hdfsEncryptionFileInfo - Information about an encryption file/directory.

hdfsEncryptionZoneInfo- Information about an encryption zone.

hdfsFileInfo - Information about a file/directory.

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.

hdfsBuilderConfSetStr ^⚠

Set a configuration string for an HdfsBuilder.

hdfsBuilderConnect ^⚠

Connect to HDFS using the parameters defined by the builder.

hdfsBuilderSetForceNewInstance ^⚠

Do nothing, we always create a new instance

hdfsBuilderSetKerbTicketCachePath ^⚠

Set the path to the Kerberos ticket cache to use when connecting to the HDFS cluster.

hdfsBuilderSetNameNode ^⚠

Set the HDFS NameNode to connect to.

hdfsBuilderSetNameNodePort ^⚠

Set the port of the HDFS NameNode to connect to.

hdfsBuilderSetToken ^⚠

Set the token used to authenticate

hdfsBuilderSetUserName ^⚠

Set the username to use when connecting to the HDFS cluster.

hdfsCancelDelegationToken ^⚠

Cancel a delegation token.

hdfsChmod ^⚠

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

hdfsChown ^⚠

Change the user and/or group of a file or directory.

hdfsCloseFile ^⚠

hdfsCloseFile - Close an open file. @param fs The configured filesystem handle. @param file The file handle. @return Returns 0 on success, -1 on error. On error, errno will be set appropriately. If the hdfs file was valid, the memory associated with it will be freed at the end of this call, even if there was an I/O error.

hdfsConfGetInt ^⚠

Get a configuration integer.

hdfsConfGetStr ^⚠

Get a configuration string.

hdfsConfStrFree ^⚠

Free a configuration string found with hdfsConfGetStr.

hdfsConnect ^⚠

hdfsConnect - Connect to a hdfs file system. Connect to the hdfs. @param nn The NameNode. See hdfsBuilderSetNameNode for details. @param port The port on which the server is listening. @return Returns a handle to the filesystem or NULL on error. @deprecated Use hdfsBuilderConnect instead.

hdfsConnectAsUser ^⚠

hdfsConnectAsUser - Connect to a hdfs file system as a specific user Connect to the hdfs. @param nn The NameNode. See hdfsBuilderSetNameNode for details. @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) @return Returns a handle to the filesystem or NULL on error. @deprecated Use hdfsBuilderConnect instead.

hdfsConnectAsUserNewInstance ^⚠

hdfsConnect - Connect to an hdfs file system.

hdfsConnectNewInstance ^⚠

hdfsConnect - Connect to an hdfs file system.

hdfsCopy ^⚠

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.

hdfsCreateDirectory ^⚠

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.

hdfsCreateEncryptionZone ^⚠

Create encryption zone for the directory with specific key name @param fs The configured filesystem handle. @param path The path of the directory. @param keyname The key name of the encryption zone @return Returns 0 on success, -1 on error.

hdfsDelete ^⚠

hdfsDelete - Delete file. @param fs The configured filesystem handle. @param path The path of the file. @param recursive if path is a directory and set to non-zero, the directory is deleted else throws an exception. In case of a file the recursive argument is irrelevant. @return Returns 0 on success, -1 on error.

hdfsDisconnect ^⚠

hdfsDisconnect - Disconnect from the hdfs file system. Disconnect from hdfs. @param fs The configured filesystem handle. @return Returns 0 on success, -1 on error. Even if there is an error, the resources associated with the hdfsFS will be freed.

hdfsExists ^⚠

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 success, -1 on error.

hdfsFileIsOpenForRead ^⚠

Determine if a file is open for read.

hdfsFileIsOpenForWrite ^⚠

Determine if a file is open for write.

hdfsFlush ^⚠

hdfsWrite - Flush the data. @param fs The configured filesystem handle. @param file The file handle. @return Returns 0 on success, -1 on error.

hdfsFreeBuilder ^⚠

Free an HDFS builder.

hdfsFreeDelegationToken ^⚠

Free a delegation token.

hdfsFreeEncryptionZoneInfo ^⚠

hdfsFreeEncryptionZoneInfo - Free up the hdfsEncryptionZoneInfo array (including fields) @param infos The array of dynamically-allocated hdfsEncryptionZoneInfo objects. @param numEntries The size of the array.

