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HBASE-576 Investigate IPC performance 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@702336 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2008-10-07 03:34:58 +00:00
parent b99382cd1a
commit e45a93170d
1 changed files with 112 additions and 49 deletions
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161
src/java/org/apache/hadoop/hbase/HTableDescriptor.java
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@ -63,18 +63,43 @@ public class HTableDescriptor implements WritableComparable {
private String nameAsString = "";
// Table metadata
protected Map<ImmutableBytesWritable,ImmutableBytesWritable> values =
new HashMap<ImmutableBytesWritable,ImmutableBytesWritable>();
protected Map<ImmutableBytesWritable, ImmutableBytesWritable> values =
new HashMap<ImmutableBytesWritable, ImmutableBytesWritable>();
//TODO: Why can't the following be private? They are only used within this class.
public static final String FAMILIES = "FAMILIES";
public static final ImmutableBytesWritable FAMILIES_KEY =
new ImmutableBytesWritable(Bytes.toBytes(FAMILIES));
public static final String MAX_FILESIZE = "MAX_FILESIZE";
public static final ImmutableBytesWritable MAX_FILESIZE_KEY =
new ImmutableBytesWritable(Bytes.toBytes("MAX_FILESIZE"));
public static final String READONLY = "READONLY";
public static final ImmutableBytesWritable READONLY_KEY =
new ImmutableBytesWritable(Bytes.toBytes("READONLY"));
public static final String MEMCACHE_FLUSHSIZE = "MEMCACHE_FLUSHSIZE";
public static final ImmutableBytesWritable MEMCACHE_FLUSHSIZE_KEY =
new ImmutableBytesWritable(Bytes.toBytes("MEMCACHE_FLUSHSIZE"));
public static final String IS_ROOT = "IS_ROOT";
public static final ImmutableBytesWritable IS_ROOT_KEY =
new ImmutableBytesWritable(Bytes.toBytes("IS_ROOT"));
public static final String IS_META = "IS_META";
public static final ImmutableBytesWritable IS_META_KEY =
new ImmutableBytesWritable(Bytes.toBytes("IS_META"));
public static final ImmutableBytesWritable IN_MEMORY_KEY =
new ImmutableBytesWritable(Bytes.toBytes(HConstants.IN_MEMORY));
// The below are ugly but better than creating them each time till we
// replace booleans being saved as Strings with plain booleans. Need a
// migration script to do this. TODO.
private static final ImmutableBytesWritable FALSE =
new ImmutableBytesWritable(Bytes.toBytes(Boolean.FALSE.toString()));
private static final ImmutableBytesWritable TRUE =
new ImmutableBytesWritable(Bytes.toBytes(Boolean.TRUE.toString()));
public static final boolean DEFAULT_IN_MEMORY = false;
@ -83,9 +108,7 @@ public class HTableDescriptor implements WritableComparable {
public static final int DEFAULT_MEMCACHE_FLUSH_SIZE = 1024*1024*64;
private transient Boolean meta = null;
// End TODO:
// Key is hash of the family name.
private final Map<Integer, HColumnDescriptor> families =
new HashMap<Integer, HColumnDescriptor>();
@ -162,8 +185,7 @@ public class HTableDescriptor implements WritableComparable {
* Can make a modifiable descriptor from an UnmodifyableHTableDescriptor.
* @param desc The descriptor.
*/
public HTableDescriptor(final HTableDescriptor desc)
{
public HTableDescriptor(final HTableDescriptor desc) {
super();
this.name = desc.name.clone();
this.nameAsString = Bytes.toString(this.name);
@ -190,16 +212,13 @@ public class HTableDescriptor implements WritableComparable {
/** @return true if this is the root region */
public boolean isRootRegion() {
String value = getValue(IS_ROOT);
if (value != null)
return Boolean.valueOf(value);
return false;
return isSomething(IS_ROOT_KEY, false);
}
/** @param isRoot true if this is the root region */
protected void setRootRegion(boolean isRoot) {
values.put(new ImmutableBytesWritable(Bytes.toBytes(IS_ROOT)),
new ImmutableBytesWritable(Bytes.toBytes(Boolean.toString(isRoot))));
// TODO: Make the value a boolean rather than String of boolean.
