1. IPSAN (iSCSI) 란? 2. 이퀄로직 스토리지 솔루션 의 혜택 은? 3. IPSAN 의 기술 발전 방향 과 시장 에 미칠 영향 은? 4. 은 사용 성과 성능? 5. 가상화 환경 에서 이퀄로직이 인기인 이유 는?
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Storage networks are predominantly used by organizations to centrally manage their data, reduce hardware costs (the cost of server hardware, software, installation and maintenance) and downtime (while adding additional storage space), management storage resources efficiently and exceed the processing power and scalability problems of storage that storage "independently for each system" approach is concerned. These networks are regularly used to store critical information could affect the compromiseorganization of a competitive edge, cash flow, profitability, legal and regulatory compliance and corporate image.
Storage Area Network (SAN) and Network Attached Storage (NAS) are the two types of storage networks are used in the first place. The two storage networks differ in several respects, however, have been constructed, these two technologies and functionality, not security, and are studded with weaknesses that adversely affect the confidentiality, availability and integrity ofinformation stored within these networks. Serious vulnerabilities in these technologies that may be unauthorized (and in some cases not) authenticated access to stored information. Support for IP-based, iSCSI SAN and NAS-IP connectivity with the accessibility, but also increases the attack surface.
In addition, organizations often third contract third party service provider for the provision and maintenance of storage infrastructure. ManyCases, management of user permissions for the data for the provider of outsourced services. This is the number of employees, organizations can access information and) the places are accessible to which the data (if the outsourcing is the storage infrastructure and can be from any place where the support staff is based access all.
Storage vendors have recently started with the need for security and network storage devices are now bundling featureswhich will help bring SAN and NAS environments, but these features are not configured as the factory settings, and lack of safe storage configuration policies, standards and guidelines for the organization / service provider level, the severe deficiencies in a storage networking.
The storage is a priority for the criticality of the information stored, the plethora of security vulnerabilities in the art and respect for growing andregulatory requirements. The process of secure data storage environment must be very precise with the organizational measures designed storage networks. Secure configuration standards and guidelines should be developed and then implemented in line with suppliers and industry best practices.
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NSS for SAN provisioning system and the file-level recovery SAN iSCSI, Fiber Channel (FC) SAN, VMware Storage & NSS – Disaster recovery, virtualization, thin provisioning storage,, VMware, and easy to use, scalable SAN solution FalconStor meet your business needs.
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What is the best storage solution for small and medium enterprises from unforeseen data growth both privacy and now access to critical files for the users? Of the three most common storage architectures, direct-attached storage (DAS), Network Attached Storage (NAS) and Storage Area Networks (SAN), NAS has been the first choice for most SMEs.
Accessible and easy
NAS provides the accessibility of 10Gb Ethernet with developments, such as SCSI over IP (iSCSI). Moreover, the NASNFS and CIFS to communicate through a Fiber Channel SAN block-level devices for transmitting data over FCP (Fiber Channel Protocol). Almost every IT administration can connect over a LAN or WAN to the data files NAS. With SANs, users will be limited to servers with SCSI connectivity in fiber, while the NAS configurations provide additional information to share files on Windows and Unix.
NAS should be in a network where sufficient bandwidth to support high traffic data generated from a link Volume. NAS is the ideal solution for file-centralization of enterprise users, but for most medium-sized businesses to run disk-intensive applications at the enterprise level and centralized storage environment for their campus wants is a SAN solution.
Here are my top 5 reasons for NAS is the right choice for small and medium
1. Solution cost
Leverage existing investments in Ethernet. 10Gb Ethernet is fast enough for most applications, SMB and media> ISCSI.
Sufficient in-house IT generalists, probably for the management / administration NAS.
2 iSCSI NAS devices can simulate certain SAN-like capabilities
iSCSI is an infrastructure or very low hardware requirements. Normally, an industry standard gigabit network adapter or work 10Gb and turn. These are many NAS devices the ability to act as an iSCSI SAN.
3. Perform advanced tasks
A NAS device to operate at the file level, while a SANoperates at the block level. For users who have access to files, NAS makes sense. Database and application servers require block-level data can be supported with iSCSI SAN solutions, as mentioned above.
