227,6 @@ public class CassandraConfigurationTest {
         softly.assertThat(configuration.getMessageReadChunkSize()).isEqualTo(messageReadChunkSize);
         softly.assertThat(configuration.getExpungeChunkSize()).isEqualTo(expungeChunkSize);
         softly.assertThat(configuration.getBlobPartSize()).isEqualTo(blobPartSize);
-        softly.assertThat(configuration.isOnTheFlyV1ToV2Migration()).isEqualTo(onTheFlyV1ToV2Migration);
-        softly.assertThat(configuration.getV1ToV2ThreadCount()).isEqualTo(v1ToV2ThreadCount);
-        softly.assertThat(configuration.getV1ToV2QueueLength()).isEqualTo(v1ToV2QueueLength);
-        softly.assertThat(configuration.getV1ReadFetchSize()).isEqualTo(v1ReadFetchSize);
     }
 
 }

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/dockerfiles/run/guice/cassandra-ldap/destination/conf/cassandra.properties
----------------------------------------------------------------------
diff --git a/dockerfiles/run/guice/cassandra-ldap/destination/conf/cassandra.properties b/dockerfiles/run/guice/cassandra-ldap/destination/conf/cassandra.properties
index 9a7a175..0ce3a25 100644
--- a/dockerfiles/run/guice/cassandra-ldap/destination/conf/cassandra.properties
+++ b/dockerfiles/run/guice/cassandra-ldap/destination/conf/cassandra.properties
@@ -18,6 +18,3 @@ cassandra.retryConnection.minDelay=5000
 # chunk.size.message.read=100
 # chunk.size.expunge=100
 # mailbox.blob.part.size=102400
-# migration.v1.v2.on.the.fly=false
-# migration.v1.v2.thread.count=2
-# migration.v1.v2.queue.length=1000

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/dockerfiles/run/guice/cassandra/destination/conf/cassandra.properties
----------------------------------------------------------------------
diff --git a/dockerfiles/run/guice/cassandra/destination/conf/cassandra.properties b/dockerfiles/run/guice/cassandra/destination/conf/cassandra.properties
index 61d55de..afc5915 100644
--- a/dockerfiles/run/guice/cassandra/destination/conf/cassandra.properties
+++ b/dockerfiles/run/guice/cassandra/destination/conf/cassandra.properties
@@ -27,6 +27,3 @@ cassandra.retryConnection.minDelay=5000
 # chunk.size.message.read=100
 # chunk.size.expunge=100
 # mailbox.blob.part.size=102400
-# migration.v1.v2.on.the.fly=false
-# migration.v1.v2.thread.count=2
-# migration.v1.v2.queue.length=1000

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/server/container/guice/cassandra-guice/src/main/java/org/apache/james/modules/mailbox/CassandraSessionModule.java
----------------------------------------------------------------------
diff --git a/server/container/guice/cassandra-guice/src/main/java/org/apache/james/modules/mailbox/CassandraSessionModule.java b/server/container/guice/cassandra-guice/src/main/java/org/apache/james/modules/mailbox/CassandraSessionModule.java
index a9447f9..144d5d3 100644
--- a/server/container/guice/cassandra-guice/src/main/java/org/apache/james/modules/mailbox/CassandraSessionModule.java
+++ b/server/container/guice/cassandra-guice/src/main/java/org/apache/james/modules/mailbox/CassandraSessionModule.java
@@ -95,10 +95,6 @@ public class CassandraSessionModule extends AbstractModule {
     private static final String CHUNK_SIZE_MESSAGE_READ = "chunk.size.message.read";
     private static final String CHUNK_SIZE_EXPUNGE = "chunk.size.expunge";
     private static final String BLOB_PART_SIZE = "mailbox.blob.part.size";
-    private static final String MIGRATION_V1_V2_ON_THE_FLY = "migration.v1.v2.on.the.fly";
-    private static final String MIGRATION_V1_V2_THREAD_COUNT = "migration.v1.v2.thread.count";
-    private static final String MIGRATION_V1_V2_QUEUE_LENGTH = "migration.v1.v2.queue.length";
-    public static final String MIGRATION_V1_READ_SIZE = "migration.v1.read.fetch.size";
 
     @Override
     protected void configure() {
@@ -298,14 +294,6 @@ public class CassandraSessionModule extends AbstractModule {
                 propertiesConfiguration.getInteger(CHUNK_SIZE_EXPUNGE, null)))
             .blobPartSize(Optional.ofNullable(
                 propertiesConfiguration.getInteger(BLOB_PART_SIZE, null)))
-            .onTheFlyV1ToV2Migration(Optional.ofNullable(
-                propertiesConfiguration.getBoolean(MIGRATION_V1_V2_ON_THE_FLY, null)))
-            .v1ToV2ThreadCount(Optional.ofNullable(
-                propertiesConfiguration.getInteger(MIGRATION_V1_V2_THREAD_COUNT, null)))
-            .v1ToV2QueueLength(Optional.ofNullable(
-                propertiesConfiguration.getInteger(MIGRATION_V1_V2_QUEUE_LENGTH, null)))
-            .v1ReadFetchSize(Optional.ofNullable(
-                propertiesConfiguration.getInteger(MIGRATION_V1_READ_SIZE, null)))
             .build();
     }
 

