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This article will explain in detail how to use the onspaces and onparams commands in informix-online dynamic servers. Xiaobian thinks it is quite practical, so share it with you as a reference. I hope you can gain something after reading this article.

I. The onspaces command

1.1. Create spaces with the onspaces command

Phraseology: onspaces -c [-b] [-d] [-m] [-o] [-p] [-s] [-t]

-c Create a blobspace or dbspace

-b Name of blobspace to be created

-d Name of dbspace to be created

-g Size of blobpage in disk pages

-m Mirror device pathname and offset

-o chunk device offset in kbytes

-p chunk's disk partition or device name

- Size of s chunk in kbytes

Create a temporary dbspace

Example: onspaces -c -d dbspace -o 0 -p /home/informix/chunk/chunk1 -s 3000

1.2. Delete spaces with the onspaces command

Syntax: onspaces -d space_name Delete dbspace or blobspace

1.3. Add chunk via onspaces command

Syntax: onspaces -a [-m] [-o] [-p]

-a adds chunk to the dbspace or blobspace the name refers to

-m pathname offser Pathname and offset of mirror device

-o offset offset

-p pathname Disk partition or device name

-s size chunk size

Example: onspaces -a dbspac -o 0 -p /home/informix/chunk/chunk2 -s 2000

1.4. Remove chunks with the onspaces command

Syntax: onspaces -d [-m] [-o] [-p]

II. The onparams command

2.1. Add logical logs via onparams command

Syntax: onprams -a [-d] [-s]

-a Add a logical log file

-d dbspace dbspace where the new log file is located

-s size The size of the new log file

2.2. Delete logical logs via onparams command

Syntax: onparams -d [-l]

-d Delete a logical log file

-l Number of deleted log file

2.3. Change physical logs with onparams command

Syntax: onparams -p [-d] [-s]

-p Change physical log files

-d dbspace dbspace where the physical log file is located

-s size The size of the physical log file

2.3. The onmode -l command is used to switch logical logs

The newly added logical log can only be used after making a system backup.

ontape -s

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