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java.lang.Objectorg.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager
@InterfaceAudience.Private @InterfaceStability.Unstable public class RegionServerSnapshotManager
This manager class handles the work dealing with snapshots for a HRegionServer.
This provides the mechanism necessary to kick off a online snapshot specific
Subprocedure that is responsible for the regions being served by this region server.
If any failures occur with the subprocedure, the RegionSeverSnapshotManager's subprocedure
handler, ProcedureMember, notifies the master's ProcedureCoordinator to abort all
others.
On startup, requires start() to be called.
On shutdown, requires stop(boolean) to be called
| Nested Class Summary | |
|---|---|
class |
RegionServerSnapshotManager.SnapshotSubprocedureBuilder
Build the actual snapshot runner that will do all the 'hard' work |
| Field Summary | |
|---|---|
static int |
SNAPSHOT_REQUEST_THREADS_DEFAULT
# of threads for snapshotting regions on the rs. |
static String |
SNAPSHOT_REQUEST_THREADS_KEY
Conf key for number of request threads to start snapshots on regionservers |
static String |
SNAPSHOT_REQUEST_WAKE_MILLIS_KEY
Conf key for millis between checks to see if snapshot completed or if there are errors |
static long |
SNAPSHOT_TIMEOUT_MILLIS_DEFAULT
Keep threads alive in request pool for max of 60 seconds |
static String |
SNAPSHOT_TIMEOUT_MILLIS_KEY
Conf key for max time to keep threads in snapshot request pool waiting |
| Constructor Summary | |
|---|---|
RegionServerSnapshotManager(RegionServerServices rss)
Create a default snapshot handler - uses a zookeeper based member controller. |
|
| Method Summary | |
|---|---|
Subprocedure |
buildSubprocedure(HBaseProtos.SnapshotDescription snapshot)
If in a running state, creates the specified subprocedure for handling an online snapshot. |
void |
start()
Start accepting snapshot requests. |
void |
stop(boolean force)
Close this and all running snapshot tasks |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final String SNAPSHOT_REQUEST_THREADS_KEY
public static final int SNAPSHOT_REQUEST_THREADS_DEFAULT
public static final String SNAPSHOT_TIMEOUT_MILLIS_KEY
public static final long SNAPSHOT_TIMEOUT_MILLIS_DEFAULT
public static final String SNAPSHOT_REQUEST_WAKE_MILLIS_KEY
| Constructor Detail |
|---|
public RegionServerSnapshotManager(RegionServerServices rss)
throws org.apache.zookeeper.KeeperException
rss - region server running the handler
org.apache.zookeeper.KeeperException - if the zookeeper cluster cannot be reached| Method Detail |
|---|
public void start()
public void stop(boolean force)
throws IOException
force - forcefully stop all running tasks
IOExceptionpublic Subprocedure buildSubprocedure(HBaseProtos.SnapshotDescription snapshot)
snapshot -
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