NAME rq v3.1.0 SYNOPSIS rq (queue | export RQ_Q=q) mode [mode_args]* [options]* URIS http://rubyforge.org/projects/codeforpeople/ http://codeforpeople.com/lib/ruby/rq/ http://www.linuxjournal.com/article/7922 INSTALL manual (cluster wide): - download latest release from URI(S) above - tar xvfz rq-X.X.X.tgz - cd rq-X-X-X.tgz - cd all - ./install.sh /full/path/to/nfs/mounted/directory/ gems (per node): gem install rq DESCRIPTION ruby queue (rq) is a zero-admin zero-configuration tool used to create instant unix clusters. rq requires only a central nfs filesystem in order to manage a simple sqlite database as a distributed priority work queue. this simple design allows researchers with minimal unix experience to install and configure, in only a few minutes and without root privileges, a robust unix cluster capable of distributing processes to many nodes - bringing dozens of powerful cpus to their knees with a single blow. clearly this software should be kept out of the hands of free radicals, seti enthusiasts, and one mr. j safran. the central concept of rq is that n nodes work in isolation to pull jobs from an centrally mounted nfs priority work queue in a synchronized fashion. the nodes have absolutely no knowledge of each other and all communication is done via the queue meaning that, so long as the queue is available via nfs and a single node is running jobs from it, the system will continue to process jobs. there is no centralized process whatsoever - all nodes work to take jobs from the queue and run them as fast as possible. this creates a system which load balances automatically and is robust in face of node failures. although the rq system is simple in it's design it features powerful functionality such as priority management, predicate and sql query , compact streaming command-line processing, programmable api, hot-backup, and input/capture of the stdin/stdout/stderr io streams of remote jobs. to date rq has had no reported runtime failures and is in operation at dozens of research centers around the world. INVOCATION the first argument to any rq command is the always the name of the queue while the second is the mode of operation. the queue name may be omitted if, and only if, the environment variable RQ_Q has been set to contain the absolute path of target queue. for instance, the command ~ > rq queue list is equivalent to ~ > export RQ_Q=queue ~ > rq list this facility can be used to create aliases for several queues, for example, a .bashrc containing alias MYQ="RQ_Q=/path/to/myq rq" alias MYQ2="RQ_Q=/path/to/myq2 rq" would allow syntax like MYQ2 submit < joblist MODES rq operates in modes create, submit, resubmit, list, status, delete, update, query, execute, configure, snapshot, lock, backup, rotate, feed, recover, ioview, cron, help, and a few others. the meaning of 'mode_args' will naturally change depending on the mode of operation. the following mode abbreviations exist, note that not all modes have abbreviations c => create s => submit r => resubmit l => list ls => list t => status d => delete rm => delete u => update q => query e => execute C => configure S => snapshot L => lock b => backup R => rotate f => feed io => ioview 0 => stdin 1 => stdout 2 => stderr h => help create, c : creates a queue. the queue must be located on an nfs mounted file system visible from all nodes intended to run jobs from it. nfs locking must be functional on this file system. examples : 0) to create a queue ~ > rq /path/to/nfs/mounted/q create or, using the abbreviation ~ > rq /path/to/nfs/mounted/q c submit, s : submit jobs to a queue to be proccesed by some feeding node. any 'mode_args' are taken as the command to run. note that 'mode_args' are subject to shell expansion - if you don't understand what this means do not use this feature and pass jobs on stdin. when running in submit mode a file may by specified as a list of commands to run using the '--infile, -i' option. this file is taken to be a newline separated list of commands to submit, blank lines and comments (#) are allowed. if submitting a large number of jobs the input file method is MUCH, more efficient. if no commands are specified on the command line rq automatically reads them from stdin. yaml formatted files are also allowed as input (http://www.yaml.org/) - note that the output of nearly all rq commands is valid yaml and may, therefore, be piped as input into the submit command. the leading '---' of yaml file may