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visits member for 3 years, 2 months
seen Dec 19 at 10:58

Feb
22
awarded  Commentator
Feb
22
asked Encrypt MySQL column with ssh-key forwarded by ssh-agent
Jul
23
awarded  Popular Question
May
12
awarded  Supporter
May
12
awarded  Scholar
May
12
awarded  Editor
May
12
accepted SSH traffic redirect for LXC containers
May
12
revised FTP proxy with SSL support
added 23 characters in body
May
12
comment SSH traffic redirect for LXC containers
Thank you for your answer. I belive you meant ProxyCommand option. I was thinking about it too and HTTP proxy is really nice solution although it requires additional configuration on client side.
May
12
asked FTP proxy with SSL support
May
2
awarded  Tumbleweed
Feb
27
awarded  Student
Feb
27
asked SSH key based authentication in Perl server
Feb
17
asked SSH traffic redirect for LXC containers
Oct
7
comment What's worth changing in kernel configuration?
You are saying that it is better to buy the newest hardware than optimize you system? :)
Oct
6
comment What's worth changing in kernel configuration?
Nice answer :) I really enjoyed it.
Oct
6
comment What's worth changing in kernel configuration?
Hehe. If I had a boss and he would pay me €100 per hour it is still €800. I don't think you can buy a decent hardware for that. Anyway, I made a 20% boost on mail servers farm last time. :)
Oct
6
comment What's worth changing in kernel configuration?
Yes, you are right. I agree completely. My primary question was: what do you usually change in your kernel configuration? Are you using generic kernels? Do you disable power management? Do you disable preemption? Do you disable dynamic ticks? Do you use namespaces? Do you create modules or not? Why not? etc.
Oct
6
comment What's worth changing in kernel configuration?
I disagree that kernel developers can help. Other admins having similar issues would be better. I can define a workload as 3 types: web servers, db servers and shell servers. On web servers you have many nginx, php/python/ruby processes. On db servers you have MySQL and on shell servers you have everything else - irssi, screens, crontab jobs running shell scripts and so on. Answering my own question (what I expected to see) is for example: with this type of workload you should have preemption and 300Hz ticks and deadline IO scheduler - then system will be more responsive.
Oct
6
comment What's worth changing in kernel configuration?
Tune it for better performance. As I wrote I have hundreds of users with shell access doing dirty things.