Author: ecn
Date: Thu Jun 20 14:42:58 2013
New Revision: 1495029
URL: http://svn.apache.org/r1495029
Log:
More 1.5 updates
Modified:
accumulo/site/trunk/content/notable_features.mdtext
Modified: accumulo/site/trunk/content/notable_features.mdtext
URL:
http://svn.apache.org/viewvc/accumulo/site/trunk/content/notable_features.mdtext?rev=1495029&r1=1495028&r2=1495029&view=diff
==============================================================================
--- accumulo/site/trunk/content/notable_features.mdtext (original)
+++ accumulo/site/trunk/content/notable_features.mdtext Thu Jun 20 14:42:58 2013
@@ -74,11 +74,11 @@ and Zookeeper (see [FATE](#fate)).
### Write ahead log
-Tablet servers send mutations to loggers, not HDFS. Each mutation is written
-to multiple loggers, before being committed. In normal configurations, loggers
+In version 1.4, tablet servers send mutations to loggers which write to the
local file system, not HDFS.
+Each mutation is written to multiple loggers, before being committed. In
normal configurations, loggers
are run on every server that runs a tablet server. When a log is needed for
recovery, it is copied into HDFS. For efficient recovery, the log is sorted as
-it is copied.
+it is copied. In version 1.5, write ahead logs are written to HDFS, and
loggers are no longer needed.
### Logical time
@@ -378,7 +378,8 @@ used to accommodate new data patterns in
### Tablet Merging (1.4)
Tablet merging is a new feature. Merging of tablets can be requested in the
-shell; Accumulo does not merge tablets automatically.
+shell; Accumulo does not merge tablets automatically. In 1.5, the METADATA
tablets
+can be merged.
### Table Cloning (1.4)
@@ -406,4 +407,3 @@ beginning and end of the range are split
[2]: /1.4/user_manual/Security.html
[4]: /1.4/user_manual/Writing_Accumulo_Clients.html
[6]: /1.4/user_manual/High_Speed_Ingest.html#Bulk_Ingest
-
