Storage Management : Define ( not just the acronym but what it means ) ? OSD CAS

Question

Storage Management :

Define ( not just the acronym but what it means ) ?

OSD

CAS

DataMover

Force Flush

Cache Vaulting

Concatenated Meta

Big Data

Xfat

LVM

Gateway NAS

Questions

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Why is a Write miss bad and a read HIT good?

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What are the 2 cable types for FCOE?

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You have 12 disk of 2 different types of disk .. how many hot spares do you need?

You have 10,000 IOPS    give me the total number of disk needed or Raid 6 disk of at 100% writes

15K 190 IOPS sas

7200k 80 iops Sata

Explanation / Answer

OSD:

1. OSD stands for object storage device.
2. It is a computer storage system
3. It organize data into containers which are called as objects.
4. It allocates space for objects and manage security and lower level space.

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CAS:

1. CAS stands for Content addressed storage
2. It will assign permanent place on disk and provide fast access to fixed content.
3. Retrieval is straight forward.
4. CAS gives a unique name to the object and also specifies the storage location.

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DataMover:

1. It is a SAN attached device.
2. It enables server free backup solution.
3. One of the example is Tivoli storage manager.
4. It transfer data between two SAN devices
5. It gets commands from another device.

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Force Flush:

1. It will empty the storage device forcefully.
2. It Flush storage volumes like file cache etc.
3. By using flush you can also eject the media, dismount and also lock it.

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cache vaulting:

1. Cache is exposed to risk or uncommited data due to power failure.
2. Vault is a save area.
3. It store write cache from the storage processors.
4. When a storage processor failure occurs

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