not be omitted. when submitting the '--priority, -p' option can be used here to determine the priority of jobs. priorities may be any whole number including negative ones - zero is the default. note that submission of a high priority job will NOT supplant a currently running low priority job, but higher priority jobs WILL always migrate above lower priority jobs in the queue in order that they be run as soon as possible. constant submission of high priority jobs may create a starvation situation whereby low priority jobs are never allowed to run. avoiding this situation is the responsibility of the user. the only guaruntee rq makes regarding job execution is that jobs are executed in an 'oldest-highest-priority' order and that running jobs are never supplanted. jobs submitted with the '--stage' option will not be eligible to be run by any node and will remain in a 'holding' state until updated (see update mode) into the 'pending' mode, this option allows jobs to entered, or 'staged', in the queue and then made candidates for running at a later date. rq allows the stdin of commands to be provided and also captures the stdout and stderr of any job run (of course standard shell redirects may be used as well) and all three will be stored in a directory relative the the queue itself. the stdin/stdout/stderr files are stored by job id and there location (though relative to the queue) is shown in the output of 'list' (see docs for list). examples : 0) submit the job ls to run on some feeding host ~ > rq q s ls 1) submit the job ls to run on some feeding host, at priority 9 ~ > rq -p9 q s ls 2) submit a list of jobs from file. note the '-' used to specify reading jobs from stdin ~ > cat joblist job1.sh job2.sh job2.sh ~ > rq q submit --infile=joblist 3) submit a joblist on stdin ~ > cat joblist | rq q submit - or ~ > rq q submit - rq q submit cat --stdin=cat.in 5) submit cat as a job, providing the stdin for the cat job on stdin ~ > cat cat.in | rq q submit cat --stdin=- or ~ > rq q submit cat --stdin=- wc -l cmdfile 42 ~ > rq -p9 -timportant q s < cmdfile 6) re-submit all the 'important' jobs (see 'query' section below) ~ > rq q query tag=important | rq q s - 8) re-submit all jobs which are already finished (see 'list' section below) ~ > rq q l f | rq q s 9) stage the job wont_run_yet to the queue in a 'holding' state. no feeder will run this job until it's state is upgraded to 'pending' ~ > rq q s --stage wont_run_yet resubmit, r : resubmit jobs back to a queue to be proccesed by a feeding node. resubmit is essentially equivalent to submitting a job that is already in the queue as a new job and then deleting the original job except that using resubmit is atomic and, therefore, safer and more efficient. resubmission respects any previous stdin provided for job input. read docs for delete and submit for more info. examples : 0) resubmit job 42 to the queue ~> rq q resubmit 42 1) resubmit all failed jobs ~> rq q query exit_status!=0 | rq q resubmit - 2) resubmit job 4242 with different stdin ~ rq q resubmit 4242 --stdin=new_stdin.in list, l, ls : list mode lists jobs of a certain state or job id. state may be one of pending, holding, running, finished, dead, or all. any 'mode_args' that are numbers are taken to be job id's to list. states may be abbreviated to uniqueness, therefore the following shortcuts apply : p => pending h => holding r => running f => finished d => dead a => all examples : 0) show everything in q ~ > rq q list all or ~ > rq q l all or ~ > export RQ_Q=q ~ > rq l 1) show q's pending jobs ~ > rq q list pending 2) show q's running jobs ~ > rq q list running 3) show q's finished jobs ~ > rq q list finished 4) show job id 42 ~ > rq q l 42 5) show q's holding jobs ~ > rq q list holding status, t : status mode shows the global state the queue and statistics on it's the cluster's performance. there are no 'mode_args'. the meaning of each state is as follows: pending => no feeder has yet taken this job holding => a hold has been placed on this job, thus no feeder will start it running => a feeder has taken this job finished => a feeder has finished this job dead => rq died while running a job, has restarted, and moved this job to the dead state note that rq cannot move jobs into the dead state unless it has been restarted. this is because no node has any knowledge of other nodes and cannot possibly know if a job was started on a node that subsequently died, or that it is