ber_init2 - Linux

Overview

ber_init2 is a command used for initializing and manipulating BerkeleyDB environments and databases. It provides a low-level interface for accessing the BerkeleyDB storage engine.

Syntax

ber_init2 [-E] [-f] [-fpp] [-h] [-J] [-L] [-n] [-s] [-v] [-Y] [-a <file>] [-c <cachesize>] [-d <dbname>[,dbname]...] [-e <environ>] [-g <group>] [-j <journal_size>] [-l <log_size>] [-o <option>] [-p <mode>] [-t <transaction_size>] [-u <owner>]

Options/Flags

-E
Use an in-memory environment, not a file-based one.

-f
Create the specified BerkeleyDB environment if it doesn’t already exist.

-fpp
Force a file-based environment to be created even if the process doesn’t have file permissions to do so.

-h
Print usage information and exit.

-J
Use an external journal.

-L
Lock the environment.

-n
Do not run recovery.

-s
Create a shared environment.

-v
Enable verbose output.

-Y
Use a window for the cache, instead of a queue.

-a
Specify the cache size in bytes.

-c
Specify the cache size in bytes.

-d [,dbname]…
Specify the database names to initialize.

-e
Specify the environment name to initialize.

-g
Specify the group ownership of the environment.

-j <journal_size>
Specify the journal size in bytes.

-l <log_size>
Specify the log size in bytes.

-o
Specify a BerkeleyDB option. Use the -o flag multiple times to specify multiple options.

-p
Specify the file mode of the environment.

-t <transaction_size>
Specify the transaction size in bytes.

-u
Specify the user ownership of the environment.

Examples

To create a new environment named "mydb" with a cache size of 10 MB:

ber_init2 -c 10000000 -e mydb

To open an existing environment named "mydb":

ber_init2 -e mydb

To create a new database named "users" in the "mydb" environment:

ber_init2 -d users -e mydb

Common Issues

Error: Environment not found

This error occurs when you try to open an environment that doesn’t exist. To fix this, create the environment using the -f flag.

Error: Database not found

This error occurs when you try to open a database that doesn’t exist. To fix this, create the database using the -d flag.

Integration

ber_init2 can be used with other BerkeleyDB commands, such as ber_put and ber_get, to create, modify, and retrieve data from BerkeleyDB databases.

Related Commands

• db_dump: Dump the contents of a BerkeleyDB database to a file.
• db_load: Load the contents of a file into a BerkeleyDB database.
• db_stat: Get statistics about a BerkeleyDB database.