Changing the total number of parallels

This section provides an example of how to change the total number of parallel uploads and parallel downloads (hereafter referred to as total number of parallels) in the Cloud Storage System Environment Settings.

Note

The Cloud Storage System Environment Settings cannot be registered when HULFT is running.

If you attempt to register a value in the Cloud Storage System Environment Settings when HULFT is running, the registration fails due to the exclusive lock.

Be sure to stop HULFT before you register a value in the Cloud Storage System Environment Settings.
If you change the Total Number of Parallel Downloads to a larger value than the value of "48" that is used when the field is not specified, the load on the system may be high depending on the operating environment. Be aware of this fact when you change the Total Number of Parallel Downloads.
If you change the Total Number of Parallel Uploads to a larger value than the value of "32" that is used when the field is not specified, the load on the system may be high depending on the operating environment. Be aware of this fact when you change the Total Number of Parallel Uploads.

Amazon S3 is used as an example to explain how to change the total number of parallels in the following procedure:

Table D.9 An example of setting values before and after changes in the Cloud Storage System Environment Settings
Field Name in Cloud Storage Environment Settings	Setting Value before Change	Setting Value after Change	Register or Not
Total Number of Parallel Downloads	48	36	✓
Total Number of Parallel Uploads	32	28	✓

✓

Use the output command of the Cloud Storage System Environment Settings list shown below to check a value before changing the value in the Cloud Storage System Environment Settings.
```
utls3sysconf --show
```
For details on the output command of the Cloud Storage System Environment Settings, refer to Output command of the Cloud Storage System Environment Settings.

The following list is output:
```
# 
# Cloud Storage System Environment Settings for Amazon S3 
# 

Download Parallels: 48 
Upload Parallels:   32
```
Values are registered for both Download Parallels (Total Number of Parallel Downloads) and Upload Parallels (Total Number of Parallel Uploads).

Register the values specified for Total Number of Parallel Downloads and Total Number of Parallel Uploads using the registration command of the Cloud Storage System Environment Settings.

utls3sysconf --dl-parallels 36 --ul-parallels 28

For details on the registration command of the Cloud Storage System Environment Settings, refer to Registration command of the Cloud Storage System Environment Settings.

The following list is output:

# 
# Cloud Storage System Environment Settings for Amazon S3 
# 

Download Parallels: 36 
Upload Parallels:   28

Check whether the values in Total Number of Parallel Downloads and Total Number of Parallel Uploads are changed to the specified values.

If you do not specify "-f" or "--force" in the registration command of the Cloud Storage System Environment Settings, the following confirmation message is output:

Are you sure to register? [y/n]:

After the confirmation message is output, input "y" or "Y" to execute the registration command of the Cloud Storage System Environment Settings.

The settings for the total number of parallels are completed.

= Remarks =

When you omit registration of the total number of parallels, the setting value that is already registered is kept.

When you initialize the total number of parallels, the following values are set:

Total Number of Parallel Downloads	:	48
Total Number of Parallel Uploads	:	32

For details on the initialization command of the total number of parallels, refer to Registration command of the Cloud Storage System Environment Settings.