PHP-mdbm

PHP-mdbm is a PHP binds to Yahoo! MDBM C API.
MDBM is a super-fast memory-mapped key/value store.
MDBM is an ndbm work-alike hashed database library based on sdbm which is based on Per-Aake Larson’s Dynamic Hashing algorithms.
MDBM is a high-performance, memory-mapped hash database similar to the homegrown libhash.
The records stored in a mdbm database may have keys and values of arbitrary and variable lengths.

Build Stats	PHP-mdbm ver.	License	Y! mdbm ver.

API

Almost Useful APIs Support.

Not Supported APIs

Unfortunately, the following list are not supported on now.

Group	API
Record Iteration	mdbm_iterate
Data Management	mdbm_clean, mdbm_prune, mdbm_set_cleanfunc
Statistics	mdbm_chunk_iterate
Cache and Backing Store	mdbm_set_backingstore
Import and Export	mdbm_cdbdump_to_file, mdbm_cdbdump_trailer_and_close, mdbm_cdbdump_add_record, mdbm_dbdump_to_file, mdbm_dbdump_trailer_and_close, mdbm_dbdump_add_record, mdbm_dbdump_export_header, mdbm_dbdump_import_header, mdbm_dbdump_import, mdbm_cdbdump_import

If you want them, please feel free to raise an issue

Deprecated APIs

API	STATUS	COMMENT
mdbm_save	DEPRECATED	mdbm_save is only supported for V2 MDBMs.
mdbm_restore	DEPRECATED	mdbm_restore is only supported for V2 MDBMs.
mdbm_sethash	DEPRECATED	Legacy version of mdbm_set_hash() This function has inconsistent naming, an error return value. It will be removed in a future version.

Only a V2 implementation

API	STATUS	COMMENT
mdbm_stat_all_page	V3 not supported	There is only a V2 implementation. V3 not currently supported.
mdbm_stat_header	V3 not supported	There is only a V2 implementation. V3 not currently supported.

Support Two Versions Compatibility

PHP

Version	Support	Test
5.2.x ~ 5.6.x	yes	always
7.x	yes	always
8.x	yes	always

MDBM

branch or release ver.	Support	Test	Comment
master	yes	always
4.x	yes	always

Install

MDBM

MDBM Packages

php-mdbm

Use the composer (packagist)

See the composer documentation for use composer

composer require torden/php-mdbm

Use the source code

git clone https://github.com/torden/php-mdbm

Or Download the tarball (tag or release)

wget https://github.com/torden/php-mdbm/archive/vX.X.X.tar.gz
tar xvzf vX.X.X.tar.gz

Compile

cd php-mdbm/src/
$PHP_INSTALLED_PATH/bin/phpize
./configure --with-php-config=$PHP_INSTALLED_PATH/bin/php-config --with-mdbm=/usr/local/mdbm/
make
#make test TESTS='-q -m'
#make test TESTS='-q'
make install

Configuration

echo "extension=mdbm.so" >> php.ini

Check

$PHP_INSTALLED_PATH/bin/php -i | fgrep -i mdbm
...
mdbm
MDBM Support => enable
MDBM API Version => 4
PHP MDBM Version => 0.1.0
...

Example

See the documentation for more details.

Benchmark

The following is results of PHP-mdbm vs PHP SQlite3 benchmarks for simple data storing and random fetching.

See the Source Code.

Prepare for a Benchmark

cd php-mdbm/src/benchmark/
composer install

Spec

Host

Type	Spec
CPU	Inte i-7
RAM	DDR4 32G
HDD	Nvme M.2 SSD

VM

Type	Spec
Machine	VM(VirtualBox)
OS	Ubuntu 17.10.1 (Artful Aardvark)
CPU	2 vCore
RAM	8G

Software

Type	Version	Comment
PHP	7.0.26	---
php-mdbm	v0.1.0	---
mdbm	master branch	---
SQLite3	3.19.3	Async, Transaction, journal_mode = wal

Simple INSERTs

php src/mdbm_simple_store.php -live

 Created by B. van Hoekelen version 2.3.2 PHP v7.0.26
 Max memory 128M, max execution time unlimited on 2018-01-21 01:33:02

   Label                                                         Time        Memory        Peak
---------------------------------------------------------------------------------------------------
 > Calibrate point                                               2.86 μs |    0.00 KB |    2.00 MB
 > mdbm store(number, number) :: 100,000                       297.88 ms |    0.00 KB |    2.00 MB
 > mdbm store(string, string) :: 100,000                       329.36 ms |    0.00 KB |    2.00 MB
 > mdbm store(number, number) :: 1,000,000                       2.94  s |    0.00 KB |    2.00 MB
 > mdbm store(string, string) :: 1,000,000                       3.36  s |    0.00 KB |    2.00 MB
 > mdbm store(number, number):: 10,000,000                       70.4  s |    0.00 KB |    2.00 MB
 > mdbm store(string, string) :: 10,000,000                    125.46  s |    0.00 KB |    2.00 MB
---------------------------------------------------------------------------------------------------
   Total 7 taken                             01-21 01:36:25    202.78  s      0.00 KB      2.00 MB

Simple Random FETCHs

php src/mdbm_simple_fetch.php -live

 Created by B. van Hoekelen version 2.3.2 PHP v7.0.26
 Max memory 128M, max execution time unlimited on 2018-01-21 01:37:49

