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
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.