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What is Symas LMDB?

Symas LMDB stands out as a remarkably fast and memory-efficient database created specifically for the OpenLDAP Project. By employing memory-mapped files, it combines the rapid read capabilities typical of purely in-memory databases with the durability characteristic of traditional disk-based systems. Notably, despite its small footprint of just 32KB of object code, LMDB delivers exceptional performance; it truly exemplifies the ideal 32KB solution. The efficiency and compact design of LMDB are crucial to its outstanding functionality. For developers looking to implement LMDB in their projects, Symas offers fixed-price commercial support that enhances the integration process. Ongoing development is actively pursued in the mdb.master branch of the OpenLDAP Project’s git repository, ensuring that it remains current and effective. Furthermore, LMDB has gained recognition in a variety of notable products and scholarly articles, underscoring its adaptability and efficacy in different applications. This widespread acclaim reinforces LMDB’s reputation as an essential asset for developers in the tech community. Additionally, its unique features continue to attract interest from developers seeking robust database solutions.

What is LevelDB?

LevelDB, a high-performance key-value storage library created by Google, is engineered to maintain an ordered association between string keys and string values. It treats both keys and values as arbitrary byte arrays, with the data organized in a sorted manner according to the keys. Users can implement a custom comparison function to alter the default sorting dynamics if desired. The library supports batching of multiple changes into a single atomic operation, which helps preserve data integrity during updates. Moreover, it enables the creation of temporary snapshots, allowing users to capture a consistent view of the data at any point in time. Users can also iterate through the stored data in both forward and backward directions, which enhances the flexibility of data access. To improve storage efficiency, data is automatically compressed using the Snappy compression algorithm. Furthermore, the library interacts with the operating system through a virtual interface, giving users the option to customize interactions with external environments, including file system operations. In practical usage, for instance, a database may contain one million entries, each entry comprising a 16-byte key paired with a 100-byte value. Interestingly, during benchmarking, the values compress to about half their original size, resulting in considerable space savings. We provide thorough performance metrics for sequential reads in both directions and evaluate the effectiveness of random lookups to highlight the library's capabilities. This extensive performance evaluation assists developers in identifying ways to optimize their utilization of LevelDB in diverse applications, ensuring they can maximize the benefits offered by this powerful library. Additionally, understanding these metrics can lead to improved design choices in database implementation and usage.

Media

Media

Integrations Supported

Google Cloud Platform
LDAP
LedisDB
OrbitDB
XBTS
insight

Integrations Supported

Google Cloud Platform
LDAP
LedisDB
OrbitDB
XBTS
insight

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Symas Corporation

Date Founded

1999

Company Location

United States

Company Website

symas.com/lmdb/

Company Facts

Organization Name

Google

Date Founded

2011

Company Location

United States

Company Website

github.com/google/leveldb

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