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/server/container/guice/cassandra-guice/src/test/java/org/apache/james/modules/mailbox/CassandraSessionModuleTest.java
----------------------------------------------------------------------
diff --git a/server/container/guice/cassandra-guice/src/test/java/org/apache/james/modules/mailbox/CassandraSessionModuleTest.java b/server/container/guice/cassandra-guice/src/test/java/org/apache/james/modules/mailbox/CassandraSessionModuleTest.java
index 7ccc8a8..5ed9f0f 100644
--- a/server/container/guice/cassandra-guice/src/test/java/org/apache/james/modules/mailbox/CassandraSessionModuleTest.java
+++ b/server/container/guice/cassandra-guice/src/test/java/org/apache/james/modules/mailbox/CassandraSessionModuleTest.java
@@ -60,10 +60,6 @@ public class CassandraSessionModuleTest {
                 .messageReadChunkSize(8)
                 .expungeChunkSize(9)
                 .blobPartSize(10)
-                .onTheFlyV1ToV2Migration(true)
-                .v1ToV2ThreadCount(11)
-                .v1ToV2QueueLength(12)
-                .v1ReadFetchSize(13)
                 .build());
     }
 

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/server/container/guice/cassandra-guice/src/test/resources/modules/mailbox/cassandra.properties
----------------------------------------------------------------------
diff --git a/server/container/guice/cassandra-guice/src/test/resources/modules/mailbox/cassandra.properties b/server/container/guice/cassandra-guice/src/test/resources/modules/mailbox/cassandra.properties
index 54ede24..8d6c9fe 100644
--- a/server/container/guice/cassandra-guice/src/test/resources/modules/mailbox/cassandra.properties
+++ b/server/container/guice/cassandra-guice/src/test/resources/modules/mailbox/cassandra.properties
@@ -8,7 +8,3 @@ chunk.size.flags.update=7
 chunk.size.message.read=8
 chunk.size.expunge=9
 mailbox.blob.part.size=10
-migration.v1.v2.on.the.fly=true
-migration.v1.v2.thread.count=11
-migration.v1.v2.queue.length=12
-migration.v1.read.fetch.size=13

http://git-wip-us.apache.org/repos/asf/james-project/blob/51a1311f/src/site/xdoc/server/config-cassandra.xml
----------------------------------------------------------------------
diff --git a/src/site/xdoc/server/config-cassandra.xml b/src/site/xdoc/server/config-cassandra.xml
index 6b9bf24..db5f92c 100644
--- a/src/site/xdoc/server/config-cassandra.xml
+++ b/src/site/xdoc/server/config-cassandra.xml
@@ -114,13 +114,13 @@
         <dt><strong>mailbox.blob.part.size</strong></dt>
         <dd>Optional. Defaults to 102400 (100KB).<br/> Controls the size of blob parts used to store messages.</dd>
         <dt><strong>migration.v1.v2.on.the.fly</strong></dt>
-        <dd>Optional. Defaults to false.<br/> Controls wether v1 to v2 migration should be run on the fly.</dd>
+        <dd>Only available on tag cassandra_migration_v1_to_v2. Optional. Defaults to false.<br/> Controls wether v1 to v2 migration should be run on the fly.</dd>
         <dt><strong>migration.v1.v2.thread.count</strong></dt>
-        <dd>Optional. Defaults to 2.<br/> Controls the number of threads used to asynchronously migrate from v1 to v2.</dd>
+        <dd>Only available on tag cassandra_migration_v1_to_v2. Optional. Defaults to 2.<br/> Controls the number of threads used to asynchronously migrate from v1 to v2.</dd>
         <dt><strong>migration.v1.v2.queue.length</strong></dt>
-        <dd>Optional. Defaults to 1000.<br/> Controls the queue size of v1 to v2 migration task. Drops when full.</dd>
+        <dd>Only available on tag cassandra_migration_v1_to_v2. Optional. Defaults to 1000.<br/> Controls the queue size of v1 to v2 migration task. Drops when full.</dd>
         <dt><strong>migration.v1.read.fetch.size</strong></dt>
-        <dd>Optional. Defaults to 10.<br/> Controls the fetch size of the request to retrieve all messages stored in V1 during the migration process.</dd>
+        <dd>Only available on tag cassandra_migration_v1_to_v2. Optional. Defaults to 10.<br/> Controls the fetch size of the request to retrieve all messages stored in V1 during the migration process.</dd>
       </dl>
 
 


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