io.warp10.continuum.store.HFileStats.java Source code

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Here is the source code for io.warp10.continuum.store.HFileStats.java

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//
//   Copyright 2016  Cityzen Data
//
//   Licensed 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 io.warp10.continuum.store;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;

public class HFileStats {

    public static void main(String[] args) throws Exception {

        Configuration conf = new Configuration();
        CacheConfig cacheConf = new CacheConfig(conf);

        FileSystem fs = FileSystem.newInstance(conf);

        FileStatus[] pathes = fs.globStatus(new Path(args[0]));

        long bytes = 0L;
        long cells = 0L;

        for (FileStatus status : pathes) {
            try {
                HFile.Reader reader = HFile.createReader(fs, status.getPath(), cacheConf, conf);
                bytes += reader.length();
                cells += reader.getEntries();

                System.out.println(
                        status.getPath() + " >>> " + reader.length() + " bytes " + reader.getEntries() + " cells");

                reader.close();
            } catch (Exception e) {
                continue;
            }
        }

        System.out.println(
                "TOTAL: " + cells + " cells " + bytes + " bytes " + (bytes / (double) cells) + " bytes/cell");

        long ts = System.currentTimeMillis();

        System.out.println(ts * 1000 + "// hbase.bytes{} " + bytes);
        System.out.println(ts * 1000 + "// hbase.datapoints{} " + cells);
    }
}