20,988 reputation
12247
bio website ripple.com
location Oakland, CA
age 44
visits member for 2 years, 10 months
seen 1 hour ago

I am Chief Cryptographer at Ripple Labs and one of the architects of the Ripple payment system.


Nov
28
comment Mysql multi request at same time
@Khaled I didn't say it always does. I'm talking about the OP's specific case.
Nov
28
answered Mysql multi request at same time
Nov
27
comment MX records not correctly updated by the Google DNS servers
@Mac_Cain13 It's not resolved that way because the tools are smart enough to realize that it's meaningless nonsense. There is no coherent way to say what that's supposed to mean. A CNAME makes the source act as another name for the target. If you make wrep.nl act as another name for druif.wrep.nl, you have an infinite recursion.
Nov
27
comment Is it possible to rate limit based on host headers? i.e. not just on ip address
Why can't the client control the load it's placing on the server?
Nov
27
answered Is it possible to rate limit based on host headers? i.e. not just on ip address
Nov
27
comment MX records not correctly updated by the Google DNS servers
@Mac_Cain13 This is a recursive CNAME: wrep.nl. 2372 IN CNAME druif.wrep.nl. This says wrep.nl is a CNAME for druif.wrep.nl, which means druif.wrep.nl is druif. {CNAME for druif.wrep.nl} or druif.druif.wrep.nl, and so on.
Nov
25
comment MX records not correctly updated by the Google DNS servers
Wow! A recursive CNAME! I wonder who thought that was a good idea. If wrep.nl is a CNAME for druif.wrep.nl, then druif.wrep.nl is a CNAME for druif.druif.wrep.nl and so on. Not good.
Nov
25
comment Is it possible to recover a Hard-disk even after formatting and rewriting all space with new data?
There is a reasonable fear that it might theoretically be possible. But nobody has ever managed to do it on a modern hard disk.
Nov
25
revised VPS Memory Exchausted Even With Light Settings
added 128 characters in body
Nov
25
comment VPS Memory Exchausted Even With Light Settings
Ahh, yeah, OpenVZ doesn't give you an OS. Just a jail in which you can run processes. The output of free is basically meaningless. Essentially, the same problem I described in my answer is happening, but by design and in a place where you can't do anything about it.
Nov
25
answered VPS Memory Exchausted Even With Light Settings
Nov
25
answered Can a Linux system crash cause network issues?
Nov
25
comment Keepalived for more than 20 virtual addresses
The destination network should be the set of 20+ IPs, not a single IP.
Nov
23
comment Keepalived for more than 20 virtual addresses
I think that approach makes good sense.
Nov
23
comment How can I find my subnet mask?
Yeah, if the machine is already setup or DHCP is in use and you only have one IP address, they may not give you any other information. (And for a dynamic IP, even the subnet mask might change.) But then you can always use your device's network information tools to find the subnet mask.
Nov
23
comment Time+ (CPU Time) column in top command is incorrectly reporting
You're 100% sure you were looking at the same process ID each time?
Nov
23
comment How can I find my subnet mask?
I have never had that happen (since CIDR), and I've been in the networking business on almost every possible end since CIDR took over. I have always given, or been given, a complete IP configuration sheet. Everyone who has been in this business for more than a month knows you just give them all the information they could possibly need and then they don't have to go back and forth with you.
Nov
23
answered How can I find my subnet mask?
Nov
23
answered URL Redirect to IP on LAN
Nov
22
comment 613 threads limit on debian
@KarlP : It is not unreasonable to want 100,000 tasks to coexist -- as you point out, Erlang makes that easy. It is unreasonable to want 100,000 POSIX threads to coexist when POSIX says you get 64 of them. POSIX threads are, by intentional design, heavy. They are just not the right tool for this job.