mdbm_config

This utility is part of the mdbm_tools package.

SYNOPSIS

mdbm_config [-cDhlv] [-a analysislevel] [-d dbsize] [-f coefficientvalue] [-i infile] [-L lockmode] [-n objcount:objcount] [-o opcount] [-p pagesize] [-r value] [-s hash-function] [-t targetcapacity] [-w percentwrites] outfile.mdbm

DESCRIPTION

mdbm_config analyzes and benchmarks the data, then sets up an MDBM using data files in db_dump or cdb_dump format. This tool must be used with MDBM V3 or later.

OPTIONS

-a analysislevel
	Level Description 1 Quick 2 Medium 3 Complete [Default level]
-c	Import using cdb_dump format (default is db_dump format or MDBM format for files with the .mdbm extension).
-d dbsize	Create DB with initial MDBM size dbsize.
-D	Delete keys with zero-length values retrieved from import files.
-f coefficientvalue
	Set the spill-page coefficient value to coefficientvalue.
-h	Show help message.
-i infile	Read from infile instead of stdin. Files with a .mdbm extension are assumed to be MDBMs.
-l	Assume large object support is required for this MDBM setup.
-L lockmode	Set locking mode to be one of exclusive, partition, or shared.
-n objcount	(or -n objcount:objcount). If only 1 object count is provided, set the upper target for the number of objects per page (default is 100). If 2 colon-separated object counts are provided, set the upper and lower target to the number of objects per page. The lower target’s default is 75% of the upper target of objects per page.
-o opcount	The total number of read and write operations to perform when benchmarking.
-p pagesize	Create DB with pagesize pagesize. Page size will be rounded to system page size. Suffix k/m/g may be used to override the default of bytes.
-r coefficientvalue
	Set the ratio of object over-the-bound (-n option) penalty to capacity utilization penalty.
-s hash-function
	Create DB using hash function hash-function. hash-function Description 0 CRC-32 1 EJB 2 PHONG 3 OZ 4 TOREK 5 FNV32 6 STL 7 MD5 8 SHA-1 9 Jenkins 10 Hsieh SuperFast
-t targetcapacity
	Set the target MDBM capacity utilization rate (1-75%). Default capacity utilization rate is 50%.
-v	Generate verbose output.
-w percentwrites
	When performing benchmarks, specify what floating point percentage of accesses are writes. The default if zero.

RETURN VALUE

Returns 0 upon success, non-zero upon failure.

EXAMPLES

mdbm_config -c -i /tmp/foo.data /tmp/newdb.mdbm

SEE ALSO

mdbm_check(1), mdbm_compare(1), mdbm_copy(1), mdbm_create(1), mdbm_digest(1), mdbm_dump(1), mdbm_export(1), mdbm_fetch(1), mdbm_import(1), mdbm_purge(1), mdbm_replace(1), mdbm_restore(1), mdbm_save(1), mdbm_stat(1), mdbm_sync(1), mdbm_trunc(1)

CONTACT

mdbm-users <mdbm-users@yahoo-inc.com>