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Configuring and Clearing Disk-Based Cache for Cloud deduplication storage device.

Article: 100050614
Last Published: 2023-08-02
Ratings: 1 1
Product(s): Backup Exec

Problem
 

Disk cache size requirements when configuring Cloud deduplication storage device.
 

Error Message
 

Unable to configure Cloud deduplication storage device.
 

Cause
 

Default disk cache size requirements when configuring Cloud deduplication storage device
 

Solution

 

To create the Cloud Deduplication Storage, a minimum free space that is equal to or greater than the total of  (CloudDataCacheSize + CloudMapCacheSize + CloudMetaCacheSize + CloudUploadCacheSize) must be available in the local dedupe storage’s volume.
 

To change the default disk cache size, edit contentrouter.cfg in <Deduplication folder>\etc\Puredisk with the following parameters:
 

Parameter

Details

Default value

CloudDataCacheSize

Default data cache size when adding Cloud LSU. Decrease this value if enough free space is not available.

100 GiB

CloudMapCacheSize

Default map cache size when adding Cloud LSU. Decrease this value if enough free space is not available.

5 GiB

CloudMetaCacheSize

Default meta cache size when adding Cloud LSU. Decrease this value if enough free space is not available.

100 GiB

CloudUploadCacheSize

Default upload cache size when adding Cloud LSU. The default value is 12 GiB.

12 GiB

MaxCloudCacheSize

Specify the maximum cloud cache size in percentage. It is based on total system memory, swap space excluded.

20%

MaxCacheSize

The percentage of RAM to use for the fingerprint cache of local LSU.

50%

UsableMemoryLimit

Specify maximum usable memory size in percentage. 
(MaxCacheSize + MaxCloudCacheSize + Cloud in-memory upload cache size) <= UsableMemoryLimit

80%

 

Clearing Cache
 

  1. At the command prompt, enter the command: 

<Backup Exec install path>pddecfg -a listcloudlsu 

  A list of cloud deduplication storage devices is displayed, note the CachePath 

  1. Stop Deduplication Services from Service Manager and restart BE services
     
  2. Disable the Disk storage lockdown setting:

Configuration and Settings > Backup Exec setting > Network and Security > Disk storage lockdown

  1. Delete cache folder using Windows Explorer or by using the command:

rmdir /S <CachePath>  

  1. Start Duplication services and Restart Backup Exec Services
     
  2. Enable the Disk storage lockdown setting:

Configuration and Settings > Backup Exec setting > Network and Security > Disk storage lockdown

 

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