client/src/main/java/com/ibm/crail/conf/CrailConstants.java - incubator-crail - Git at Google

 /*
  * Crail: A Multi-tiered Distributed Direct Access File System
  *
  * Author: Patrick Stuedi <stu@zurich.ibm.com>
  *
  * Copyright (C) 2016, IBM Corporation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  */

 package com.ibm.crail.conf;

 import java.io.IOException;

 import org.slf4j.Logger;

 import com.ibm.crail.utils.CrailUtils;

 public class CrailConstants {
 	private static final Logger LOG = CrailUtils.getLogger();

 	public static final String VERSION_KEY = "crail.version";
 	public static int VERSION = 2990;

 	public static final String DIRECTORY_DEPTH_KEY = "crail.directorydepth";
 	public static int DIRECTORY_DEPTH = 16;

 	public static final String TOKEN_EXPIRATION_KEY = "crail.tokenexpiration";
 	public static long TOKEN_EXPIRATION = 10;

 	public static final String BLOCK_SIZE_KEY = "crail.blocksize";
 	public static long BLOCK_SIZE = 67108864;

 	public static final String CACHE_LIMIT_KEY = "crail.cachelimit";
 	public static long CACHE_LIMIT = 1073741824;

 	public static final String CACHE_PATH_KEY = "crail.cachepath";
 	public static String CACHE_PATH = "/home/stu/craildata/cache";

 	public static final String USER_KEY = "crail.user";
 	public static String USER = "stu";

 	public static final String SHADOW_REPLICATION_KEY = "crail.shadowreplication";
 	public static int SHADOW_REPLICATION = 1;

 	public static final String DEBUG_KEY = "crail.debug";
 	public static boolean DEBUG = false;

 	public static final String STATISTICS_KEY = "crail.statistics";
 	public static boolean STATISTICS = true;

 	public static final String RPC_TIMEOUT_KEY = "crail.rpctimeout";
 	public static int RPC_TIMEOUT = 1000;

 	public static final String DATA_TIMEOUT_KEY = "crail.datatimeout";
 	public static int DATA_TIMEOUT = 1000;

 	public static final String BUFFER_SIZE_KEY = "crail.buffersize";
 	public static int BUFFER_SIZE = 1048576;

 	public static final String SLICE_SIZE_KEY = "crail.slicesize";
 	public static int SLICE_SIZE = 524288;

 	public static final String SINGLETON_KEY = "crail.singleton";
 	public static boolean SINGLETON = false;

 	public static final String REGION_SIZE_KEY = "crail.regionsize";
 	public static long REGION_SIZE = 1073741824;

 	public static final String DIRECTORY_RECORD_KEY = "crail.directoryrecord";
 	public static int DIRECTORY_RECORD = 512;

 	public static final String DIRECTORY_RANDOMIZE_KEY = "crail.directoryrandomize";
 	public static boolean DIRECTORY_RANDOMIZE = true;

 	public static final String CACHE_IMPL_KEY = "crail.cacheimpl";
 	public static String CACHE_IMPL = "com.ibm.crail.memory.MappedBufferCache";

 	public static final String LOCATION_MAP_KEY = "crail.locationmap";
 	public static String LOCATION_MAP = "";

 	//namenode interface
 	public static final String NAMENODE_ADDRESS_KEY = "crail.namenode.address";
 	public static String NAMENODE_ADDRESS = "";

 	public static final String NAMENODE_FILEBLOCKS_KEY = "crail.namenode.fileblocks";
 	public static int NAMENODE_FILEBLOCKS = 16;

 	public static final String NAMENODE_BLOCKSELECTION_KEY = "crail.namenode.blockselection";
 	public static String NAMENODE_BLOCKSELECTION = "roundrobin";

 	public static final String NAMENODE_RPC_TYPE_KEY = "crail.namenode.rpctype";
 	public static String NAMENODE_RPC_TYPE = "com.ibm.crail.namenode.rpc.darpc.DaRPCNameNode";

 	public static final String NAMENODE_RPC_SERVICE_KEY = "crail.namenode.rpcservice";
 	public static String NAMENODE_RPC_SERVICE = "com.ibm.crail.namenode.NameNodeService";