hdfsFreeFileBlockLocations ^⚠

Free the BlockLocation array returned by hdfsGetFileBlockLocations

hdfsFreeFileInfo ^⚠

hdfsFreeFileInfo - Free up the hdfsFileInfo array (including fields) @param infos The array of dynamically-allocated hdfsFileInfo objects. @param numEntries The size of the array.

hdfsFreeHosts ^⚠

hdfsFreeHosts - Free up the structure returned by hdfsGetHosts @param hdfsFileInfo The array of dynamically-allocated hdfsFileInfo objects. @param numEntries The size of the array.

hdfsFreeNamenodeInformation ^⚠

Free the array returned by hdfsGetConfiguredNamenodes()

hdfsGetCapacity ^⚠

hdfsGetCapacity - Return the raw capacity of the filesystem. @param fs The configured filesystem handle. @return Returns the raw-capacity; -1 on error.

hdfsGetDefaultBlockSize ^⚠

hdfsGetDefaultBlockSize - Get the default blocksize.

hdfsGetDelegationToken ^⚠

Get a delegation token from namenode. The token should be freed using hdfsFreeDelegationToken after canceling the token or token expired.

hdfsGetEZForPath ^⚠

hdfsEncryptionZoneInfo - Get information about a path as a (dynamically allocated) single hdfsEncryptionZoneInfo struct. hdfsEncryptionZoneInfo should be called when the pointer is no longer needed. @param fs The configured filesystem handle. @param path The path of the encryption zone. @return Returns a dynamically-allocated hdfsEncryptionZoneInfo object; NULL on error.

hdfsGetFileBlockLocations ^⚠

Get an array containing hostnames, offset and size of portions of the given file.

hdfsGetHANamenodes ^⚠

If hdfs is configured with HA namenode, return all namenode informations as an array. Else return NULL.

hdfsGetHANamenodesWithConfig ^⚠

If hdfs is configured with HA namenode, return all namenode informations as an array. Else return NULL.

hdfsGetHosts ^⚠

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.

hdfsGetLastError ^⚠

Return error information of last failed operation.

hdfsGetPathInfo ^⚠

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.

hdfsGetUsed ^⚠

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.

hdfsGetWorkingDirectory ^⚠

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.

hdfsHFlush ^⚠

hdfsHFlush - Flush out the data in client’s user buffer. After the return of this call, new readers will see the data. @param fs configured filesystem handle @param file file handle @return 0 on success, -1 on error and sets errno

hdfsListDirectory ^⚠

hdfsListDirectory - Get list of files/directories for a given directory-path. hdfsFreeFileInfo should be called to deallocate memory. @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 on error.

hdfsListEncryptionZones ^⚠

hdfsEncryptionZoneInfo - Get list of all the encryption zones. hdfsFreeEncryptionZoneInfo should be called to deallocate memory. @param fs The configured filesystem handle. @return Returns a dynamically-allocated array of hdfsEncryptionZoneInfo objects; NULL on error.

hdfsMove ^⚠

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.

hdfsNewBuilder ^⚠

Create an HDFS builder.

hdfsOpenFile ^⚠

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 and O_SYNC. 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.

hdfsRead ^⚠

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 On success, a positive number indicating how many bytes were read. On end-of-file, 0. On error, -1. Errno will be set to the error code. Just like the POSIX read function, hdfsRead will return -1 and set errno to EINTR if data is temporarily unavailable, but we are not yet at the end of the file.

hdfsRename ^⚠

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.

hdfsRenewDelegationToken ^⚠

Renew a delegation token.

hdfsSeek ^⚠

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.

hdfsSetReplication ^⚠

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.

hdfsSetWorkingDirectory ^⚠

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.

hdfsSync ^⚠

hdfsSync - Flush out and sync the data in client’s user buffer. After the return of this call, new readers will see the data. @param fs configured filesystem handle @param file file handle @return 0 on success, -1 on error and sets errno

hdfsTell ^⚠

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.

hdfsTruncate ^⚠

hdfsTruncate - Truncate the file in the indicated path to the indicated size. @param fs The configured filesystem handle. @param path the path to the file. @param pos the position the file will be truncated to. @param shouldWait output value, true if and client does not need to wait for block recovery, false if client needs to wait for block recovery.

hdfsUtime ^⚠

hdfsUtime @param fs The configured filesystem handle. @param path the path to the file or directory @param mtime new modification time or -1 for no change @param atime new access time or -1 for no change @return 0 on success else -1

hdfsWrite ^⚠

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.