IamSpartacus
Dabbler
- Joined
- Feb 23, 2017
- Messages
- 38
I've got two identical UnRAID servers at home full of 8 x 8TB Seagate SMR drives and 2 x 480GB SSDs for cache. While I had originally assumed FreeNAS would not be a good application for SMRs, I've been hearing of some users who've used them in RAIDz2 vdevs with pretty solid performance. So my plan is to take my backup UnRAID server (VM) and convert it into a FreeNAS server (VM) for testing to see how the performance compares over the next few weeks. If the performance turns out to be poor I'll probably start looking towards saving for some PMR drives.
My question is, one major difference between UnRAID and ZFS is the RAM requirements to attain good performance. My UnRAID server has 32GB of RAM which is probably 4 times as much as I need for UnRAID. On the other hand, for a 64TB (48TB usable) ZFS array it may not suffice. For those who have worked with very large arrays, how much of an impact will RAM have and will 32GB even suffice.
Server specs:
SuperMicro X10SDV-7TP4F (Xeon D-1537)
32GB DDR4-2133 Registered ECC RAM
Dual 10Gb SFP+ ports
LSI2116 HBA
8 x 8TB Seagate SMR drives
2 x 480GB Intel 730 SSDs
Type of data being stored:
70% Media
10% Backups
10% Surveillance (thinking of putting two WD Purples in a ZFS mirror for this)
10% Personal Data (Documents, Pictures, Software, etc.).
My question is, one major difference between UnRAID and ZFS is the RAM requirements to attain good performance. My UnRAID server has 32GB of RAM which is probably 4 times as much as I need for UnRAID. On the other hand, for a 64TB (48TB usable) ZFS array it may not suffice. For those who have worked with very large arrays, how much of an impact will RAM have and will 32GB even suffice.
Server specs:
SuperMicro X10SDV-7TP4F (Xeon D-1537)
32GB DDR4-2133 Registered ECC RAM
Dual 10Gb SFP+ ports
LSI2116 HBA
8 x 8TB Seagate SMR drives
2 x 480GB Intel 730 SSDs
Type of data being stored:
70% Media
10% Backups
10% Surveillance (thinking of putting two WD Purples in a ZFS mirror for this)
10% Personal Data (Documents, Pictures, Software, etc.).
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