 	//storage interface
 	public static final String STORAGE_TYPES_KEY = "crail.storage.types";
 	public static String STORAGE_TYPES = "com.ibm.crail.storage.rdma.RdmaStorageTier";

 	public static final String STORAGE_CLASSES_KEY = "crail.storage.classes";
 	public static int STORAGE_CLASSES = 1;

 	public static final String STORAGE_ROOTCLASS_KEY = "crail.storage.rootclass";
 	public static int STORAGE_ROOTCLASS = 0;

 	public static void updateConstants(CrailConfiguration conf){
 		//general
 		if (conf.get(DIRECTORY_DEPTH_KEY) != null) {
 			DIRECTORY_DEPTH = Integer.parseInt(conf.get(DIRECTORY_DEPTH_KEY));
 		}
 		if (conf.get(TOKEN_EXPIRATION_KEY) != null) {
 			TOKEN_EXPIRATION = Long.parseLong(conf.get(TOKEN_EXPIRATION_KEY));
 		}
 		if (conf.get(BLOCK_SIZE_KEY) != null) {
 			BLOCK_SIZE = Long.parseLong(conf.get(BLOCK_SIZE_KEY));
 		}
 		if (conf.get(CACHE_LIMIT_KEY) != null) {
 			CACHE_LIMIT = Long.parseLong(conf.get(CACHE_LIMIT_KEY));
 		}
 		if (conf.get(CACHE_PATH_KEY) != null) {
 			CACHE_PATH = conf.get(CACHE_PATH_KEY);
 		}
 		if (conf.get(USER_KEY) != null) {
 			USER = conf.get(CrailConstants.USER_KEY);
 		}
 		if (conf.get(SHADOW_REPLICATION_KEY) != null) {
 			SHADOW_REPLICATION = Integer.parseInt(conf.get(SHADOW_REPLICATION_KEY));
 		}
 		if (conf.get(DEBUG_KEY) != null) {
 			DEBUG = Boolean.parseBoolean(conf.get(DEBUG_KEY));
 		}
 		if (conf.get(STATISTICS_KEY) != null) {
 			STATISTICS = Boolean.parseBoolean(conf.get(STATISTICS_KEY));
 		}
 		if (conf.get(RPC_TIMEOUT_KEY) != null) {
 			RPC_TIMEOUT = Integer.parseInt(conf.get(RPC_TIMEOUT_KEY));
 		}
 		if (conf.get(DATA_TIMEOUT_KEY) != null) {
 			DATA_TIMEOUT = Integer.parseInt(conf.get(DATA_TIMEOUT_KEY));
 		}
 		if (conf.get(BUFFER_SIZE_KEY) != null) {
 			BUFFER_SIZE = Integer.parseInt(conf.get(BUFFER_SIZE_KEY));
 		}
 		if (conf.get(SLICE_SIZE_KEY) != null) {
 			SLICE_SIZE = Integer.parseInt(conf.get(SLICE_SIZE_KEY));
 		}
 		if (conf.get(CrailConstants.SINGLETON_KEY) != null) {
 			SINGLETON = conf.getBoolean(CrailConstants.SINGLETON_KEY, false);
 		}
 		if (conf.get(REGION_SIZE_KEY) != null) {
 			REGION_SIZE = Integer.parseInt(conf.get(REGION_SIZE_KEY));
 		}
 		if (conf.get(DIRECTORY_RECORD_KEY) != null) {
 			DIRECTORY_RECORD = Integer.parseInt(conf.get(DIRECTORY_RECORD_KEY));
 		}
 		if (conf.get(CrailConstants.DIRECTORY_RANDOMIZE_KEY) != null) {
 			DIRECTORY_RANDOMIZE = conf.getBoolean(CrailConstants.DIRECTORY_RANDOMIZE_KEY, false);
 		}
 		if (conf.get(CACHE_IMPL_KEY) != null) {
 			CACHE_IMPL = conf.get(CACHE_IMPL_KEY);
 		}
 		if (conf.get(LOCATION_MAP_KEY) != null) {
 			LOCATION_MAP = conf.get(LOCATION_MAP_KEY);
 		}

 		//namenode interface
 		if (conf.get(NAMENODE_ADDRESS_KEY) != null) {
 			NAMENODE_ADDRESS = conf.get(NAMENODE_ADDRESS_KEY);
 		}
 		if (conf.get(NAMENODE_BLOCKSELECTION_KEY) != null) {
 			NAMENODE_BLOCKSELECTION = conf.get(NAMENODE_BLOCKSELECTION_KEY);
 		}
 		if (conf.get(NAMENODE_FILEBLOCKS_KEY) != null) {
 			NAMENODE_FILEBLOCKS = Integer.parseInt(conf.get(NAMENODE_FILEBLOCKS_KEY));
 		}
 		if (conf.get(NAMENODE_RPC_TYPE_KEY) != null) {
 			NAMENODE_RPC_TYPE = conf.get(NAMENODE_RPC_TYPE_KEY);
 		}