It is used depending on the file system, users can perform advanced NAS such as the use of specific tariffs, enforcement of security restrictions, file indexing and other tasks. Your operating system or NAS device, the operating system will allow us to share these filesnetwork.
4. Especially for small and medium enterprises with value-added features built-in.
NAS is designed for the exchange of files to network clients. But most also offer other features such as multi-protocol file sharing, some kind of backup media and tools for the mismanagement of files such as quota and the user community. For most small and medium businesses, is a NAS solution makes perfect sense.
5. Significant roadmap "for growth" for storage
Virtualization: Because NAS appliances designed toserve as network drives, the popularity of virtualization bring their skills to the fore once again. This is because, its much more efficient to use a network drive to store files that the user is in a virtual server. Plus, frequently changing user files tend to degrade performance and complicate the backup to a virtual server. However, obtaining a virtual server partition the users or folders on a map NAS we take care of this situation.
NAS Gateway: Users will no longer face an either / orSituation when deciding to choose the storage technology. NAS gateways are a relatively new type of device, which behave similarly to SAN-attached file server, but with better performance and user management major. Usually a NAS gateway is not in stock, and instead will use your SAN to provide the space intelligently and simultaneously serve the first file on the network. So, if your organization deploy truly demanding server applications such as large databases, e-mailVirtualization of servers and hosts, you can up to a SAN, NAS-devices to use, and more.
For most SMB needs, I recommend the following NAS systems from HP (NYSE: HPQ). Visit www.shopricom.com/AP803A learn more about these products.
Introduction
Mission Critical Data is just what its name says: critical to the core functioning of an enterprise. Mission critical data must be available 24×7 and fully backed up for immediate recovery in the event of disaster. Enterprises are constantly seeking more reliable, more efficient, more convenient and more affordable ways of meeting these needs. SANRAD’s V-Switch 3000 uses Iscsi technology to centrally consolidate, manage, backup and restore mission critical data at a fraction of the cost, in capital and human resources, of existing FC SAN technologies
Mission Critical Requirements and SANRAD’s Solutions
Storage Area Networks (SANs) are used to manage mission critical data and, as they have developed, storage and network administrators have identified three main requirements on a SAN to manage this critical data:
o High Availability: Storage systems and their mission critical data must be available 24×7.
There is no leeway for downtime. Every minute of downtime equals a loss of revenues and credibility for an enterprise.
o Remote Backup and Recovery: Data must be backed up off site to enable remote recovery in the event of disaster. Experts estimate that 30% of companies could not recover from a
catastrophic loss of data and having backups on premises is of no use if the premises are destroyed.
o Manageability: A SAN management system must be able to be centrally managed and provide a consolidated storage solution accommodating different storage subsystems and infrastructures. In addition, the SAN management must not exert added strain on the network and storage administration staff.
o Dynamic Expandability: Storage networks must be able to grow with an enterprise. Systems cannot be taken offline to accommodate this growth and no one wants to search for new storage management solutions every time there is a growth spurt.
SANRAD has taken these requirements and provided comprehensive solutions in a single centrally
managed platform using iSCSI technology.
o SANRAD’s High Availability: The V-Switch 3000 hardware is fully redundant to weather power, processor and fan failures. The V-Switch 3000 configuration database is written to both flash and compact flash memory. The software IP-based SAN configuration provides automatic V-Switch 3000 failover and failback as well as data mirroring. No single point of failure ensures high availability.
o SANRAD’s Remote Backup and Recovery: The V-Switch 3000 can create global IPbased storage networks to allow mission critical data transfer to remote sites within the IP SAN.
o SANRAD’s Manageability: The V-Switch 3000 enables storage pooling across multiple platforms and infrastructures and eliminates the need for host agents. The V-Switch 3000
functions at the network layer and is therefore independent of host OS and storage vendors. The V-Switch 3000 provides storage virtualization and precise LUN carving of the pooled storage,
supporting volume concatenation, mirroring and striping. The locally accessed GUI-based Storage Pro management server is used to centrally configure volumes, monitor status and
manage the storage pool.
o SANRAD’s Dynamic Expandability: The V-Switch 3000 uses existing adapters, network and disk subsystems to form a sophisticated SAN solution ranging from 72 GB to 16 TB. New
storage devices can be added dynamically and their volumes virtualized in real time without taking the system offline or impacting on functioning volume performance. Two V-Switch 3000s
can be combined in a SAN to form a cluster to provide inter-V-Switch 3000 load balancing and failover.
