231 reputation
19
bio website sdiz.net
location Hong Kong, Hong Kong
age 30
visits member for 4 years, 10 months
seen Mar 24 at 2:36

PHP is for insane.


Sep
12
awarded  Popular Question
Apr
19
awarded  Yearling
Apr
18
answered is there a way to manage DNS without being a sysadmin?
Nov
7
answered About using cron in Linux to schedule my python program
Aug
31
comment How does one make sure or even guarantee server time are sync correctly between dozens of servers across multiple datacenter on different location?
btw, don't use cronjob to sync. Run the ntp daemon --- it would adjust the drift (make your clock go faster or slower) so the clock won't "jump".
Aug
31
comment How does one make sure or even guarantee server time are sync correctly between dozens of servers across multiple datacenter on different location?
what if someone accidentally modify the NTP date/time? What if NATO declare war with your data center? What if some alien want to screw up your server? Nothing can fix stupidity.
Aug
20
awarded  Autobiographer
Aug
11
comment better TCP performance over a “high delay network”
You got real hardware here. TCP take cpu, NIC have its own buffer, ACPI have its own limit, etc..
May
26
comment how to kill a zombie process?
zombie is dead -- you can't kill something dead. The parent should collect it. If it don't, kill the parent.
Apr
21
revised Server overloaded with log messages: tty_release_dev: pts0: read/write wait queue active!
deleted 48 characters in body
Apr
21
answered Server overloaded with log messages: tty_release_dev: pts0: read/write wait queue active!
Nov
17
comment Amazon cloud: What should I backup exactly?
what does "other ec2 instances come with local storage" means? If you means EBS -- it is backup automatically. Some "local storage" would vanish on shutdown.
Nov
17
comment Amazon cloud: What should I backup exactly?
see aws.amazon.com/ebs , EBS is replicated as well.
Nov
17
comment Amazon cloud: What should I backup exactly?
Amazon always backup your data (unless you use the Reduced Redundancy one). But you should still take backup, to protect yourself from the "drunk sysadmin type the wrong rm -fr" case.
Nov
17
answered Amazon cloud: What should I backup exactly?
Nov
13
comment MySQL Eating CPU Usage (Urgent)
CPU usage can't crash mysql. Did you check the memory usage as well?
Nov
9
awarded  Commentator
Nov
9
comment How to map an address to a custom one?
and you have to make tomcat bind on port 80
Nov
9
awarded  Critic
Nov
9
comment Secure Delete on SSD
I was answering ScottS. SSD don't keep old used block data.