 		//storage interface
 		if (conf.get(STORAGE_TYPES_KEY) != null) {
 			STORAGE_TYPES = conf.get(STORAGE_TYPES_KEY);
 		}
 		if (conf.get(STORAGE_CLASSES_KEY) != null) {
 			STORAGE_CLASSES = Math.max(Integer.parseInt(conf.get(STORAGE_CLASSES_KEY)), CrailUtils.getStorageClasses(STORAGE_TYPES));
 		} else {
 			STORAGE_CLASSES = CrailUtils.getStorageClasses(STORAGE_TYPES);
 		}
 		if (conf.get(STORAGE_ROOTCLASS_KEY) != null) {
 			STORAGE_ROOTCLASS = Integer.parseInt(conf.get(STORAGE_ROOTCLASS_KEY));
 		}
 	}

 	public static void printConf(){
 		LOG.info(VERSION_KEY + " " + VERSION);
 		LOG.info(DIRECTORY_DEPTH_KEY + " " + DIRECTORY_DEPTH);
 		LOG.info(TOKEN_EXPIRATION_KEY + " " + TOKEN_EXPIRATION);
 		LOG.info(BLOCK_SIZE_KEY + " " + BLOCK_SIZE);
 		LOG.info(CACHE_LIMIT_KEY + " " + CACHE_LIMIT);
 		LOG.info(CACHE_PATH_KEY + " " + CACHE_PATH);
 		LOG.info(USER_KEY + " " + USER);
 		LOG.info(SHADOW_REPLICATION_KEY + " " + SHADOW_REPLICATION);
 		LOG.info(DEBUG_KEY + " " + DEBUG);
 		LOG.info(STATISTICS_KEY + " " + STATISTICS);
 		LOG.info(RPC_TIMEOUT_KEY + " " + RPC_TIMEOUT);
 		LOG.info(DATA_TIMEOUT_KEY + " " + DATA_TIMEOUT);
 		LOG.info(BUFFER_SIZE_KEY + " " + BUFFER_SIZE);
 		LOG.info(SLICE_SIZE_KEY + " " + SLICE_SIZE);
 		LOG.info(SINGLETON_KEY + " " + SINGLETON);
 		LOG.info(REGION_SIZE_KEY + " " + REGION_SIZE);
 		LOG.info(DIRECTORY_RECORD_KEY + " " + DIRECTORY_RECORD);
 		LOG.info(DIRECTORY_RANDOMIZE_KEY + " " + DIRECTORY_RANDOMIZE);
 		LOG.info(CACHE_IMPL_KEY + " " + CACHE_IMPL);
 		LOG.info(LOCATION_MAP_KEY + " " + LOCATION_MAP);
 		LOG.info(NAMENODE_BLOCKSELECTION_KEY + " " + NAMENODE_BLOCKSELECTION);
 		LOG.info(NAMENODE_FILEBLOCKS_KEY + " " + NAMENODE_FILEBLOCKS);
 		LOG.info(NAMENODE_RPC_TYPE_KEY + " " + NAMENODE_RPC_TYPE);
 		LOG.info(STORAGE_TYPES_KEY + " " + STORAGE_TYPES);
 		LOG.info(STORAGE_CLASSES_KEY + " " + STORAGE_CLASSES);
 		LOG.info(STORAGE_ROOTCLASS_KEY + " " + STORAGE_ROOTCLASS);
 		LOG.info(NAMENODE_ADDRESS_KEY + " " + NAMENODE_ADDRESS);
 	}

 	public static void verify() throws IOException {
 		if (CrailConstants.BUFFER_SIZE % CrailConstants.DIRECTORY_RECORD != 0){
 			throw new IOException("crail.buffersize must be multiple of " + CrailConstants.DIRECTORY_RECORD);
 		}
 		if (Math.max(CrailConstants.BUFFER_SIZE, CrailConstants.SLICE_SIZE) % Math.min(CrailConstants.BUFFER_SIZE, CrailConstants.SLICE_SIZE) != 0){
 			throw new IOException("crail.slicesize must be multiple of buffersize " + CrailConstants.BUFFER_SIZE);
 		}
 		if (CrailConstants.STORAGE_CLASSES < CrailUtils.getStorageClasses(STORAGE_TYPES)){
 			throw new IOException("crail.storage.classes cannot be smaller than the number of storage types " + CrailUtils.getStorageClasses(STORAGE_TYPES));
 		}

