mprovost

57 ms·

601.
by mprovost 10y ago
I'm not an expert in Ceph but I've built many other storage solutions and typically where distributed filesystems fall down in performance is with small files. Even something like an Isilon can get into trouble with those kinds of
602.
by mprovost 10y ago
In the end it doesn't really say that they rolled their own on prem solution. For the kind of money they were forking out in the cloud you could just buy a Netapp or Isilon and get something that provides enough consistent storage perf
603.
by mprovost 10y ago
You don't solve storage performance problems by moving to S3. They're looking at response times in the hundreds of milliseconds - it's common to see multiple second response times from S3 (at least on AWS), sometimes they can
604.
by mprovost 10y ago
Those were caused because Cisco by default (optimistically) partitioned a big chunk of the routing table memory for v6 routes. The fix was to reduce the memory usage for v6 and give that memory back for v4 routes. So really it was allocatin
605.
by mprovost 10y ago
During my time in LA I got the impression that most of these companies are situated in a location that makes it convenient for the executives/owners who mostly live in Santa Monica or along the coast and basically don't have to de
606.
by mprovost 10y ago
This sounds like a variation of the Dead Sea Effect - when things get bad, the staff with the best job prospects are the first to leave ( http://brucefwebster.com/2008/04/11/the-wetware-crisis-the-d... ).
607.
by mprovost 10y ago
Obama explicitly called out that if the UK leaves the EU, that it would be at the "back of the queue" for trade deals. There's much less incentive for the US to work on a treaty with a smaller country like the UK as opposed t
608.
by mprovost 11y ago
I'm struggling to think of other FPGA startups, do you know of any? It seems like if it were the silver bullet that it's often made out to be, then there would be more examples.
609.
by mprovost 11y ago
That's why I thought of Bluearc - it was a storage system so the overall throughput was ultimately limited by hard disks. The FPGAs were used to optimise all of the front end protocol and filesystem processing. I imagine the same is tr
610.
by mprovost 11y ago
There have been FPGA-based startups before, the one that comes to mind is Bluearc (implemented TCP and NFS stacks, and a filesystem in FPGAs in a network attached storage appliance, later acquired by HDS). The problem seems to be, that it t
611.
by mprovost 11y ago
Any examples of such a system?
612.
by mprovost 11y ago
I have dual US-NZ citizenship and I can think of no circumstance where if I was in trouble I would either: tell anyone that I was an American, or try and call the US Govt for help.
613.
by mprovost 11y ago
This is probably the best historical document looking at the original discussions around IPng (which eventually became v6). Interestingly these debates were happening right around the time of the invention of the www so there isn't a l
614.
by mprovost 11y ago
I don't think that's true - there were proposals that extended the address space in a backwards-compatible way but they were rejected in favour of a clean-slate approach that required rewriting everything and breaking existing net
615.
by mprovost 11y ago
Personally I think there is still room for a new version of IP. v6 is still only in single digits. If something better came along (that was backwards compatible!) you could potentially outstrip it. Just because some committee made a bad dec
616.
by mprovost 11y ago
You've actually hit upon (part of) the answer right there. While IPv4 was designed around the (then) new 32 bit processors of the day, the committee that came up with v6 decided to ignore the underlying hardware reality. There's n
617.
by mprovost 11y ago
An HD video stream from Netflix uses about 3GB per hour. So 100PB gives you about 4000 years of content.
618.
by mprovost 11y ago
Someone famously did this in LA: http://jalopnik.com/5516635/the-secret-of-las-10-year-old-fa...
619.
by mprovost 12y ago
When I moved overseas I was surprised how many dishes use currants like this one does. Or how it's used in drinks like Ribena. But it turns out that growing currants has been illegal in the US for most of the 20th century with some sta
620.
by mprovost 12y ago
There are a lot of other companies that need access to those films. For example, the people doing subtitles, or printing the film, or doing digital distribution. I doubt the systems that stored these movies were hacked directly, but once th
621.
by mprovost 12y ago
They mention the New Zealand testing scheme in the article, but it ran aground because of the issue of animal testing. The main way to test the drugs (apparently) is on laboratory animals, and there was a lot of opposition to killing animal
622.
by mprovost 12y ago
I would say that most places that are using XFS at scale are doing so with an external RAID array or SAN that handles all of the individual disks and presents a single logical LUN to the filesystem. ZFS is fairly unique in that it combines
623.
by mprovost 12y ago
One of those is an 8 year old benchmark, the other used a 9.6TB flash array so hardly a realistic storage platform. I'm not saying that ZFS performance is awful, just that other features like data protection come first. If you're
624.
by mprovost 12y ago
Most people I know that are looking for performance on Linux stick with XFS, but then again people that are serious about Linux aren't running ZFS anyway. And of course there aren't any benchmarks for XFS vs ZFS on Solaris. Where
625.
by mprovost 12y ago
Even on Solaris, ZFS doesn't have a great reputation for performance.
626.
by mprovost 12y ago
This was drilled into me back in the usenet days. If you see a cat command with a single argument it's almost always replaceable by a shell redirection, or in this case just by passing the filename as an argument to grep. If you'r
627.
by mprovost 12y ago
I'm always surprised when people recommend awk for pulling delimited sections of lines out of a file, cut is so much easier to work with.
628.
by mprovost 12y ago
Useless use of cat?
629.
by mprovost 12y ago
Or maybe their customers are asking them for it?
630.
by mprovost 12y ago
It might not have even been Verizon's mistake. When you peer with an ISP it is the customer's router that announces the routes. Announcing all of your networks individually is literally a one line change in most router configs so

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