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SAN, NAS, iSCSI 

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Full access to your data with SAN

In an SAN, all servers have access to all data and the entire available memory. The memory is a separate logical unit, isolated from the servers. Thus, a current free server can make available the data requested by the client from the data storage pool.

Savings potential factor 10

The greatest savings potential is the introduction of TIER storage/memory classes.

Different requirements need different approaches.

In the past, companies either managed to do without any storage system in the IT or decided on a high-end storage system. Driven by the big storage manufacturers (with fear of total data loss) completely oversized systems were sold and installed.

Fiberworks recommends data classification. In the first step, our experts discuss the impact on existing business models. This helps quickly separate the wheat from the chaff, making it clear that fast growing file servers should be considered a different storage class than a SAP system, for example.

However, all data in the SAM is often stored on expensive FiberChannel drives 4X mirrored with high redundant backup.

Assuming an average data growth of 50-80% per year would mean very good news for storage manufacturers and unnecessarily burdens on any IT budget.

Based on your business model and any existing infrastructure, our experts will develop optimized approaches, which can generally be mapped to 3 to 5 tier levels.

The price difference between a high-end storage (TIER 1) and TIER 5 can easily be a factor 1:10!!!. 80% of the data is predominantly to be incorporated in lower TIER classes. An enormous savings potential exists.

 
Interested? – Contact us – Fiberworks is manufacturer independent and has unrivaled knowledge and experience in the area of planning, implementation and operation of complex data centers. We would be happy to offer you performance/profit based consultancy services. If you are not fully satisfied with our consultancy services, then you do not have to pay us!

SAN

A SAN (Storage Area Network) is a separate network between the servers, storage systems and backup systems. Unlike the LAN (Local Area Network), the data traffic via a SAN is mainly to do with the transfer of block-based data. Most SANs today are optically implemented via Fiber Channel. Frequently, redundant SAN switches are used. SAM is a must for high availability and database applications.


 However, cheaper technologies like NAS and iSCSI are increasingly gaining popularity.

NAS - Network attached Storage

NAS (Network attached Storage) offers CIFS and NFS services (primarily file services) directly via the LAN. Just like a file server, NAS storage requires an operating system.

An NAS storage device contains all components in one unit (a so called "All-in-one-Appliance"), which is simply connected to the network to receive additional storage capacities. A typical appliance contains a few hundred gigabytes up to multiple terabytes storage, as well as network interfaces and the associated software, such as its own operating system.

Unlike high-end systems like NAS gateways (which are often difficult to differentiate from SANs), companies can use these storage devices to add additional storage to a network relatively easily and cost effectively.

The biggest advantages are the central management and the omission of all file servers (with the exception of application servers). Besides the cost for hardware and operating system, the redundancy of the host bus adapters, the required SAN ports and backup provide for the greatest savings. Some vendors enable the shared use of SAN disk systems via NAS heads or gateways.

iSCSI – IP based storage networks

More than enough bandwidth for storage networks

Modern LAN/WAN technologies with GBit Ethernet and especially 10-GBit Ethernet offer more than adequate bandwidth to realize storage networks.

For this reason, iSCSI is gaining increasing momentum. The iSCSI protocol allows SCSI commands to be sent via the LAN, similarly to a SAN. This works well as long as the LAN has sufficient bandwidth reserves. More and more applications, even databases, support iSCSI.

This may be a cost-effective alternative for small to medium size applications. Fiberworks, however, strongly recommends implementation of applications critical to the business using the usual SAN technology.

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