DMP configuration help

[Assaf_Leibovitc]

Hello,

I would like to fine tune the DMP configuration in VxVM 5.0, Solaris 10

Our problem is that it takes too long when a fiber cable is disconnected/connected and until DMP disable/enable paths.

Example: 

in OS log file , after connecting the cable again:

Jun 27 10:06:07 csp-124 qla2300: [ID 736385 kern.info] hba0: Fibre Channel Loop is Up (8014)

Veritas enabled the paths only after more than 3 minutes...

Jun 27 10:09:43 csp-124 vxdmp: [ID 736771 kern.notice] NOTICE: VxVM vxdmp V-5-0-148 enabled path 32/0x808 belonging to the dmp
node 289/0x10

Same goes for path disable after cable disconnections.

We are using Qlogic QLA2300 HBA's and drivers.

Thanks

[fengli]

You can update DMP restored daemon with a small value as below(the default is 300 seconds):

vxdmpadm stop restore

vxdmpadm start restore interval=100

vxdmpadm stat restored  can display the interval now.

But    DMP  will use more OS resource with  more  small value.

[Assaf_Leibovitc]

We ended up setting the following:

# vxdmpadm setattr enclosure EMC_CLARiiON0 recoveryoption=timebound iotimeout=10

# vxdmpadm settune dmp_retry_count=2

# vxdmpadm settune dmp_failed_io_threshold=60

Plus qla2300 driver configuration...

Thanks for the reply