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hdfs cleanup and compile test against CDH 4.4.

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Mike Orr 11 years ago
parent bd1105aa5a
commit c2fda55cfe
7 changed files with 52 additions and 497 deletions
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  1. 2
      build_tools/build_detect_platform
  2. 13
      hdfs/README
  3. 2
      hdfs/env_hdfs.h
  4. 477
      hdfs/hdfs.h
  5. BIN
      hdfs/libhdfs.a
  6. 7
      hdfs/setup.sh
  7. 48
      util/env_hdfs.cc

2
build_tools/build_detect_platform
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@ -289,7 +289,7 @@ if test "$USE_HDFS"; then
exit 1
fi
HDFS_CCFLAGS="$HDFS_CCFLAGS -I$JAVA_HOME/include -I$JAVA_HOME/include/linux -DUSE_HDFS"
HDFS_LDFLAGS="$HDFS_LDFLAGS -Wl,--no-whole-archive hdfs/libhdfs.a -L$JAVA_HOME/jre/lib/amd64"
HDFS_LDFLAGS="$HDFS_LDFLAGS -Wl,--no-whole-archive -lhdfs -L$JAVA_HOME/jre/lib/amd64"
HDFS_LDFLAGS="$HDFS_LDFLAGS -L$JAVA_HOME/jre/lib/amd64/server -L$GLIBC_RUNTIME_PATH/lib"
HDFS_LDFLAGS="$HDFS_LDFLAGS -ldl -lverify -ljava -ljvm"
COMMON_FLAGS="$COMMON_FLAGS $HDFS_CCFLAGS"

13
hdfs/README
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@ -1,19 +1,16 @@
This directory contains the hdfs extensions needed to make rocksdb store
files in HDFS.
The hdfs.h file is copied from the Apache Hadoop 1.0 source code.
It defines the libhdfs library
(http://hadoop.apache.org/common/docs/r0.20.2/libhdfs.html) to access
data in HDFS. The libhdfs.a is copied from the Apache Hadoop 1.0 build.
It implements the API defined in hdfs.h. If your hadoop cluster is running
a different hadoop release, then install these two files manually from your
hadoop distribution and then recompile rocksdb.
It has been compiled and testing against CDH 4.4 (2.0.0+1475-1.cdh4.4.0.p0.23~precise-cdh4.4.0).
The configuration assumes that packages libhdfs0, libhdfs0-dev are
installed which basically means that hdfs.h is in /usr/include and libhdfs in /usr/lib
The env_hdfs.h file defines the rocksdb objects that are needed to talk to an
underlying filesystem.
If you want to compile rocksdb with hdfs support, please set the following
enviroment variables appropriately:
enviroment variables appropriately (also defined in setup.sh for convenience)
USE_HDFS=1
JAVA_HOME=/usr/local/jdk-6u22-64
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/jdk-6u22-64/jre/lib/amd64/server:/usr/local/jdk-6u22-64/jre/lib/amd64/:./snappy/libs

2
hdfs/env_hdfs.h
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@ -14,7 +14,7 @@
#include "rocksdb/status.h"
#ifdef USE_HDFS
#include "hdfs/hdfs.h"
#include <hdfs.h>
namespace rocksdb {

477
hdfs/hdfs.h
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@ -1,477 +0,0 @@
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#ifndef LIBHDFS_HDFS_H
#define LIBHDFS_HDFS_H
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>
#include <jni.h>
#ifndef O_RDONLY
#define O_RDONLY 1
#endif
#ifndef O_WRONLY
#define O_WRONLY 2
#endif
#ifndef EINTERNAL
#define EINTERNAL 255
#endif
/** All APIs set errno to meaningful values */
#ifdef __cplusplus
extern "C" {
#endif
/**
* Some utility decls used in libhdfs.
*/
typedef int32_t tSize; /// size of data for read/write io ops
typedef time_t tTime; /// time type in seconds
typedef int64_t tOffset;/// offset within the file
typedef uint16_t tPort; /// port
typedef enum tObjectKind {
kObjectKindFile = 'F',
kObjectKindDirectory = 'D',
} tObjectKind;
/**
* The C reflection of org.apache.org.hadoop.FileSystem .
*/
typedef void* hdfsFS;
/**
* The C equivalent of org.apache.org.hadoop.FSData(Input|Output)Stream .
*/
enum hdfsStreamType
{
UNINITIALIZED = 0,
INPUT = 1,
OUTPUT = 2,
};
/**
* The 'file-handle' to a file in hdfs.
