NAS is based on Ethereum
Publish: 2021-04-27 09:11:28
1.
NAS is defined as a special data storage server, including storage devices (such as disk array, CD / DVD drive, tape drive or removable storage media) and embedded system software, which can provide cross platform file sharing function
Its functions include:1, storage and backup. At present, most of the home NAS systems on the market have the function of automatic backup, and some manufacturers even develop PC clients with automatic backup
2, resource sharing and collaborative work
in today's increasingly developed science and technology, there are too many ways of resource sharing, mobile hard disk, network disk, U disk and even QQ software can share resources. But they are far less convenient than NAS
3. Free offline download
can provide private offline download service
4. Other additional functions:
for example, the private VPN and private cloud (Qunhui NAS) mentioned in the above answer also provide mobile client support! Great Remote monitoring, web server, printer server and so on, these small servers can achieve the basic functions of NAS. NAS also supports basic functions such as multi-user login and privilege management
expand data:
NAS (Network Attached Storage) is literally a device connected to the network with data storage function, so it is also called "network storage"
it is a special data storage server. It takes the data as the center, completely separates the storage device from the server, centralizes the management of the data, so as to release the bandwidth, improve the performance, rece the total cost of ownership, and protect the investment. Its cost is much lower than using server storage, but its efficiency is much higher than the latter. At present, the world famous NAS enterprises include NetApp, EMC, Ouo, etc
2. Unknown_Error
3. It is usually developed by Linux
4. The integrated design of AFL file system and integrated raid solves the inherent performance problem of file system with RAID management mechanism
WAFL file system can control raid mechanism more effectively; It can ensure the dynamic growth of the file system when adding new disks; It can avoid the time-consuming consistency checking of the host's file system
WAFL is a UNIX compatible file system and optimized for network file access< The similarities between WAFL file system and UNIX file system are as follows:
1. WAFL is based on data block and uses 4KB data block without fragment< WAFL uses inode to describe its files
3. In WAFL file system
WAFL file system can control raid mechanism more effectively; It can ensure the dynamic growth of the file system when adding new disks; It can avoid the time-consuming consistency checking of the host's file system
WAFL is a UNIX compatible file system and optimized for network file access< The similarities between WAFL file system and UNIX file system are as follows:
1. WAFL is based on data block and uses 4KB data block without fragment< WAFL uses inode to describe its files
3. In WAFL file system
5. No, it is
6. NAS is a storage device<
generally, embedded operating system, such as VxWorks / Linux, and some windows CE are used.
NAS (Network Attached Storage) is a device with data storage function connected to the network, so it is also called "network memory". It is a special data storage server. It takes the data as the center, completely separates the storage device from the server, centralizes the management of the data, so as to release the bandwidth, improve the performance, rece the total cost of ownership, and protect the investment. Its cost is much lower than using server storage, but its efficiency is much higher than the latter
NAS is defined as a special data storage server, including storage devices (such as disk array, CD / DVD drive, tape drive or removable storage media) and embedded system software, which can provide cross platform file sharing function. NAS usually occupies its own node on a LAN, and allows users to access data on the network without the intervention of application server. In this configuration, NAS centrally manages and processes all data on the network, unloads the load from application or enterprise server, effectively reces the total cost of ownership and protects users' investment
Airbus data recovery center provides
NAS itself can support a variety of protocols (such as NFS, CIFS, FTP, HTTP, etc.) and various operating systems. Through any workstation, using IE or Netscape browser, NAS devices can be managed intuitively and conveniently
the difference between San and NAS:
San is a kind of network, and NAS proct is a proprietary file server or a read-only file access device
San is a private network used as I / O path between server and storage
San includes block oriented (iSCSI) and file oriented (NAS) storage procts
NAS procts can be connected to storage devices through San
appearance of NAS
NAS is a simple computer with single function, so its architecture is not as complex as that of personal computer, such as keyboard, mouse, screen, sound card, loudspeaker, expansion tank, various connection ports, etc; In appearance, it's just like a home appliance. It only needs power supply and simple control button. NAS is similar to PC in architecture, but because of its simple function, it can remove many unnecessary connectors, control chips and electronic circuits, such as keyboard, mouse, USB, VGA, etc
advantages and disadvantages of storage
advantages:
NAS procts are truly plug and play procts. NAS devices generally support multi computer platforms, and users can access the same documents through network support protocol, so NAS devices can be used in mixed UNIX / Windows NT LAN without modification
the physical location of NAS devices is also flexible. They can be placed in the working group, close to the application server in the data center, or in other places, and connected to the network through physical links. Without the intervention of the application server, NAS devices allow users to access data on the network, which can not only rece the CPU overhead, but also significantly improve the performance of the network
