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Comment Re:Nitrogen (Score 1) 566

Yes- because they used CO2. CO2 forms carbonic acid in the blood stream which upsets the acid-base homeostasis. Our brains detect that imbalance which is what triggers the breathing reflex. The more CO2 you give them- the higher the level of carbonic acid- and the stronger the reaction. In other words- it's not lack of oxygen that causes us to want to breathe- it's too much CO2.

If you fill a room with only Nitrogen, or just place a non-rebreather mask on their face and connected to a Nitrogen tank- they will simply fall unconscious and die within a couple of minutes. There is no pain, and no panic.

It is, in fact, a painless and quick death.

Comment Re:ZFS (Score 1) 609

I've used FreeBSD for as long as I can remember. My desktop is _still_ FreeBSD.

Having said that- nothing performs under high load situations like Solaris. I was not happy with Solaris in the 7, 8 or 9 days (Mostly because they kept changing things- seemingly at random), but Solaris 10, and especially OpenSolaris, have been rock solid and cool as can be under high load.

My current OpenSolaris heads are running on Dell 2950's with 32 GB of RAM, Myricom Dual Port 10Gb ethernet nics, 8 lane (2 x4) 3Gb SAS controller, dual port LP10000exDC Emulex 2Gb/s Fiber Channel cards, and dual 3GHz quad core processors. They're connected to 6 Promise vTrak J610s Dual controller disk shelves. The shelves have 4 32GB write optimized SSD's in a mirrored/striped config spread across both controller channels for our ZIL. There are 80 15k SAS drives and 8 256GB Read optimized SSD's as the L2ARC.

Both heads are connected to the shelves in an active/passive configuration in which the second head can immediately pick up if the first one fails.

We use COMSTAR to export ZFS volumes via iSCSI (over 10Gb ethernet to our VMWare servers) and Fiber Channel (To our older Sun QA Farm).

Comment Re:ZFS (Score 1) 609

You can scale ZFS pretty amazingly large- you just have to architect the system.

We've got 80 15k SAS spindles spread across two 4 lane 3Gb/s (12 Gb/s x 2) controllers. We've got 4 32GB write optimized SSD's in a mirror+stripe configuration, two disks on each channel for our ZIL. We've got 32 GB of RAM for dedupe and our L1-ARC. We've got 8 read optimized 256GB SSD's as our L2-ARC read cache. There are four hot spares in our system- 2 300GB and 2 600GB to match the two sizes of disks that we have.

The system absolutely flies. We've got dual 10Gb ethernet links in each of the two server heads. The heads are active/passive and both are connected to all the disks at all times via active/active SAS switches in the disk shelves (Promise vTrak J610S Dual's)

We use COMSTAR for iSCSI and FiberChannel target capabilities. (The fiber channel is 2Gb for our old Sun QA servers.

All of this still came out to less than 1/4 of what NetApp wanted for a similar system.

Comment What on earth are you trying to actually do? (Score 4, Insightful) 268

Routing and ISP's are huge topics- what are you trying to do?

The main problem with routing isn't bandwidth- anyone can pump enough 1500 or 9000 byte frames per second to fill a gigabit pipe. The problem is when you have lots of small packets. At that point, dedicated routing hardware with a high-speed TCAM becomes really important.

What kind of line cards do you need? ADSL? Ethernet? OC12?

What kind of services do you need to run? BGP? OSPF?

What kind of bandwidth are you going to be pushing?

Comment Re:Prevent. (Score 1) 970

The basic Brother 4040CDN I just bought is a color laser with 4 individual toner cartridges, duplex, 21ppm and networking for $360- and it will last me a decade at least. It's not a photo printer, but if all you need is color it's a better choice than an overpriced inkjet.

Comment Re:Don't Use Copper - wrong (Score 1) 465

Funny- but lots of houses in Levittown had copper radiant floor systems that failed and were attributed to the copper. We also have houses in Florida and Long Island developing pinhole leaks- either due to impurities in the copper, or environmental degradation. Either way- a single, jointless run of PEX is a hell of a lot safer bet (especially considering it can flex) than a copper pipe that can corrode, has lots of joints, and can't flex.

Comment How about doing what you enjoy? (Score 5, Insightful) 372

Stop worrying about what's going to make you the most money and figure out what you enjoy. An MBA that hates his job is worthless. A computer scientist that isn't passionate about math and theory is worthless. An IT guy that isn't obsessed with all things tech will never be as good as the guy that is.

Figure out what you love doing and do that. If you really love it you'll be better at it. The best people in any field always make plenty of money.

As an aside- the last thing this world needs is more lawyers. The second to last thing this world needs is more MBA's.

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