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Oracle Database Appliance — Storage expansion with NFS (dNFS, HCC)

Submitted by alexgorbachev on Mon, 2012-03-26 23:16

The biggest objection to Oracle Database Appliance (ODA) we hear from customers is about 4TB usable space limit (tripple mirrored 12TB of raw storage). I think most of the times this is more a perceived barrier rather than objective — more along the lines of being afraid to hit the limit if the system grows [...]

Quick note about Hybrid Columnar Compression running on my laptop

Submitted by pioro on Wed, 2011-10-12 08:27
As I mentioned in previous post Oracle allowed users to use Hybrid Columnar Compression on ZFS appliance. Two days ago there was a note in MOS about bug/enhancement but there was no patch for it. Yesterday I was able to download patch number 13041324 for Oracle 11.2.0.3 and successfully applied it against my installation on virtual machine. After that I run my Oracle's Sun Unified Storage Simulator and I created a new table space on it using NFS share together with Oracle Direct NFS client. Next I try to create compressed table using old existing table space on local ASM disk and it fail as expected.

Exadataを支える技術３ Automatic Storage Management (ASM)

Submitted by Ichiro Obata on Thu, 2011-01-13 08:12

ASM：Shared Diskを実現するためのOracleコンポーネント
OEL：Oracle Enterprose Linux
CELLSRV:Cell Service Databaseとのコミュニケーション
MS:Management Service
RS:Restart Service
IORM:I/O Resource Manager

ASMがあるからOracle RACのShared Disk環境が構築できる。そして従来であれば高価なSANディスクアレイ装置を複数台用意しなければ実現できなかったI/O転送量、バンド幅を実現しているソフトウェア側の立役者的な存在といえる。

ASMと同様なオープンソースにSolaris ZFSがあるが、Oracleを使うのならASMの方がパフォーマンス面で有利。

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