simply taking a very long time to complete. only the node that dies, upon restart, can determine that it owns jobs that 'were started before it started running jobs', an impossibility, and move these jobs into the dead state. normally only a machine crash would cause a job to be placed into the dead state. dead jobs are automatically restarted if, and only if, the job was submitted with the '--restartable' flag. status breaks down a variety of canned statistics about a nodes' performance based solely on the jobs currently in the queue. only one option affects the ouput: '--exit'. this option is used to specify additionaly exit code mappings on which to report. normally rq will report any job with an exit code of 0 as being 'successes' and any job with an exit code that is not 0, or a status of 'dead', as being 'failures'. if the '--exit' switch is used then additional mappings can be specified, note that the the semantics for 'successes' and 'failures' does not change - this keyword specifies extra mappings. examples : 0) show q's status ~ > rq q t 2) show q's status, consider any exit code of 42 will be listed as 'ok' ~ > rq q t --exit ok=42 3) show q's status, consider any exit code of 42 or 43 will be listed as 'ok' and 127 will be listed as 'command_not_found'. notice the quoting required. ~ > rq q t --exit 'ok=42,43 command_not_found=127' delete, d : delete combinations of pending, holding, finished, dead, or jobs specified by jid. the delete mode is capable of parsing the output of list and query modes, making it possible to create custom filters to delete jobs meeting very specific conditions. 'mode_args' are the same as for list. note that it is NOT possible to delete a running job. rq has a decentralized architechture which means that compute nodes are completely independant of one another; an extension is that there is no way to communicate the deletion of a running job from the queue the the node actually running that job. it is not an error to force a job to die prematurely using a facility such as an ssh command spawned on the remote host to kill it. once a job has been noted to have finished, whatever the exit status, it can be deleted from the queue. examples : 0) delete all pending, finished, and dead jobs from a queue ~ > rq q d all 1) delete all pending jobs from a queue ~ > rq q d p 2) delete all finished jobs from a queue ~ > rq q d f 3) delete jobs via hand crafted filter program ~ > rq q list | yaml_filter_prog | rq q d - an example ruby filter program (you have to love this) ~ > cat yaml_filter_prog require 'yaml' joblist = YAML::load STDIN y joblist.select{|job| job['command'] =~ /bombing_program/} this program reads the list of jobs (yaml) from stdin and then dumps only those jobs whose command matches 'bombing_program', which is subsequently piped to the delete command. update, u : update assumes all leading arguments are jids to update with subsequent key=value pairs. currently only the 'command', 'priority', and 'tag' fields of pending jobs can be generically updated and the 'state' field may be toggled between pending and holding. examples: 0) update the priority of job 42 ~ > rq q update 42 priority=7 1) update the priority of all pending jobs ~ > rq q update pending priority=7 2) query jobs with a command matching 'foobar' and update their command to be 'barfoo' ~ > rq q q "command like '%foobar%'" |\ rq q u command=barfoo 3) place a hold on jid 2 ~ > rq q u 2 state=holding 4) place a hold on all jobs with tag=disk_filler ~ > rq q q tag=disk_filler | rq q u state=holding - 5) remove the hold on jid 2 ~ > rq q u 2 state=pending query, q : query exposes the database more directly the user, evaluating the where clause specified on the command line (or read from stdin). this feature can be used to make a fine grained slection of jobs for reporting or as input into the delete command. you must have a basic understanding of SQL syntax to use this feature, but it is fairly intuitive in this limited capacity. examples: 0) show all jobs submitted within a specific 10 minute range ~ > a='2004-06-29 22:51:00' ~ > b='2004-06-29 22:51:10' ~ > rq q query "started >= '$a' and started < '$b'" 1) shell quoting can be tricky here so input on stdin is also allowed to avoid shell expansion ~ > cat constraints.txt started >= '2004-06-29 22:51:00' and started < '2004-06-29 22:51:10' ~ > rq q query < contraints.txt or (same thing) ~ > cat contraints.txt| rq q query - 2) this query output might then be used to delete those jobs ~ > cat contraints.txt | rq q q - | rq q d - 3) show all jobs which are either finished or dead ~ > rq q q "state='finished' or state='dead'" 4) show all jobs which have non-zero exit status ~ > rq q query exit_status!