limitations:
NAS does not solve a key problem related to file servers, that is, bandwidth consumption ring backup. Unlike storage area network (SAN), which transfers backup data stream from LAN, NAS still uses network for backup and recovery. One disadvantage of NAS is that it transfers storage transactions from parallel SCSI connections to the network. That is to say, LAN must handle not only the normal end-user transport stream, but also the storage disk request including backup operation
because the stored data is transmitted through the ordinary data network, it is easily affected by other traffic on the network. When there are other big data traffic on the network, it will seriously affect the system performance; Because the stored data is transmitted through the common data network, it is easy to cause data leakage and other security problems
storage can only be accessed in the form of files, but not directly access physical data blocks like ordinary file systems, which will seriously affect the efficiency of the system in some cases, such as large databases can not use NAS
work classification
1. Electrical server
Electrical server is the lowest end proct in NAS series equipment. The electrical server is not a special additional storage device. They provide a storage location for the network, but because there are no rendant and high-performance components, they are relatively cheap. In the working group environment, electrical server plays a lot of roles. Typical services include network address translation (NAT), proxy, DHCP, e-mail, web server, DNS, firewall and VPN
2. Working group NAS
working group level NAS is especially suitable for small and medium-sized companies with relatively low storage requirements, whose storage requirements generally range from several hundred GB to 1TB. Companies running e-commerce software or large databases will need several terabytes of storage space. They use medium-sized NAS. Generally speaking, when upgrading from a workgroup to a medium-sized NAS, you'll find hot swap drives and some device boxes that can accommodate additional drives or more recovery procts, enhanced management capabilities, and a slight increase in system complexity
3. Medium sized NAS
what we call medium-sized NAS solution provides better scalability and reliability, and has similar advantages as low-end NAS, such as convenient, dedicated storage space and simple installation and management process. Compared with electrical server and team level NAS, the cost of these NAS devices is much higher
4. The scalability, high availability and rendancy of large NAS storage devices are very important. These devices must also provide high-end server performance, flexible management and the ability to interact with heterogeneous network platforms< Office automation (OA) is the focus of government and enterprise information construction. The management and operation of modern enterprises and institutions are inseparable from the computer and LAN. When enterprises use the network for daily office management and operation, they will proce daily office documents, drawing documents, ERP and many other business data of enterprises and personal documents. There is generally no file server in the traditional internal LAN, and the above data are generally stored in the staff's computer and server, without a suitable device as its backup and storage application. Due to the low security level of personal computers and the uneven security awareness of employees, important information is easy to be stolen, maliciously damaged or lost e to hard disk failure
from the analysis of data storage in enterprises and institutions, it can be seen that in order to make the internal data of the whole enterprise and institution unified management and secure application, there must be a safe, cost-effective, convenient and simple physical medium to store and back up the internal data of the enterprise. NAS network storage server is a specially designed file storage and backup server, which can manage the data in the network reasonably, effectively and safely, and can automatically back up the database and other application data to NAS as a backup device
2. Tax NAS solutions
the tax instry needs a comprehensive system integrating business, information and decision support. Instry business system is mainly tax collection and management information system, as well as tax business information, general business information and so on. The whole system combines administrative office information, assistant decision-making information and business system to form a general integrated system platform, so as to form a complete, integrated and integrated tax business management system
the business data, daily office documents and data e-mail system of the tax instry are very important. Once the data is lost, it will bring trouble to the daily work and the tax work of the whole region. To ensure the safe operation and application of the whole data has become a practical problem that must be solved in the tax instry. The solution to this problem is to store or back up these data to a safe, fast and convenient application environment, so as to ensure the safe operation of tax instry data
in order to reasonably solve the problem of data business data backup and storage, a NAS network storage server can be used to store and backup business data and daily office data. In the business host, the information in the database is directly backed up to NAS through the incremental data backup function. Together with the business information inside the LAN and the daily office documents or CD-ROM based data of the staff, they can be stored on the NAS server, so that the staff can use and browse these data at any time. After using NAS, the administrator can arrange and manage the internal data effectively and reasonably, separate the data files from other network machines, realize the decentralized storage of data and manage the data environment system uniformly
3. Advertising NAS solutions
advertising design instry is a comprehensive service instry integrating market research, marketing strategy, creative proction, design execution, post proction and media release