 	}
 }
	/*
	* Crail: A Multi-tiered Distributed Direct Access File System
	*
	* Author: Patrick Stuedi <stu@zurich.ibm.com>
	*
	* Copyright (C) 2016, IBM Corporation
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/

	package com.ibm.crail.conf;

	import java.io.IOException;

	import org.slf4j.Logger;

	import com.ibm.crail.utils.CrailUtils;

	public class CrailConstants {
	private static final Logger LOG = CrailUtils.getLogger();

	public static final String VERSION_KEY = "crail.version";
	public static int VERSION = 2990;

	public static final String DIRECTORY_DEPTH_KEY = "crail.directorydepth";
	public static int DIRECTORY_DEPTH = 16;

	public static final String TOKEN_EXPIRATION_KEY = "crail.tokenexpiration";
	public static long TOKEN_EXPIRATION = 10;

	public static final String BLOCK_SIZE_KEY = "crail.blocksize";
	public static long BLOCK_SIZE = 67108864;

	public static final String CACHE_LIMIT_KEY = "crail.cachelimit";
	public static long CACHE_LIMIT = 1073741824;

	public static final String CACHE_PATH_KEY = "crail.cachepath";
	public static String CACHE_PATH = "/home/stu/craildata/cache";

	public static final String USER_KEY = "crail.user";
	public static String USER = "stu";

	public static final String SHADOW_REPLICATION_KEY = "crail.shadowreplication";
	public static int SHADOW_REPLICATION = 1;

	public static final String DEBUG_KEY = "crail.debug";
	public static boolean DEBUG = false;

	public static final String STATISTICS_KEY = "crail.statistics";
	public static boolean STATISTICS = true;

	public static final String RPC_TIMEOUT_KEY = "crail.rpctimeout";
	public static int RPC_TIMEOUT = 1000;

	public static final String DATA_TIMEOUT_KEY = "crail.datatimeout";
	public static int DATA_TIMEOUT = 1000;

	public static final String BUFFER_SIZE_KEY = "crail.buffersize";
	public static int BUFFER_SIZE = 1048576;

	public static final String SLICE_SIZE_KEY = "crail.slicesize";
	public static int SLICE_SIZE = 524288;

	public static final String SINGLETON_KEY = "crail.singleton";
	public static boolean SINGLETON = false;

	public static final String REGION_SIZE_KEY = "crail.regionsize";
	public static long REGION_SIZE = 1073741824;

	public static final String DIRECTORY_RECORD_KEY = "crail.directoryrecord";
	public static int DIRECTORY_RECORD = 512;

	public static final String DIRECTORY_RANDOMIZE_KEY = "crail.directoryrandomize";
	public static boolean DIRECTORY_RANDOMIZE = true;

	public static final String CACHE_IMPL_KEY = "crail.cacheimpl";
	public static String CACHE_IMPL = "com.ibm.crail.memory.MappedBufferCache";

	public static final String LOCATION_MAP_KEY = "crail.locationmap";
	public static String LOCATION_MAP = "";

	//namenode interface
	public static final String NAMENODE_ADDRESS_KEY = "crail.namenode.address";
	public static String NAMENODE_ADDRESS = "";

	public static final String NAMENODE_FILEBLOCKS_KEY = "crail.namenode.fileblocks";
	public static int NAMENODE_FILEBLOCKS = 16;

	public static final String NAMENODE_BLOCKSELECTION_KEY = "crail.namenode.blockselection";
	public static String NAMENODE_BLOCKSELECTION = "roundrobin";

	public static final String NAMENODE_RPC_TYPE_KEY = "crail.namenode.rpctype";
	public static String NAMENODE_RPC_TYPE = "com.ibm.crail.namenode.rpc.darpc.DaRPCNameNode";

	public static final String NAMENODE_RPC_SERVICE_KEY = "crail.namenode.rpcservice";
	public static String NAMENODE_RPC_SERVICE = "com.ibm.crail.namenode.NameNodeService";

