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https://issues.apache.org/jira/browse/HBASE-16935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Zvagelsky reopened HBASE-16935:
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It would be handy if we can completely delete column family and its store files
from a table without disabling the table, in the case when we can guarantee
what will be no read/write operations with this column family, and we don't
need this family more.
> Java API method Admin.deleteColumn(table, columnFamily) doesn't delete
> family's StoreFile from file system.
> -----------------------------------------------------------------------------------------------------------
>
> Key: HBASE-16935
> URL: https://issues.apache.org/jira/browse/HBASE-16935
> Project: HBase
> Issue Type: New Feature
> Components: Admin
> Affects Versions: 1.2.3
> Reporter: Mikhail Zvagelsky
> Attachments: Selection_008.png
>
>
> The method deleteColumn(TableName tableName, byte[] columnName) of the class
> org.apache.hadoop.hbase.client.Admin shoud delete specified column family
> from specified table. (Despite of its name the method removes the family, not
> a column - view the [issue|
> https://issues.apache.org/jira/browse/HBASE-1989].)
> This method changes the table's schema, but it doesn't delete column family's
> Store File from a file system. To be precise - I run this code:
> {code:|borderStyle=solid}
> import java.io.IOException;
> import org.apache.hadoop.conf.Configuration;
> import org.apache.hadoop.hbase.HBaseConfiguration;
> import org.apache.hadoop.hbase.HColumnDescriptor;
> import org.apache.hadoop.hbase.HTableDescriptor;
> import org.apache.hadoop.hbase.TableName;
> import org.apache.hadoop.hbase.client.*;
> import org.apache.hadoop.hbase.util.Bytes;
> public class ToHBaseIssueTracker {
> public static void main(String[] args) throws IOException {
> TableName tableName = TableName.valueOf("test_table");
> HTableDescriptor desc = new HTableDescriptor(tableName);
> desc.addFamily(new HColumnDescriptor("cf1"));
> desc.addFamily(new HColumnDescriptor("cf2"));
> Configuration conf = HBaseConfiguration.create();
> Connection connection = ConnectionFactory.createConnection(conf);
> Admin admin = connection.getAdmin();
> admin.createTable(desc);
> HTable table = new HTable(conf, "test_table");
> for (int i = 0; i < 4; i++) {
> Put put = new Put(Bytes.toBytes(i)); // Use i as row key.
> put.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("a"),
> Bytes.toBytes("value"));
> put.addColumn(Bytes.toBytes("cf2"), Bytes.toBytes("a"),
> Bytes.toBytes("value"));
> table.put(put);
> }
> admin.deleteColumn(tableName, Bytes.toBytes("cf2"));
> admin.majorCompact(tableName);
> admin.close();
> }
> }
> {code}
> Then I see that the store file for the "cf2" family persists in file system.
> I observe this effect in standalone hbase installation and in
> pseudo-distributed mode.
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