Re: 2 SSA boxes for SSA boxes physical redundancy
This is a discussion on Re: 2 SSA boxes for SSA boxes physical redundancy within the AIX Operating System forums, part of the Unix Operating Systems category; --> Dears, I want some quick help from you all guys as customer now want me to respond as soon ...
| |||||||
| FAQ | Members List | Calendar | Search | Today's Posts | Mark Forums Read |
01-04-2008, 06:45 PM
| ||||
| ||||
 Re: 2 SSA boxes for SSA boxes physical redundancy Dears, I want some quick help from you all guys as customer now want me to respond as soon as possible......and i think preobably no one in RISC world has think forever for redundancy over ssa boxes...that's why i did not get any response. SASA sasa1973pk@yahoo.com (sasa queer) wrote in message news:<702930ee.0307030358.2da58c86@posting.google. com>... > Dears, > I have a customer who is so much curious about redundancy matter that > he thinks > that a shared SSA between two RISC nodes is a single point of failure( > inspite of having two hot spare disks). > Now he wants to place another SSA box with same number of disks in the > same ssa loop with existing SSA box.However he is afraid of > performance issues!!!!! > what i suggest that implement two raid5 on two controllers and then do > mirroring on O/S level. > Can anybody help me in predicting performance issues if there!!!! > if yes then what will be other alternatives ???????please guide !!! > > SASA      |
|
01-04-2008, 06:46 PM
| ||||
| ||||
| Re: 2 SSA boxes for SSA boxes physical redundancy Hello, Can your SSA adapters do RAID10 ? If yes, you could think about it. RAID10 should give you reasonably good performance (RAID0) and proteccion (RAID1) Cheers Javier Espinosa j_ammann@yahoo.com (Joerg Ammann) wrote in message news:<a5fbda48.0307082225.7ba8187b@posting.google. com>... > sasa1973pk@yahoo.com (sasa queer) wrote in message news:<702930ee.0307080034.4e3d8d3@posting.google.c om>... > > Dears, > > I want some quick help from you all guys as customer now want me to > > respond as soon as possible......and i think preobably no one in RISC > > world has think forever for redundancy over ssa boxes...that's why i > > did not get any response. > > > > SASA > > > > sasa1973pk@yahoo.com (sasa queer) wrote in message news:<702930ee.0307030358.2da58c86@posting.google. com>... > > > Dears, > > > I have a customer who is so much curious about redundancy matter that > > > he thinks > > > that a shared SSA between two RISC nodes is a single point of failure( > > > inspite of having two hot spare disks). > > > Now he wants to place another SSA box with same number of disks in the > > > same ssa loop with existing SSA box.However he is afraid of > > > performance issues!!!!! > > > what i suggest that implement two raid5 on two controllers and then do > > > mirroring on O/S level. > > > Can anybody help me in predicting performance issues if there!!!! > > > if yes then what will be other alternatives ???????please guide !!! > > > > > > SASA > > our setup is: > - 2 pserver, each with 2 ssa-adapters > - 2 ssa-box > > the loops are: > server1/ssa-adapter1 --- ssa-box1 --- server2/ssa-adapter1 --- > back-to server1 > > server1/ssa-adapter2 --- ssa-box2 --- server2/ssa-adapter2 --- > back-to server1 > > the logical-volumes are mirrorred from ssa-box1 to box2 > > this gives us redundancy for: > - failure of ssa-disk or whole ssa-box > - failure of ssa-adapter > - and (with some manual work, as this is only a poor mans HACAMP) for > failure of server > > theres some more work for the os io-subsytem, because of the > write-doubling, but we never encountered a performance problem. > > joerg |
Linear Mode
