Posts by Craig McAllister15 posts • joined Friday 13th June 2008 14:40 GMT
You must never have used infiniband then?
Who buys computer bits at Maplin?
I mean... honestly!
Your points are fine but actually I think that disk will die because it satisfies neither requirement properly leaving flash and tape to do all the jobs.
What's the point of spinning disk if your entire infrastructure is built around the speed of flash?
You can't do anything productive with disk if it's 100 times too slow... so you just end up with more flash instead.
I appreciate that many people won't agree!
<flame suit on>
General literacy standards at an all time low? I call BS.
Education in this country is universal. It wasn't always thus.
C
ps. Things could always be better.
Ideally O2/Be would just cease providing service over non LLU lines.
The unbundled service they provide is amazing - the BT-based one, on the other hand, is a load of tripe. It gives people who don't understand the difference a bad opinion of o2 broadband overall.
Leave BT to provide BT-based broadband, and let the market sort out the rest.
C
... but it's electric. And they need to sort out that transmission-whine noise, it's horrific.
C
...of 2.5TB?
Craig
That was my point, really.
Diligent (Protectier) does >900MB/sec dedupe today, off two boxes of commodity hardware clustered together. It scales hugely (1PB, off the shelf) because it's less limited by memory scaling problems than "traditional" (if there is such a thing) hash-based dedupe algorithms are.
Yes, ZFS will do dedupe for free (if you consider storage I/O, processor and RAM to be free). Diligent isn't free, but it's more effective than the mooted ZFS dedupe will be anyhow.
Forgive the slightly combatative way of asking the question, I've just finished writing a whitepaper on this stuff, and comparing hash-based dedupe to diligent's fingerprinting approach is sort of like comparing the ark to the Ark royal.
Cheers
C
Question: Does ZFS offer memory-based inline deduplication for free at >900MB/sec? Is it hash based?
C
...for the aforementioned cache GB/MB fubar.
still, 64MB is a lot for a spinny disk cache. For the record, SSDs usually come with more (eg. Samsung's 256GB one comes with a 128MB cache).
Craigy
I *cannot* believe this guy doesn't know the difference between backups for corruption protection versus replication for server failure.
As for the costs... backup isn't expensive.
Novatech have this available to order:
http://www.novatech.co.uk/novatech/specpage.html?WD-20EADS
C
SSL proxy, anyone?
Paris, because of the obvious pr0n connotation
C
3MW is about 4000 horsepower. A top fuel dragster produces about 8000 horsepower.
Of course, Whylie E coyote can't catch either of these.
C
