Hi,
I'm trying to figure out how difficult is this
What we need:
- a shared catalog
- an API for filling the catalog
- a scheduler daemon
- pg_dump support
A shared catalog
-------------------------
Why shared? obviously because we don't want to scan all database's
pg_job every time the daemon wake up.
Maybe something like:
pg_job ( oid -- use the oid as pk jobname jobdatoid -- job database oid jobowner --
forpermission's checking jobstarttime -- year to minute jobfrequency -- an interval? jobnexttime or
joblasttime jobtype -- if we are going to allow plain sql or
executable/shell job types jobexecute or jobscript
)
comments about the catalog?
An API for filling the catalog
-----------------------------------------
do we want a CREATE JOB SQL synatx? FWIW, Oracle uses functions to
create/remove jobs.
An scheduler daemon
--------------------------------
I think we can use 8.3's autovacuum daemon as a reference for this...
AFAIK, it's a child of postmaster that sleep for $naptime and then
looks for something to do (it also looks in a
catalog) and the send a worker to do it
that's what we need to do but...
for the $naptime i think we can autoconfigure it, when we execute a
job look for the next job in queue and sleep
until we are going to reach the time to execute it
i don't think we need a max_worker parameter, it should launch as many
workers as it needs
pg_dump support
--------------------------
dump every entry of the pg_job catalog as a CREATE JOB SQL statement
or a create_job() function depending
on what we decided
ideas? comments?
--
Atentamente,
Jaime Casanova
Soporte y capacitación de PostgreSQL
Asesoría y desarrollo de sistemas
Guayaquil - Ecuador
Cel. +59387171157
