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h2database
提交 ccbbfb3d authored 作者: Thomas Mueller's avatar Thomas Mueller
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New experimental page store.

上级 dc563c4c
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正在显示 包含 76 行增加 和 41 行删除
h2/src/main/org/h2/store/PageInputStream.java
浏览文件 @ ccbbfb3d
......@@ -6,10 +6,10 @@
*/
package org.h2.store;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.sql.SQLException;
import org.h2.message.Message;
import org.h2.message.Trace;
/**
......@@ -71,7 +71,7 @@ public class PageInputStream extends InputStream {
remaining -= l;
return l;
} catch (SQLException e) {
throw Message.convertToIOException(e);
throw new EOFException();
}
}
......
h2/src/main/org/h2/store/PageLog.java
浏览文件 @ ccbbfb3d
......@@ -61,9 +61,11 @@ public class PageLog {
private Trace trace;
private DataOutputStream out;
private ByteArrayOutputStream buffer;
private PageOutputStream pageOut;
private DataInputStream in;
private int firstTrunkPage;
private int firstDataPage;
private DataPage data;
private int logId, logPos;
private int firstLogId;
......@@ -82,9 +84,13 @@ public class PageLog {
*
* @param firstTrunkPage the first trunk page
*/
void openForWriting(int firstTrunkPage) {
void openForWriting(int firstTrunkPage) throws SQLException {
trace.debug("log openForWriting firstPage:" + firstTrunkPage);
pageOut = new PageOutputStream(store, firstTrunkPage);
pageOut.reserve(1);
store.setLogFirstPage(firstTrunkPage, pageOut.getCurrentDataPageId());
buffer = new ByteArrayOutputStream();
out = new DataOutputStream(buffer);
}
/**
......@@ -95,10 +101,7 @@ public class PageLog {
*/
void openForReading(int firstTrunkPage, int firstDataPage) {
this.firstTrunkPage = firstTrunkPage;
in = new DataInputStream(new PageInputStream(store, firstTrunkPage, firstDataPage));
if (trace.isDebugEnabled()) {
trace.debug("log openForReading firstPage:" + firstTrunkPage);
}
this.firstDataPage = firstDataPage;
}
/**
......@@ -112,6 +115,7 @@ public class PageLog {
if (trace.isDebugEnabled()) {
trace.debug("log recover undo:" + undo);
}
in = new DataInputStream(new PageInputStream(store, firstTrunkPage, firstDataPage));
int logId = 0;
DataPage data = store.createDataPage();
try {
......@@ -209,15 +213,21 @@ public class PageLog {
trace.debug("log undo " + pageId);
}
undo.set(pageId);
pageOut.reserve(store.getPageSize() * 3);
out.write(UNDO);
out.writeInt(pageId);
out.write(page.getBytes(), 0, store.getPageSize());
flushOut();
} catch (IOException e) {
throw Message.convertIOException(e, null);
}
}
private void flushOut() throws IOException {
out.flush();
pageOut.write(buffer.toByteArray());
buffer.reset();
}
/**
* Mark a committed transaction.
*
......@@ -233,9 +243,9 @@ public class PageLog {
// database already closed
return;
}
pageOut.reserve(store.getPageSize());
out.write(COMMIT);
out.writeInt(session.getId());
flushOut();
if (log.getFlushOnEachCommit()) {
flush();
}
......@@ -264,14 +274,13 @@ public class PageLog {
data.reset();
int todoWriteIntoOutputDirectly;
row.write(data);
pageOut.reserve(data.length() + store.getPageSize());
out.write(add ? ADD : REMOVE);
out.writeInt(session.getId());
out.writeInt(tableId);
out.writeInt(row.getPos());
out.writeInt(data.length());
out.write(data.getBytes(), 0, data.length());
flushOut();
} catch (IOException e) {
throw Message.convertIOException(e, null);
}
......@@ -282,7 +291,7 @@ public class PageLog {
*/
void flush() throws SQLException {
try {
out.flush();
pageOut.flush();
} catch (IOException e) {
throw Message.convertIOException(e, null);
}
......
