Skip to content

H
h2database
提交 cf22c641 authored 作者: Thomas Mueller's avatar Thomas Mueller
浏览文件
操作

new experimental page store

上级 3d361d59
无相关合并请求
显示空白字符变更
内嵌 并排
正在显示 包含 214 行增加 和 27 行删除
h2/src/main/org/h2/command/ddl/AlterTableAlterColumn.java
浏览文件 @ cf22c641
......@@ -240,7 +240,7 @@ public class AlterTableAlterColumn extends SchemaCommand {
// with the old table
// still need a new id because using 0 would mean: the new table tries
// to use the rows of the table 0 (the meta table)
int id = -1;
int id = db.allocateObjectId(true, true);
TableData newTable = getSchema().createTable(tempName, id, newColumns, persistent, false, Index.EMPTY_HEAD);
newTable.setComment(table.getComment());
StringBuffer buff = new StringBuffer(newTable.getCreateSQL());
......
h2/src/main/org/h2/index/PageBtreeNode.java
浏览文件 @ cf22c641
......@@ -201,7 +201,7 @@ class PageBtreeNode extends PageBtree {
return false;
}
// this child is now empty
index.getPageStore().freePage(page.getPageId());
index.getPageStore().freePage(page.getPageId(), true, page.data);
if (entryCount < 1) {
// no more children - this page is empty as well
return true;
......
h2/src/main/org/h2/index/PageDataLeaf.java
浏览文件 @ cf22c641
......@@ -6,6 +6,7 @@
*/
package org.h2.index;
import java.sql.SQLException;
import java.util.Arrays;
import org.h2.constant.ErrorCode;
import org.h2.engine.Session;
......@@ -92,8 +93,6 @@ class PageDataLeaf extends PageData {
int addRow(Row row) throws SQLException {
int rowLength = row.getByteCount(data);
int pageSize = index.getPageStore().getPageSize();
// TODO currently the order is important
// TODO and can only add at the end
int last = entryCount == 0 ? pageSize : offsets[entryCount - 1];
if (entryCount > 0 && last - rowLength < start + KEY_OFFSET_PAIR_LENGTH) {
int todoSplitAtLastInsertionPoint;
......@@ -112,11 +111,15 @@ class PageDataLeaf extends PageData {
System.arraycopy(keys, 0, newKeys, 0, x);
System.arraycopy(rows, 0, newRows, 0, x);
if (x < entryCount) {
System.arraycopy(offsets, x, newOffsets, x + 1, entryCount - x);
for (int j = x; j < entryCount; j++) {
newOffsets[j + 1] = offsets[j] - rowLength;
}
System.arraycopy(keys, x, newKeys, x + 1, entryCount - x);
System.arraycopy(rows, x, newRows, x + 1, entryCount - x);
}
}
last = x == 0 ? pageSize : offsets[x - 1];
offset = last - rowLength;
entryCount++;
start += KEY_OFFSET_PAIR_LENGTH;
newOffsets[x] = offset;
......@@ -175,7 +178,11 @@ class PageDataLeaf extends PageData {
System.arraycopy(offsets, 0, newOffsets, 0, i);
System.arraycopy(keys, 0, newKeys, 0, i);
System.arraycopy(rows, 0, newRows, 0, i);
System.arraycopy(offsets, i + 1, newOffsets, i, entryCount - i);
int startNext = i < entryCount - 1 ? offsets[i + 1] : index.getPageStore().getPageSize();
int rowLength = offsets[i] - startNext;
for (int j = i; j < entryCount; j++) {
newOffsets[j] = offsets[j + 1] + rowLength;
}
System.arraycopy(keys, i + 1, newKeys, i, entryCount - i);
System.arraycopy(rows, i + 1, newRows, i, entryCount - i);
start -= KEY_OFFSET_PAIR_LENGTH;
......@@ -335,6 +342,9 @@ class PageDataLeaf extends PageData {
if (firstOverflowPageId != 0) {
data.writeInt(firstOverflowPageId);
}
if (getPos() == 1) {
System.out.println("pause");
}
for (int i = 0; i < entryCount; i++) {
data.writeInt(keys[i]);
data.writeShortInt(offsets[i]);
......
