Index: src/docbkx/book.xml
===================================================================
--- src/docbkx/book.xml (revision 1175882)
+++ src/docbkx/book.xml (working copy)
@@ -1247,9 +1247,7 @@
-
- Daemons
- Master
+ Master
HMaster is the implementation of the Master Server. The Master server
is responsible for monitoring all RegionServer instances in the cluster, and is
the interface for all metadata changes.
@@ -1275,13 +1273,15 @@
Processes
The Master runs several background threads:
-
- LoadBalancer periodically reassign regions in the cluster.
-
- CatalogJanitor periodically checks and cleans up the .META. table.
-
-
+ LoadBalancer
+ Periodically, and when there are not any regions in transition,
+ a load balancer will run and move regions around to balance cluster load.
+ See for configuring this property.
+
+ CatalogJanitor
+ Periodically checks and cleans up the .META. table. See for more information on META.
+
@@ -1302,24 +1302,25 @@
Processes
The RegionServer runs a variety of background threads:
-
- CompactSplitThread checks for splits and handle minor compactions.
-
- MajorCompactionChecker checks for major compactions.
-
- MemStoreFlusher periodically flushes in-memory writes in the MemStore to StoreFiles.
-
- LogRoller periodically checks the RegionServer's HLog.
-
-
+ CompactSplitThread
+ Checks for splits and handle minor compactions.
+
+ MajorCompactionChecker
+ Checks for major compactions.
+
+ MemStoreFlusher
+ Periodically flushes in-memory writes in the MemStore to StoreFiles.
+
+ LogRoller
+ Periodically checks the RegionServer's HLog.
+
-
Regions
- This chapter is all about Regions.
+ This section is all about Regions.
Regions are comprised of a Store per Column Family.
@@ -1379,14 +1380,13 @@
splits (and for why you might do this)
-
- Region Load Balancer
+
+ Region Load Balancing
- Periodically, and when there are not any regions in transition,
- a load balancer will run and move regions around to balance cluster load.
- The period at which it runs can be configured.
+ Regions can be periodically moved by the .
+
Index: src/docbkx/configuration.xml
===================================================================
--- src/docbkx/configuration.xml (revision 1175882)
+++ src/docbkx/configuration.xml (working copy)
@@ -1095,7 +1095,16 @@
+ Other Configurations
+ Balancer
+ The balancer is periodic operation run on the master to redistribute regions on the cluster. It is configured via
+ hbase.balancer.period and defaults to 300000 (5 minutes).
+ See for more information on the LoadBalancer.
+
+
+
+
Bloom Filter Configuration