Hi,
I would appreciate any advice ( with arguments , if possible) regarding the best design approach considering below facts
- budget is set to XX amount
- goal is to get as much performance / capacity as possible using XX
- 4 to 6 servers, DELL R620/R630 with 8 disk slots, 64 G RAM and 8 cores
- CEPH usage - mainly provide block device through SCST to VMWare
I consider the following options ( if there is one that I miss, please let me know)
1.
NVME + NLSAS, OS running on internal SD cards
8 to 1 NVME/rotational drives ratio
2.
2 x write intensive SSD RAID1 + 6 x NLSAS, OS running on a partition of the RAID1 SSD
6 to 1 SSD / rotational drive ratio
3.
2 x write intesive SSD + 6 x NLSAS, OS on SD card
3 to 1 SSD / rotationl ratio
4. "regular" SSD , OS on SD card
For the drives, I have the following
'regular" SSD
Intel DC
S4500 ( 900$) or Micron
5100 PRO ( 1100$) or SM863a (1300$)
NLSAS
Segate ST2000NX0403
Still debating the model for SSD write intensive
Models that I am considering
HGST Ultrastar SS300 HUSMM3240ASS200 ( 1200$)
SDLTMDKW- 200G-5CA1 ( 1600$)
Still debating on NVME between Intel and Samsung
Many thanks for any/all advice
Steven
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