Package org.apache.accumulo.core.metadata.schema

Class MetadataSchema.TabletsSection.TabletColumnFamily

java.lang.Object

org.apache.accumulo.core.metadata.schema.MetadataSchema.TabletsSection.TabletColumnFamily

Enclosing class:

MetadataSchema.TabletsSection

public static class MetadataSchema.TabletsSection.TabletColumnFamily
extends Object

Column family for storing the tablet information needed by clients

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.hadoop.io.Text	NAME
static ColumnFQ	OLD_PREV_ROW_COLUMN
static String	OLD_PREV_ROW_QUAL	A temporary field in case a split fails and we need to roll back
static ColumnFQ	PREV_ROW_COLUMN
static String	PREV_ROW_QUAL	README : very important that prevRow sort last to avoid race conditions between garbage collector and split this needs to sort after everything else for that tablet
static ColumnFQ	SPLIT_RATIO_COLUMN
static String	SPLIT_RATIO_QUAL	A temporary field for splits to optimize certain operations
static String	STR_NAME	This needs to sort after all other column families for that tablet, because the PREV_ROW_COLUMN sits in this and that needs to sort last because the SimpleGarbageCollector relies on this.

Constructor Summary

Constructors

Constructor	Description
TabletColumnFamily()

Method Summary

Modifier and Type	Method	Description
static Mutation	createPrevRowMutation(KeyExtent ke)	Creates a mutation that encodes a KeyExtent as a prevRow entry.
static org.apache.hadoop.io.Text	decodePrevEndRow(Value ibw)
static Value	encodePrevEndRow(org.apache.hadoop.io.Text per)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

STR_NAME

public static final String STR_NAME

This needs to sort after all other column families for that tablet, because the PREV_ROW_COLUMN sits in this and that needs to sort last because the SimpleGarbageCollector relies on this.

See Also:

Constant Field Values

NAME

public static final org.apache.hadoop.io.Text NAME

PREV_ROW_QUAL

public static final String PREV_ROW_QUAL

README : very important that prevRow sort last to avoid race conditions between garbage collector and split this needs to sort after everything else for that tablet

See Also:

Constant Field Values

PREV_ROW_COLUMN

public static final ColumnFQ PREV_ROW_COLUMN

OLD_PREV_ROW_QUAL

public static final String OLD_PREV_ROW_QUAL

A temporary field in case a split fails and we need to roll back

See Also:

Constant Field Values

OLD_PREV_ROW_COLUMN

public static final ColumnFQ OLD_PREV_ROW_COLUMN

SPLIT_RATIO_QUAL

public static final String SPLIT_RATIO_QUAL

A temporary field for splits to optimize certain operations

See Also:

Constant Field Values

SPLIT_RATIO_COLUMN

public static final ColumnFQ SPLIT_RATIO_COLUMN

Constructor Detail

TabletColumnFamily

public TabletColumnFamily()

Method Detail

encodePrevEndRow

public static Value encodePrevEndRow(org.apache.hadoop.io.Text per)

decodePrevEndRow

public static org.apache.hadoop.io.Text decodePrevEndRow(Value ibw)

createPrevRowMutation

public static Mutation createPrevRowMutation(KeyExtent ke)

Creates a mutation that encodes a KeyExtent as a prevRow entry.