12-31-2018
Quote:
Originally Posted by
newbie_01
I don't want to change the block size. I just want to be able to run several dbv's instead of one at a time.
I think we (that includes jgt) have understood that. The problem is: verifing the DB creates a certain amount of usage on your disk subsystem because it causes (quite some amount of) disk I/O. if you run several instances of it in parallel it depends on the amount of disk I/O a single instance creates if these several instances run faster linearly with the number of instances.
i.e. if a single instance of the script taxes the disk 10% then running 5 simultaneous instances will drive that up to 50% and run perhaps somewhere in the ballpark of 1/5 of the time. If a single instance taxes the disk already 100% then running 5 instances in parallel will perhaps run about as fast a single instance because you can't tax any resource more than 100%. The disk I/O will be queued (thus serialised again) and this will put a cap at runtime. Perhaps reality is somewhere in between those extremes but you may want to find out beforehand where you stand.
I hope this helps.
bakunin
This User Gave Thanks to bakunin For This Post:
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uudemon(4) Kernel Interfaces Manual uudemon(4)
NAME
uudemon.admin, uudemon.cleanu, uudemon.hour, uudemon.poll - Administrative shell scripts for polling remote systems, cleaning up spool
directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons
SYNOPSIS
These shell scripts reside in the following directory:
/usr/lib/uucp
DESCRIPTION
All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the scripts, remove
the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file.
This script reports status to the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the
results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID (uucpa) or
root. This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com-
mand is run with the following parameters: -C7, -D7, X2, -o2, -W1. This script runs the uusched and uuxqt daemons in the background. This
script polls the systems listed in the /usr/lib/uucp/Poll file. The uudemon.poll script should be scheduled before the uudemon.hour
script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script.
FILES
Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files. Contains the uucp file.
RELATED INFORMATION
Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1)
Files: /usr/lib/uucp delim off
uudemon(4)