Commands put and batchput

Prerequisites

Before running following commands, create a target database or ensure that a database has been created. For details about how to create a database, see 2.

Procedure

1. Go to the /home directory.

   cd /home

2. Create a database directory.

   mkdir –p /home/rocksdb/rkdb

3. Use ldb to create a database and run the put command to write the first piece of data.

   ldb  --db=/home/rocksdb/rkdb --create_if_missing put k1 v1

   

   

   If the target database to be operated by ldb does not exist and the error message "does not exist" is displayed, add the --create_if_missing parameter to create one.

4. Use ldb to run the put command to add data.

   ldb  --db=/home/rocksdb/rkdb put k2 v2

   

5. Use ldb to run the batchput command to write data in a batch.

   ldb  --db=/home/rocksdb/rkdb batchput k3 v3 k4 v4 k5 555 kstring abcd

   

6. Run the scan command to view the data written to the database.

   ldb  --db=/home/rocksdb/rkdb scan