h2/src/main/org/h2/index/PageDataNode.java
浏览文件 @ cf22c641
......@@ -196,7 +196,7 @@ class PageDataNode extends PageData {
return false;
}
// this child is now empty
index.getPageStore().freePage(page.getPageId());
index.getPageStore().freePage(page.getPageId(), true, page.data);
if (entryCount < 1) {
// no more children - this page is empty as well
return true;
......@@ -217,6 +217,9 @@ class PageDataNode extends PageData {
int count = 0;
for (int i = 0; i < childPageIds.length; i++) {
PageData page = index.getPage(childPageIds[i]);
if (getPos() == page.getPos()) {
throw Message.throwInternalError("Page it its own child: " + getPageId());
}
count += page.getRowCount();
}
rowCount = count;
......
h2/src/main/org/h2/index/PageScanIndex.java
浏览文件 @ cf22c641
......@@ -40,7 +40,7 @@ public class PageScanIndex extends BaseIndex implements RowIndex {
public PageScanIndex(TableData table, int id, IndexColumn[] columns, IndexType indexType, int headPos) throws SQLException {
initBaseIndex(table, id, table.getName() + "_TABLE_SCAN", columns, indexType);
int test;
// trace.setLevel(TraceSystem.DEBUG);
trace.setLevel(TraceSystem.DEBUG);
if (database.isMultiVersion()) {
int todoMvcc;
}
......@@ -85,9 +85,15 @@ public class PageScanIndex extends BaseIndex implements RowIndex {
public void add(Session session, Row row) throws SQLException {
if (row.getPos() == 0) {
row.setPos(++lastKey);
} else {
lastKey = Math.max(lastKey, row.getPos() + 1);
}
if (trace.isDebugEnabled()) {
trace.debug("add " + row.getPos());
int test;
if (table.getId() == -1) {
System.out.println("pause");
}
trace.debug("add table:" + table.getId() + " " + row);
}
if (tableData.getContainsLargeObject()) {
for (int i = 0; i < row.getColumnCount(); i++) {
......@@ -191,6 +197,9 @@ public class PageScanIndex extends BaseIndex implements RowIndex {
public void remove(Session session, Row row) throws SQLException {
if (trace.isDebugEnabled()) {
trace.debug("remove " + row.getPos());
if (table.getId() == -1) {
System.out.println("pause");
}
}
if (tableData.getContainsLargeObject()) {
for (int i = 0; i < row.getColumnCount(); i++) {
......
h2/src/main/org/h2/store/PageInputStream.java
浏览文件 @ cf22c641
......@@ -112,7 +112,7 @@ public class PageInputStream extends InputStream {
remaining = store.getPageSize() - page.length();
}
if (trace.isDebugEnabled()) {
trace.debug("pageIn.readPage " + parentPage + " next:" + nextPage);
// trace.debug("pageIn.readPage " + parentPage + " next:" + nextPage);
}
} catch (SQLException e) {
throw Message.convertToIOException(e);
......
h2/src/main/org/h2/store/PageLog.java
浏览文件 @ cf22c641
......@@ -234,7 +234,7 @@ e.printStackTrace();
reservedPages[i] = store.allocatePage();
}
for (int i = 0; i < pageCount; i++) {
store.freePage(reservedPages[i]);
store.freePage(reservedPages[i], false, null);
}
}
......
h2/src/main/org/h2/store/PageStore.java
浏览文件 @ cf22c641
......@@ -168,7 +168,7 @@ public class PageStore implements CacheWriter {
this.database = database;
trace = database.getTrace(Trace.PAGE_STORE);
int test;
// trace.setLevel(TraceSystem.DEBUG);
trace.setLevel(TraceSystem.DEBUG);
this.cacheSize = cacheSizeDefault;
String cacheType = database.getCacheType();
if (Cache2Q.TYPE_NAME.equals(cacheType)) {
......@@ -407,6 +407,10 @@ public class PageStore implements CacheWriter {
synchronized (database) {
Record record = (Record) obj;
if (trace.isDebugEnabled()) {
int test;
if (record.getPos() == 1) {
System.out.println("pause");
}
trace.debug("writeBack " + record);
}
int todoRemoveParameter;
......@@ -426,6 +430,10 @@ public class PageStore implements CacheWriter {
synchronized (database) {
if (trace.isDebugEnabled()) {
if (!record.isChanged()) {
int test;
if(record.getPos() == 1) {
System.out.println("pause");
}
trace.debug("updateRecord " + record.toString());
}
}
......@@ -481,7 +489,7 @@ public class PageStore implements CacheWriter {
if (trace.isDebugEnabled()) {
trace.debug("allocated " + id + " atEnd:" + atEnd);
}
if (id > pageCount) {
if (id >= pageCount) {
increaseFileSize(INCREMENT_PAGES);
}
return id;
......@@ -498,8 +506,10 @@ public class PageStore implements CacheWriter {
* Add a page to the free list.
