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https://issues.apache.org/jira/browse/HADOOP-16830?focusedWorklogId=479172&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-479172
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ASF GitHub Bot logged work on HADOOP-16830:
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Author: ASF GitHub Bot
Created on: 04/Sep/20 16:05
Start Date: 04/Sep/20 16:05
Worklog Time Spent: 10m
Work Description: steveloughran commented on a change in pull request
#2069:
URL: https://github.com/apache/hadoop/pull/2069#discussion_r483715827
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/impl/CounterIOStatisticsBuilder.java
##########
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.fs.statistics.impl;
+
+/**
+ * Builder of the CounterIOStatistics class.
+ */
+public interface CounterIOStatisticsBuilder {
Review comment:
yeah, it's obsolete. Removed
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Issue Time Tracking
-------------------
Worklog Id: (was: 479172)
Time Spent: 0.5h (was: 20m)
> Add public IOStatistics API; S3A to support
> -------------------------------------------
>
> Key: HADOOP-16830
> URL: https://issues.apache.org/jira/browse/HADOOP-16830
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs, fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Applications like to collect the statistics which specific operations take,
> by collecting exactly those operations done during the execution of FS API
> calls by their individual worker threads, and returning these to their job
> driver
> * S3A has a statistics API for some streams, but it's a non-standard one;
> Impala &c can't use it
> * FileSystem storage statistics are public, but as they aren't cross-thread,
> they don't aggregate properly
> Proposed
> # A new IOStatistics interface to serve up statistics
> # S3A to implement
> # other stores to follow
> # Pass-through from the usual wrapper classes (FS data input/output streams)
> It's hard to think about how best to offer an API for operation context
> stats, and how to actually implement.
> ThreadLocal isn't enough because the helper threads need to update on the
> thread local value of the instigator
> My Initial PoC doesn't address that issue, but it shows what I'm thinking of
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