| Storage Repository Abstraction Dec 2003 | ||||||
| Reagan W. Moore | ||||||
| San Diego Supercomputer Center | ||||||
| A comparison of the function calls issued by five different systems has been conducted | ||||||
| (Dec 2002). The systems include the Storage Resource Broker (SRB), Condor (Chirp), | ||||||
| dCache access protocol (DCCP), RFIO functions used in Root, and the MPI-IO access functions. | ||||||
| Each system implements a set of C library calls, which use the specified operation prepended | ||||||
| by a C library call prefix. (For example srbopen, client.open, dc_open, rfio_open, MPI_FILE_open) | ||||||
| An "x" in a cell of the following table indicates that the function is provided. | ||||||
| Application I/O support | SRB | Chirp | DCCP | RFIO | RIO/MPI-IO | |
| Operations | ||||||
| C library call prefix | srbFilecall | client.call | dc_call | rfio_call | MPI_FILE_call | |
| create | x | x | ||||
| open | x | x | x | x | x | |
| close | x | x | x | x | x | |
| unlink | x | x | P | |||
| read | x | x | x | x | x | |
| write | x | x | x | P | x | |
| lseek | seek | x | x | |||
| write_at | x | |||||
| read_at | x | |||||
| fopen | x | x | ||||
| fread | x | x | ||||
| fwrite | x | x | ||||
| fclose | x | x | ||||
| fseek | x | |||||
| sync | x | |||||
| stat | x | |||||
| fstat | x | |||||
| mkdir | x | |||||
| rmdir | x | |||||
| chmod | x | |||||
| opendir | x | |||||
| closedir | x | |||||
| readdir | x | |||||
| perror | x | x | ||||
| pread | x | |||||
| close2 | x | |||||
| setReplyHostName | x | |||||
| getDcapVersion | x | |||||
| setDebugLevel | x | |||||
| debug | x | |||||
| sterror | x | |||||
| noBuffering | x | |||||
| setBufferSize | implicit | x | ||||
| stage | x | x | ||||
| rename | x | x | ||||
| move | x | |||||
| copy | x | |||||
| replicate | x | |||||
| delete | x | x | ||||
| set_size | x | |||||
| preallocate | x | |||||
| get_size | x | |||||
| check | x | |||||
| unsafeWrite | x | |||||
| access | P | |||||
| parse | P | |||||