About MSDP capacity support and hardware requirements
The MSDP storage contains one local LSU or multiple cloud LSUs.
NetBackup 10.2 introduced a new deduplication fingerprint lookup cache referred to as Predictive/Sampling (P/S) cache, enabling support for larger MSDP pools. The new MSDP pools that are configured with version 10.2 or later use this P/S cache by default. If you upgrade the existing MSDP pools to the version 10.2, you are on the existing MSDP cache architecture and the MSDP limit does not change.
If you upgrade to NetBackup 10.4, you have the option to convert your existing MSDP pools to the new P/S cache algorithm and increase the supported capacity of your local and cloud storage.
See About sampling and predictive cache.
See Rebuilding the sampling cache.
The following table lists the MSDP capacity for NetBackup 10.1.1 and earlier versions.
Table: MSDP capacity for NetBackup 10.1.1 and earlier versions
Platform | Local disk pool | Local and cloud disk pool |
|---|---|---|
BYO | 400 TiB | 1.2 PiB |
Cloud-Only | N/A | 1.2 PiB |
NBA | 960 TiB | 1.2 PiB |
Flex | 960 TiB | 1.2 PiB |
Flex Scale (16-node) | 1.8 PiB | 8.8 PiB |
Access | 1.2 PiB | N/A |
The following table lists the MSDP capacity for NetBackup version 10.2 and later with P/S cache MSDP pools.
Table: MSDP capacity for NetBackup 10.2 and later
Platform | Local disk pool | Local and cloud disk pool |
|---|---|---|
BYO | 400 TiB | 2.4 PiB |
Cloud-Only | N/A | 2.0 PiB |
NBA | 960 TiB | 2.4 PiB |
Flex | 1.2 PiB 2.4 PiB (5372 appliance with 20-TB drives) | 2.4 PiB |
Flex Scale (16-node) | 2.5 PiB | 8.8 PiB |
Access | 2.4 PiB | N/A |
Cloud Scale (16-node) | N/A | 4.0 PiB |
Note:
Increased pool size is supported in Access version 8.4.
Note:
Although the new P/S cache enables support of larger MSDP pools, you must ensure that you have the appropriate resources available to support the larger pools.
Note:
On a Flex 5372 appliance that is configured with 20-TB disk drives, a local Media Server Deduplication Pool is supported up to 2.4 PiB. This configuration requires Flex Appliance 7.0 or later and the storage shelf configuration that provides the required usable capacity. On all other Flex appliance models and drive capacities, the local pool limit remains 1.2 PiB. For the supported storage shelf and drive configurations, see the Cohesity 5372 Appliance Product Description Guide.
To identify the supported applications and usage information for Flex Appliance, see the following article:
https://support.cohesity.com/s/article/article-100042995
NetBackup reserves 4 percent of the storage space for the deduplication database and transaction logs. Therefore, a storage full condition is triggered at a 96-percent threshold. If you use separate storage for the deduplication database, NetBackup still uses the 96-percent threshold to protect the data storage from any possible overload.
If your storage requirements exceed the capacity of a , you can use more than one media server deduplication node.
See About MSDP deduplication nodes.
For the operating system versions that NetBackup supports for deduplication, see the NetBackup Software Compatibility List.