*/
struct hdfsFile_internal {
void* file;
enum hdfsStreamType type;
};
typedef struct hdfsFile_internal* hdfsFile;
/**
* hdfsConnectAsUser - Connect to a hdfs file system as a specific user
* Connect to the hdfs.
* @param host A string containing either a host name, or an ip address
* of the namenode of a hdfs cluster. 'host' should be passed as NULL if
* you want to connect to local filesystem. 'host' should be passed as
* 'default' (and port as 0) to used the 'configured' filesystem
* (core-site/core-default.xml).
* @param port The port on which the server is listening.
* @param user the user name (this is hadoop domain user). Or NULL is equivelant to hhdfsConnect(host, port)
* @param groups the groups (these are hadoop domain groups)
* @return Returns a handle to the filesystem or NULL on error.
*/
hdfsFS hdfsConnectAsUser(const char* host, tPort port, const char *user , const char *groups[], int groups_size );
/**
* hdfsConnect - Connect to a hdfs file system.
* Connect to the hdfs.
* @param host A string containing either a host name, or an ip address
* of the namenode of a hdfs cluster. 'host' should be passed as NULL if
* you want to connect to local filesystem. 'host' should be passed as
* 'default' (and port as 0) to used the 'configured' filesystem
* (core-site/core-default.xml).
* @param port The port on which the server is listening.
* @return Returns a handle to the filesystem or NULL on error.
*/
hdfsFS hdfsConnect(const char* host, tPort port);
/**
* This are the same as hdfsConnectAsUser except that every invocation returns a new FileSystem handle.
* Applications should call a hdfsDisconnect for every call to hdfsConnectAsUserNewInstance.
*/
hdfsFS hdfsConnectAsUserNewInstance(const char* host, tPort port, const char *user , const char *groups[], int groups_size );
hdfsFS hdfsConnectNewInstance(const char* host, tPort port);
hdfsFS hdfsConnectPath(const char* uri);
/**
* hdfsDisconnect - Disconnect from the hdfs file system.
* Disconnect from hdfs.
* @param fs The configured filesystem handle.
* @return Returns 0 on success, -1 on error.
*/
int hdfsDisconnect(hdfsFS fs);
/**
* hdfsOpenFile - Open a hdfs file in given mode.
* @param fs The configured filesystem handle.
* @param path The full path to the file.
* @param flags - an | of bits/fcntl.h file flags - supported flags are O_RDONLY, O_WRONLY (meaning create or overwrite i.e., implies O_TRUNCAT),
* O_WRONLY|O_APPEND. Other flags are generally ignored other than (O_RDWR || (O_EXCL & O_CREAT)) which return NULL and set errno equal ENOTSUP.
* @param bufferSize Size of buffer for read/write - pass 0 if you want
* to use the default configured values.
* @param replication Block replication - pass 0 if you want to use
* the default configured values.
* @param blocksize Size of block - pass 0 if you want to use the
* default configured values.
* @return Returns the handle to the open file or NULL on error.
*/
hdfsFile hdfsOpenFile(hdfsFS fs, const char* path, int flags,
int bufferSize, short replication, tSize blocksize);
/**
* hdfsCloseFile - Close an open file.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @return Returns 0 on success, -1 on error.
*/
int hdfsCloseFile(hdfsFS fs, hdfsFile file);
/**
* hdfsExists - Checks if a given path exsits on the filesystem
* @param fs The configured filesystem handle.
* @param path The path to look for
* @return Returns 0 on exists, 1 on non-exists, -1/-2 on error.
*/
int hdfsExists(hdfsFS fs, const char *path);
/**
* hdfsSeek - Seek to given offset in file.
* This works only for files opened in read-only mode.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @param desiredPos Offset into the file to seek into.
* @return Returns 0 on success, -1 on error.
*/
int hdfsSeek(hdfsFS fs, hdfsFile file, tOffset desiredPos);
/**
* hdfsTell - Get the current offset in the file, in bytes.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @return Current offset, -1 on error.
*/
tOffset hdfsTell(hdfsFS fs, hdfsFile file);
/**
* hdfsRead - Read data from an open file.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @param buffer The buffer to copy read bytes into.
* @param length The length of the buffer.
* @return Returns the number of bytes actually read, possibly less
* than than length;-1 on error.
*/
tSize hdfsRead(hdfsFS fs, hdfsFile file, void* buffer, tSize length);
/**
* hdfsPread - Positional read of data from an open file.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @param position Position from which to read
* @param buffer The buffer to copy read bytes into.