the data storage mode of many advertising companies is relatively backward, with high cost and low efficiency. The main problem is poor data security; It is difficult to store and manage a large amount of old data; There are multiple operating system platforms and complex devices, which make it difficult to share and manage the stored data, resulting in low efficiency; The resignation of advertising designers results in the loss of design materials. NAS is used to store and back up the business data in the network of advertising design instry, so as to realize the centralized storage, backup, analysis and sharing of data. According to the different requirements of design and research units for different data, the existing data is fully utilized, and the data storage platform of advertising design instry is reasonably constructed, so as to improve the transmission speed of information and save time, It improves the work efficiency
4. Ecation NAS solution
since the "school to school" project was proposed, all schools are actively building their own campus network, so that they can adapt to the development of the information age in time in the future. With the "school to school" project graally in place, "resource to school" has become the focus of the next step of information construction, specifically reflected in the school needs a lot of resource information to meet the needs of students and teachers. With the continuous increase of data resources in campus, the physical medium that needs to store data has a large capacity of storage space and security, and has a very fast transmission rate to ensure the safe and fast access of the whole data
in the process of campus network construction, emphasis is laid on the construction of network system, and a large number of advanced equipment are equipped on the network, but the teaching application resources on the network are relatively scarce. The original storage mode will show many disadvantages when increasing teaching resources: because all the ecation resources in the traditional network application are stored on one server, the cost of the server with high performance and high expansion ability is high; Access to teaching resources and application services will compete for system resources, resulting in a substantial decline in the efficiency of system services; The system failure of application server will directly affect the security and availability of resource data, and bring inconvenience to the teaching work of the school
to solve these problems, NAS devices can be introced to realize centralized storage
generally, embedded operating system, such as VxWorks / Linux, and some windows CE are used.
NAS (Network Attached Storage) is a device with data storage function connected to the network, so it is also called "network memory". It is a special data storage server. It takes the data as the center, completely separates the storage device from the server, centralizes the management of the data, so as to release the bandwidth, improve the performance, rece the total cost of ownership, and protect the investment. Its cost is much lower than using server storage, but its efficiency is much higher than the latter
NAS is defined as a special data storage server, including storage devices (such as disk array, CD / DVD drive, tape drive or removable storage media) and embedded system software, which can provide cross platform file sharing function. NAS usually occupies its own node on a LAN, and allows users to access data on the network without the intervention of application server. In this configuration, NAS centrally manages and processes all data on the network, unloads the load from application or enterprise server, effectively reces the total cost of ownership and protects users' investment
Airbus data recovery center provides
NAS itself can support a variety of protocols (such as NFS, CIFS, FTP, HTTP, etc.) and various operating systems. Through any workstation, using IE or Netscape browser, NAS devices can be managed intuitively and conveniently
the difference between San and NAS:
San is a kind of network, and NAS proct is a proprietary file server or a read-only file access device
San is a private network used as I / O path between server and storage
San includes block oriented (iSCSI) and file oriented (NAS) storage procts
NAS procts can be connected to storage devices through San
appearance of NAS
NAS is a simple computer with single function, so its architecture is not as complex as that of personal computer, such as keyboard, mouse, screen, sound card, loudspeaker, expansion tank, various connection ports, etc; In appearance, it's just like a home appliance. It only needs power supply and simple control button. NAS is similar to PC in architecture, but because of its simple function, it can remove many unnecessary connectors, control chips and electronic circuits, such as keyboard, mouse, USB, VGA, etc
advantages and disadvantages of storage
advantages:
NAS procts are truly plug and play procts. NAS devices generally support multi computer platforms, and users can access the same documents through network support protocol, so NAS devices can be used in mixed UNIX / Windows NT LAN without modification
the physical location of NAS devices is also flexible. They can be placed in the working group, close to the application server in the data center, or in other places, and connected to the network through physical links. Without the intervention of the application server, NAS devices allow users to access data on the network, which can not only rece the CPU overhead, but also significantly improve the performance of the network
limitations:
NAS does not solve a key problem related to file servers, that is, bandwidth consumption ring backup. Unlike storage area network (SAN), which transfers backup data stream from LAN, NAS still uses network for backup and recovery. One disadvantage of NAS is that it transfers storage transactions from parallel SCSI connections to the network. That is to say, LAN must handle not only the normal end-user transport stream, but also the storage disk request including backup operation