values.put(IS_ROOT_KEY, isRoot? TRUE: FALSE);
}
/** @return true if this is a meta region (part of the root or meta tables) */
@ -211,16 +230,24 @@ public class HTableDescriptor implements WritableComparable {
}
private synchronized Boolean calculateIsMetaRegion() {
String value = getValue(IS_META);
return (value != null)? new Boolean(value): Boolean.FALSE;
return isSomething(IS_META_KEY, false)? Boolean.TRUE: Boolean.FALSE;
}
private boolean isSomething(final ImmutableBytesWritable key,
final boolean valueIfNull) {
byte [] value = getValue(key);
if (value != null) {
// TODO: Make value be a boolean rather than String of boolean.
return Boolean.valueOf(Bytes.toString(value)).booleanValue();
}
return valueIfNull;
}
/**
* @param isMeta true if this is a meta region (part of the root or meta
* tables) */
protected void setMetaRegion(boolean isMeta) {
values.put(new ImmutableBytesWritable(Bytes.toBytes(IS_META)),
new ImmutableBytesWritable(Bytes.toBytes(Boolean.toString(isMeta))));
values.put(IS_META_KEY, isMeta? TRUE: FALSE);
}
/** @return true if table is the meta table */
@ -263,7 +290,11 @@ public class HTableDescriptor implements WritableComparable {
* @return The value.
*/
public byte[] getValue(byte[] key) {
ImmutableBytesWritable ibw = values.get(new ImmutableBytesWritable(key));
return getValue(new ImmutableBytesWritable(key));
}
private byte[] getValue(final ImmutableBytesWritable key) {
ImmutableBytesWritable ibw = values.get(key);
if (ibw == null)
return null;
return ibw.get();
@ -292,8 +323,25 @@ public class HTableDescriptor implements WritableComparable {
* @param value The value.
*/
public void setValue(byte[] key, byte[] value) {
values.put(new ImmutableBytesWritable(key),
new ImmutableBytesWritable(value));
setValue(new ImmutableBytesWritable(key), value);
}
/*
* @param key The key.
* @param value The value.
*/
private void setValue(final ImmutableBytesWritable key,
final byte[] value) {
values.put(key, new ImmutableBytesWritable(value));
}
/*
* @param key The key.
* @param value The value.
*/
private void setValue(final ImmutableBytesWritable key,
final ImmutableBytesWritable value) {
values.put(key, value);
}
/**
@ -309,10 +357,7 @@ public class HTableDescriptor implements WritableComparable {
* HRegionServer cache only
*/
public boolean isInMemory() {
String value = getValue(HConstants.IN_MEMORY);
if (value != null)
return Boolean.valueOf(value);
return DEFAULT_IN_MEMORY;
return isSomething(IN_MEMORY_KEY, DEFAULT_IN_MEMORY);
}
/**
@ -320,25 +365,22 @@ public class HTableDescriptor implements WritableComparable {
* the HRegionServer cache only.
*/
public void setInMemory(boolean inMemory) {
setValue(HConstants.IN_MEMORY, Boolean.toString(inMemory));
setValue(IN_MEMORY_KEY, inMemory? TRUE: FALSE);
}
/**
* @return true if all columns in the table should be read only
*/
public boolean isReadOnly() {
String value = getValue(READONLY);
if (value != null)
return Boolean.valueOf(value);
return DEFAULT_READONLY;
return isSomething(READONLY_KEY, DEFAULT_READONLY);
}
/**
* @param readOnly True if all of the columns in the table should be read
* only.
