2.8. External Storage

2.8.1. Global File Storage Overview

Global File Storage provides Customer using Enterprise Cloud with a shared external Storage area connected using either the CIFS or NFS protocol. This can be used for the Storage of data, which can be accessed by multiple VMs (Virtual Machines).
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Yokohama No.1 Data Center Kansai1 No.1 Data Center Saitama No.1 Data Center San Jose Lundy Data Center Hemel Hempstead2 Data Center


Data Center


Data Center

Global File Storage Primary Storage Yes Yes Yes Yes Yes Yes Yes
Secondary Storage Yes Yes Yes Yes Yes N/A N/A



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Tai Po

Data Center


Data Center


Data Center

Global File Storage Primary Storage Yes Yes Yes Yes
Secondary Storage Yes Yes Yes N/A
Table: Global File Storage Availability Features

NTT Com Group provides Customer the opportunity to choose one of the following plans as detailed below: Storage :

Global File Storage – Primary Storage provides an area to store data in a shared Storage environment and is provided within the same Data Center as Enterprise Cloud (“Primary Data Center”). This Primary Storage may be accessed from the Enterprise Cloud Computing environment through Service Interconnect Gateway.
For example, a VM in the compute layer can mount this Storage using CIFS / NFS to store data.
Global File Storage – Primary Storage can be purchased in 100 GB units, starting from 500 GB. (Minimum is 500GB) Maximum size per volume is 4000 GB. Storage

This option provides a data replication service, allowing Customer to replicate backup data from their “Primary Storage” area to a remote Data Center (“Secondary Storage”).
Global File Storage – Secondary Storage includes Storage in the Local Data Center, Storage in the Remote Data Center, and the standard bandwidth between Primary and Secondary Storage.
Customer may directly mount Remote Data Center store in read-only mode from Compute Resources within the same Data Center.
Standard bandwidth between primary and Secondary Storage is provided using a network connection burstable up to 10 Mbps and is provided on a Best Effort basis.
In addition to the above, NTT Com Group also provides additional options allowing Customer to increase this limit (boost) as necessary: Customer can select one of the burstable options from below when ordering Global File Storage – Secondary Storage, where the default option is “Small”.
Option Standard Bandwidth Rate Increased (Boosted) Rate
Small 10 Mbps 50 Mbps
Medium 10 Mbps 100 Mbps
Large 10 Mbps 500 Mbps
Table : Global File Storage Options

Please note that this boost option is to increase replicating data from Primary Storage to Secondary Storage, not the data transfer between VM and Primary Storage.
Data replication timing between Primary and Secondary may be set by Customer in the Enterprise Cloud Customer Portal. The data transferred are actual snapshots, or the difference between the previous replication.
These snapshot data are stored in Primary Storage (“.snapshot” folder for NFS, “~snapshot” folder in CIFS) and may be used by customer to retrieve data.
Global File Storage – Remote Data Center Store can be purchased in 100 GB units, starting from 500 GB. (Minimum is 500GB) Maximum size per volume is 4000 GB.

Within Primary Storage, there would be a small amount of data used by the system managing Global File Storage. This system data would change based on how much data is used by Customer, and would be inclusive to Customer purchased Storage size.
To use Storage mount function at the Remote Site, Customer is required to prepare VM.
The Storage of the remote site and all the data transferred is read-only. (write on Storage or change of data is unavailable.)
Customer may choose to use either CIFS or NFS per Primary Storage. Customer may not use both CIFS and NFS in a single Primary Storage.
For Remote site, the protocol needs to be the same as Primary Storage.
Protocol that can be used for CIFS would be SMB 1.0 and 2.0.
Protocol that can be used for NFS would be NFS version 3.
(The access control restrictions for primary site and remote site is basically the same.)