=0 5) if you plan to query groups of jobs with some common feature consider using the '--tag, -t' feature of the submit mode which allows a user to tag a job with a user defined string which can then be used to easily query that job group ~ > rq q submit --tag=my_jobs - < joblist ~ > rq q query tag=my_jobs 6) in general all but numbers will need to be surrounded by single quotes unless the query is a 'simple' one. a simple query is a query with no boolean operators, not quotes, and where every part of it looks like key op value with ** NO SPACES ** between key, op, and value. if, and only if, the query is 'simple' rq will contruct the where clause appropriately. the operators accepted, and their meanings, are = : equivalence : sql = =~ : matches : sql like !~ : not matches : sql not like match, in the context is ** NOT ** a regular expression but a sql style string match. about all you need to know about sql matches is that the '%' char matches anything. multiple simple queries will be joined with boolean 'and' this sounds confusing - it isn't. here are some examples of simple queries 6.a) query : rq q query tag=important where_clause : "( tag = 'important' )" 6.b) query : rq q q priority=6 restartable=true where_clause : "( priority = 6 ) and ( restartable = 'true' )" 6.c) query : rq q q command=~%bombing_job% runner=~%node_1% where_clause : "( command like '%bombing_job%') and (runner like '%node_1%')" execute, e : execute mode is to be used by expert users with a knowledge of sql syntax only. it follows the locking protocol used by rq and then allows the user to execute arbitrary sql on the queue. unlike query mode a write lock on the queue is obtained allowing a user to definitively shoot themselves in the foot. for details on a queue's schema the file 'db.schema' in the queue directory should be examined. examples : 0) list all jobs ~ > rq q execute 'select * from jobs' configure, C : this mode is not supported yet. snapshot, p : snapshot provides a means of taking a snapshot of the q. use this feature when many queries are going to be run; for example when attempting to figure out a complex pipeline command your test queries will not compete with the feeders for the queue's lock. you should use this option whenever possible to avoid lock competition. examples: 0) take a snapshot using default snapshot naming, which is made via the basename of the q plus '.snapshot' ~ > rq /path/to/nfs/q snapshot 1) use this snapshot to chceck status ~ > rq ./q.snapshot status 2) use the snapshot to see what's running on which host ~ > rq ./q.snapshot list running | grep `hostname` note that there is also a snapshot option - this option is not the same as the snapshot command. the option can be applied to ANY command. if in effect then that command will be run on a snapshot of the database and the snapshot then immediately deleted. this is really only useful if one were to need to run a command against a very heavily loaded queue and did not wish to wait to obtain the lock. eg. 0) get the status of a heavily loaded queue ~ > rq q t --snapshot 1) same as above ~ > rq q t -s ** IMPORTANT ** a really great way to hang all processing in your queue is to do this rq q list | less and then leave for the night. you hold a read lock you won't release until less dies. this is what snapshot is made for! use it like rq q list -s | less now you've taken a snapshot of the queue to list so your locks affect no one. lock, L : lock the queue and then execute an arbitrary shell command. lock mode uses the queue's locking protocol to safely obtain a lock of the specified type and execute a command on the user's behalf. lock type must be one of (r)ead | (sh)ared | (w)rite | (ex)clusive examples : 0) get a read lock on the queue and make a backup ~ > rq q L read -- cp -r q q.bak (the '--' is needed to tell rq to stop parsing command line options which allows the '-r' to be passed to the 'cp' command) ** IMPORTANT ** this is another fantastic way to freeze your queue - use with care! backup, b : backup mode is exactly the same as getting a read lock on the queue and making a copy of it. this mode is provided as a convenience. 