because the stored data is transmitted through the ordinary data network, it is easily affected by other traffic on the network. When there are other big data traffic on the network, it will seriously affect the system performance; Because the stored data is transmitted through the common data network, it is easy to cause data leakage and other security problems
storage can only be accessed in the form of files, but not directly access physical data blocks like ordinary file systems, which will seriously affect the efficiency of the system in some cases, such as large databases can not use NAS
work classification
1. Electrical server
Electrical server is the lowest end proct in NAS series equipment. The electrical server is not a special additional storage device. They provide a storage location for the network, but because there are no rendant and high-performance components, they are relatively cheap. In the working group environment, electrical server plays a lot of roles. Typical services include network address translation (NAT), proxy, DHCP, e-mail, web server, DNS, firewall and VPN
2. Working group NAS
working group level NAS is especially suitable for small and medium-sized companies with relatively low storage requirements, whose storage requirements generally range from several hundred GB to 1TB. Companies running e-commerce software or large databases will need several terabytes of storage space. They use medium-sized NAS. Generally speaking, when upgrading from a workgroup to a medium-sized NAS, you'll find hot swap drives and some device boxes that can accommodate additional drives or more recovery procts, enhanced management capabilities, and a slight increase in system complexity
3. Medium sized NAS
what we call medium-sized NAS solution provides better scalability and reliability, and has similar advantages as low-end NAS, such as convenient, dedicated storage space and simple installation and management process. Compared with electrical server and team level NAS, the cost of these NAS devices is much higher
4. The scalability, high availability and rendancy of large NAS storage devices are very important. These devices must also provide high-end server performance, flexible management and the ability to interact with heterogeneous network platforms< Office automation (OA) is the focus of government and enterprise information construction. The management and operation of modern enterprises and institutions are inseparable from the computer and LAN. When enterprises use the network for daily office management and operation, they will proce daily office documents, drawing documents, ERP and many other business data of enterprises and personal documents. There is generally no file server in the traditional internal LAN, and the above data are generally stored in the staff's computer and server, without a suitable device as its backup and storage application. Due to the low security level of personal computers and the uneven security awareness of employees, important information is easy to be stolen, maliciously damaged or lost e to hard disk failure
from the analysis of data storage in enterprises and institutions, it can be seen that in order to make the internal data of the whole enterprise and institution unified management and secure application, there must be a safe, cost-effective, convenient and simple physical medium to store and back up the internal data of the enterprise. NAS network storage server is a specially designed file storage and backup server, which can manage the data in the network reasonably, effectively and safely, and can automatically back up the database and other application data to NAS as a backup device
2. Tax NAS solutions
the tax instry needs a comprehensive system integrating business, information and decision support. Instry business system is mainly tax collection and management information system, as well as tax business information, general business information and so on. The whole system combines administrative office information, assistant decision-making information and business system to form a general integrated system platform, so as to form a complete, integrated and integrated tax business management system
the business data, daily office documents and data e-mail system of the tax instry are very important. Once the data is lost, it will bring trouble to the daily work and the tax work of the whole region. To ensure the safe operation and application of the whole data has become a practical problem that must be solved in the tax instry. The solution to this problem is to store or back up these data to a safe, fast and convenient application environment, so as to ensure the safe operation of tax instry data
in order to reasonably solve the problem of data business data backup and storage, a NAS network storage server can be used to store and backup business data and daily office data. In the business host, the information in the database is directly backed up to NAS through the incremental data backup function. Together with the business information inside the LAN and the daily office documents or CD-ROM based data of the staff, they can be stored on the NAS server, so that the staff can use and browse these data at any time. After using NAS, the administrator can arrange and manage the internal data effectively and reasonably, separate the data files from other network machines, realize the decentralized storage of data and manage the data environment system uniformly
3. Advertising NAS solutions
advertising design instry is a comprehensive service instry integrating market research, marketing strategy, creative proction, design execution, post proction and media release
