[
https://issues.apache.org/jira/browse/HDDS-2169?focusedWorklogId=324140&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-324140
]
ASF GitHub Bot logged work on HDDS-2169:
----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Oct/19 04:08
Start Date: 07/Oct/19 04:08
Worklog Time Spent: 10m
Work Description: bshashikant commented on issue #1517: HDDS-2169. Avoid
buffer copies while submitting client requests in Ratis
URL: https://github.com/apache/hadoop/pull/1517#issuecomment-538832263
Thanks @szetszwo for working on this. I have added the relavent change
below as well while submitting the close container request.
`index 179547b8444..80e91cdf55d 100644
---
a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/XceiverServerRatis.java
+++
b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/XceiverServerRatis.java
@@ -27,6 +27,7 @@
import
org.apache.hadoop.hdds.protocol.proto.StorageContainerDatanodeProtocolProtos.PipelineReport;
import
org.apache.hadoop.hdds.protocol.proto.StorageContainerDatanodeProtocolProtos.ClosePipelineInfo;
import
org.apache.hadoop.hdds.protocol.proto.StorageContainerDatanodeProtocolProtos.PipelineAction;
+import org.apache.hadoop.hdds.ratis.ContainerCommandRequestMessage;
import org.apache.hadoop.hdds.scm.HddsServerUtil;
import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
import org.apache.hadoop.hdds.security.x509.SecurityConfig;
@@ -516,8 +517,8 @@ private RaftClientRequest createRaftClientRequest(
RaftClientRequest.Type type) {
return new RaftClientRequest(clientId, server.getId(),
RaftGroupId.valueOf(PipelineID.getFromProtobuf(pipelineID).getId()),
- nextCallId(), Message.valueOf(request.toByteString()), type,
- null);
+ nextCallId(), ContainerCommandRequestMessage.toMessage(request,
null),
+ type, null);
}
`
I have verified the unit tests and committed this.
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Issue Time Tracking
-------------------
Worklog Id: (was: 324140)
Time Spent: 4h 20m (was: 4h 10m)
> Avoid buffer copies while submitting client requests in Ratis
> -------------------------------------------------------------
>
> Key: HDDS-2169
> URL: https://issues.apache.org/jira/browse/HDDS-2169
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Shashikant Banerjee
> Assignee: Tsz-wo Sze
> Priority: Major
> Labels: pull-request-available
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> Currently, while sending write requests to Ratis from ozone, a protobuf
> object containing data encoded and then resultant protobuf is again
> converted to a byteString which internally does a copy of the buffer embedded
> inside the protobuf again so that it can be submitted over to Ratis client.
> Again, while sending the appendRequest as well while building up the
> appendRequestProto, it might be again copying the data. The idea here is to
> provide client so pass the raw data(stateMachine data) separately to ratis
> client without copying overhead.
>
> {code:java}
> private CompletableFuture<RaftClientReply> sendRequestAsync(
> ContainerCommandRequestProto request) {
> try (Scope scope = GlobalTracer.get()
> .buildSpan("XceiverClientRatis." + request.getCmdType().name())
> .startActive(true)) {
> ContainerCommandRequestProto finalPayload =
> ContainerCommandRequestProto.newBuilder(request)
> .setTraceID(TracingUtil.exportCurrentSpan())
> .build();
> boolean isReadOnlyRequest = HddsUtils.isReadOnly(finalPayload);
> // finalPayload already has the byteString data embedded.
> ByteString byteString = finalPayload.toByteString(); -----> It involves a
> copy again.
> if (LOG.isDebugEnabled()) {
> LOG.debug("sendCommandAsync {} {}", isReadOnlyRequest,
> sanitizeForDebug(finalPayload));
> }
> return isReadOnlyRequest ?
> getClient().sendReadOnlyAsync(() -> byteString) :
> getClient().sendAsync(() -> byteString);
> }
> }
> {code}
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