Messages in this thread | | | Date | Thu, 13 Mar 2008 15:12:30 -0400 | From | Ric Wheeler <> | Subject | Re: [ANNOUNCE] Ramback: faster than a speeding bullet |
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Daniel Phillips wrote: > On Thursday 13 March 2008 06:27, Ric Wheeler wrote: >>>>> So "perfectly reliable if UPS power does not fail" seems a bit over the >>>>> top. >>>> It works for EMC :-) >>> Where they control the hardware and run a rather specialized OS as well, >>> not a general purpose system like Linux on "commodity" hardware ;-) >> Actually, in Centera we use generic hardware with a fairly normal kernel >> which has strategic backports from upstream (libata, nic drivers, etc). >> >> No UPS in the picture. Data integrity is protected by working with the >> application team to insure they understand when data is safely on the >> disk platter and working with IO & FS people to try and make sure we >> don't lie to them (too much ) about that promise. >> >> The centera boxes are tested with power failure & error injection and by >> all of our customers in all those ways customers do ;-) > > Hi Ric, > > Right, so Linux has gotten to the point where it competes with purpose- > built embedded software in reliability. Not quite there, but close > enough for mission-critical.
This is our case, but we have been working for quite a while to enhance the reliability of the io stack & file systems. It also helps to be very careful to select hardware components with mature, open source & natively integrated drivers ;-)
> > I was not thinking of Centera when I mentioned the UPS though... > > Daniel
No problem, we certainly have many boxes with built in ups hardware ;-)
ric
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