假定文件datafileA大小为MB,则个extent均匀分布到asmdiskA,asmdiskB,同样asmdiskC,asmdiskD也包含该文件的至个extent 即只要有一个extent在故障组fgroup1中存在,必定有一个镜像的extent存在于fgroup2中,反之亦然,两个extent互为镜像。 当一个故障组中的某个磁盘损坏,假定为asmdiskA,则asmdiskA中原来保存的exten...
MIN RM SIZE RO TYPE MOUNTPOINTsda 8:0 0 557.9G 0 disk├─sda1 8:1 0...
crsctl query css votediskocrcheckasmcmd lsdg2.2 ASM元数据备份asm元数据备份ASMCMD > md_backup /tmp/dgbackup20230224---备份全部磁盘元数据 2.3 检查系统网卡参数---系统网卡配置文件HOSTPLUG= "no"未配置HOSTPLUG参数或者HOSTPLUG =YES的情况下,磁盘激活会导致集群服务切换。
az vm create--resource-groupASMOnAzureLab \--nameasmVM \--imageOracle:oracle-database-19-3:oracle-database-19-0904:19.3.1\--sizeStandard_D4_v5 \--generate-ssh-keys\--os-disk-size-gb30\--data-disk-sizes-gb204040\--admin-usernameazureuser \--vnet-nameasmVnet \--subnetasmSubnet1 ...
Disk /dev/sdb: 10.2 GB, 10234101760 bytes 64 heads, 32 sectors/track, 9760 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes ...
当一个故障组中的某个磁盘损坏,假定为asmdiskA,则asmdiskA中原来保存的extent将会从failgroup2中复制到asmdiskB中。 总之,故障组failgroup1和failgroup2必定有相同的extent副本 标准冗余至少需要两个故障组,高度冗余则至少需要个故障组。事实上对于未明确指定故障组的情况下,一个标准冗余至少需要两个 ...
DISK[ NAME disk_name ] [ SIZE size_clause ] [ FORCE | NOFORCE ]...; 4.创建磁盘组 SQL>creatediskgroup DG1 normal redundancydisk'/dev/oracleasm/disks/VOL1'nameVOL1; creatediskgroup DG1 normal redundancydisk'/dev/oracleasm/disks/VOL1'nameVOL1 ...
/sbin/losetup /dev/loop4 /oracle/asmdisk/disk4 /sbin/losetup /dev/loop5 /oracle/asmdisk/disk5 raw /dev/raw/raw1 /dev/loop1 raw /dev/raw/raw2 /dev/loop2 raw /dev/raw/raw3 /dev/loop3 raw /dev/raw/raw4 /dev/loop4 raw /dev/raw/raw5 /dev/loop5 ...
[grid@rolequery~]$ kfod asm_diskstring='/dev/asm-sda9' disk=all --- Disk Size Path User Group === 1: 153605 Mb /dev/asm-sda9 grid asmadmin ---
[grid@snow ~]$ crsctl query crs activeversion Oracle Clusterware active version on the cluster is 11.2.0.1.0 本次/dev/rsm-disk*更名为/dev/asm-disk*。 测试显示系统磁盘名称的变更,grid不需要做任何修改可以正常启动。 1,磁盘更名前: Disk Size Path User Group ...