0) make a backup of the queue using default naming ( qname + timestamp + .bak ) ~ > rq q b 1) make a backup of the queue as 'q.bak' ~ > rq q b q.bak rotate, r : rotate mode is conceptually similar to log rolling. normally the list of finished jobs will grow without bound in a queue unless they are manually deleted. rotation is a method of trimming finished jobs from a queue without deleting them. the method used is that the queue is copied to a 'rotation'; all jobs that are dead or finished are deleted from the original queue and all pending and running jobs are deleted from the rotation. in this way the rotation becomes a record of the queue's finished and dead jobs at the time the rotation was made. 0) rotate a queue using default rotation name ~ > rq q rotate 1) rotate a queue naming the rotation ~ > rq q rotate q.rotation 2) a crontab entry like this could be used to rotate a queue daily 59 23 * * * rq q rotate `date +q.%Y%m%d` feed, f : take jobs from the queue and run them on behalf of the submitter as quickly as possible. jobs are taken from the queue in an 'oldest highest priority' first order. feeders can be run from any number of nodes allowing you to harness the CPU power of many nodes simoultaneously in order to more effectively clobber your network, anoy your sysads, and set output raids on fire. the most useful method of feeding from a queue is to do so in daemon mode so that if the process loses it's controling terminal it will not exit when you exit your terminal session. use the '--daemon, -d' option to accomplish this. by default only one feeding process per host per queue is allowed to run at any given moment. because of this it is acceptable to start a feeder at some regular interval from a cron entry since, if a feeder is alreay running, the process will simply exit and otherwise a new feeder will be started. in this way you may keep feeder processing running even acroess machine reboots without requiring sysad intervention to add an entry to the machine's startup tasks. examples : 0) feed from a queue verbosely for debugging purposes, using a minimum and maximum polling time of 2 and 4 respectively. you would NEVER specify polling times this brief except for debugging purposes!!! ~ > rq q feed -v4 --min_sleep=2 --max_sleep=4 1) same as above, but viewing the executed sql as it is sent to the database ~ > RQ_SQL_DEBUG=1 rq q feed -v4 --min_sleep=2 --max_sleep=4 2) feed from a queue in daemon mode - logging to /home/ahoward/rq.log ~ > rq q feed --daemon -l/home/$USER/rq.log log rolling in daemon mode is automatic so your logs should never need to be deleted to prevent disk overflow. start : the start mode is equivalent to running the feed mode except the --daemon is implied so the process instantly goes into the background. also, if no log (--log) is specified in start mode a default one is used. the default is /home/$USER/$BASENAME_OF_Q.log examples : 0) start a daemon process feeding from q ~ > rq q start 1) use something like this sample crontab entry to keep a feeder running forever - it attempts to (re)start every fifteen minutes but exits if another process is already feeding. output is only created when the daemon is started so your mailbox will not fill up with this crontab entry: # # crontab.sample # */15 * * * * /path/to/bin/rq /path/to/q start and entry like this on every node in your cluster is all that's needed to keep your cluster going - even after a reboot. shutdown : tell a running feeder to finish any pending jobs and then to exit. this is equivalent to sending signal 'SIGTERM' to the process - this is what using 'kill pid' does by default. examples : 0) stop a feeding process, if any, that is feeding from q. allow all jobs to be finished first. ~ > rq q shutdown ** VERY IMPORTANT ** if you are keeping your feeder alive with a crontab entry you'll need to comment it out before doing this or else it will simply re-start!!! stop : tell any running feeder to stop NOW. this sends signal 'SIGKILL' (-9) to the feeder process. the same warning as for shutdown applies!!! examples : 0) stop a feeding process, if any, that is feeding from q. allow NO jobs to be finished first - exit instantly. ~ > rq q stop cron : when given 'start' for 'mode_args' this option automatically adds a crontab entry to keep a feeder alive indefinitely and starts a feeder in the background. this is a shortcut to start a feeder and ensure it stays running forever, even across re-boots. 