21,058 reputation
12247
bio website ripple.com
location Oakland, CA
age 44
visits member for 2 years, 11 months
seen 20 hours ago

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


Mar
28
comment Why there are always 10% of loss when testing with mtr command?
Ten packets, one lost, 10% loss.
Mar
28
comment MS SQL Server connection reset on AWS if column has more than 39kb
Sounds like a misconfigured firewall is blocking ICMP.
Mar
28
comment Cisco 861 - Unable to traceroute
Your problem description is very poor. What happens when you try? What goes wrong? Do you get an error message?
Mar
28
comment Ubuntu server router - only 50% of upload bandwidth
Were you measuring speed at the router or at a machine connected to the router? If the former, you're not really measuring routing speed. If the latter, TCP settings won't have any effect because you're not using the router's TCP implementation -- it's just routing.
Mar
27
awarded  Good Answer
Mar
27
comment What could cause *every* command in RHEL to be executed by root?
It sounds like several users share user ID zero.
Mar
23
comment CentOS 6.4 64-bit Memory Usage really not adding up
@AltonXL I can think of several different things you could mean by that, some of which are correct and some of which are not.
Mar
22
answered CentOS 6.4 64-bit Memory Usage really not adding up
Mar
22
comment Can the estimated time of access times for distributed keyvalue stores be below 1ms?
If 100% of your data fits in RAM, then fine. But any time a request needs data not in RAM, you have that disk latency. No matter what the software does, you have that inherent limit.
Mar
21
awarded  Enlightened
Mar
21
awarded  Nice Answer
Mar
21
comment Can the estimated time of access times for distributed keyvalue stores be below 1ms?
Disks only spin so fast. There's a certain minimum latency associated with having to get the data.
Mar
21
answered How does this kind of SSL work?
Mar
21
comment TCP packet being retransmitted 7 times when sysctl tcp_retries1 is set to 3 - why?
Did you read the explanation of the setting? It's not the number of retries to attempt. It's the number of retries to attempt before changing strategies.
Mar
16
comment How to free the (unused) memory?
Without the exact error, how do we know if it's talking about virtual memory or physical memory? Process memory (like is set by ulimit) or system memory (available to all processes)? And so on.
Mar
16
comment How to free the (unused) memory?
Can you post the exact error? It's not clear what kind of memory shortage was involved? Also, the output of system memory status commands (like free and top), performed while you're having the problem, would be very helpful.
Mar
14
comment Default TCP connection backlog value in Windows
Languages or toolkits might have defaults.
Mar
14
answered What is the incentive to operate a TCP/IP node?
Mar
14
answered Default TCP connection backlog value in Windows
Mar
14
comment Port Forwarding - Two Gateways Routing - One Network Card
I'd just put a Linux machine in front of the workstation. It can be a cheap little SoHo router running OpenWRT or the like.