MDHIM - Multi-Dimensional Hashing Indexing Middleware

This version of MDHIM package is customized to support UnifyFS. In order to test these extended interfaces and implementations, two test files are provided in the directory tests/singletests (range_bget.c and range_test.c). The test scripts for these two files are range_bget.sh range_test.sh.

MDHIM is a parallel key/value store framework written in MPI. Unlike other big data solutions, MDHIM has been designed for an HPC environment and to take advantage of high speed networks.

1. cd tests
2. Type: make
3. If all went well, you have all the tests compiled

Typical setup to run file: ./mdhimtst -ftest.txt -q -t5 -d3 -r0~2 -w1 -p ./

Typical batch file setup:

put single_insert.txt get single_insertget.txt del single_insertdel.txt

Batch command file setup:

For put get del bput bget bdel [command] [#of items in file(if necessary)] [file containg key and value (if necessary)]

For nput ngetn (random numbers are generated for this function) [#number of records to put/get] [key size (only applicapble for byte/strng)] [value size (nput only)] [size correctance number]

For flush (only command is used to flush)

Parameters: -f (file with batch commands) -d (Type of DB to use: levelDB=1 mysql=3) -t (Type of keys: int=1, longInt=2, float=3, double=4, longDouble=5, string=6, byte=7) -p (path where DB will be created) -n (Name of DataBase file or directory) -b (MLOG_CRIT=1, MLOG_DBG=2) -a (DB store append mode. By default records with same key are overwritten. This flag turns on the option to append to existing values. -w This flag turns on the option to either allow or deny threads to do command based on if it is dividiable by the modlus of the modulus number -r ~ This flag turns on the option to either allow or deny threads to do command based on if the rank falls inclusively inbetween the rank ranges. NOTE: You must use the '' inbetween the numbers. Example: -r02 -q<0|1> (Quiet mode, default is verbose) 1=write out to log file