'stop' as an argument applys the inverse option: any crontab entry is removed and the daemon shutdown nicely. a second argument of 'hard' will do a stop instead of a shutdown. the addition and subtraction of crontab entries is robust, however, if you already have crontab lines maintaining your feeders with a vastly different syntax it would be best to shut down, remove them, and then let rq manage them. then again, some people are quite brave... examples : 0) automatically add crontab entry and start daemon feeder ~ > rq q cron start 1) automatically remove crontab entry and shutdown daemon feeder nicely ~ > rq q cron shutdown 2) the same, but using stop instead of shutdown ~ > rq q cron stop pid : show the pid, if any, of the feeder on this host ~ > rq q feeder --- pid : 3176 ioview, io : as shown in the description for submit, a job maybe be provided stdin during job submission. the stdout and stderr of the job are also captured as the job is run. all three streams are captured in files located relative to the queue. so, if one has submitted a job, and it's jid was shown to be 42, by using something like ~ > rq /path/to/q submit myjob --stdin=myjob.in --- - jid : 42 priority : 0 ... stdin : stdin/42 stdout : stdout/42 stderr : stderr/42 ... command : myjob the stdin file will exists as soon as the job is submitted and the others will exist once the job has begun running. note that these paths are shown relative to the queue. in this case the actual paths would be /path/to/q/stdin/42 /path/to/q/stdout/42 /path/to/q/stderr/42 but, since our queue is nfs mounted the /path/to/q may or may not be the same on every host. thus the path is a relative one. this can make it anoying to view these files, but rq assists here with the ioview command. the ioview command spawns an external editor to view all three files. it's use is quite simple examples : 0) view the stdin/stdout/stderr of job id 42 ~ > rq q ioview 42 by default this will open up all three files in vim. the editor command can be specified using the '--editor' option or the ENV var RQ_EDITOR. the default value is 'vim -R -o' which allows all three files to be opened in a single window. stdin, 0 : dump the stdinput (if any) provided to the job examples : 0) dump the stdin for jid 42 ~ > rq q stdin 42 stdout, 1 : dump the stdoutput (if any) created by the job examples : 0) dump the stdout for jid 42 ~ > rq q stdout 42 stderr, 2 : dump the stderrput (if any) created by the job examples : 0) dump the stderr for jid 42 ~ > rq q stderr 42 stdin4 : show the path used for the stdin of a jid examples : 0) show which file has job 42's stdin ~ > rq q stdin4 42 stdout4 : show the path used for the stdout of a jid examples : 0) show which file has job 42's stdout ~ > rq q stdout4 42 stderr4 : show the path used for the stderr of a jid examples : 0) show which file has job 42's stderr ~ > rq q stderr4 42 recover : it is possible that a hardware failure might corrupt an rq database. this isn't the kind of thing people like hearing, but it's true - hardware has errors. in these situations a database can sometimes be readable, but not writable, or some other combination. this has been reported only a handful of times, nevertheless, this command wraps sqlite recovery to get you rolling again, it's acceptable to perform recovery on a live rq database with active feeders examples : 0) recover! ~ > rq q recover help, h : this message examples : 0) get this message ~> rq q help or ~> rq help NOTES - realize that your job is going to be running on a remote host and this has implications. paths, for example, should be absolute, not relative. specifically the submitted job script must be visible from all hosts currently feeding from a queue as must be the input and output files/directories. - jobs are currently run under the bash shell using the --login option. therefore any settings in your .bashrc will apply - specifically your PATH setting. you should not, however, rely on jobs running with any given environment. - you need to consider __CAREFULLY__ what the ramifications of having multiple instances of your program all potentially running at the same time will be. for instance, it is beyond the scope of rq to ensure multiple instances of a given program will not overwrite each others output files. coordination of programs is left entirely to the user. - the list of finished jobs will grow without bound unless you sometimes delete some (all) of them. the