* @param length The length of the buffer.
* @return Returns the number of bytes actually read, possibly less than
* than length;-1 on error.
*/
tSize hdfsPread(hdfsFS fs, hdfsFile file, tOffset position,
void* buffer, tSize length);
/**
* hdfsWrite - Write data into an open file.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @param buffer The data.
* @param length The no. of bytes to write.
* @return Returns the number of bytes written, -1 on error.
*/
tSize hdfsWrite(hdfsFS fs, hdfsFile file, const void* buffer,
tSize length);
/**
* hdfsWrite - Flush the data.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @return Returns 0 on success, -1 on error.
*/
int hdfsFlush(hdfsFS fs, hdfsFile file);
/**
* hdfsSync - Sync the data to persistent store.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @return Returns 0 on success, -1 on error.
*/
int hdfsSync(hdfsFS fs, hdfsFile file);
/**
* hdfsGetNumReplicasInPipeline - get number of remaining replicas in
* pipeline
* @param fs The configured filesystem handle
* @param file the file handle
* @return returns the # of datanodes in the write pipeline; -1 on error
*/
int hdfsGetNumCurrentReplicas(hdfsFS, hdfsFile file);
/**
* hdfsAvailable - Number of bytes that can be read from this
* input stream without blocking.
* @param fs The configured filesystem handle.
* @param file The file handle.
* @return Returns available bytes; -1 on error.
*/
int hdfsAvailable(hdfsFS fs, hdfsFile file);
/**
* hdfsCopy - Copy file from one filesystem to another.
* @param srcFS The handle to source filesystem.
* @param src The path of source file.
* @param dstFS The handle to destination filesystem.
* @param dst The path of destination file.
* @return Returns 0 on success, -1 on error.
*/
int hdfsCopy(hdfsFS srcFS, const char* src, hdfsFS dstFS, const char* dst);
/**
* hdfsMove - Move file from one filesystem to another.
* @param srcFS The handle to source filesystem.
* @param src The path of source file.
* @param dstFS The handle to destination filesystem.
* @param dst The path of destination file.
* @return Returns 0 on success, -1 on error.
*/
int hdfsMove(hdfsFS srcFS, const char* src, hdfsFS dstFS, const char* dst);
/**
* hdfsDelete - Delete file.
* @param fs The configured filesystem handle.
* @param path The path of the file.
* @return Returns 0 on success, -1 on error.
*/
int hdfsDelete(hdfsFS fs, const char* path);
/**
* hdfsRename - Rename file.
* @param fs The configured filesystem handle.
* @param oldPath The path of the source file.
* @param newPath The path of the destination file.
* @return Returns 0 on success, -1 on error.
*/
int hdfsRename(hdfsFS fs, const char* oldPath, const char* newPath);
/**
* hdfsGetWorkingDirectory - Get the current working directory for
* the given filesystem.
* @param fs The configured filesystem handle.
* @param buffer The user-buffer to copy path of cwd into.
* @param bufferSize The length of user-buffer.
* @return Returns buffer, NULL on error.
*/
char* hdfsGetWorkingDirectory(hdfsFS fs, char *buffer, size_t bufferSize);
/**
* hdfsSetWorkingDirectory - Set the working directory. All relative
* paths will be resolved relative to it.
* @param fs The configured filesystem handle.
* @param path The path of the new 'cwd'.
* @return Returns 0 on success, -1 on error.
*/
int hdfsSetWorkingDirectory(hdfsFS fs, const char* path);
/**
* hdfsCreateDirectory - Make the given file and all non-existent
* parents into directories.
* @param fs The configured filesystem handle.
* @param path The path of the directory.
* @return Returns 0 on success, -1 on error.
*/
int hdfsCreateDirectory(hdfsFS fs, const char* path);
/**
* hdfsSetReplication - Set the replication of the specified
* file to the supplied value
* @param fs The configured filesystem handle.
* @param path The path of the file.
* @return Returns 0 on success, -1 on error.
*/
int hdfsSetReplication(hdfsFS fs, const char* path, int16_t replication);
/**
* hdfsFileInfo - Information about a file/directory.
*/
typedef struct {
tObjectKind mKind; /* file or directory */
char *mName; /* the name of the file */
tTime mLastMod; /* the last modification time for the file in seconds */
tOffset mSize; /* the size of the file in bytes */
short mReplication; /* the count of replicas */
tOffset mBlockSize; /* the block size for the file */
char *mOwner; /* the owner of the file */
char *mGroup; /* the group associated with the file */
short mPermissions; /* the permissions associated with the file */
tTime mLastAccess; /* the last access time for the file in seconds */
} hdfsFileInfo;
/**
* hdfsListDirectory - Get list of files/directories for a given
* directory-path. hdfsFreeFileInfo should be called to deallocate memory if
* the function returns non-NULL value.
