Viewing profile — jleahy

Yes hard links aren't supported in TernFS. They would actually be really difficult to make work in this kind of sharded metadata design as they would need to be reference counted a…

(disclaimer: CTO of XTX) It was a long long time ago that we were only using NFS, it ran on top of a Solaris machine running ZFS. It did its job at the very beginning, but you don'…

(disclaimer: CTO of XTX) These limits aren't quite as strict as they first seem. Our median file size is 2MB, which means 50% of our files are It works out of the box with "normal"…

> So no RDMA? We can saturate the network interfaces of our flash boxes with our very simple Go block server, because it uses sendfile under the hood. It would be easy to switch to…

2MB median to be fair, so half of our files are under 2MB.

Trading using ML.

could be a tectonic shift in the open source filesystem landscape?

The seamless realtime intercontinental replication is a key feature for us, maybe the most important single feature, and AFAIK you can’t do that with Ceph (even if Ceph could scale…

It's just not optimised for tiny files. It absolutely would work with no problems at all, and you could definitely use it to store 100 billion 1kB files with zero problems (and tha…

The point is that they need to be synchronised in order to respond to changes in load.

That’s not correct. The frequency provides an indication of how much power is being drawn. If the frequency is low then generators supply more power to bring it back to 60 Hz. If t…

ICE is the name of the derivatives exchange, which is in Chicago. The cash market is called NYSE. The parent post said ‘ICE AND NYSE’.

ICE is actually in Chicago.

In my experience a large % of the daily trade volume comes from me.

The spread between SPX and ES is purely mechanical. It’s a function of expected future interest rates and dividends over the remaining life of the future. There is no such thing as…

ES trumps the others.

The Topping MX3 is also pretty good in my opinion and about half the price. That’s probably next down on the pareto frontier.

At very least it looks like it can do what TLA can do whilst being dramatically less painful to learn / work with. That is very much enough to be interesting.

Even hitting RAM takes the best part of 100ns. They probably mean 5-10us given the ‘6x faster’ thing.

Well it says "Limited adoption so far; CXL expected to accelerate through 2022 and 2023" (which didn't happen), so presumably 2021.

Well it does work in hardware, but not with the normal shift instruction. Just use a ‘double shift’ which you can get with __int128 (or with inline asm, or just full asm).

Yes, it happens to people every day for all kinds of boring reasons. Normally because they made a mistake in their flight plan. Remember anyone flying IFR needs a flight plan, lots…

Well they can reject the bad flight plan and the plane will not be allowed to follow it.

I used to have a Brother laser but now have a Kyocera color laser MFP, it works beautifully so that’s another good option. Also a networked printer is a lot less faff if you have a…