Si3 Deduplication Hardware Requirements

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Si3 hardware requirements

  • For the minimum Si3 hardware requirements that apply to the SEP sesam Si3 deduplication server, see Hardware requirements.
  • For details on the required Java version, see Java Compatibility Matrix. Si3 is not mandatory, therefore there is no dependency rule in the RPM/DEB packages for it.
  • When estimating the maximum size for a deduplication store, you have to ensure that there is enough space available for dedup trash or the deduplication store will run out of space. You should calculate the required disk space based on a representative sample of your full backup and add the additional storage space equal to approx. 50% of the representative full backup.

Disk attachment and protocols

Si3 supports all types of direct-attached disk storage, such as serial attached SCSI (SAS), Serial ATA (SATA), and Fibre Channel (FC)/LUN. Si3 is NOT supported for CIFS and NFS network protocols.

Performance tip

Applies to Windows only: SEP AG recommends using the High performance power plan to increase the performance of your backup. Note that Windows sets all computers to the Balanced power plan by default, and you must manually switch to the High Performance power plan. This way, your Windows computer will consume more power, but the systems with Si3 will always operate at their highest performance level.

  • From the Start menu, go to Control Panel -> System and Security -> Power Options and change the setting to High performance.

Restriction

To avoid problems resulting from the combination of excessively large Si3 deduplication stores and inefficient hardware, the maximum initial Si3 deduplication store size is limited to 40 TB.

This restriction is valid when creating a new Si3 deduplication store in GUI. Customers with specific requirements for larger Si3 deduplication store should contact SEP support to be able to increase the value to an optimal size for their specific environment.

Required additional amount of RAM and CPU cores

The following tables show the required additional amount of RAM and CPU cores for an Si3 data store. The TB value is the capacity of the Si3 data store.

Information sign.png Note
It is not recommended to run Si3 deduplication (SEP sesam Server or RDS) on a virtual machine. If this is the case, such as during an evaluation or test, you should limit the capacity of Si3 data store to 100 GB to ensure normal VM operation. Have in mind that deduplication consumes a lot of server resources for reading, processing, and writing the deduplicated data, so you should be aware of the limitation of running Si3 on a VM.
Si3 data store capacity (check initial size restriction) RAM
<20 TB 16 GiB
20-40 TB 32 GiB

To find out how much RAM is is needed at what capacity of Si3, enter the command sm_dedup_interface propose jvmconfig <Si3-CAPACITY> at an admin command line (you must set the sesam profile to run the command). The output of MaxDirectMemorySize is the required RAM value.

The following table shows the number of CPU cores required for one Si3 data store. The TB value is the amount of data backed up (before deduplication)!

Backed up data (before dedup) CPU cores
10 TB 4
20 TB 4
40 TB 8
Information sign.png Note
Keep in mind that the stated requirements represent the demand for deduplication only. In addition to these requirements, the amount of memory for the operating system and other services should be taken into account.