F/C (Active-Active) Interval

[Byun Hee Joong]

I'm doing HA test with two servers and one storage as follows.

Storage - HP MSA2012fc
Server - HP DL380 G5
O/S - Suse Enterprise for 64bit
F/C Card - AE311A (FC Card)

The HA software is Veritas (SFHA 5.0 for Linux) and I'm using specific application.

From the application test, I tested with two f/c lines. First, I disconnected one f/c cable and check the normal status of service and server.

While I was testing this process I knew that, when the first f/c line was disconnected the application service didn't run about 20 sec.
I mean the service and server are o.k. but data didn't save for 20 seconds.

I did it with second f/c line and the result was same.

As I know when I disconnect one of the f/c lines, there is no delay or if there is it's very short time (within 5 sec).

But 20 seconds is too long to run service normally.

Aren't there any parameters to configure the interval of f/c something or do you have any ideas to solve this problem?

Server1:~ # multipath -l
3600c0ff000d7033afdbf614901000000 dm-0 HP,MSA2012fc
[size=102G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=-2][active]
\_ 1:0:1:3 sdh 8:112 [active][undef]
\_ 0:0:0:3 sdd 8:48 [active][undef]
3600c0ff000d7033afcbf614901000000 dm-2 HP,MSA2012fc
[size=102G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=-2][active]
\_ 1:0:1:1 sdf 8:80 [active][undef]
\_ 0:0:0:1 sdb 8:16 [active][undef]
3600c0ff000d7033afbbf614901000000 dm-3 HP,MSA2012fc
[size=102G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=-2][active]
\_ 1:0:1:0 sde 8:64 [active][undef]
\_ 0:0:0:0 sda 8:0 [active][undef]
3600c0ff000d7033afcbf614902000000 dm-1 HP,MSA2012fc
[size=102G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=-2][active]
\_ 1:0:1:2 sdg 8:96 [active][undef]
\_ 0:0:0:2 sdc 8:32 [active][undef]

Thanks in advance.