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https://issues.apache.org/jira/browse/ACCUMULO-4187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15238554#comment-15238554
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ASF GitHub Bot commented on ACCUMULO-4187:
------------------------------------------
Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/90#discussion_r59489612
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/streams/BoundedRangeFileInputStream.java
---
@@ -14,24 +14,22 @@
* License for the specific language governing permissions and limitations
under
* the License.
*/
-
-package org.apache.accumulo.core.file.rfile.bcfile;
+package org.apache.accumulo.core.file.streams;
import java.io.IOException;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
-import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.Seekable;
--- End diff --
Seekable is public/evolving which means it's probably OK for us to expect
to be stable, but mentioning to make sure we consciously acknowledge that.
> Rate limiting of major compactions
> ----------------------------------
>
> Key: ACCUMULO-4187
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4187
> Project: Accumulo
> Issue Type: Improvement
> Components: core, tserver
> Affects Versions: 1.8.0
> Reporter: Shawn Walker
> Assignee: Shawn Walker
> Priority: Minor
> Fix For: 1.8.0
>
>
> In discussing [ACCUMULO-4166] with Keith Turner, we decided that the
> underlying issue is that major compactions can overwhelm a tablet server,
> rendering it nearly unresponsive.
> To address this, we should take a cue from Apache Cassandra and restrict how
> quickly we perform major compactions. Rate limiting reads and writes
> involved in major compactions will directly affect the IO load caused by
> major compactions, and should also indirectly affect the CPU load.
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