SGERAC over ASM

[Ashkan Tasaodi]

Hi,
Is SGERAC over ASM enough reliable ? if we compare it Witout SGERAC

thanks

[Steven E. Protter]

Shalom,

ServiceGuard with RAC is very reliable if configured correctly. It gives you high availability across multple systems. This reduces the number of single points of failure.

Statistically speaking that makes it more relaible than an app running on one system.

Note that newer versions of Oracle RAC have their own clustering system and don't need SG.

SEP

[Peter Godron]

Hi,
and welcome to the forums !

Reliable in what sense ?

These links may help:
docs.hp.com/en/8988/ASM-SGeRAC-tk.pdf

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=968717
which now should link to:
http://www.oracle.com/technology/products/database/asm/pdf/asm_10gr2_bptwp_sept05.pdf

Please also read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33 on how to reward any useful answers given to your questions.

[Ashkan Tasaodi]

hi,
i have two HP 9000 with HP-UX V11.2 and also i want to install Oracle10g R2 RAC ower on these servers ,i have SGERAC ver 11.17 and because SGERAC over ASM in oracle RAC look like New ,I want to know that is this product recommend enogh relible after instalation ? or is better to install Oracle10g RAC withour SGERAC

thanks

[Julio Yamawaki]

Hi,

You can install 10g RAC without SGeRAC, but, in this case, you won't have hardware protection, i.e., no lan cards failover, because 10g RAC doesn't care about hardware.
In speaking about ASM, it is not supported by SGeRAC'toolkit and if you want to configure ASM with SGeRAC, you MUST build your own start/stop script.
It doesn't mean that ASM is not reliable, I have a database of 1,2 TB with ASM and it's has been working for about 2 year without problems. In this case, we didn't use SGeRAC.

Regards,

[Delrish]

ASM stands for Automatic Storage Management. It is a mechanism for storing Oracle Data files. ASM was introduced in 10g edition of Oracle. As soon as using Oracle 10g you do not need to have SGeRAC. You must use Oracle CRS or Oracle clusterware for this issue. In traditional RAC with SGeRAC you had to use SLVM and Raw devices for storing your data. RAW devices are more difficult to manage and administer than ASM.
Personally I prefer to have RAC without SGeRAC. However It is possible and reliable to have SGeRAC and ASM with together.