Storage

STORAGE

 

Models of storage used by Arka Service are aligned with current market standards, combining the right balance accessibility, security and cost, to meet the different needs of the Enterprise market place arena. To ensure this, Arka Service collaborates with major players in the market for engineering complex and storage environments such as Primary storage, secondary storage, Tertiary storage, offline storage, etc
  • STORAGE MEDIA independently from the repository model used, data must be saved on a support (data storage media). Arka Service uses the most common methods used as market standard such as:
    • MAGNETIC STRIP is the most widely used for mass storage archiving, backup, and interchange. Generally speaking magneticstrips has had a better capacity/price ratio compared to a hard drive, but recent developments have considerably reduced this.
    • HARD DISK have a capacity/price ratio which has improved, allowing it to become more competitive with magnetic strips inregards to mass storage archiving. The main advantages of this solution are the reduced access time, availability, capacity andease of use. External drives can be connected through local interfaces like SCSI,USB, FireWire, eSATAo, or though long distance technologies such as Ethernet, ISCSI, and fibre Channel. Some disk based backup systems, like virtual tape libraries, allow data deduplication considerably reducing storage quality ac capacity.
    • OPTICAL STORAGE are optic disks, most of which WORM type (write once read many) particularly useful for data archiving purposes since the contained data cannot be changed. The use of auto-changer or jukebox makes optic disk a feasible option for large scale backup systems. Some optical storage systems allow the backup of data without any human interaction, allowing an increased integrity of data.
    • SOLID STATE STORAGE better known as flash memory, these devices are relatively expensive due to their low capacity when compared to hard drives, but they are extremely convenient for the backup of relatively small data.
    • REMOTE BACK UP SERVICES are gaining in popularity thanks to the spread of broad band internet access. Internet backup is undoubtedly useful to protect data from worse case scenarios, like fires, floods or earthquakes.
  • MANAGING DATA REPOSITORY independently from the data repository model or memorisation support used to backup; equilibrium must be achieved between accessibility, security and cost. These methods of managing media do not exclude one anotherand are often combined to satisfy user requirements. A common example of is this is using online disks for temporary management ofdata before they get sent to a near-line tape library.
    Arka Service is able to adopt Back Up solutions combining different client necessities:

    • ON LINE BACK UP is generally the most accessible type of memorised data, capable of restoring data within milliseconds. A good example is a hard disk within an array of disks (commonly connected to a SAN).This type of storage is extremely convenientand fast!
    • NEAR LINE BACK is generally the less accessible but cheaper than Online Back up, but still effective for data archiving. A good example could be a tape library with restore times that range from a few seconds to a minute.
    • OFF LINE BACK up requires human interaction in order to access the memorisation support: for example inserting a new tape ina tape unit or connecting a cable. Since data is not accessible through any computer, exceptions made for limited periods duringwhich they are being written/read, they are mostly immune to a whole array of breaks compared to online back up. Access time can vary depending if the location is on-site or off-site.
    • OFF SITE DATA protection is typically used to protect data from possible disasters that could involve a site. In most cases the choice is done by sending the backup to a different location, may it be another office or a sophisticated site built to face disaster situations. The replication of data can be done on site or off site.
    • BACK UP SITE in case of disaster; could not be sufficient in order to recover data, this is due to the fact that IT systems to host the restored data and correctly configured networks are required. Some organizations have their Disaster Recovery centres equipped to face these scenarios. Other organizations prefer to have a third party Disaster Recovery centre due to the considerable investments costs of building a DR site.
  • COMPUTER DATA STORAGE is a technology that is composed by memorisation supports for digital conservation. This is a fundamental function and component of Information Technology architecture. Data Storage has developed concepts and heterogeneous architectures over the course of years and Arka Service has embarked in the challenge of developing skill and expertise required in order to create, install and manage multiplatform storage environments.
    Arka Service collaborates with the major market leaders (IBM,EMC,HP,DELL, etc…) for the creation of storage environments and architectures( Primary storage, secondary storage, Tertiary storage, off line storage, etc…)
  • STORAGE AREA NETOWORK is a network or part of a network with high velocity transmissions constituted exclusively by mass storage devices, in some cases of different type and technology. The objective is to render storage resources available in any computer(generally application servers and DBMS servers) connected to them.
    The most common protocols currently in use to communicate within a SAN, are FC(Fibre Channel) and iSCSI (Internet SCSI).
    In a SAN network storage peripherals are connected to servers through a topology, constituted essentially by connections – usually fibre optic – and hubs, bridges, switches and routers that in theory allow coexistence of systems and storage devices of heterogeneous nature. This prevents a network overload since the whole generated traffic is managed from these devices.
    Arka Service is able to build and manage SAN architectures making them available so that all storage devices are accessible from any server on the LAN or MAN network on which the SAN is hosted. The advantage of this architecture isthat all the Server processing power is used for applications, since data is not directly located on any of them , but on the SAN network.
  • NETWORK ATTACHED STORAGE is intended as a device connected to a network of computers whose role is to share between users on the network mass storage, this is made up of one or more hard drives. Generally NAS are computers equipped with all thenecessary means to communicate on the network. These devices are usually running operating systems based on Linux (generally speaking this is not apparent to end users) and over hard disks intended to store data. This architecture has the advantage ofrendering files contemporarily available on multiple platforms, for example Linux, Windows and Unix (or Max OS X), where theoperating system implements network servers with the more common standards such as FTP, Network File System (NFS), Samba forWindows networks and AFP for MAC OS X networks.
    Arka Service offers competencies for the fulfilment and management of NAS architecture, allowing to centralise data storage in a unique device accessible on all network nodes, highly specialised in efficiency; this system allows the implementation of RAID(Redundant Array of Independent Disks), which guarantee a better management of secure data. Normally a NAS allows contingent removal and addition of disks through hot swap, without requiring to deactivate the unit.