If you think you have some kind of bottleneck due to a PARALLEL establish, changing to "SERIAL" may also give poorer performances since the list of devices that will be established isn't optimized at all. If you want to reduce the workload (and dilate the time an establish takes) you shoud switch to SINGULAR.
I hope that the following excerpt from Solution Enabler manuals may be of help.
SINGULAR: devices are established one at a time. The next device will not be established until the previous device has been established. SERIAL: devices are passed to the Symmetrix array as fast as they can be accepted. PARALLEL: devices are passed in parallel to the servicing DA directors. SYMAPI ensures that no more than one establish per the servicing DA will be outstanding at any one time.
xe2sdc
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February 22nd, 2008 12:00
I hope that the following excerpt from Solution Enabler manuals may be of help.
SINGULAR: devices are established one at a time. The next device will not be established until the previous device has been established.
SERIAL: devices are passed to the Symmetrix array as fast as they can be accepted.
PARALLEL: devices are passed in parallel to the servicing DA directors. SYMAPI ensures that no more than one establish per the servicing DA will be outstanding at any one time.
SKT2
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February 29th, 2008 03:00
xe2sdc
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February 29th, 2008 06:00
c:\program files\emc\symapi\config\ on M$ OSes
SKT2
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February 29th, 2008 09:00
but SERIAL sounds like not limited to the one est per servicing DA director.