互联网服务emc

EMC DMX3存储分配规则

There are s number of splits (hyper) per physical device.There are n number of cylinders per split (hyper)There are 15 tracks per cylinder (heads)There are either 64 or 128 blocks of 512 bytes per track----------------------------------------------------------------Symmetrix DMX-3/DMX-4 SeriesEnginuity Code: 5771...显示全部
There are s number of splits (hyper) per physical device.

There are n number of cylinders per split (hyper)

There are 15 tracks per cylinder (heads)

There are either 64 or 128 blocks of 512 bytes per track

----------------------------------------------------------------Symmetrix DMX-3/DMX-4 Series

Enginuity Code: 5771, 5772, 5773

Includes EMC Symmetrix DMX-3, DMX-4 and various different configurations within those models.

GB = Cylinders * 15 * 128 * 512 / 1024 / 1024 / 1024

Eg: 65520 Cylinder device equates to 59.97 GB of usable data

65540 * 15 * 128 * 512 / 1024 / 1024 / 1024 = 59.97 GB

Cylinders = GB / 15 / 128 / 512 * 1024 * 1024 * 1024

15 = tracks per cylinder

128 = blocks per track

512 = bytes per block

1024 = conversions of bytes to kb to mb to gb

Symmetrix devices can be created using the create dev command from the EMC Symmetrix Command Line Interface (SYMCLI). The configuration of an LU can be changed using the convert dev command from the SYMCLI. Each physical storage device in an EMC Symmetrix is partitioned into 1 to 128 hyper-volumes (hypers). Each hyper can be up to 16 GB. A Symmetrix device maps to one or more hypers, depending on how it is configured. The following are examples of hyper configurations:

    Hypers can be mirrored (2-way, 3-way, 4-way)
    Hypers can be formed into RAID-S groups

Meta device

Meta device is an EMC term for a concatenated chain of EMC Symmetrix devices. This enables the EMC Symmetrix to provide LUs that are larger than a hyper. Up to 255 hypers can be concatenated to form a single meta device. Meta devices can be created using the form meta and add dev commands from the SYMCLI. This allows an extremely large LU to be created, however, if exported to the SAN Volume Controller, only the first 2 TB is used.

Do not extend or reduce meta devices that are used for managed disks (MDisks). Reconfiguration of a meta device that is used for an MDisk causes unrecoverable data-corruption

通道控制器(Channel Director-CD)

磁盘控制器(Disk Director-DD)
         

DMX-3

磁盘数目
        

96-2400

CPU
        

1.3GHz PowerPC

前端主机连接通道控制器
        

2-12

后端磁盘连接通道控制器
        

2-8

最大 TB (RAID 5)
        

520TB

支持磁盘类型(GB)
        

Fibre Channel: 73(1万转和1万五千转), 146(1万转和1万五千转),300(1万转)

RAID类型
        

RAID1, RAID1+0, RAID 5



1. 首先把每块物理磁盘等分为Hyper volume(常见的等分方式如8分/10分/12分/16分/20分/24分等等,本项目为24分),然后把位于不同磁盘上的Hyper组成Meta volume(常见的Meta有Meta4/Meta8/Meta16,本项目为Meta8),Meta Volume一般均配置为Striped Volume,Stripe Size为2个Cylinder。通过不同的Hyper/Volume组合,可以组成用户所需的Lun尺寸。但不建议在一个阵列中配置多种尺寸的Lun。

2. 通过EMC Binfile制作工具,ID号顺序的Meta Volume一定位于不同的物理磁盘,所以顺序使用会避免出现热点盘。

3. 尽量分配同一容量的LUN,对于同一机器的不同属性的应用(DB/FS),可分配不同容量的LUN;

4. 对于HP需要做MC的双机,分配一个容量为100M的LUN作为锁盘;

5. 对于HP机器,分配偶数个LUN,以利于主机做条带化;

6. 所分配的LUN分布到所有的前端端口(用于SRDF远程复制的端口除外)上,再通过存储管理命令将LUN分配给特定主机的HBA;

7. 为方便HP主机使用,Lun通道地址个位都设为0-7

8. 如果要实现新的DMX-3存储系统和原有的EMC Symmetrix存储系统之间实现SRDF远程数据复制,新的DMX-3存储系统划分的LUN大小必须和原有的存储系统一致。

9. 在主机端认到PV后,将PV与LUN、LUN与Raid Goup之间的对应关系作成表格交予系统管理员,以利于主机做条带化;

10. 根据数据库系统的设计要求,数据空间跟索引空间应该放在不同物理磁盘上,EMC可以提供LUN跟磁盘物理的对应,由用户自己选择。

11. 对于HP需要做MC的双机,分配一个容量为100M的LUN作为锁盘。为了将来扩展方便, 可以考虑预留8-10个锁盘。收起
参与9

查看其它 6 个回答2008010755的回答

20080107552008010755软件开发工程师交通运输部规划研究院

下下来学习,谢谢

互联网服务 · 2018-03-06
浏览1904

回答者

2008010755
软件开发工程师交通运输部规划研究院
擅长领域: 云计算存储服务器

2008010755 最近回答过的问题

回答状态

  • 发布时间:2018-03-06
  • 关注会员:2 人
  • 回答浏览:1904
  • X社区推广