CookiesLikeWhoa
Patron
- Joined
- Mar 22, 2016
- Messages
- 217
Hey all! Let me just say thank you in advance for any and all help received!
I'm contemplating building an all flash Freenas. I have read the threads about SSD based NAS' and saw the recommendations to go with an iXsystem, but this is not something mission critical, more experimental than anything. It will host 6 iSCSI targets, and a current movie projects (which are will be replicated on another Freenas system) With that said...
Motherboard: X10SRH-CNL4F
CPU: Xeon E5-1630V4
Case: SUPERMICRO 846E16-R1200B
Case: SuperChassis 216BE1C-R741JBOD (external shelf)
HBA: LSI-9207-8e
SSD: Samsung 850 EVO 500GB
RAM: 64GB Hynix HMA84GR7MFR4N-TF ECC RDIMM
SLOG: Intel 750 SSD (Looks like it is still needed)
BOOT: Mirrored San Disk Cruzer
NIC: Chelsio T580
So here are the questions:
I'm contemplating building an all flash Freenas. I have read the threads about SSD based NAS' and saw the recommendations to go with an iXsystem, but this is not something mission critical, more experimental than anything. It will host 6 iSCSI targets, and a current movie projects (which are will be replicated on another Freenas system) With that said...
Motherboard: X10SRH-CNL4F
CPU: Xeon E5-1630V4
Case: SUPERMICRO 846E16-R1200B
Case: SuperChassis 216BE1C-R741JBOD (external shelf)
HBA: LSI-9207-8e
SSD: Samsung 850 EVO 500GB
RAM: 64GB Hynix HMA84GR7MFR4N-TF ECC RDIMM
SLOG: Intel 750 SSD (Looks like it is still needed)
BOOT: Mirrored San Disk Cruzer
NIC: Chelsio T580
So here are the questions:
- RAM, how much do I really needed? There will be at most 24 SSD's in this build with at most 12TB's in storage space, but that won't happen for a while.
- Pool configuration. I was initially going to go with a mirrored Vdev config, but since that would really kill space I was thinking about a RaidZ1 config. Either 4 Vdevs with 6 drives each, or 6 Vdevs with 4 Drives each. Throughput is king here. We work with large video files (sometimes in the TB range) and being able to move them quickly is key. IOPS are still a consideration since there will be some iSCSI targets hence the multi-Vdev configs.
- HBA: I currently use a couple of LSI-9207, which has served me well in 3 Freenas builds. It has the bandwidth of 4x6Gb/s per connection. In an effort to maximize throughput would it be possible to use something like an LSI 9300-8e? I understand that my backplane is a single SAS2 connection and all my of SSD's are SATA3 which all have caps of 6Gb/s, but using a SAS3 HBA allow more aggregate bandwidth since the it has 4x12Gb/s connections? Or will this not all matter due to either the backplane, SSD's, cable or just because it doesn't work that way?