Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: [ANNOUNCE] Ramback: faster than a speeding bullet | Date | Mon, 17 Mar 2008 00:16:18 -0800 |
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On Sunday 16 March 2008 23:49, david@lang.hm wrote: > > Mirroring on the other hand, makes a realtime copy of a volume, that is > > never out of date. > > so just mirror to a local disk array then.
Great idea. Except that the disk array has millisecond level latency, when what we trying to achieve is microsecond level latency.
> a local disk array has more write bandwidth than a network connection to a > remote machine, so if you can mirror to a remote machine you can mirror to > a local disk array.
So you could potentially connect to a _huge_ disk array and write deltas to it. The disk array would have to support roughly 3 Gbytes/second of write bandwidth to keep up with the Violin ramdisk. Doable, but you are now in the serious heavy iron zone.
Personally, I like my nice simple design a lot more. Just mirror it, as many times as you need to satisfy your paranoia. Or how about go write your own?
Daniel
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