Benefits of iSCSI SAN over FC SAN
When creating a SAN, enterprises find that the traditional answer is FC SAN. However, the investment required to implement an FC SAN is often beyond the means of a young enterprise. As a result, growing enterprises may find themselves delaying the inevitable upgrade to a SAN and, therefore, gambling with
their mission critical data store.
The FC investment comes from four fronts:
o Infrastructure: An FC network demands FC switches, hubs and bridges along with specific
GBICs and cabling. In addition, each host requires dedicated FC HBAs.
o Storage Devices: The storage devices must be costly FC RAID arrays. If an enterprise wants
to maintain its JBOD stores, it must purchase virtualization appliances to convert the JBODs for
use in an FC SAN.
o Software: A variety of software tools is needed to manage all of this new equipment as well as
the dedicated FC HBAs.
o Human Resources: dedicated group of FC storage and networking IT administrators is
needed to manage all of this.
For a growing enterprise, this represents a sizable investment in capital and human resources to acquire,
implement and manage only one aspect of the enterprise’s data flow.
SANRAD’s V-Switch 3000 provides a single integrated hardware/software solution to SAN management:
o Infrastructure: The V-Switch 3000 uses an enterprise’s existing IP infrastructure including
existing Ethernet switches, cabling, GBICs and SFPs. A host’s existing NIC is all that is needed
to connect to the SAN.
o Storage Devices: The V-Switch 3000 supports existing legacy storage devices, both FC &
SCSI, RAID & JBOD, so there is no need to purchase new storage devices. Due to the V-Switch
3000’s storage pooling capabilities, enterprises may have an increase in usable storage space.
o Software: The V-Switch 3000 has both hardware and a software component. There is no need
for additional software beyond the included Storage Pro storage management tool.
o Human Resources: Because the V-Switch 3000 operates over the enterprise’s existing
Internet network, minimal additional knowledge or training is needed to implement or manage the
SAN. The existing network or storage administrator is readily qualified to manage SANRAD’s Iscsi SAN.
Business Case: V-Switch 3000 vs. FC
Typical SAN topographies can be divided into 5 groups according to the number of servers accessing the SAN and the net storage capacity of the SAN.
o Small: 8 servers accessing a net capacity of 500GB.
o Small – Medium: 12 servers accessing a net capacity of 1TB.
o Medium: 16 servers accessing a net capacity of 1.5TB.
o Medium – High: 24 servers accessing a net capacity of 2TB.
o High: 32 servers accessing a net capacity of 3TB.
To best understand the budgetary impact of implementing an FC SAN compared to a SANRAD iSCSI SAN, consider the costs of each for a medium enterprise with sixteen hosts accessing a storage pool of 1.5TB.
In an FC SAN, this would require two FC switches. Upstream of the FC switches there are five server
clusters, including Exchange, SQL and file servers, plus six individual servers. Each server requires FC
software and each server has two HBAs, each connected to a different switch for a total of thirty-two HBAs.
Downstream of the FC switches is a RAID system with RAID 5 and hot spare capabilities and a net capacity
of 1.5TB.
In a SANRAD V-Switch 3000 SAN, this would also require two V-Switch 3000s. Upstream of the V-Switch
3000s there are two multi-Gbit switches but no special host software or HBAs are required. Downstream of
the V-Switch 3000s are the legacy SCSI or FC JBODs with a net mirrored capacity of 1.5TB.
For a medium enterprise, implementing an FC SAN for Mission Critical Data is more than two times as expensive as a SANRAD iSCSI SAN. This expense does not take into consideration the Total Cost of Ownership (TCO), e.g. FC cabling installation costs; cost of human resources to regularly upgrade FC
software and maintain two separate networks or the cost of replacing an FC RAID unit compared to a JBOD
disk. As the size of an enterprise grows, the cost par between FC and iSCSI SAN grows.
