21,561 reputation
12449
bio website ripple.com
location Oakland, CA
age 45
visits member for 3 years, 3 months
seen 2 days ago

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


Dec
30
answered What happens when you 'delete' a file as opposed to securely shredding it?
Dec
30
comment MySQL consuming nearly all memory in cache?
If you want the computer to use less RAM, remove some RAM from the computer. It's not like if you use only 12GB today you can use 36GB tomorrow.
Dec
30
comment Out of memory errors on imapsync
What flags are you passing it? You should be passing "--useheader 'Message-ID'", for example.
Dec
30
answered Redis taking up all server memory. What to do?
Dec
30
comment Why is static page response time going up with increased concurrent requests
Are you sure you're measuring the CPU usage accurately? System CPU usage counts too.
Dec
30
comment why stat() does not work from windows service
No. It's not a permissions issue, it's a namespace issue. Normally, you wouldn't want the user to be messing with the service's mounts.
Dec
29
awarded  Enlightened
Dec
29
awarded  Nice Answer
Dec
29
comment Peering with an internet exchange
If you know what to avoid, PCs work just fine as routers. And I agree, a /24 is a reasonable minimum or you won't actually get the redundancy and shortcuts you're paying for. (Peers of your providers won't accept your route, so outside of their networks you'll only get the benefit of the larger covering route that goes to the provider you got the address from. And if that providers loses connectivity to any of those networks, they'll have no route to you at all. Also horrible things happen if your providers lose links to each other.)
Dec
29
comment Peering with an internet exchange
It won't matter for him. He'll only be talking BGP with people he pays money to. They won't care how big or small his route is. (He may get slightly sub-optimal routes and slightly impaired redundancy, but with at least a /24, it won't likely be significant.)
Dec
29
answered why stat() does not work from windows service
Dec
29
comment Peering with an internet exchange
@RayQuang Then peering is not what you want. You want transit. You want an AS and connections to two or three providers. (That may be available at this exchange. In that case, the open peering may be a minor bonus. Beware of things like port and cross-connect fees that eat up the savings of going to the exchange. Two or three lines to your place of business may be a better deal. You also typically get better redundancy that way -- imagine if you lose your link to the exchange!)
Dec
29
revised Peering with an internet exchange
added 220 characters in body
Dec
29
comment Peering with an internet exchange
The exchange can't force other networks to peer with you. They may not care who peers with who, but the other companies you might hope to peer with will. Did you get a list of networks that meet there that have open peering? Do you need to exchange significant traffic with those particular networks? If not, you are barking up the wrong tree. (And many of them will have traffic minimums. They can't justify the port for a dribble.)
Dec
29
answered Peering with an internet exchange
Dec
29
comment Peering with an internet exchange
You do understand that peering does not get you Internet connectivity, right? It only allows you to exchange traffic with the particular networks you peer with. (Most networks will not peer with you unless you meet peering requirements that you will definitely not meet.)
Dec
29
answered Forward port on same machine?
Dec
29
answered Why is static page response time going up with increased concurrent requests
Dec
29
comment Options for non-virtualized network interface isolation?
I am baffled by what you're trying to accomplish. Local traffic cannot be DMZ->LAN or LAN->DMZ, it's just local. (The traffic originates on this machine and is destined for this machine, right?) This machine is not routing remote traffic and there's no conceivable security reason to stop the machine from communicating with itself.
Dec
28
comment mysql socket issues
The errors that you are experiencing are explained in the logs you pasted. Look for "ERROR". The server is not running.