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https://issues.apache.org/jira/browse/HBASE-14061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15801374#comment-15801374
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Ashish Singhi commented on HBASE-14061:
---------------------------------------
{code}
/**
1280 * Return the encryption algorithm in use by this family
1281 * <p/>
1282 * Not using {@code enum} here because HDFS is not using {@code enum}
for storage policy, see
1283 *
org.apache.hadoop.hdfs.server.blockmanagement.BlockStoragePolicySuite for more
details
1284 */
1285 public String getStoragePolicy() {
1286 return getValue(STORAGE_POLICY);
1287 }
/**
1290 * Set the encryption algorithm for use with this family
1291 * @param policy
1292 */
1293 public HColumnDescriptor setStoragePolicy(String policy) {
1294 setValue(STORAGE_POLICY, policy);
1295 return this;
1296 }
{code}
That javadoc is for HCD#getEncryptionType, need to correct it.
Otheriswe LGTM.
> Support CF-level Storage Policy
> -------------------------------
>
> Key: HBASE-14061
> URL: https://issues.apache.org/jira/browse/HBASE-14061
> Project: HBase
> Issue Type: Sub-task
> Components: HFile, regionserver
> Environment: hadoop-2.6.0
> Reporter: Victor Xu
> Assignee: Yu Li
> Attachments: HBASE-14061-master-v1.patch, HBASE-14061.v2.patch,
> HBASE-14061.v3.patch
>
>
> After reading [HBASE-12848|https://issues.apache.org/jira/browse/HBASE-12848]
> and [HBASE-12934|https://issues.apache.org/jira/browse/HBASE-12934], I wrote
> a patch to implement cf-level storage policy.
> My main purpose is to improve random-read performance for some really hot
> data, which usually locates in certain column family of a big table.
> Usage:
> $ hbase shell
> > alter 'TABLE_NAME', METADATA => {'hbase.hstore.block.storage.policy' =>
> > 'POLICY_NAME'}
> > alter 'TABLE_NAME', {NAME=>'CF_NAME', METADATA =>
> > {'hbase.hstore.block.storage.policy' => 'POLICY_NAME'}}
> HDFS's setStoragePolicy can only take effect when new hfile is created in a
> configured directory, so I had to make sub directories(for each cf) in
> region's .tmp directory and set storage policy for them.
> Besides, I had to upgrade hadoop version to 2.6.0 because
> dfs.getStoragePolicy cannot be easily written in reflection, and I needed
> this api to finish my unit test.
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