   Label                                                         Time        Memory        Peak
---------------------------------------------------------------------------------------------------
 > Calibrate point                                               4.05 μs |    0.00 KB |    2.00 MB
 > mdbm random fetch(number) :: 100,000                        140.18 ms |    0.00 KB |    2.00 MB
 > mdbm random fetch(string) :: 100,000                        161.95 ms |    0.00 KB |    2.00 MB
 > mdbm random fetch(number) :: 1,000,000                        1.44  s |    0.00 KB |    2.00 MB
 > mdbm random fetch(string) :: 1,000,000                        1.63  s |    0.00 KB |    2.00 MB
 > mdbm random fetch(number):: 10,000,000                       15.07  s |    0.00 KB |    2.00 MB
 > mdbm random fetch(number) :: 10,000,000                      16.97  s |    0.00 KB |    2.00 MB
---------------------------------------------------------------------------------------------------
   Total 7 taken                             01-21 01:38:24     35.42  s      0.00 KB      2.00 MB

Simple Random FETCHs with Use the Preload API

php src/mdbm_simple_preload_fetch.php -live

 Created by B. van Hoekelen version 2.3.2 PHP v7.0.26
 Max memory 128M, max execution time unlimited on 2018-01-21 01:39:36

   Label                                                         Time        Memory        Peak
---------------------------------------------------------------------------------------------------
 > Calibrate point                                               4.05 μs |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(number) :: 100,000               138.52 ms |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(string) :: 100,000               154.26 ms |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(number) :: 1,000,000                1.4  s |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(string) :: 1,000,000               1.58  s |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(number):: 10,000,000              14.83  s |    0.00 KB |    2.00 MB
 > mdbm::preload random fetch(number) :: 10,000,000             16.73  s |    0.00 KB |    2.00 MB
---------------------------------------------------------------------------------------------------
   Total 7 taken                             01-21 01:40:11     34.83  s      0.00 KB      2.00 MB

SQLite3

Simple INSERTs

php src/sqlite3_simple_store.php -live

PRAGMA synchronous=OFF;
pragma journal_mode = wal;
Transaction(BEGIN,COMMIT)

 Created by B. van Hoekelen version 2.3.2 PHP v7.0.26
 Max memory 128M, max execution time unlimited on 2018-01-22 00:44:56

   Label                                                         Time        Memory        Peak
---------------------------------------------------------------------------------------------------
 > Calibrate point                                               4.05 μs |    0.00 KB |    2.00 MB
 > sqlite3 insert(number, number) :: 100,000                    761.78 ms |    0.00 KB |    2.00 MB
 > sqlite3 insert(string, string) :: 100,000                      1.17  s |    0.00 KB |    2.00 MB
 > sqlite3 insert(number, number) :: 1,000,000                    7.93  s |    0.00 KB |    2.00 MB
 > sqlite3 insert(string, string) :: 1,000,000                   12.29  s |    0.00 KB |    2.00 MB
 > sqlite3 insert(number, number):: 10,000,000                   80.24  s |    0.00 KB |    2.00 MB
 > sqlite3 insert(string, string) :: 10,000,000                 127.54  s |    0.00 KB |    2.00 MB
---------------------------------------------------------------------------------------------------
   Total 7 taken                             01-22 01:00:25    229.93  s      0.00 KB      2.00 MB

Simple Random FETCHs

php src/sqlite3_simple_fetch.php -live

PRAGMA synchronous=OFF;
pragma journal_mode = wal;

 Created by B. van Hoekelen version 2.3.2 PHP v7.0.26
 Max memory 128M, max execution time unlimited on 2018-01-22 01:23:53

   Label                                                         Time        Memory        Peak
---------------------------------------------------------------------------------------------------
 > Calibrate point                                               4.05 μs |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(number) :: 100,000                       2.16  s |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(string) :: 100,000                       3.16  s |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(number) :: 1,000,000                    25.94  s |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(string) :: 1,000,000                    34.84  s |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(number):: 10,000,000                   275.47  s |    0.00 KB |    2.00 MB
 > sqlite3 random fetch(string) :: 10,000,000                  397.42  s |    0.00 KB |    2.00 MB
---------------------------------------------------------------------------------------------------
   Total 7 taken                             01-22 01:36:12    738.99  s      0.00 KB      2.00 MB

Link

Please feel free. I hope it is helpful for you.

Name		Name	Last commit message	Last commit date
Latest commit History 52 Commits
.github/workflows		.github/workflows
benchmark		benchmark
src		src
.gitignore		.gitignore
.travis.yml		.travis.yml
README.api.md		README.api.md
README.md		README.md
_config.yml		_config.yml
composer.json		composer.json

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PHP-mdbm

Table of Contents

API

Not Supported APIs

Deprecated APIs

Only a V2 implementation

Support Two Versions Compatibility

PHP

MDBM

Install

MDBM

php-mdbm

Use the composer (packagist)

Use the source code

Or Download the tarball (tag or release)

Compile

Configuration

Check

Example

Benchmark

Prepare for a Benchmark

Spec

Host

VM

Software

Simple INSERTs

Simple Random FETCHs

Simple Random FETCHs with Use the Preload API

SQLite3

Simple INSERTs

Simple Random FETCHs

Link

About

Releases 3

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torden/php-mdbm

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Repository files navigation

PHP-mdbm

Table of Contents

API

Not Supported APIs

Deprecated APIs

Only a V2 implementation

Support Two Versions Compatibility

PHP

MDBM

Install

MDBM

php-mdbm

Use the composer (packagist)

Use the source code

Or Download the tarball (tag or release)

Compile

Configuration

Check

Example

Benchmark

Prepare for a Benchmark

Spec

Host

VM

Software

Simple INSERTs

Simple Random FETCHs

Simple Random FETCHs with Use the Preload API

SQLite3

Simple INSERTs

Simple Random FETCHs

Link

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