the data storage mode of many advertising companies is relatively backward, with high cost and low efficiency. The main problem is poor data security; It is difficult to store and manage a large amount of old data; There are multiple operating system platforms and complex devices, which make it difficult to share and manage the stored data, resulting in low efficiency; The resignation of advertising designers results in the loss of design materials. NAS is used to store and back up the business data in the network of advertising design instry, so as to realize the centralized storage, backup, analysis and sharing of data. According to the different requirements of design and research units for different data, the existing data is fully utilized, and the data storage platform of advertising design instry is reasonably constructed, so as to improve the transmission speed of information and save time, It improves the work efficiency
4. Ecation NAS solution
since the "school to school" project was proposed, all schools are actively building their own campus network, so that they can adapt to the development of the information age in time in the future. With the "school to school" project graally in place, "resource to school" has become the focus of the next step of information construction, specifically reflected in the school needs a lot of resource information to meet the needs of students and teachers. With the continuous increase of data resources in campus, the physical medium that needs to store data has a large capacity of storage space and security, and has a very fast transmission rate to ensure the safe and fast access of the whole data
in the process of campus network construction, emphasis is laid on the construction of network system, and a large number of advanced equipment are equipped on the network, but the teaching application resources on the network are relatively scarce. The original storage mode will show many disadvantages when increasing teaching resources: because all the ecation resources in the traditional network application are stored on one server, the cost of the server with high performance and high expansion ability is high; Access to teaching resources and application services will compete for system resources, resulting in a substantial decline in the efficiency of system services; The system failure of application server will directly affect the security and availability of resource data, and bring inconvenience to the teaching work of the school
to solve these problems, NAS devices can be introced to realize centralized storage
7. Similarly, when virtual machines migrate between physical servers to maximize the efficiency of the whole environment, the network media shared between these servers should be switched and converted quickly
if all virtualization environments have a common theme, it is the storage space requirements of Data Center Virtualization. Although the market is more inclined to use the storage area network (SAN) technology, network attached storage (NAS) can also meet the needs of enterprise data center
there are two main ways to realize network storage: NAS and San. The performance of these two methods is different in network architecture and network client. NAS devices use the existing IP network and transport file layer to access, extract its available physical disks, and provide a consistent file system to terminal clients such as CIFS or NFS in the way of network sharing. NAS devices optimize network file sharing because they are almost the same as file servers
on the contrary, San technology, including fibre channel (FC) and iSCSI, realizes data block layer access, abandons file system abstraction and behaves as unformatted hard disk on the client side
. FC is the most popular SAN Technology at present. It runs on a dedicated network and requires the use of dedicated FC switches and host bus adapters (HbAS) on each server. Fibre channel over Ethernet (FCoE) is a new standard, which combines storage and IP networks into one aggregate switch, but it still needs to use a special aggregate network adapter (CNA) on each server
another block level technology, iSCSI, encapsulates SCSI commands in IP traffic and can use the existing Ethernet network interface adapter, but it usually adds a TCP / IP offload engine (toe) to optimize performance. San solutions have some advantages over NAS devices in terms of performance, but there are also some disputes. A partition of San array can be shared on two hosts, but the two hosts will regard the space as their own, so there will be the risk of space contention between the two hosts. Although there are some ways to solve this resource contention problem, this fix will add an extra layer of abstraction - which is already included in the NAS solution
both types of virtualized storage data centers have their own functions. For example, Microsoft's exchange server only supports network storage that accesses data at the block level. As the performance of San is generally better than NAS solution, enterprises will use storage network, such as database, in the application with high I / O requirements. However, for the purpose of managing virtual machine image library, file level access is probably the simplest deployment method in many environments. According to the different requirements of the organization, data center managers may require the storage team to implement file level storage, or directly install a dedicated NAS device to meet their data center virtualization storage requirements
NAS alternatives in virtualized environments
although many people regard NAS devices as the clearest way to support virtualized environments, there are still many alternatives. For organizations that have deployed San, they can use nas-san hybrid solution to build file system abstraction on top of San available space. A hybrid solution can create an abstraction layer that data center managers prefer while maintaining the performance and manageability of the central storage network. Smaller organizations can also consider sharing directly attached storage space on physical servers, using one of the servers as a central repository, while the rest of the servers get VM images from this server. Although this solution can run in the smallest environment, it can quickly lead to I / O bottlenecks in larger environments
network design considerations of NAS in virtualization
