3ParStoreServ: long queues in defragmentation sheduling task

[Marrex]

Hello, guys! 
I have 3ParStoreServ8400-5CF
CPG Raid 6, 10 SAS drive x 900 GB, Size 8 data 2 parity

CPG have 1 Virtual Drive only. 

My Zabbix server show to long queues (10-40) on a disk connected to the host. 
This coincides in time with running defragmentation tasks that run every 2 hours. 

Can I change the task schedule to run defragmentation at night only?

Thank you and sorry for my english 8-(.

[sbhat09]

Hi @Marrex,

The defragmentation task on server has nothing much to do with 3PAR. Are you referring to 3PAR 'compactcpg' when you say defragmentation?

Anyway, defragmentatio/compactcpg for every 2 hours is too frequent. You can change the schedule to night only. Whenever it runs (every 2 hours or night only) it will compact the same amount of data. So, there will not be much difference in the amount of space it will compact.

Regards,
Srinivas Bhat

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[Marrex]

Thank you, sbhat09!
Defragmentation does not take place on the server. Defragmentation runs on 3par.
showtask command from 3par:

15551 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 13:35:04 xxx 2021-07-19 13:35:55 xxx n/a sys:3parsys
15564 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 15:40:01 xxx 2021-07-19 15:40:52 xxx n/a sys:3parsys
15577 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 17:40:03 xxx 2021-07-19 17:40:54 xxx n/a sys:3parsys
15591 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 19:45:00 xxx 2021-07-19 19:45:51 xxx n/a sys:3parsys
15604 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 21:45:02 xxx 2021-07-19 21:45:56 xxx n/a sys:3parsys
15616 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-19 23:35:04 xxx 2021-07-19 23:40:50 xxx n/a sys:3parsys
15629 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 01:40:01 xxx 2021-07-20 01:41:23 xxx n/a sys:3parsys
15643 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 03:40:03 xxx 2021-07-20 03:40:55 xxx n/a sys:3parsys
15658 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 05:45:00 xxx 2021-07-20 05:45:52 xxx n/a sys:3parsys
15671 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 07:50:02 xxx 2021-07-20 07:50:54 xxx n/a sys:3parsys
15684 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 09:50:04 xxx 2021-07-20 09:50:57 xxx n/a sys:3parsys
15697 defragmentation xxx-ksh-srv-057-SAS done --- --- 2021-07-20 11:55:01 xxx 2021-07-20 11:55:53 xxx n/a sys:3parsys

How i can change sheduler for this task?

[Cali]

To show, use:

showsched -all

To change use:

To change the name of a scheduled task or change when the task is initiated, issue the setsched
-s <new_schedule> -name <new_name> <schedule_name> command, where:
• <new_schedule> is a crontab-style argument that changes when the schedule is initiated.
You can use the minute, hour, day-of-month, month, and day-of-week format, or use one of
the special entries to schedule when the CLI command is initiated.
• <new_name> is new name to be applied to the existing schedule name.
• <schedule_name> is the existing schedule name.

Cali

[Marrex]

Thanks 2 much, Cali!

But i cant see defragmentation task 8-(
3par8400-5CF cli% showsched -all
---------- Schedule ----------
SchedName File/Command Min Hour DOM Month DOW CreatedBy Status Alert NextRunTime
remove_expired_vvs removevv -f -expired -matchbulkobjs 27 * * * * 3parsvc active N 2021-07-20 19:27:00 
move_back_chunklet moverelocpd -f -partial -p -tc_gt 0 17 2 * * 0 3parsvc active N 2021-07-25 02:17:00 
check_cabling check_cabling_script 13,28,43,58 * * * * 3parsvc active N 2021-07-20 18:58:00 
coremanagement coremanman 47 4 * * * 3parsvc active N 2021-07-21 04:47:00 
sample sample 365 37 3 * * * 3parsvc active N 2021-07-21 03:37:00 
checkiperfserver checkstopserver 15 * * * * 3parsvc active N 2021-07-20 19:15:00 

there i can find this task?