Conclusion
SANRAD iSCSI SAN provides all of the key SAN requirements needed to manage, backup and restore
mission critical data with added benefits over FC SAN. SANRAD’s V-Switch 3000 represents a single
integrated hardware/software solution to SAN management, including storage pooling, virtualization,
mirroring, striping and remote backup. The IP-based iSCSI SAN permits remote storage access and
provides greater flexibility in the location of network and storage components within an enterprise and it
does so at a fraction of the cost of an FC SAN.
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You may be ready to implement server virtualisation, but ensuring that each stage of the process is successfully carried out can be easier said than done. This 10 step easy-to-follow guide provides ten expert tips to ensure that server virtualisation is an exercise that is undertaken only once and provides a platform for future application containment.
With the assistance of purpose-built software tools they have engaged consultants to undertake the obligatory capacity planning exercise and armed with that information new hardware has been purchased and the first applications migrated into production. But is that really any way to implement what is truly a paradigm shift in the way applications are delivered to the business? Many organisation’s that have rushed to embrace this technology have found to their cost that further due diligence is required; that the third-party ‘Capacity Planning’ report tell them little more than they already know, certainly not enough to deploy the technology in anger. To ensure server virtualisation is an exercise that is undertaken only once and provides a platform for future application containment, the following 10 tips are provided:
1. Adopt a Strategic Approach
To avoid these pitfalls it is important that organisations take a more strategic approach: align project milestones with the hardware replacement program and proactively plan scalability of the server farm accordingly; scope and define a standard platform; implement a Proof of Concept but replenish the test environment; react to short-term business pressures by implementing tactical requirements strategically.
2. Align with the Business
Aligning with the business therefore means working ‘with the business’, either to overcome these constraints or where this is not possible to recognise them in the design process. It also means ensuring that the organisation’s business strategy and project success criteria form part of the design process:
o What targets for cost savings has it set?
o Does it have intentions to move to a 24 x 7 operation?
o Is the organisation looking to improve its Disaster Recovery capabilities or perhaps intent on implementing a ‘charge-back’ model?
o What Service Levels has the business associated with the applications that are to be virtualised and how can this be achieved?
3. Consider the Underlying infrastructure
A number of questions concerning the underlying infrastructure needs to be considered:
o What are the additional storage requirements?
o Is a Storage Area Network required: – fibre channel or ISCSI?
o How will the storage be presented: CIFS, NFS, Lun or raw device?
o What are the implications for: backup/recovery, business continuity, local & wide area networking?
o How will the training budget be affected?
4. Design a Platform for Growth
To realise these objectives, break the cycle of purchasing hardware to fulfil short-term tactical requirements and lay the basis for utility-based capacity-on-demand, organisations should resist the temptation of only provisioning sufficient capacity to meet short-term needs. Instead they should provide a ‘platform for growth’ – a platform that is scalable – with sufficient capacity to meet longer term needs and that can react quickly to the changing demands of the business.
5. Rationalise your Application Set
Having undertaken a capacity planning exercise the software inventory that generally accompanies it is typically overlooked in a rush to scope the server farm. However unless the organisation already has this information it is a good idea to review the inventory as a pre-requisite to defining a set of standard operating system builds and reducing both the set of applications / versions the organisation is supporting
6. Use Migration Tools with Discernment
In migrating applications to a virtual state, resist the temptation to jump in and make indiscriminate use of Physical-Virtual (P-V) migration tools, which may speed application deployment, but migrate with it a lifetime of patches, fixes and unknown registry changes – ‘rubbish in equals rubbish out’.
7. Understand the impact on Operations
The operational management of the new environment is another area that can typically get overlooked, surprisingly when the loss of an individual server has significantly greater potential business impact. A number of questions need to be addressed:
o How will the new environment be managed; what will be the impact on people and processes; will it fit within the existing management framework or will additional management tools be required?
o How will applications be protected; what service level agreements have been defined?
o What are the backup/recovery options and what disaster recovery plans are required?
o How will new applications be deployed and growth of the environment managed?
o What are the security implications; where are the risks?
o What additional skills / training will be required?