fortunately, for network administrators, NAS devices rely on the same file sharing and transfer protocols as most file servers, so the design method of deploying and using NAS is very similar. However, e to the nature of the virtualization environment and the large number of files involved, some special considerations need to be considered as early as possible when transferring these virtual machine images on the target server
ring NAS deployment, network administrators should ensure that all relevant connections use at least Gigabit Ethernet. They must also verify that the number of ports used by the network switches connected to the virtual environment is sufficient to provide sufficient bandwidth for the storage devices. Administrators should also re evaluate the quality of service (QoS) policies that may affect the connection between servers and storage, and adjust them when necessary, so as to give higher priority to the increased storage traffic. Network baseline setting before and after NAS deployment can clearly recognize the impact of adding NAS devices to the data center network. If there is a performance problem, it is also a solution to divide the network storage traffic through VLAN or private switch
network administrators should work closely with data center managers to test and compare the various network protocols available on NAS devices, such as NFS and CIFS. The implementation of these two standards will vary greatly e to the differences of network devices, operating systems and virtualization storage solutions. Due to platform differences and different organizational requirements, performance testing of each available method will help you determine the best solution in a specific environment
finally, network administrators and data center managers need to pay attention to the growth that may exceed the technical support capacity when deploying a NAS device in the data center. The role of networked storage may increase rapidly, leading to I / O bottlenecks and other problems. Rapid repair of virtual environments may snowball into an enterprise storage solution, especially in small organizations. To be sure, even a very small NAS deployment will discuss the development of a more inclusive enterprise network storage strategy. According to different requirements, if the enterprise needs higher throughput, then the network storage may need to grow into a larger scale NAS solution or migrate to San solution.
if all virtualization environments have a common theme, it is the storage space requirements of Data Center Virtualization. Although the market is more inclined to use the storage area network (SAN) technology, network attached storage (NAS) can also meet the needs of enterprise data center
there are two main ways to realize network storage: NAS and San. The performance of these two methods is different in network architecture and network client. NAS devices use the existing IP network and transport file layer to access, extract its available physical disks, and provide a consistent file system to terminal clients such as CIFS or NFS in the way of network sharing. NAS devices optimize network file sharing because they are almost the same as file servers
on the contrary, San technology, including fibre channel (FC) and iSCSI, realizes data block layer access, abandons file system abstraction and behaves as unformatted hard disk on the client side
. FC is the most popular SAN Technology at present. It runs on a dedicated network and requires the use of dedicated FC switches and host bus adapters (HbAS) on each server. Fibre channel over Ethernet (FCoE) is a new standard, which combines storage and IP networks into one aggregate switch, but it still needs to use a special aggregate network adapter (CNA) on each server
another block level technology, iSCSI, encapsulates SCSI commands in IP traffic and can use the existing Ethernet network interface adapter, but it usually adds a TCP / IP offload engine (toe) to optimize performance. San solutions have some advantages over NAS devices in terms of performance, but there are also some disputes. A partition of San array can be shared on two hosts, but the two hosts will regard the space as their own, so there will be the risk of space contention between the two hosts. Although there are some ways to solve this resource contention problem, this fix will add an extra layer of abstraction - which is already included in the NAS solution
both types of virtualized storage data centers have their own functions. For example, Microsoft's exchange server only supports network storage that accesses data at the block level. As the performance of San is generally better than NAS solution, enterprises will use storage network, such as database, in the application with high I / O requirements. However, for the purpose of managing virtual machine image library, file level access is probably the simplest deployment method in many environments. According to the different requirements of the organization, data center managers may require the storage team to implement file level storage, or directly install a dedicated NAS device to meet their data center virtualization storage requirements
NAS alternatives in virtualized environments
although many people regard NAS devices as the clearest way to support virtualized environments, there are still many alternatives. For organizations that have deployed San, they can use nas-san hybrid solution to build file system abstraction on top of San available space. A hybrid solution can create an abstraction layer that data center managers prefer while maintaining the performance and manageability of the central storage network. Smaller organizations can also consider sharing directly attached storage space on physical servers, using one of the servers as a central repository, while the rest of the servers get VM images from this server. Although this solution can run in the smallest environment, it can quickly lead to I / O bottlenecks in larger environments
network design considerations of NAS in virtualization
