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February 22nd, 2008 07:00

Changing Timefinder Options file

Has anyone changed an options in the Timefinder options file? Specifically, the SYMAPI_DEFAULT_BCV_ESTABLISH_TYPE option. We are seeing a frame performance hit when an establish kicks off. We currently are using the default PARALLEL.

We are just wondering what the ramifications would be to change that to SERIAL.

Thanks.

2 Intern

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2.8K Posts

February 22nd, 2008 12:00

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.

2 Intern

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1.3K Posts

February 29th, 2008 03:00

what is the location of the file? i want to check what is set on my configuration

2 Intern

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2.8K Posts

February 29th, 2008 06:00

/var/symapi/config/ on *nix hosts ...
c:\program files\emc\symapi\config\ on M$ OSes :-)

2 Intern

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1.3K Posts

February 29th, 2008 09:00

looks like most of the cases it is defaulted to parallel including mine.
but SERIAL sounds like not limited to the one est per servicing DA director.
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