ASM: determine the total number of bytes read/written & Ops / s

Hello

My environment:

  • Oracle 11.2.0.3 EE
  • SuSE Enterprise Linux 11 SP1, 64-bit
  • ASM starts on RAW LUNS (2 per group) Hitachi disk storage
  • DB-server: HP DL380 G7

I want to disc ASM ssd drive switch, direct attach to via HP DS2700 attachment:

  • DiskGroup + DATA
    5x400GB Enterprise SSD, RAID 5, 1.6 TB of raw capacity
    used to redo, data files
  • DiskGroup + ARCH
    4x400GB Enterprise SSD, RAID0 + 1, capacity of 800GBraw
    used to redo, Archives, Flash Recovery Area

As I understand until this SSD technology, SSD have a livetime, indicating that there is a guaranteed amount of data that can be read/written on this subject. My goal is to design a system that has no point of two ssd failure in the same RAID group.

  1. How can I determine the total number of bytes read/written in ASM starts so far?
    My idea was to dermine ASM block size (select block_size from v$ asm_diskgroup) and then look at total reads and writes columns via iostat command in asmcmd. I guess that these values are since the last start of the DSO.
  2. Is it possible to determine the IOPS / sec per diskgroup?

Thank you
SCSI

Casimir wrote:

Do the calculation for 1. gives me an odd result:

ASMCMD disk group management controls said that the default view is the amount of bytes and that the -io parameter must be used to display the number of e/s instead.

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