*
* @param pageId the page id
* @param logUndo if an undo entry need to be logged
* @param old the old data (if known)
*/
public void freePage(int pageId) throws SQLException {
public void freePage(int pageId, boolean logUndo, DataPage old) throws SQLException {
if (trace.isDebugEnabled()) {
trace.debug("freePage " + pageId);
}
......@@ -507,7 +517,13 @@ public class PageStore implements CacheWriter {
getFreeList().free(pageId);
if (recoveryRunning) {
writePage(pageId, createDataPage());
} else if (logUndo) {
if (old == null) {
old = readPage(pageId);
}
getLog().addUndo(pageId, old);
}
}
/**
......@@ -626,9 +642,8 @@ public class PageStore implements CacheWriter {
* @param undo true if the undo step should be run
*/
private void recover(boolean undo) throws SQLException {
if (undo) {
trace.debug("log recover");
} else {
trace.debug("log recover #" + undo);
if (!undo) {
openMetaIndex();
readMetaData();
}
......@@ -849,6 +864,9 @@ public class PageStore implements CacheWriter {
meta = table.getScanIndex(database.getSystemSession());
} else {
PageScanIndex p = (PageScanIndex) metaObjects.get(ObjectUtils.getInteger(parent));
if (p == null) {
throw Message.throwInternalError("parent not found:" + parent);
}
TableData table = (TableData) p.getTable();
Column[] tableCols = table.getColumns();
Column[] cols = new Column[columns.length];
......@@ -861,6 +879,11 @@ public class PageStore implements CacheWriter {
metaObjects.put(ObjectUtils.getInteger(id), meta);
}
/**
* Add the meta data of an index.
*
* @param index the index to add
*/
public void addMeta(Index index) throws SQLException {
int type = index instanceof PageScanIndex ? META_TYPE_SCAN_INDEX : META_TYPE_BTREE_INDEX;
Column[] columns = index.getColumns();
......@@ -883,6 +906,11 @@ public class PageStore implements CacheWriter {
metaIndex.add(database.getSystemSession(), row);
}
/**
* Remove the meta data of an index.
*
* @param index the index to remove
*/
public void removeMeta(Index index) throws SQLException {
Session session = database.getSystemSession();
Row row = metaIndex.getRow(session, index.getId() + 1);
......
h2/src/test/org/h2/test/unit/TestPageStore.java
浏览文件 @ cf22c641
......@@ -15,37 +15,180 @@ import java.io.InputStream;
import java.io.OutputStream;
import java.sql.SQLException;
import java.util.Random;
import org.h2.constant.SysProperties;
import org.h2.engine.ConnectionInfo;
import org.h2.engine.Database;
import org.h2.index.Cursor;
import org.h2.index.Index;
import org.h2.index.IndexType;
import org.h2.index.Page;
import org.h2.index.PageScanIndex;
import org.h2.result.Row;
import org.h2.schema.Schema;
import org.h2.store.PageInputStream;
import org.h2.store.PageOutputStream;
import org.h2.store.PageStore;
import org.h2.table.Column;
import org.h2.table.IndexColumn;
import org.h2.table.TableData;
import org.h2.test.TestBase;
import org.h2.util.IntArray;
import org.h2.util.ObjectArray;
import org.h2.value.Value;
import org.h2.value.ValueInt;
/**
* Test the page store.
*/
public class TestPageStore extends TestBase {
private Database db;
private Schema schema;
private TableData table;
private Index index;
/**
* Run just this test.
