why does running redis-server & display output to console?

[S Ahmed]

Just firing up a vm to test things out, and when I manually install redis-server and then run it using:

redis-server &

(trying to run it in the background so I can continue working/benchmarking on the vm)

It seems to output things to the console, am I doing this wrong?

[Alexander Zhuravlev]

If you do not pass a path to redis-server it starts up with a default
config. In default configuration redis works in foreground.

You need to open redis.conf in the root of the redis distribution, set
configuration option daemonize to yes and start the server as follows:

./redis-server ../redis.conf

--
Alexander Zhuravlev

[S Ahmed]

I see, thanks for the tip.

--
Alexander Zhuravlev

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[Scott Smith]

Otherwise you need to redirect standard out to another file descriptor.

[Josiah Carlson]

For the OP: check out 'man nohup'. It does exactly what you want to
do, and writes stdout/stderr to a file automatically.

Regards,
- Josiah

[S Ahmed]

I'm on ubuntu and it seems the version of redis is 2.0.1 or something.

I'm doing some simple benchmarks and like the convieninece of not having ot manually build and setup the startup scripts etc.

Are there any big changes performance wise in the latest version? Or any memory leaks/major bugs in older versions?

BTW, where should I be looking for the redis.conf?

[S Ahmed]

Exciting to test things out on a real server (I was doing VM's before), and I am on:

Ubuntu 10.04.3 LTS \n \l

When I installed redis-server from the default package, and try and run redis-cli I see this:

usage: redis-cli [-h host] [-p port] [-r repeat_times] [-n db_num] cmd arg1 arg2 arg3 ... argN

usage: echo "argN" | redis-cli [-h host] [-p port] [-r repeat_times] [-n db_num] cmd arg1 arg2 ... arg(N-1)

If a pipe from standard input is detected this data is used as last argument.

example: cat /etc/passwd | redis-cli set my_passwd

example: redis-cli get my_passwd

example: redis-cli -r 100 lpush mylist x

When testing things on 11.04 I guess it was more up-to-date version as it went into cli no problem.

Even doing redis-server --version gives me (as root) : 

18 Dec 18:00:32 * Fatal error, can't open config file

[Greg Andrews]

The Ubuntu 10.04 package installs a two year old version of Redis (v1.2.0).  It's not really worth bothering with that version, in my opinion.

The Ubuntu 11.04 package is better - it installs 2.0.1 (just over one year old), and puts the configuration files in /etc/redis.  My workplace standardized on 2.0.1, and we've been installing the 11.04 package on 10.04 servers without any ill effects so far as we know.

However, 2.0.1 has a simple master/slave replication protocol that can sometimes fail to notice that the connection to the master has gone away.  I had to write an extra test into my Nagios plug-in to detect that replication problem.  v2.2.x (I don't remember which one) improved the replication protocol to detect lost connections and re-connect.

  -Greg

[Josiah Carlson]

Also, more recent versions of Redis have a better memory allocator
included by default (jemalloc), reducing memory fragmentation and
improving performance overall.

Regards,
- Josiah

[S Ahmed]

thanks, I found a tutorial that held my hand through buildng from source and setting up startup scripts etc.

[KH Cheng]

redis-server --daemonize yes

will run the server in the background without showing the logs to your terminal

For more configuration information, check out http://redis.io/topics/config