	//storage interface
	public static final String STORAGE_TYPES_KEY = "crail.storage.types";
	public static String STORAGE_TYPES = "com.ibm.crail.storage.rdma.RdmaStorageTier";

	public static final String STORAGE_CLASSES_KEY = "crail.storage.classes";
	public static int STORAGE_CLASSES = 1;

	public static final String STORAGE_ROOTCLASS_KEY = "crail.storage.rootclass";
	public static int STORAGE_ROOTCLASS = 0;

	public static void updateConstants(CrailConfiguration conf){
	//general
	if (conf.get(DIRECTORY_DEPTH_KEY) != null) {
	DIRECTORY_DEPTH = Integer.parseInt(conf.get(DIRECTORY_DEPTH_KEY));
	}
	if (conf.get(TOKEN_EXPIRATION_KEY) != null) {
	TOKEN_EXPIRATION = Long.parseLong(conf.get(TOKEN_EXPIRATION_KEY));
	}
	if (conf.get(BLOCK_SIZE_KEY) != null) {
	BLOCK_SIZE = Long.parseLong(conf.get(BLOCK_SIZE_KEY));
	}
	if (conf.get(CACHE_LIMIT_KEY) != null) {
	CACHE_LIMIT = Long.parseLong(conf.get(CACHE_LIMIT_KEY));
	}
	if (conf.get(CACHE_PATH_KEY) != null) {
	CACHE_PATH = conf.get(CACHE_PATH_KEY);
	}
	if (conf.get(USER_KEY) != null) {
	USER = conf.get(CrailConstants.USER_KEY);
	}
	if (conf.get(SHADOW_REPLICATION_KEY) != null) {
	SHADOW_REPLICATION = Integer.parseInt(conf.get(SHADOW_REPLICATION_KEY));
	}
	if (conf.get(DEBUG_KEY) != null) {
	DEBUG = Boolean.parseBoolean(conf.get(DEBUG_KEY));
	}
	if (conf.get(STATISTICS_KEY) != null) {
	STATISTICS = Boolean.parseBoolean(conf.get(STATISTICS_KEY));
	}
	if (conf.get(RPC_TIMEOUT_KEY) != null) {
	RPC_TIMEOUT = Integer.parseInt(conf.get(RPC_TIMEOUT_KEY));
	}
	if (conf.get(DATA_TIMEOUT_KEY) != null) {
	DATA_TIMEOUT = Integer.parseInt(conf.get(DATA_TIMEOUT_KEY));
	}
	if (conf.get(BUFFER_SIZE_KEY) != null) {
	BUFFER_SIZE = Integer.parseInt(conf.get(BUFFER_SIZE_KEY));
	}
	if (conf.get(SLICE_SIZE_KEY) != null) {
	SLICE_SIZE = Integer.parseInt(conf.get(SLICE_SIZE_KEY));
	}
	if (conf.get(CrailConstants.SINGLETON_KEY) != null) {
	SINGLETON = conf.getBoolean(CrailConstants.SINGLETON_KEY, false);
	}
	if (conf.get(REGION_SIZE_KEY) != null) {
	REGION_SIZE = Integer.parseInt(conf.get(REGION_SIZE_KEY));
	}
	if (conf.get(DIRECTORY_RECORD_KEY) != null) {
	DIRECTORY_RECORD = Integer.parseInt(conf.get(DIRECTORY_RECORD_KEY));
	}
	if (conf.get(CrailConstants.DIRECTORY_RANDOMIZE_KEY) != null) {
	DIRECTORY_RANDOMIZE = conf.getBoolean(CrailConstants.DIRECTORY_RANDOMIZE_KEY, false);
	}
	if (conf.get(CACHE_IMPL_KEY) != null) {
	CACHE_IMPL = conf.get(CACHE_IMPL_KEY);
	}
	if (conf.get(LOCATION_MAP_KEY) != null) {
	LOCATION_MAP = conf.get(LOCATION_MAP_KEY);
	}

	//namenode interface
	if (conf.get(NAMENODE_ADDRESS_KEY) != null) {
	NAMENODE_ADDRESS = conf.get(NAMENODE_ADDRESS_KEY);
	}
	if (conf.get(NAMENODE_BLOCKSELECTION_KEY) != null) {
	NAMENODE_BLOCKSELECTION = conf.get(NAMENODE_BLOCKSELECTION_KEY);
	}
	if (conf.get(NAMENODE_FILEBLOCKS_KEY) != null) {
	NAMENODE_FILEBLOCKS = Integer.parseInt(conf.get(NAMENODE_FILEBLOCKS_KEY));
	}
	if (conf.get(NAMENODE_RPC_TYPE_KEY) != null) {
	NAMENODE_RPC_TYPE = conf.get(NAMENODE_RPC_TYPE_KEY);
	}

