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Cache fusion potentially expose your database to many contention problem on resources. Typical contentions are: Read/Read contention – a false problem as a shared storage can be deal this contention without GCS intervention Write/Read contention – solved using consistent read technology Write/Write contention – contention addresses to Cache Fusion technology solved shipping needed block across [...]
Really you need an Oracle RAC database? I’m sure this question maybe a joke, but isn’t it. I’ve seens dozens of RAC database used simply to provide a clustering or a sort of failover and high availabilty service. But this is not true, definitly not. First if you ask for an Oracle database high availabilty [...]
I’ve always thought that ASM is a sucking unneeded part of oracle. Is really slow, is another abstraction layer between database a disk block, is not mature for production environment and simply sucks. Yesterday I made an error. Altering a diskgroup to add a new lun to ASM in a RAC environment cause an error [...]
NO, questa è la mia risposta. Parto da questo concetto: la virtualizzazione e il consolidamento sono utili laddove io posso disporre di un hardware con risorse molto grandi sul quale appoggio una serie di sistemi virtualizzati che di loro non sono memory, CPU, I/O intensive. Infatti di solito si virtualizzano tante piccole cose su blade [...]
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