8. Security, Security, Security!
Security as always should be an area of particular consideration during the design and planning process; Virtual Servers and guest operating systems need to be secured like any other operating system.
9. Review the Options
Microsoft and VMware are clear leaders in this space with many subtle, and not so subtle, differences in their features and overall product set. Similar product offerings are also available from a group of smaller companies such as VirtualIron; XenSource and SWsoft. Organisations looking to adopt server virtualisation technology should make themselves aware of the various merits of each vendor before making their platform decision.
10. Engage with a Partner
In order to ensure consolidation is an exercise that is undertaken only once and provides a platform for future application containment, organisations should engage with a partner who will take the time not only to undertake a capacity based assessment of their server estate, but will understand their complete environment
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Introduction
Many Microsoft Window applications (like Exchange, MS-SQL, etc) are critical to the daily core functionality for many companies and organizations. Managing the data backup for these applications presents new challenges for system administrators. While there is an ever increasing need for more and more data to be backed up, at the same time the system administrator must cope with the issue of shrinking backup windows in which the application can be taken offline in order to backup the application data. Another issue to contend with is the performance hit the production server takes when backup is running.
Microsoft Volume Shadow Copy Service (VSS) and SANRAD iSCSI V-Switch acting as VSS storage provider can help the system administrator resolve these issues by:
o Eliminating the need to take the application offline.
o Quickly responding to the increasing need for storage.
o Enabling fast backup and restore by backing up to disks and offloading the backup performance hit from the production volumes and servers.
This application note describes VSS, how it works, the required basic configuration in order for VSS to work with the SANRAD V-Switch to create snapshots as well as the backup design options using VSS and SANRAD V-Switch. We use Veritas’ BackupExec (V10.0) to help us demonstrate taking backups with VSS using SANRAD V-Switch.
This application note assumes that the user has basic knowledge of how to use SANRAD V-Switch to configure volumes and expose them to the servers as disks. The user should also be familiar with Microsoft Iscsi initiator for connecting Windows 2003 server to the exposed iSCSI volumes by the SANRAD V-Switch.
What is VSS?
Microsoft Volume Shadow Copy Service (VSS) provides the backup infrastructure for the Windows Server 2003 operating systems, as well as a mechanism for creating consistent point-in-time copies of data known as shadow copies or snapshots.
VSS can produce consistent snapshots by coordinating between different applications (business, file-system services, backup) and storage hardware.
The following steps describe VSS Architecture:
STEP 1. Path 1: The Requestor (usually a backup application) make a request to VSS (running on the application server) to create snapshots of production volumes so that backups can be made from the snapshots and not from the production volumes.
STEP 2. Path 2: If the volumes “belong” to an application that has a VSS Writer (VSS aware application like Exchange), the VSS requests the Writer to prepare the volumes. The Writer will usually flash the data to the disk and freeze IO writes from the application during the time the VSS takes the snapshots (usually few seconds). This ensures application data consistency when recovery is needed. If there is no VSS writer then VSS will go directly to the next step but there is no guarantee that the data is in a consistent state.
STEP 3. Path 3: VSS requests a provider to create a snapshot. There are three kinds of VSS providers: Hardware, Software and System. A system provider is part of the Windows 2003 OS and it will take snapshots and keep them but only at the OS level. A hardware provider is usually a storage provider, like SANRAD Iscsi V-Switch, which creates and maintains snapshots at the storage hardware level. VSS chooses the provider from a list (first on the list with priority given to hardware provider if one exists).
STEP 4. Path 4: VSS goes back to the VSS Writer (if it exists) and allows it to unfreeze the application I/O activity and resume normal activity.
STEP 5. Path 5: VSS goes back to the requestor (backup application) and gives it the location of the snapshots so it can start the backup from the snapshots.
STEP 6. Path 6: Once backup is complete, the requestor informs VSS which in turn informs the VSS provider to delete the snapshots.
Summary
The combined solution of Microsoft Volume Shadow Copy Service (VSS), SANRAD V-Switch as the VSS storage provider and backup VSS aware applications (like Veritas BackupExec V10) allow companies to offload backup jobs from the production environment, leave applications up for user access while backing up the data and have a data life cycle for regulations compliance.
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