	//storage interface
	if (conf.get(STORAGE_TYPES_KEY) != null) {
	STORAGE_TYPES = conf.get(STORAGE_TYPES_KEY);
	}
	if (conf.get(STORAGE_CLASSES_KEY) != null) {
	STORAGE_CLASSES = Math.max(Integer.parseInt(conf.get(STORAGE_CLASSES_KEY)), CrailUtils.getStorageClasses(STORAGE_TYPES));
	} else {
	STORAGE_CLASSES = CrailUtils.getStorageClasses(STORAGE_TYPES);
	}
	if (conf.get(STORAGE_ROOTCLASS_KEY) != null) {
	STORAGE_ROOTCLASS = Integer.parseInt(conf.get(STORAGE_ROOTCLASS_KEY));
	}
	}

	public static void printConf(){
	LOG.info(VERSION_KEY + " " + VERSION);
	LOG.info(DIRECTORY_DEPTH_KEY + " " + DIRECTORY_DEPTH);
	LOG.info(TOKEN_EXPIRATION_KEY + " " + TOKEN_EXPIRATION);
	LOG.info(BLOCK_SIZE_KEY + " " + BLOCK_SIZE);
	LOG.info(CACHE_LIMIT_KEY + " " + CACHE_LIMIT);
	LOG.info(CACHE_PATH_KEY + " " + CACHE_PATH);
	LOG.info(USER_KEY + " " + USER);
	LOG.info(SHADOW_REPLICATION_KEY + " " + SHADOW_REPLICATION);
	LOG.info(DEBUG_KEY + " " + DEBUG);
	LOG.info(STATISTICS_KEY + " " + STATISTICS);
	LOG.info(RPC_TIMEOUT_KEY + " " + RPC_TIMEOUT);
	LOG.info(DATA_TIMEOUT_KEY + " " + DATA_TIMEOUT);
	LOG.info(BUFFER_SIZE_KEY + " " + BUFFER_SIZE);
	LOG.info(SLICE_SIZE_KEY + " " + SLICE_SIZE);
	LOG.info(SINGLETON_KEY + " " + SINGLETON);
	LOG.info(REGION_SIZE_KEY + " " + REGION_SIZE);
	LOG.info(DIRECTORY_RECORD_KEY + " " + DIRECTORY_RECORD);
	LOG.info(DIRECTORY_RANDOMIZE_KEY + " " + DIRECTORY_RANDOMIZE);
	LOG.info(CACHE_IMPL_KEY + " " + CACHE_IMPL);
	LOG.info(LOCATION_MAP_KEY + " " + LOCATION_MAP);
	LOG.info(NAMENODE_BLOCKSELECTION_KEY + " " + NAMENODE_BLOCKSELECTION);
	LOG.info(NAMENODE_FILEBLOCKS_KEY + " " + NAMENODE_FILEBLOCKS);
	LOG.info(NAMENODE_RPC_TYPE_KEY + " " + NAMENODE_RPC_TYPE);
	LOG.info(STORAGE_TYPES_KEY + " " + STORAGE_TYPES);
	LOG.info(STORAGE_CLASSES_KEY + " " + STORAGE_CLASSES);
	LOG.info(STORAGE_ROOTCLASS_KEY + " " + STORAGE_ROOTCLASS);
	LOG.info(NAMENODE_ADDRESS_KEY + " " + NAMENODE_ADDRESS);
	}

	public static void verify() throws IOException {
	if (CrailConstants.BUFFER_SIZE % CrailConstants.DIRECTORY_RECORD != 0){
	throw new IOException("crail.buffersize must be multiple of " + CrailConstants.DIRECTORY_RECORD);
	}
	if (Math.max(CrailConstants.BUFFER_SIZE, CrailConstants.SLICE_SIZE) % Math.min(CrailConstants.BUFFER_SIZE, CrailConstants.SLICE_SIZE) != 0){
	throw new IOException("crail.slicesize must be multiple of buffersize " + CrailConstants.BUFFER_SIZE);
	}
	if (CrailConstants.STORAGE_CLASSES < CrailUtils.getStorageClasses(STORAGE_TYPES)){
	throw new IOException("crail.storage.classes cannot be smaller than the number of storage types " + CrailUtils.getStorageClasses(STORAGE_TYPES));
	}

	}
	}