fortunately, for network administrators, NAS devices rely on the same file sharing and transfer protocols as most file servers, so the design method of deploying and using NAS is very similar. However, e to the nature of the virtualization environment and the large number of files involved, some special considerations need to be considered as early as possible when transferring these virtual machine images on the target server
ring NAS deployment, network administrators should ensure that all relevant connections use at least Gigabit Ethernet. They must also verify that the number of ports used by the network switches connected to the virtual environment is sufficient to provide sufficient bandwidth for the storage devices. Administrators should also re evaluate the quality of service (QoS) policies that may affect the connection between servers and storage, and adjust them when necessary, so as to give higher priority to the increased storage traffic. Network baseline setting before and after NAS deployment can clearly recognize the impact of adding NAS devices to the data center network. If there is a performance problem, it is also a solution to divide the network storage traffic through VLAN or private switch
network administrators should work closely with data center managers to test and compare the various network protocols available on NAS devices, such as NFS and CIFS. The implementation of these two standards will vary greatly e to the differences of network devices, operating systems and virtualization storage solutions. Due to platform differences and different organizational requirements, performance testing of each available method will help you determine the best solution in a specific environment
finally, network administrators and data center managers need to pay attention to the growth that may exceed the technical support capacity when deploying a NAS device in the data center. The role of networked storage may increase rapidly, leading to I / O bottlenecks and other problems. Rapid repair of virtual environments may snowball into an enterprise storage solution, especially in small organizations. To be sure, even a very small NAS deployment will discuss the development of a more inclusive enterprise network storage strategy. According to different requirements, if the enterprise needs higher throughput, then the network storage may need to grow into a larger scale NAS solution or migrate to San solution.
8. Freenas is a set of free NAS server, which can turn a common PC into a network storage server. Based on FreeBSD, samba and PHP, the software supports CIFS (Samba), FTP, NFS protocols, software RAID (0,1,5) and web interface setting tools. Users can access the storage server through windows, macs, FTP, SSH and network file system (NFS); Freenas can be installed on hard disk or USB flash disk, which takes up less than 16MB. Freenas server has a bright future; Its development work is very active. Eleven revisions were released in the first four months of 2006 alone. It's a great choice to build a simple network storage server without the trouble of installing a complete set of Linux or FreeBSD.
9. NAS storage according to their actual business needs, the needs of the summary, and completed the network disk system online. It solves the problem of safe storage of employees' work files and unified management of document data. What functions can NAS storage achieve in business
1 efficient and fast application of personal files
learn from the current mainstream Internet procts, and continue to optimize, so that the operation, browsing and sharing of files are simple and easy to use, and the network disk can really become a tool for every employee. Cloud enterprise network disk will also be more convenient
2 automatic synchronization of work files on the computer
3 integration with existing mobile applications
because there is already a mobile office platform in use, and we don't want to install a variety of office software on the staff's mobile phones, so we hope to be able to use it
the cloud enterprise network disk completed the docking work within two weeks through its own set of API interface, and built the network disk function into the existing mobile office platform
4 integrate with the existing business process platform
in order to make the data easier to find and ensure the data security, build the cloud enterprise network disk system platform as the storage center of unstructured data. Through the API interface, it can quickly connect with other process platforms, save the data to the network disk, or call the data through the network disk.
1 efficient and fast application of personal files
learn from the current mainstream Internet procts, and continue to optimize, so that the operation, browsing and sharing of files are simple and easy to use, and the network disk can really become a tool for every employee. Cloud enterprise network disk will also be more convenient
2 automatic synchronization of work files on the computer
3 integration with existing mobile applications
because there is already a mobile office platform in use, and we don't want to install a variety of office software on the staff's mobile phones, so we hope to be able to use it
the cloud enterprise network disk completed the docking work within two weeks through its own set of API interface, and built the network disk function into the existing mobile office platform
4 integrate with the existing business process platform
in order to make the data easier to find and ensure the data security, build the cloud enterprise network disk system platform as the storage center of unstructured data. Through the API interface, it can quickly connect with other process platforms, save the data to the network disk, or call the data through the network disk.
10. NAS, QNAP network storage, should be the manufacturer's own system, generally domestic like to use Linux system for their own development, these storage is with these solidified operating system and file management system. Just connect the storage to the network, and other computers can access it by inputting IP. In fact, you can understand NAS as windows sharing.
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