Change the time-out for the vote of the files

Hey, is there a way to change the default time-out for files with right to vote. The idea: I have a grid storage (soft). Then I configured the external redundancy for my roc diskgroup where is my votingfile.

When one of the stored mirror gets turned off, the system hungs for almost 2 minutes. The deadline to vote is set to 99 seconds, right? This should be the default setting, at least, according to the journal of crs alerts.

Is it possible to change this value?

At present, the database gets shutdown, after which expires the time-out.

Christian

Hello
This note will help you with the IO time-out, but I think that's not your problem.

See:
Component sync (CSS) of the Oracle Clusterware services maintains two mechanisms of heartbeat heart 1.) the heart rate of the disk on the device with the right to vote and 2.) the heartbeat of the interconnection network which establish and confirm the valid membership of node in the cluster. Both of these mechanisms of heart beat have a timeout associated value. The heartbeat of disc has an interval of time-out of e/s internal (DTO disk time-out), in seconds, to complete an i/o to the drive to vote. The parameter misscount (MC), as noted above, is the maximum time, in seconds, that can not miss a heartbeat of network. The e/s disk heartbeat time-out interval is directly related to the setting of parameter misscount.

Change the default value of misscount not only affects the delay interval to wait for IO to the drive to vote, but also affect the tolerance of pulses missed through the interconnection network.

MissCount should NOT be changed to work around the problems mentioned below.
HBA QLogic cards with a link down Timeout greater than the default misscount.
Cables wrong with Matrix Storage/SAN this purpose IO latencies
SAN switch (such as Brocade) failover latency greater than the default misscount
EMC Clariion array at the intrusion of the AOC for superior to default misscount MS backup
EMC PowerPath path and to repost IO error detection and redirect than default misscount
Bad network configuration SAN that creates latencies in the path of the I/O.

Then I configured the external redundancy for my roc diskgroup where is my votingfile. When one of the stored mirror gets turned off, the system hungs for almost 2 minutes.

As you use external redundancy Oracle knows not that there is a disk mirrored by behind.
Perhaps the OS or storage keep I/O when you stop mirroring due to a bad configuration. I think that this problem is related to the OS or storage not the Oracle Clusterware.
If you perform this test with the diskgroup (external redundancy) storing data will have the same result.

Kind regards
Levi Pereira

Tags: Database

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