21,048 reputation
12247
bio website ripple.com
location Oakland, CA
age 44
visits member for 2 years, 11 months
seen 18 hours ago

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


Mar
11
comment What is the impact of increasing “nofile” limits in /etc/security/limits.conf?
The operating systems can, it's the applications that get into trouble.
Mar
9
comment Getting 'out of memory aborted' on booting
This is due to MegaRAID bug ID SCGCQ00357046. Upgrade the firmware on your 9240-8i.
Mar
9
comment esxi host memory usage increasing
Memory can only be used or wasted. You can't save it for later.
Mar
4
comment Server with 3 network cards
Just use one network card. You can assign as many IP addresses to the machine as you want.
Mar
4
comment Server with 3 network cards
It would help a lot to understand what you're trying to accomplish.
Mar
4
comment Server with 3 network cards
See this answer for more on why this is a bad idea. Linux uses a weak end system model where IP addresses belong to the machine as a whole, not to just one of its interfaces.
Mar
4
comment Server with 3 network cards
It's not clear what you're saying. Do you mean you can't ping them from this very machine? Or do you mean you can't ping them from some other machine? How are the three links connected? All to the same switch?!
Mar
4
comment blocking all countries except 4 at vlan level, will cisco asa 5505 hold?
You have to block the traffic causing the harm before it gets to the device that it is harming.
Mar
4
comment Virtual Allocation Unreasonably High
Why is this a problem for you? Virtual memory is effectively free.
Feb
27
comment Is it required to register a name server with GLUE records?
If ns1.mydnsservers.net is not a nameserver for the domain mydnsservers.net, then no glue is needed. If it is, then glue is needed.
Feb
27
comment Is it required to register a name server with GLUE records?
How could it possibly work without glue? Say I want to resolve ns1.mydnsservers.net. Telling me that I need to ask ns1.mydnsservers.net for the answer doesn't help me. I need an IP address, and without glue, the only way to get it is by asking the very same servers whose IP addresses I didn't know in the first place!
Feb
25
comment Mail server is seen under different IP by other mail servers, than it has --> mail marked as spam
Does your provider permit you to run a mail server? This really looks like they do not.
Feb
25
comment Mail server is seen under different IP by other mail servers, than it has --> mail marked as spam
Are the emails spam or do they look like spam?
Feb
25
comment Hosting medium sized files - do I need a 1000mbps connection?
You're asking us to predict what your service's bandwidth requirements will be?
Feb
25
comment What is the impact of increasing “nofile” limits in /etc/security/limits.conf?
@Adam That suggests strongly that it's legitimate usage and thus that raising the limit is appropriate.
Feb
24
comment Strange load average behaviour
What exactly is this measuring?
Feb
23
comment Is RAM size related to SQL performance?
@ChristopherPerrin Decades of experience and seeing these exact same results many, many times.
Feb
23
comment Unable to access 3ware 3dm2 web interface, failed to start listening socket
What happens when you try?
Feb
22
comment Unable to access 3ware 3dm2 web interface, failed to start listening socket
The service is already running. Why are you trying to run it more?
Feb
22
comment Does AWS EC2 have limits on concurrent connections?
What happens when you try to get more connections?