Hi, When you are in pooling mode this is the client who initiate de backup. (Immediate client action will not works very fine, it may depend of you query sched period). Each X hours the client contact the server to know when is the next backup. Then it sleep until the right time. When the backup start the server check also is there enough session available, if not client stop and restart few minutes later and so on ...
I used Prompted for Servers (100-150 Srv) Pooling for PC backup (+ Random 08:00AM to 08:00PM) more than 1000. It reduce also the number of message due to PC off that server can not join. Regards, Eric -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Nancy Reeves Sent: Monday, December 22, 2003 4:28 PM To: [EMAIL PROTECTED] Subject: Prompted vs. Polling I'm trying to gather some statistics on how long scheduled backups take and have discovered that things seem to be reported differently for clients that are polling vs. prompted. I understand that with polling, the schedule randomization percentage is used, and with prompted the server contacts all nodes associated with a particular schedule at the same time (within a couple of minutes). A "q ev" gives me this for a prompted node. Scheduled Start: 12/19/03 03:00:00 Actual Start: 12/19/03 04:28:01 Completed: 12/19/03 04:28:04 And the activity log has these messages for that node. So it appears that the Actual Start in the "q ev" is just for the session of writing the stats. 12/19/03 03:00:12 ANR2561I Schedule prompter contacting BXXXXX (session 11625) to start a scheduled operation. 12/19/03 03:00:17 ANR0406I Session 11636 started for node BXXXXX (WinNT) (Tcp/Ip 156.26.xxx.xxx(4710)). ... various 'file in use' messages 12/19/03 04:28:01 ANR0406I Session 11745 started for node BXXXXX (WinNT) (Tcp/Ip 156.26.xxx.xxx(2328)). 12/19/03 04:28:04 ANE4964I (Session: 11745, Node: BXXXXX) Elapsed processing time: 01:27:44 For a polling node, I don't get the ANR2561I message. This example has a 12:00 scheduled start. 12/18/03 12:11:55 ANR0406I Session 10983 started for node RXXXXX (WinNT) (Tcp/Ip 156.26.xxx.xxx(3714)). 12/18/03 12:12:56 ANR0406I Session 10984 started for node RXXXXX (WinNT) (Tcp/Ip 156.26.xxx.xxx(3715)). ... various 'file in use' messages 12/18/03 12:25:16 ANR0403I Session 10984 ended for node RXXXXX (WinNT). 12/18/03 12:25:17 ANE4964I (Session: 10983, Node: RXXXXX) Elapsed processing time: 00:13:20 The "q ev" commands gives an Actual Start time that matches the activity log. Scheduled Start: 12/18/03 12:00:00 Actual Start: 12/18/03 12:11:55 Completed: 12/18/03 12:25:17 My questions for you all are: How do you check stats for scheduled backup durations? What are some reasons for choosing polling vs. prompted? Thanks for the input. Nancy Reeves Technical Support, Wichita State University [EMAIL PROTECTED] 316-978-3860