*
* @param a ignored
*/
public static void main(String[] a) throws Exception {
System.setProperty("h2.pageStore", "true");
TestBase.createCaller().init().test();
}
public void test() throws Exception {
testAllocateFree();
testStreamFuzz();
testStreamPerformance(false, 1000);
testScanIndex();
testBtreeIndex();
// testAllocateFree();
// testStreamFuzz();
// testStreamPerformance(false, 1000);
// testPerformance(true, 1000000);
// testPerformance(false, 1000000);
}
private void testBtreeIndex() throws SQLException {
if (!SysProperties.PAGE_STORE) {
return;
}
deleteDb("pageStore");
String fileName = getTestDir("/pageStore");
new File(fileName).delete();
File f = new File(fileName + ".dat");
f.delete();
db = getDatabase();
PageStore store = new PageStore(db, fileName, "rw", 8192);
store.setPageSize(1024);
store.open();
openBtreeIndex();
Row row;
for (int i = 10; i < 100; i += 10) {
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(i));
row.setPos(i);
index.add(db.getSystemSession(), row);
}
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(60));
row.setPos(60);
index.remove(db.getSystemSession(), row);
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(60));
row.setPos(60);
index.add(db.getSystemSession(), row);
store.checkpoint();
store.close();
store = new PageStore(db, fileName, "rw", 8192);
store.open();
openBtreeIndex();
Cursor cursor = index.find(db.getSystemSession(), null, null);
for (int i = 10; i < 100; i += 10) {
assertTrue(cursor.next());
Row r = cursor.get();
assertEquals(i, r.getValue(0).getInt());
}
assertFalse(cursor.next());
store.close();
db.shutdownImmediately();
}
private void testScanIndex() throws SQLException {
if (!SysProperties.PAGE_STORE) {
return;
}
deleteDb("pageStore");
String fileName = getTestDir("/pageStore");
new File(fileName).delete();
File f = new File(fileName + ".dat");
f.delete();
db = getDatabase();
PageStore store = new PageStore(db, fileName, "rw", 8192);
store.setPageSize(1024);
store.open();
openScanIndex();
Row row;
for (int i = 10; i < 100; i += 10) {
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(i));
row.setPos(i);
index.add(db.getSystemSession(), row);
}
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(60));
row.setPos(60);
index.remove(db.getSystemSession(), row);
row = table.getTemplateRow();
row.setValue(0, ValueInt.get(60));
row.setPos(60);
index.add(db.getSystemSession(), row);
store.checkpoint();
store.close();
store = new PageStore(db, fileName, "rw", 8192);
store.open();
openScanIndex();
Cursor cursor = index.find(db.getSystemSession(), null, null);
for (int i = 10; i < 100; i += 10) {
assertTrue(cursor.next());
Row r = cursor.get();
assertEquals(i, r.getValue(0).getInt());
}
assertFalse(cursor.next());
store.close();
db.shutdownImmediately();
}
private Database getDatabase() throws SQLException {
String name = getTestDir("/pageStore");
ConnectionInfo ci = new ConnectionInfo(name);
return new Database(name, ci, null);
}
private void openScanIndex() throws SQLException {
ObjectArray cols = new ObjectArray();
cols.add(new Column("ID", Value.INT));
schema = new Schema(db, 0, "", null, true);
table = new TableData(schema, "PAGE_INDEX",
1, cols, true, false, 100);
index = (PageScanIndex) table.getScanIndex(
db.getSystemSession());
}
private void openBtreeIndex() throws SQLException {
ObjectArray cols = new ObjectArray();
cols.add(new Column("ID", Value.INT));
schema = new Schema(db, 0, "", null, true);
int id = db.allocateObjectId(true, true);
table = new TableData(schema, "BTREE_INDEX",
id, cols, true, false, 100);
id = db.allocateObjectId(true, true);
table.addIndex(db.getSystemSession(), "BTREE", id,
IndexColumn.wrap(table.getColumns()),
IndexType.createNonUnique(true),
Index.EMPTY_HEAD, "");
index = (PageScanIndex) table.getScanIndex(
db.getSystemSession());
}
private void testAllocateFree() throws SQLException {
String fileName = getTestDir("/pageStore");
new File(fileName).delete();
......@@ -63,7 +206,7 @@ public class TestPageStore extends TestBase {
}
for (int i = 0; i < size; i++) {
int id = list.get(i);
store.freePage(id);
store.freePage(id, false, null);
}
for (int i = 0; i < size; i++) {
int id = store.allocatePage();
......@@ -76,12 +219,6 @@ public class TestPageStore extends TestBase {
f.delete();
}
private Database getDatabase() throws SQLException {
String name = "mem:pageStore";
ConnectionInfo ci = new ConnectionInfo(name);
return new Database(name, ci, null);
}
private void testStreamPerformance(boolean file, int count) throws Exception {
String fileName = getTestDir("/pageStore");
new File(fileName).delete();
......
Markdown 格式
0% 或
您添加了 0 人 到此讨论。请谨慎行事。
请先完成此评论的编辑！
请 注册 或者 后发表评论