h2/src/main/org/h2/store/PageOutputStream.java
浏览文件 @ ccbbfb3d
......@@ -88,8 +88,8 @@ public class PageOutputStream extends OutputStream {
write(b, 0, b.length);
}
private void initNextData() {
int nextData = trunk == null ? 0 : trunk.getNextDataPage();
private void initNextData() throws SQLException {
int nextData = trunk == null ? -1 : trunk.getNextDataPage();
if (nextData == -1) {
int parent = trunkPageId;
if (trunkNext == 0) {
......@@ -105,9 +105,11 @@ public class PageOutputStream extends OutputStream {
}
trunkNext = reservedPages.get(len);
trunk = new PageStreamTrunk(store, parent, trunkPageId, trunkNext, pageIds);
reservedPages.removeRange(0, len + 1);
trunk.write(null);
reservedPages.removeRange(0, len);
nextData = trunk.getNextDataPage();
}
data = new PageStreamData(store, trunk.getNextDataPage(), trunk.getPos());
data = new PageStreamData(store, nextData, trunk.getPos());
data.initWrite();
}
......@@ -118,12 +120,12 @@ public class PageOutputStream extends OutputStream {
if (writing) {
Message.throwInternalError("writing while still writing");
}
writing = true;
try {
reserve(len);
while (len >= 0) {
writing = true;
while (len > 0) {
int l = data.write(b, off, len);
if (l <= len) {
if (l < len) {
data.write(null);
initNextData();
}
......
h2/src/main/org/h2/store/PageStore.java
浏览文件 @ ccbbfb3d
......@@ -61,9 +61,9 @@ import org.h2.value.ValueString;
* <li>12-15: log data page (initially 5)</li>
* <li>16-23: checksum of bytes 0-15 (CRC32)</li>
* </ul>
* Page 2 contains the first free list page.
* Page 3 contains the meta table root page.
* For a new database, page 4 contains the first log trunk page.
* Page 3 contains the first free list page.
* Page 4 contains the meta table root page.
* For a new database, page 5 contains the first log trunk page.
*/
public class PageStore implements CacheWriter {
......@@ -123,6 +123,7 @@ public class PageStore implements CacheWriter {
private static final int PAGE_ID_FREE_LIST_ROOT = 2;
private static final int PAGE_ID_META_ROOT = 3;
private static final int PAGE_ID_LOG_TRUNK = 5;
private static final int INCREMENT_PAGES = 128;
......@@ -221,27 +222,38 @@ public class PageStore implements CacheWriter {
if (FileUtils.exists(fileName)) {
// existing
file = database.openFile(fileName, accessMode, true);
readHeader();
readStaticHeader();
freeListPagesPerList = PageFreeList.getPagesAddressed(pageSize);
fileLength = file.length();
pageCount = (int) (fileLength / pageSize);
if (pageCount < 6) {
// not enough pages - must be a new database
// that didn't get created correctly
throw Message.getSQLException(ErrorCode.FILE_CORRUPTED_1, fileName);
}
readVariableHeader();
log = new PageLog(this);
log.openForReading(logFirstTrunkPage, logFirstDataPage);
recover(true);
recover(false);
recoveryRunning = true;
log.openForWriting(logFirstTrunkPage);
recoveryRunning = false;
checkpoint();
} else {
// new
setPageSize(PAGE_SIZE_DEFAULT);
freeListPagesPerList = PageFreeList.getPagesAddressed(pageSize);
file = database.openFile(fileName, accessMode, false);
logFirstTrunkPage = 4;
pageCount = 5;
increaseFileSize(INCREMENT_PAGES - pageCount);
recoveryRunning = true;
increaseFileSize(INCREMENT_PAGES);
writeStaticHeader();
log = new PageLog(this);
log.openForWriting(logFirstTrunkPage);
openMetaIndex();
logFirstTrunkPage = allocatePage();
log.openForWriting(logFirstTrunkPage);
systemTableHeadPos = Index.EMPTY_HEAD;
recoveryRunning = false;
}
// lastUsedPage = getFreeList().getLastUsed() + 1;
