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dbdst_makelbfs - Create a new Loadbalancing Filesystem


dbdst_makelbfs -S ORACLE_SID -m mount_point -g dg_name
-C chnuk_size -v vol,vol,


Veritas Storage Foundation for Oracle. To determine whether this product is installed on an \1 system, enter:

lslpp -L VRTSdbed


The dbdst_makelbfs command is used to create a load balancing file system (LBFS). LBFS filesystem is a MVS filesystem residing on a volume-set. In LBFS, the file extents are distributed on every volume of the MVS. The extent size is specified as chunk_size. Every file is evenly distributed on volumes and hence will provide a good IO performance for database files. It is recommended that the volumes are mirrored either within disk array or by VxVM. There is no need to stripe individual volumes. When DBA need to add more space to LBFS, simply create more volumes and add the volumes to the LBFS using dbdst_addvol command. After adding extra volume, every file will be rebalnaced among all volumes again. This kind of rebalancing is much faster than VxVM relayout.


The following options are supported:
.\" $Id: dbdst_options.inc,v 1.1 2006/02/16 01:33:08 susanl Exp $
-S ORACLE_SID Specifies the name of the Oracle database whose information will be retrieved.
-M mount_point
Specifies the mount point where the newly created LBFS need to be mounted. This mount point should exist and be owned by the user.
-g dg_name
Specifies the diskgroup name where the volumes reside.
-C chunk_size
The size in MB of each file extent. If not specified, the default chunk size is 1MB.
-v vol,vol,...
Specifies the list of volumes which will be used to create a volume-set and LBFS filesystem. All the volumes specified in the list must be owned by the user executing the command.

Real Application Clusters (RAC) Considerations

This command is supported in a RAC environment. This command can be run on any node of the RAC.


This example shows how to create an LBFS with volumes vol1,vol2,vol3 and vol4.

$ /opt/VRTS/bin/dbdst_makelbfs -S PROD -g oradata -M  /ora_lbfs   -C 1M -v vol1,vol2,vol3,vol4

This example shows how to add two more new volumes to LBFS

$ /opt/VRTS/bin/dbdst_addvol -S PROD -M /dev/vx/dsk/oradata/vol1   -v new_vol1:BALANCE,new_vol2:BALANCE


This command must be run as Oracle DBA user. This command can be executed when the database is online.

dbed_update must be run at least once before this command to ensure an up-to-date repository.


Please set LIBPATH to include /opt/VRTSdbms3/lib32


Command executed successfully.
An Error Occured.
Licence check failed.
No license to execute this command.
Invalid Storage Class
The device or mount point is not owned by user
Could not get information from Oracle Database
Could not load program.


dbdst_classify(1M), dbdst_admin(1M), dbdst_convert(1M), dbdst_file_move(1M), dbdst_fstat(1M), dbdst_makelbfs(1M), dbdst_partition_move(1M), dbdst_preset_policy(1M), dbdst_report(1M), dbdst_rmvol(1M), dbdst_show_fs(1M), dbdst_tbs_move(1M), oracle_edition(7)

Veritas Storage Foundation for Oracle Administrator's Guide

Last updated: 15 Jan 2006
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