for the Veeam hardware requirements, please refer to this article :-http://helpcenter.veeam.com/backup/80/vsphere/system_requirements.html
Backup Repository Server
| Specification | Requirement |
| Hardware | CPU: x86 processor (x86-64 recommended).Memory: 4 GB RAM plus 2 GB RAM (32-bit OS) or 4 GB RAM (64-bit OS) for each concurrent job. Using more memory improves data processing performance for long chains of large backup files on backup repositories running 64-bit OS.Disk space: 200 MB for Veeam Backup & Replication components and sufficient disk space to store backup files and replicas (high-RPM drives and RAID10 configuration recommended).Network: 1 Gbps LAN for onsite backup and replication and 1 Mbps WAN for offsite backup and replication recommended. High latency and reasonably unstable WAN links are supported. |
Based on our experience, for Windows server with 5 or more VMs, it is better to have at least 16GB RAM for the physical server self.
Some people also ask how to calculate virtual memory needed to compact backup. “
From this perspective I think If repository has 16GB RAM, virtual memory is increased during the compact job up to 48GB. If compact job is still not finished, OS is unable to increase the virtual memory and task is failed with the error “Unable to allocate memory for storage metadata bank”.
The obvious workaround for this problem – assigning more RAM or manual configure virtual memory limits. But the question I have – how large should be virtual memory to compact 20TB of data? I wound experiment with size because such job takes days. So if someone has experience or know how I can calculate virtual memory needed for such task, would be great.”
A1: I don’t have a specific formula, but I had the same errors when doing a compact with multiple jobs with 2-3 TB files each. I went from 16 GB to 32 GB and all of those went away. Now that I’m doing Copy Jobs as well, I just increased to 48 GB and it still got into the 90% used range. More is better.
A2: Such memory consumption doesn’t look expected, indeed. The process performing compact requires ~150 bytes per block, which even with the smallest block possible (256 KB) gives 12 GB of RAM for 20 TB backup file. What block size is used for this job? I also recommend opening a case with our technical support for a closer investigation.