} catch (SQLException e) {
......@@ -293,7 +305,7 @@ public class PageStore implements CacheWriter {
log.removeUntil(firstUncommittedLog);
}
private void readHeader() throws SQLException {
private void readStaticHeader() throws SQLException {
long length = file.length();
if (length < PAGE_SIZE_MIN * 2) {
throw Message.getSQLException(ErrorCode.FILE_CORRUPTED_1, fileName);
......@@ -317,6 +329,10 @@ public class PageStore implements CacheWriter {
accessMode = "r";
file = database.openFile(fileName, accessMode, true);
}
}
private void readVariableHeader() throws SQLException {
DataPage page = DataPage.create(database, pageSize);
for (int i = 1;; i++) {
if (i == 3) {
throw Message.getSQLException(ErrorCode.FILE_CORRUPTED_1, fileName);
......@@ -385,16 +401,17 @@ public class PageStore implements CacheWriter {
}
private void writeVariableHeader() throws SQLException {
DataPage page = DataPage.create(database, new byte[pageSize]);
DataPage page = DataPage.create(database, pageSize);
page.writeLong(writeCounter);
page.writeInt(logFirstTrunkPage);
page.writeInt(logFirstDataPage);
CRC32 crc = new CRC32();
crc.update(page.getBytes(), 0, 12);
crc.update(page.getBytes(), 0, page.length());
page.writeLong(crc.getValue());
file.seek(pageSize);
file.write(page.getBytes(), 0, page.length());
file.write(page.getBytes(), 0, pageSize);
file.seek(pageSize + pageSize);
file.write(page.getBytes(), 0, page.length());
file.write(page.getBytes(), 0, pageSize);
}
/**
......@@ -413,8 +430,10 @@ public class PageStore implements CacheWriter {
}
public void flushLog() throws SQLException {
if (file != null) {
log.flush();
}
}
public Trace getTrace() {
return trace;
......@@ -478,10 +497,15 @@ public class PageStore implements CacheWriter {
} else {
p = i * freeListPagesPerList;
}
while (p >= pageCount) {
increaseFileSize(INCREMENT_PAGES);
}
PageFreeList list = (PageFreeList) getRecord(p);
if (list == null) {
list = new PageFreeList(this, p);
if (p < pageCount) {
list.read();
}
cache.put(list);
}
return list;
......@@ -515,9 +539,6 @@ public class PageStore implements CacheWriter {
} else {
// TODO could remember the first possible free list page
for (int i = 0;; i++) {
if (i * freeListPagesPerList > pageCount) {
increaseFileSize(INCREMENT_PAGES);
}
PageFreeList list = getFreeList(i);
if (!list.isFull()) {
pos = list.allocate();
......@@ -660,12 +681,13 @@ public class PageStore implements CacheWriter {
*/
private void recover(boolean undo) throws SQLException {
trace.debug("log recover #" + undo);
try {
recoveryRunning = true;
if (!undo) {
openMetaIndex();
readMetaData();
}
try {
recoveryRunning = true;
log.recover(undo);
if (!undo) {
switchLog();
......
h2/src/main/org/h2/store/PageStreamData.java
浏览文件 @ ccbbfb3d
......@@ -43,6 +43,7 @@ public class PageStreamData extends Record {
void read() throws SQLException {
data = store.createDataPage();
store.readPage(getPos(), data);
data.setPos(4);
int t = data.readByte();
if (t != Page.TYPE_STREAM_DATA) {
throw Message.getSQLException(ErrorCode.FILE_CORRUPTED_1, "pos:" + getPos() + " type:" + t +
......
h2/src/main/org/h2/store/PageStreamTrunk.java
浏览文件 @ ccbbfb3d
......@@ -62,6 +62,7 @@ public class PageStreamTrunk extends Record {
}
nextTrunk = data.readInt();
pageCount = data.readInt();
pageIds = new int[pageCount];
for (int i = 0; i < pageCount; i++) {
pageIds[i] = data.readInt();
}
......
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