* @param fs The configured filesystem handle.
* @param path The path of the directory.
* @param numEntries Set to the number of files/directories in path.
* @return Returns a dynamically-allocated array of hdfsFileInfo
* objects; NULL if empty or on error.
* on error, numEntries will be -1.
*/
hdfsFileInfo *hdfsListDirectory(hdfsFS fs, const char* path,
int *numEntries);
/**
* hdfsGetPathInfo - Get information about a path as a (dynamically
* allocated) single hdfsFileInfo struct. hdfsFreeFileInfo should be
* called when the pointer is no longer needed.
* @param fs The configured filesystem handle.
* @param path The path of the file.
* @return Returns a dynamically-allocated hdfsFileInfo object;
* NULL on error.
*/
hdfsFileInfo *hdfsGetPathInfo(hdfsFS fs, const char* path);
/**
* hdfsFreeFileInfo - Free up the hdfsFileInfo array (including fields)
* @param hdfsFileInfo The array of dynamically-allocated hdfsFileInfo
* objects.
* @param numEntries The size of the array.
*/
void hdfsFreeFileInfo(hdfsFileInfo *hdfsFileInfo, int numEntries);
/**
* hdfsGetHosts - Get hostnames where a particular block (determined by
* pos & blocksize) of a file is stored. The last element in the array
* is NULL. Due to replication, a single block could be present on
* multiple hosts.
* @param fs The configured filesystem handle.
* @param path The path of the file.
* @param start The start of the block.
* @param length The length of the block.
* @return Returns a dynamically-allocated 2-d array of blocks-hosts;
* NULL on error.
*/
char*** hdfsGetHosts(hdfsFS fs, const char* path,
tOffset start, tOffset length);
/**
* hdfsFreeHosts - Free up the structure returned by hdfsGetHosts
* @param hdfsFileInfo The array of dynamically-allocated hdfsFileInfo
* objects.
* @param numEntries The size of the array.
*/
void hdfsFreeHosts(char ***blockHosts);
/**
* hdfsGetDefaultBlockSize - Get the optimum blocksize.
* @param fs The configured filesystem handle.
* @return Returns the blocksize; -1 on error.
*/
tOffset hdfsGetDefaultBlockSize(hdfsFS fs);
/**
* hdfsGetCapacity - Return the raw capacity of the filesystem.
* @param fs The configured filesystem handle.
* @return Returns the raw-capacity; -1 on error.
*/
tOffset hdfsGetCapacity(hdfsFS fs);
/**
* hdfsGetUsed - Return the total raw size of all files in the filesystem.
* @param fs The configured filesystem handle.
* @return Returns the total-size; -1 on error.
*/
tOffset hdfsGetUsed(hdfsFS fs);
/**
* hdfsChown
* @param fs The configured filesystem handle.
* @param path the path to the file or directory
* @param owner this is a string in Hadoop land. Set to null or "" if only setting group
* @param group this is a string in Hadoop land. Set to null or "" if only setting user
* @return 0 on success else -1
*/
int hdfsChown(hdfsFS fs, const char* path, const char *owner, const char *group);
/**
* hdfsChmod
* @param fs The configured filesystem handle.
* @param path the path to the file or directory
* @param mode the bitmask to set it to
* @return 0 on success else -1
*/
int hdfsChmod(hdfsFS fs, const char* path, short mode);
/**
* hdfsUtime
* @param fs The configured filesystem handle.
