ASM Failure Groups & Redundancy - DG Mirroring - Management (V$ASM_DISK,V$ASM_DISKGROUP,V$ASM_FILE) 

ASM Failure Groups & Redundancy - DG Mirroring - Management (V$ASM_DISK,V$ASM_DISKGROUP,V$ASM_FILE)
Failure Group:
Subset of disks in a disk group dependent on a common
hardware resource whose failure must be tolerated
Note:
ASM won‘t do a hardware check when creating failure groups
From this, we get 3 possibilities for creating FG‘s:
(1) create real FG‘s according to definition (independend hardware)
(2) define FG‘s of your own
(3) use DEFAULT: each disk as a separate FG
Mirroring:
EXTERNAL REDUNDANCY indicates that ASM does not provide any redundancy for the disk group.
With NORMAL REDUNDANCY (the default), a disk group can tolerate the loss of a single failure group without data loss.
HIGH REDUNDANCY provides a greater degree of protection (three-way mirroring).
ASM Management
- V$ASM_DISK
- V$ASM_DISKGROUP
- V$ASM_FILE)
#ASM #FailureGroup #DiskGroupMirroring #Redundancy #ASM_DISK #ASM_DISKGROUP #ASM_FILE #RAC #Oracle #Database #Exadata
Please do follow me and support me on,
LinkedIn: / mallik034
RU-vid: / mallik034
Fakebook: / mallik034
Blog: mallik034.blogspot.com
twitter: / mallik034
Instagram: / mallik034
FBPage: / mallik034oracledba
Skype: malluramadurg
Regards,
Mallikarjun Ramadurg
Mobile: +91 9880616848
WhatsApp: +91 9880616848
Email: malluramadurg@gmail.com
LinkedIn: / mallik034
RU-vid: / mallik034
Fakebook: / mallik034
Blog: mallik034.blogspot.com
twitter: / mallik034
Instagram: / mallik034
FBPage: / mallik034oracledba
Skype: malluramadurg