*/
public void setReadOnly(boolean readOnly) {
setValue(READONLY, Boolean.toString(readOnly));
public void setReadOnly(final boolean readOnly) {
setValue(READONLY_KEY, readOnly? TRUE: FALSE);
}
/** @return name of table */
@ -353,9 +395,9 @@ public class HTableDescriptor implements WritableComparable {
/** @return max hregion size for table */
public long getMaxFileSize() {
String value = getValue(MAX_FILESIZE);
byte [] value = getValue(MAX_FILESIZE_KEY);
if (value != null)
return Long.valueOf(value);
return Long.valueOf(Bytes.toString(value)).longValue();
return HConstants.DEFAULT_MAX_FILE_SIZE;
}
@ -364,16 +406,16 @@ public class HTableDescriptor implements WritableComparable {
* before a split is triggered.
*/
public void setMaxFileSize(long maxFileSize) {
setValue(MAX_FILESIZE, Long.toString(maxFileSize));
setValue(MAX_FILESIZE_KEY, Bytes.toBytes(Long.toString(maxFileSize)));
}
/**
* @return memory cache flush size for each hregion
*/
public int getMemcacheFlushSize() {
String value = getValue(MEMCACHE_FLUSHSIZE);
byte [] value = getValue(MEMCACHE_FLUSHSIZE_KEY);
if (value != null)
return Integer.valueOf(value);
return Integer.valueOf(Bytes.toString(value)).intValue();
return DEFAULT_MEMCACHE_FLUSH_SIZE;
}
@ -381,7 +423,8 @@ public class HTableDescriptor implements WritableComparable {
* @param memcacheFlushSize memory cache flush size for each hregion
*/
public void setMemcacheFlushSize(int memcacheFlushSize) {
setValue(MEMCACHE_FLUSHSIZE, Integer.toString(memcacheFlushSize));
setValue(MEMCACHE_FLUSHSIZE_KEY,
Bytes.toBytes(Integer.toString(memcacheFlushSize)));
}
/**
@ -514,18 +557,28 @@ public class HTableDescriptor implements WritableComparable {
// Comparable
public int compareTo(Object o) {
HTableDescriptor other = (HTableDescriptor) o;
int result = Bytes.compareTo(this.name, other.name);
return compareTo(this, (HTableDescriptor)o);
}
/**
* @param left
* @param right
* @return 0 if equal, etc.
*/
public static int compareTo(HTableDescriptor left, HTableDescriptor right) {
int result = Bytes.compareTo(left.getName(), right.getName());
Collection<HColumnDescriptor> leftFamilies = left.getFamilies();
Collection<HColumnDescriptor> rightFamilies = right.getFamilies();
if (result == 0) {
result = families.size() - other.families.size();
result = leftFamilies.size() - rightFamilies.size();
}
if (result == 0 && families.size() != other.families.size()) {
result = Integer.valueOf(families.size()).compareTo(
Integer.valueOf(other.families.size()));
if (result == 0 && leftFamilies.size() != rightFamilies.size()) {
result = Integer.valueOf(leftFamilies.size()).compareTo(
Integer.valueOf(rightFamilies.size()));
}
if (result == 0) {
for (Iterator<HColumnDescriptor> it = families.values().iterator(),
it2 = other.families.values().iterator(); it.hasNext(); ) {
for (Iterator<HColumnDescriptor> it = leftFamilies.iterator(),
it2 = rightFamilies.iterator(); it.hasNext(); ) {
result = it.next().compareTo(it2.next());
if (result != 0) {
break;
@ -534,7 +587,7 @@ public class HTableDescriptor implements WritableComparable {
}
if (result == 0) {
// punt on comparison for ordering, just calculate difference
result = this.values.hashCode() - other.values.hashCode();
result = leftFamilies.hashCode() - rightFamilies.hashCode();
if (result < 0)
result = -1;
else if (result > 0)
@ -542,6 +595,16 @@ public class HTableDescriptor implements WritableComparable {
}
return result;
}
/**
* Comparator used in UI jsp.
*/
public static class HTableDescriptorComparator
implements java.util.Comparator<HTableDescriptor> {
public int compare(HTableDescriptor o1, HTableDescriptor o2) {
return compareTo(o1, o2);
}
}
/**
* @return Immutable sorted map of families.