* @param path the path to the file or directory
* @param mtime new modification time or 0 for only set access time in seconds
* @param atime new access time or 0 for only set modification time in seconds
* @return 0 on success else -1
*/
int hdfsUtime(hdfsFS fs, const char* path, tTime mtime, tTime atime);
#ifdef __cplusplus
}
#endif
#endif /*LIBHDFS_HDFS_H*/
/**
* vim: ts=4: sw=4: et
*/

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hdfs/libhdfs.a
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7
hdfs/setup.sh
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@ -0,0 +1,7 @@
export USE_HDFS=1
export LD_LIBRARY_PATH=$JAVA_HOME/jre/lib/amd64/server:$JAVA_HOME/jre/lib/amd64:/usr/lib/hadoop/lib/native
export CLASSPATH=
for f in `find /usr/lib/hadoop-hdfs | grep jar`; do export CLASSPATH=$CLASSPATH:$f; done
for f in `find /usr/lib/hadoop | grep jar`; do export CLASSPATH=$CLASSPATH:$f; done
for f in `find /usr/lib/hadoop/client | grep jar`; do export CLASSPATH=$CLASSPATH:$f; done

48
util/env_hdfs.cc
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@ -15,11 +15,11 @@
#include <sstream>
#include "rocksdb/env.h"
#include "rocksdb/status.h"
#include "hdfs/hdfs.h"
#include "hdfs/env_hdfs.h"
#define HDFS_EXISTS 0
#define HDFS_DOESNT_EXIST 1
#define HDFS_DOESNT_EXIST -1
#define HDFS_SUCCESS 0
//
// This file defines an HDFS environment for rocksdb. It uses the libhdfs
@ -223,7 +223,7 @@ class HdfsWritableFile: public WritableFile {
if (hdfsFlush(fileSys_, hfile_) == -1) {
return IOError(filename_, errno);
}
if (hdfsSync(fileSys_, hfile_) == -1) {
if (hdfsHSync(fileSys_, hfile_) == -1) {
return IOError(filename_, errno);
}
Log(mylog, "[hdfs] HdfsWritableFile Synced %s\n", filename_.c_str());
@ -398,12 +398,40 @@ Status HdfsEnv::NewRandomRWFile(const std::string& fname,
return Status::NotSupported("NewRandomRWFile not supported on HdfsEnv");
}
class HdfsDirectory : public Directory {
public:
explicit HdfsDirectory(int fd) : fd_(fd) {}
~HdfsDirectory() {
//close(fd_);
}
virtual Status Fsync() {
//if (fsync(fd_) == -1) {
// return IOError("directory", errno);
// }
return Status::OK();
}
private:
int fd_;
};
Status HdfsEnv::NewDirectory(const std::string& name,
unique_ptr<Directory>* result) {
return Status::NotSupported("NewDirectory not supported on HdfsEnv");
int value = hdfsCreateDirectory(fileSys_, name.c_str());
result->reset(new HdfsDirectory(0));
switch (value) {
case HDFS_SUCCESS: // directory created
return Status::OK();
default:
Log(mylog, "directory already exists ");
return Status::OK();
}
}
bool HdfsEnv::FileExists(const std::string& fname) {
int value = hdfsExists(fileSys_, fname.c_str());
switch (value) {
case HDFS_EXISTS:
@ -412,8 +440,8 @@ bool HdfsEnv::FileExists(const std::string& fname) {
return false;
default: // anything else should be an error
Log(mylog, "FileExists hdfsExists call failed");
throw HdfsFatalException("hdfsExists call failed with error " +
std::to_string(value) + ".\n");
throw HdfsFatalException("1. hdfsExists call failed with error " +
std::to_string(value) + " on path " + fname + ".\n");
}
}
@ -449,13 +477,13 @@ Status HdfsEnv::GetChildren(const std::string& path,
default: // anything else should be an error
Log(mylog, "GetChildren hdfsExists call failed");
throw HdfsFatalException("hdfsExists call failed with error " +
std::to_string(value) + ".\n");
std::to_string(value) + " on path " + path.c_str() + ".\n");
}
return Status::OK();
}
Status HdfsEnv::DeleteFile(const std::string& fname) {
if (hdfsDelete(fileSys_, fname.c_str()) == 0) {
if (hdfsDelete(fileSys_, fname.c_str(),1) == 0) {
return Status::OK();
}
return IOError(fname, errno);
@ -478,7 +506,7 @@ Status HdfsEnv::CreateDirIfMissing(const std::string& name) {
return CreateDir(name);
default: // anything else should be an error
Log(mylog, "CreateDirIfMissing hdfsExists call failed");
throw HdfsFatalException("hdfsExists call failed with error " +
throw HdfsFatalException("3. hdfsExists call failed with error " +
std::to_string(value) + ".\n");
}
};
@ -514,7 +542,7 @@ Status HdfsEnv::GetFileModificationTime(const std::string& fname,
// target already exists. So, we delete the target before attemting the
// rename.
Status HdfsEnv::RenameFile(const std::string& src, const std::string& target) {
hdfsDelete(fileSys_, target.c_str());
hdfsDelete(fileSys_, target.c_str(), 1);
if (hdfsRename(fileSys_, src.c_str(), target.c_str()) == 0) {
return Status::OK();
}

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