Difference between revisions of "Talk:Vote to buy a new UPS"

Latest revision as of 02:20, 12 October 2014

replacement hardware

Currently, we can only pwer to of the hypervisors, the 3rd one takes out the ups. --Hef (talk) 18:59, 7 September 2014 (CDT)

Low amount of feedback

The Cyberpower unit has very few reviews on amazon, and I am unfamiliar with the brand. --Hef (talk) 19:23, 7 September 2014 (CDT)
- tom says the brand in unreliable, I removed it --Hef (talk) 09:36, 17 September 2014 (CDT)

Under Load

We should test the dell power edges under load --Hef (talk) 19:32, 7 September 2014 (CDT)
- Anthony did, and updated the numbers. it requires a re-evaluation of hardware. --Hef (talk) 09:37, 17 September 2014 (CDT)

208v power

Where do we pull 208v power from? --Hef (talk) 09:37, 17 September 2014 (CDT)
How much is that going to cost? --Hef (talk) 09:37, 17 September 2014 (CDT)
There are plenty of units in the 4000-5000VA range not requiring 208v nominal input voltage. see http://www.apc.com/products/family/index.cfm?id=165 for a good breakdown of APC units by input/output voltage. Kuroishi (talk) 13:50, 8 October 2014 (CDT)
- Disregard previous note, the 120v models top out about 3000VA, but it's still a good overview of APC's options, also, according to the APC calculator, nothing is going to give us more than ~1minute runtime at 2000W draw. Kuroishi (talk) 14:10, 8 October 2014 (CDT)

Next Steps

We need to decide how feasible it is to run 208v/240v circuits up to the catwalk, if this is required.

Some other things I'm considering:

Can all of the devices that need UPS power receive 208v power (or easily be adapted to)? Some, but not all 208v Input UPS's output 120v, and are probably more expensive.
Do we need UPS protection for everything in the rack? It might be more effective to protect critical services with a cheaper 120v Input UPS and obtain cheaper (non-battery-backed-up) power conditioning unit(s) to protect the non-uptime-critical hardware in the rack, without offering UPS protection. (this might be a viable fallback option if members decide that the "perfect world" scenario described on the vote page is overkill.) (brownouts are also a thing that happens, notes hef on IRC, making this a much less than ideal solution.)

Once we determine the necessity of 208 or 240v circuits, and what sort of additional cost that might entail, we should be looking good to recalculate our budget for this vote and get it on the table. Kuroishi (talk) 16:51, 8 October 2014 (CDT)

@@ Line 17: / Line 17: @@
 * Where do we pull 208v power from? --[[User:Hef|Hef]] ([[User talk:Hef|talk]]) 09:37, 17 September 2014 (CDT)
 * How much is that going to cost? --[[User:Hef|Hef]] ([[User talk:Hef|talk]]) 09:37, 17 September 2014 (CDT)
-* There are plenty of units in the 4000-5000VA range not requiring 208v nominal input voltage.  see http://www.apc.com/products/family/index.cfm?id=165 for a good breakdown of APC units by input/output voltage. [[User:Kuroishi|Kuroishi]] ([[User talk:Kuroishi|talk]]) 13:50, 8 October 2014 (CDT)
+* There are plenty of units in the 4000-5000VA range not requiring 208v nominal input voltage. see http://www.apc.com/products/family/index.cfm?id=165 for a good breakdown of APC units by input/output voltage. [[User:Kuroishi|Kuroishi]] ([[User talk:Kuroishi|talk]]) 13:50, 8 October 2014 (CDT)
 ** Disregard previous note, the 120v models top out about 3000VA, but it's still a good overview of APC's options, also, according to the APC calculator, nothing is going to give us more than ~1minute runtime at 2000W draw. [[User:Kuroishi|Kuroishi]] ([[User talk:Kuroishi|talk]]) 14:10, 8 October 2014 (CDT)
 == Next Steps ==
 We need to decide how feasible it is to run 208v/240v circuits up to the catwalk, if this is required.
 Some other things I'm considering:
-* Can all of the devices that need UPS power receive 208v power (or easily be adapted to)?  Some, but not all 208v Input UPS's output 120v, and are probably more expensive.
+* Can all of the devices that need UPS power receive 208v power (or easily be adapted to)? Some, but not all 208v Input UPS's output 120v, and are probably more expensive.
-* Do we need UPS protection for everything in the rack?  It might be more effective to protect critical services with a cheaper 120v Input UPS and obtain cheaper (non-battery-backed-up) power conditioning unit(s) to protect the non-uptime-critical hardware in the rack, without offering UPS protection.  (this might be a viable fallback option if members decide that the "perfect world" scenario described on the vote page is overkill.) (brownouts are also a thing that happens, notes hef on IRC, making this a much less than ideal solution.)
+* Do we need UPS protection for everything in the rack? It might be more effective to protect critical services with a cheaper 120v Input UPS and obtain cheaper (non-battery-backed-up) power conditioning unit(s) to protect the non-uptime-critical hardware in the rack, without offering UPS protection. (this might be a viable fallback option if members decide that the "perfect world" scenario described on the vote page is overkill.) (brownouts are also a thing that happens, notes hef on IRC, making this a much less than ideal solution.)
 Once we determine the necessity of 208 or 240v circuits, and what sort of additional cost that might entail, we should be looking good to recalculate our budget for this vote and get it on the table. [[User:Kuroishi|Kuroishi]] ([[User talk:Kuroishi|talk]]) 16:51, 8 October 2014 (CDT)