I am wondering how to configure squid (or tinyproxy) to cache EVERYTHING and return HTTP 200 hits, even on Internet outage or if original source is 404?
Basically, I want squid to look in the cache and return whatever it finds there.
I have read the config files for each. Tiny does not seem very configurable at all, and while squid has lots of options, I could not find the option to return hits even if the original site is offline or the link 404.
I am preparing for setting up a MySQL master-slave or master-master relationship. Right now I have a single MySQL production server, and of course I don't want a lot of downtime while I connect the slave.
Is there no way I can make connect an empty slave and let it "slowly" synchronize data from the master, until they are identical?
I have noticed that I can take a transactional dump with mysqldump on the master and then import that into the slave, but by the time the slave has imported the dump, a lot of new rows will have been written and how will the slave get these?
I hope I am missing something obvious here, but extensive googling gives such advice such as "since this will result in less downtime in the future, some downtime now maybe isn't such a bad thing". But I would really like to avoid that.
Related question for MyISAM, but I use InnoDB.
There are examples for how to make Monit detect a service going amok and use too much RAM. But what if the service forks a program and the child takes too much RAM?
Or put another way, how can I make Monit detect and act on any random process which is spawned and starts eating all the RAM. Before the evil OOM starts killing processes left and right...
I always assumed that Windows assumes that it is on the Internet when there is a default gateway.
Turns out this is not the case!
How does it judge, it is on the Internet? Does it "phone home"?
I have enabled kernel level IP configuration in my linux kernel and compiled it, but it does not try get any DHCP address. Why?
Is there something extra or special I have to do?
I am trying to run my old Ubuntu 6.06 on a newer 8.04 with backported XEN 3.3
I have tried a million different kernels.
The closest I got was booting up to when getty should present a console, i.e. just kernel messages, then nothing on the XEN console.
I can ping the domU, but not SSH into it.
I have tried kernels from within the domU filesystem with pygrub, XEN kernels from 8.10, 8.04. I have also tried compiling XEN kernels myself and point them out directly in the domU config file. I tried downloading a precompiled kernel from XEN.org. All these failed with various version of "can not load" messages. (Some disguised as can not allocate memory errors.)
Hardware is 32 bit Pentium IV. (Not 64 bit capable.)
Update: I waited a looong time (maybe half an hour) and now I can login. However I am met by a lot of:
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
Hitting CTRL-C got me a prompt, so things seem to work.