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Full Discussion: How to convert this script so that it runs the dbv at most 5x at a time instead of serially?
Top Forums Shell Programming and Scripting How to convert this script so that it runs the dbv at most 5x at a time instead of serially? Post 303028147 by bakunin on Monday 31st of December 2018 08:37:12 PM
Old 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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LEARN ABOUT SUNOS

list-instances

asadmin-list-instances(1AS)					   User Commands				       asadmin-list-instances(1AS)

NAME

       asadmin-list-instances, list-instances - lists all the instances in the server

SYNOPSIS

       list-instances  [--user	admin_user]  [--password  admin_password]  [--host localhost] [--port 4848] [--domain domain_name] [--local=false]
       [--passwordfile filename] [--secure|-s]

       Use the list-instances to list all the instance in the server. The list-instances command can be run both locally and  remotely.   To  list
       remote  instances,  the named administration server must be running on the hostname and port number specified. The user authenticates using
       the password identified for the administration server.

OPTIONS

       --user		       administrative user associated for the instanace.

       --password	       administrative password corresponding to the administrative user.

       --host		       host name of the machine hosting the administrative instance.

       --port		       port number associated with the administrative host.

       --domain 	       name of the domain.

       --local		       determines if the command should delegate the request to administrative instance or run locally.

       --passwordfile	       file containing passwords appropriate for the command (e.g., administrative instance).

       --secure 	       if true, uses SSL/TLS to communicate with the administrative instance.

       Example 1: Using list-instances in local mode

       asadmin> list-instances --domain1 --local
       admin-server running
       server1 running

       Where: the server1 and admin-server instances for the domain1 domain is listed.

       Example 2: Using list-instances in remote mode

       asadmin> list-instances --user admin --passwordfile passwords.txt --host localhost --port 4848
       server1 [mayank:80] running

       Where: the server1 instance associated with the specified user, passwords, host, and  port  number  specified  is  listed  for  the  remote
       machine.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

INTERFACE EQUIVALENT

       Server Instance page

       asadmin-show-instance-status(1AS)

J2EE 1.4 SDK							    March 2004					       asadmin-list-instances(1AS)
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