reason for this is that rq cannot know when the user has collected the exit_status of a given job, and so keeps this information in the queue forever until instructed to delete it. if you have collected the exit_status of you job(s) it is not an error to then delete that job from the finished list - the information is kept for your informational purposes only. in a production system it would be normal to periodically save, and then delete, all finished jobs. - know that it is a VERY bad idea to spawn several dozen process all reading/writing huge output files to a single NFS server. use this paradigm instead * copy/move data from global input space to local disk * process data * move data on local disk to global output space this, of course, applies to any nfs processing, not just those jobs submitted to rq the vsftp daemon is an excellent utility to have running on hosts in your cluster so anonymous ftp can be used to get/put data between any two hosts. - know that nfs locking is very, very easy to break with firewalls put in place by overzealous system administrators. be postive not only that nfs locking works, but that lock recovery server/client crash or reboot works as well. http://nfs.sourceforge.net/ is the place to learn about NFS. my experience thus far is that there are ZERO properly configured NFS installations in the world. please test yours. contact me for a simple script which can assist you. beer donations required as payment. ENVIRONMENT RQ_Q: set to the full path of nfs mounted queue the queue argument to all commands may be omitted if, and only if, the environment variable 'RQ_Q' contains the full path to the q. eg. ~ > export RQ_Q=/full/path/to/my/q this feature can save a considerable amount of typing for those weak of wrist. a shell script like this can also be used to avoid needing to type the queue name each and every time ~ > cat my_q #!/bin/sh rq /full/path/to/my/q "$@" and then all operations become, for example ~> my_q submit my_mob ~> my_q status ~> my_q delete 42 RQ_OPTS | RQ_OPTIONS: specify extra options this ENV var can be used to specify options which should always apply, for example ~ > export RQ_OPTS=--restartable and shell script like this might be used to mark jobs submitted by a certain user and to always submit them at a negative priority ~ > cat username_q #!/bin/sh export RQ_OPTS="--tag=username --priority=-42" rq /full/path/to/my/q "$@" actual command line options wil always override options given this way DIAGNOSTICS success : $? == 0 failure : $? != 0 CREDITS - kim baugh : patient tester and design input - jeff safran : the guy can break anything - chris elvidge : boss who made it possible - trond myklebust : tons of help with nfs - jamis buck : for writing the sqlite bindings for ruby - _why : for writing yaml for ruby - matz : for writing ruby AUTHOR ara.t.howard@gmail.com BUGS 0 < bugno && bugno <= 42 reports to ara.t.howard@gmail.com OPTIONS --priority=priority, -p modes : set the job(s) priority - lowest(0) .. highest(n) - (default 0) --tag=tag, -t modes : set the job(s) user data tag --runner=runner modes : set the job(s) required runner(s) --restartable modes : set the job(s) to be restartable on node reboot --stage modes : set the job(s) initial state to be holding (default pending) --infile=infile, -i modes : infile --stdin=[stdin], -s modes : stdin --quiet, -q modes : do not echo submitted jobs, fail silently if another process is already feeding --daemon, -D modes : spawn a daemon --max_feed=max_feed modes : the maximum number of concurrent jobs run --retries=retries modes : specify transaction retries --min_sleep=min_sleep modes : specify min sleep --max_sleep=max_sleep modes : specify max sleep --exit=exit_code_map modes : specify and exit code map --fields=fields, -f limit which fields of output to display --snapshot, -s operate on snapshot of queue --editor=editor, -e editor command capable of opening multiple files at once = (default ENV["RQ_EDITOR"] || "vim -R -o") --verbosity=verbostiy, -v 0|fatal < 1|error < 2|warn < 3|info < 4|debug - (default info) --log=path, -l set log file - (default stderr) --log_age=log_age daily | weekly | monthly - what age will cause log rolling (default nil) --log_size=log_size size in bytes - what size will cause log rolling (default nil) --dot_rq_dir=[dot_rq_dir] base dir for log/pidfile storage (default ~/.rq/full/path/to/queue) --help, -h this message --version show version number