Proxmox Backup Server 4.0 released!

DFlorin said:
It's based on NFS on a Synology NAS.
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That's not a good choice for a local cache... i would recommended to use local fast nvme ssds, best with some redundancy for error correction.
 
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Allow me a follow up question regarding the local cache. What kind of data does the cache hold and how long does it cache these files? I see a significant amount of data still stored in that cache. Is there any documentation how the cache is used or for it is used for in detail?

Thanks again for your help.
 
DFlorin said:
Allow me a follow up question regarding the local cache. What kind of data does the cache hold and how long does it cache these files? I see a significant amount of data still stored in that cache. Is there any documentation how the cache is used or for it is used for in detail?

Thanks again for your help..
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The cache stores snapshot metadata such as index file, owner files, ecc. as well as backup data chunks. Chunks are stored in a least recently used cache, evicting older ones if no more slots are available. The cache will use as much storage space as available, therefore the recommendation to use a dedicated disk, partition or dataset with quota. Some more considerations are also to be found in the docs https://pbs.proxmox.com/docs/storage.html#datastores-with-s3-backend
 
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Chris said:
The cache stores snapshot metadata such as index file, owner files, ecc. as well as backup data chunks. Chunks are stored in a least recently used cache, evicting older ones if no more slots are available. The cache will use as much storage space as available, therefore the recommendation to use a dedicated disk, partition or dataset with quota. Some more considerations are also to be found in the docs https://pbs.proxmox.com/docs/storage.html#datastores-with-s3-backend
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Thanks again!
 
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