AIX

Hi,

I got an advise from an old colleague that it's not recommended to have a two fiber for performance purposes on aix. Only use it for redundancy or rdac.

Is that true? I was thinking to divide the use of two fiber with the 8 vg so I each one would have 4 vg to serve.

Is there anyone of you already use this kind of configuration?

Thanks in advance,
itik

Depends on the storage and drivers.

If you have FastT then use both adapters and configure half the disks to each dac as a preferred path to split the load - just as you suggest.

I'm sure I heard recently that some of the higher end FastT can, or will soon, support MPIO.

SDD / SDDPCM already supports MPIO as do most third party SAN devices, with the right drivers and config.

Hi

Well i don't think having two HBA with the correspondent software to do load balancing as well as failover is a bad thing. In fact is one of the best practices you can use to set a very secure and fast system.

it's all about the storage subsystem you have. IBM FastT (or DS4x) line has the RDAC driver that's not help too much in load balancing (you do the load balancing at Storage Manager level) but does a good job in failover. IBM DS8x series uses SDD (and SDDPCM) and they do load balancing and failover. SDD comes from the old days of the Shark systems and works ok.

EMC2 uses Powerpath, a very mature SW. HP uses AutoPath, not a very good SW.

Hope this helps

Hi guys,


I have problems with rebooting HP-UX 11.3 when powerpath is installed. Do you guys think there is a compatibility problem?

thanks

kindly cc gturno.c@stc.com.sa

it's better you create a new post for this.