| Excerpt |
|---|
Specifications, costs, and trade-offs for upgrading and expanding the Matrix cluster. |
From Scheraga, with Czarek, from 5/27/2014.
The bottom line IN THE FOLOWING FOLLOWING BRIEF FORM is
A. Buy new head node
B. Buy new storage machine
C. Buy new computational nodes
D. Arrange an efficient back-up plan
...
E. Buy components for networking, power. And new rack.
STATUS, TOTAL for Option 1 column: Cost for A, C, and E: $46,500. Still need Storage and Backup costs.<$50,750 + $1,000/yr for backups.
Component | Option 1 (most likely)
| Option 2
Comments | To consider, to do's, questions, notes and comments.
|
|---|
A. New head node | Dedicated chassis.
(1 U)
$3,000
| None.
| We considered using one One of four computers (within a Quad), in one chassis .
(2U)
Consider Option 2 for cost savings (if any).
To do: Calculate cost savings (if any, considering ).
Any other considerations, such as risk or recovery challenges?
, for the head node. This is only worth considering if needing to save $5,000 by giving up one (of 8) compute node.
Note 1: Head node has lower proc, lower memory, and 256 GB SSD drive (for ( OS and applications).
Note 2: Price for Option 1 Head node price includes a large drive 4T 4TB "WD black" for temp. user data (~$2,700+$250). |
B. New storage machine | Synology-branded dedicated storage array .
To do: Get price of appropriate device. (RS 3412XS)
$3,000, plus five 4TB hard drives ($250ea). Total price is for 12-16TB initial storage, depending on risk choices (see Notes, at left).
$4,250
| Home-brewed dedicated storage array, perhaps running OpenNAS software.
To do: Get price of appropriate hardware.
| Consider Option 2 for cost savings (if any).
BUT, must also consider risk, support, and staffing effort.
To do: What connector? If ethernet: iSCSI (all compute node writes through head node) or NFS (theoretically could be accessible by compute nodes)? If not ethernet, what connector technology, at what price and complexity?
Note 1: Five 4TB HD's can allow for 1 drive to fail (16TB) or 2 drives to fail (12TB).
Note 2: Price for Option 1 includes five large 4TB "WD red?" for temp. user data (~$2,700+$250).
Note 3: $1,000 get you a redundant power supply.
|
C. New computational node
| 8 nodes (in 2 Quads), with higher computational processors.
Each node: 2 * E5-26700v2; 2.5GHz, 10 cores/ proc (thus, 20 cores/ node). Add $2,500 per node compared to Option 2. Thus, $5,100 each node.
$40,800
| 16 nodes (in 4 Quads), with standard computational processors.
Each node: 2 * E5-26200v2; 2.1GHz, 6 cores/ proc (thus, 12 cores/ node). $2,600 per node.
$41,600
| Consider Option 2 for increasing number of cores from 160 to 192, but with slower set of processors. See Czarek's note, from 4/14, below.
For either choice, to do: Storage: Fast or large? Or both?
Note: Buying in multiples of 4 (Quads) is most cost-effective.
|
D. Arrange an efficient back-up plan | EZ-Backup
To do: Get actual annual cost $1,000 per year, at current amounts and compression(2.7TB) and current rates (see Notes, at left).
| N/A.
( At current quantities of backed-up data, ChemIT cannot recommend an alternative. )
| On-going to do: Evaluate cost-effectiveness as volume grows.
Note 1: At current 2.7 TB's of backup (including compression and versioning), costs are as were predicted (no surprises). That is to say, and thus were at the time considered to be affordable and cost-effective compared to investing in own hardware and staffing.
Note 2: Costs are ~$80/ month currently for 2.7TB. Future amounts expected to be more.
Note 3: Rates likely >10% drop July 1, 2014, as in past years. |
E. Components for networking, power. And new rack.
| Under $2,700.
| N/A.
Not much discretionary elements in this category.
| Specifics:
Networking (~$1,500)
1 switch (Cisco SG300-52; ~$750)
Network cabling (price dependent on above decisions. Expect well under $1K)
Power (~$700)
UPS (APC SMC1500-2U; $500; for head node only, storage node, and switch; Use current (cheaper) UPS, when again available from current head node, if necessary to spread load or for manageability.)
2-3 PDUs (power distribution units; a.k.a. power strips; $100 each)
Qty Exact qty depends on above processor decisions (amperage calculations)
Rack (~$500) |
...
