Storage devices for virtualization have changed the data center in many ways. In addition to recovering the remaining space, it also saves power consumption and centralizes management. Although virtualization can support multiple storage methods, many enterprises choose to migrate most data from the local disk to some shared storage at the same time. This dependence on shared storage may be the biggest change virtualization brings to the data center.
Storage has become the basic application of the data center. IT is rapidly advancing. Whether it is from the development trend of cloud computing or virtualization, it can be seen that storage technology has become very important. From the perspective of storage technology launched in recent years, it has proved that the storage market is not active. The same as the general.
Many companies that have just come into contact with virtualization are entering the shared storage space for the first time. For virtual storage deployments that include SANs, there are many challenges that system architects need to face.
Challenges for Virtual Storage Investment For virtual storage deployments, the best solution is to migrate all storage requirements from a single server to a centralized SAN, but this approach is accompanied by significant cost increases. In many SAN environments, virtual servers are usually large consumers of storage resources. The cost of SAN storage itself is already very high, coupled with the increased investment for dedicated connected devices, further adding to the cost factor of the virtual storage architecture. Especially when using fiber architectures, fiber storage plus dedicated fiber switches and HBAs that need to be installed on each server are very costly.
The storage controller used to provide virtual storage capacity also adds initial investment, but on the other hand it can greatly reduce the consumption of storage resources for virtualized installations. Taking these factors into consideration, a large amount of upfront storage device investment is required to begin the deployment of virtual shared storage.
Virtual storage and its backup virtualization complete the large-scale integration of servers, and also migrate data storage requirements from a large number of previously independent servers to a centralized storage device. This change provides greater flexibility in the implementation of data protection strategies. Although traditional backup and recovery strategies can still be used for virtual infrastructure, we now have a more efficient model.
Simply put, traditional backup proxy methods can be replaced by SAN-based backups. Many virtualized and friendly storage products now provide a large number of data protection options for centralized data. For example, NetApp's SnapVault provides a disk-based SAN backup solution.
This disk-based backup method monitors the contents of data blocks on the disk. On a virtual server architecture, these data blocks may span multiple virtual machines. The SnapVault engine keeps track of those changed data blocks, thereby skipping a large number of data blocks that have not changed while being protected.
Compared to a simpler and integrated data protection solution, the biggest advantage of virtual storage SAN-based backup is its extremely short recovery time. Disk-based backup and recovery is much faster than restoring something from tape.
Many companies are committed to all the data protection work to the SAN storage controller to complete, but this is not a model that all companies can refer to. Data backup based solely on SAN storage is limited by factors such as bandwidth, remote site maintenance, and existing investments.
Other considerations for centralized storage SAN is the acronym for Storage Area Network, which is the "Storage Area Network."
SANs focus on the unique issues of enterprise-class storage. Two problems encountered in current enterprise storage solutions are the structural limitations resulting from the tight integration of data and application systems, and the limitations of the current Small Computer System Interface (SCSI) standard. In a SAN, storage devices go through a dedicated switch to a group of computers. Multi-host connections are provided in the network, allowing any server to connect to any storage array, so that it is convenient for multiple hosts to access the memory and the host to each other so that the server can directly access the required data no matter where the data is placed. . At the same time, with the explosive growth of storage capacity, SANs also allow companies to independently increase their storage capacity.
Of course, SAN storage is expensive. However, the functions of certain levels of virtual storage devices can save customers the cost of the storage device itself. For example, with the deduplication function, the SAN storage controller monitors whether multiple disks have the same data block and then only retains one instance of the duplicate data block, thereby avoiding repeatedly writing multiple times of the same data on multiple disks.
When the virtual machines integrated into the SAN are created based on the same source, this situation can be well combined with deduplication. Most virtual environment deployments are now based on virtual machine templates. For example, 10 virtual machines are created from a template. In most cases, these 10 virtual machines do not have much difference at the data block level. Especially the operating system part of the virtual machine, even if it has been patched and upgraded, is basically the same throughout its life cycle.
Virtual storage devices reduce storage requirements to raw data sizes by verbatim comparison. Some storage products also provide deduplication guarantees. NetApp is an industry leader in virtualization assurance. Under this content, NetApp promised that virtualization deployment can save at least 50% of the space.
Deduplication is one of the key factors to consider when considering which virtualization storage device to use. This feature can help establish a cost model to analyze which product fits what needs.
Most SAN storage comes with a front-end controller, which is an important aspect to consider when initially investing in storage devices for virtualization. Before choosing a storage platform, it is important to analyze how many terabytes of data actually exist. Assuming a virtual storage capacity requirement of only 3TB, there is no need to choose a large, dual-controller SAN storage device with deduplication to save space. If the virtual storage device has more than 15 TB of data, investing in SAN devices with additional capabilities makes a lot of sense.
Storage has become the basic application of the data center. IT is rapidly advancing. Whether it is from the development trend of cloud computing or virtualization, it can be seen that storage technology has become very important. From the perspective of storage technology launched in recent years, it has proved that the storage market is not active. The same as the general.
Many companies that have just come into contact with virtualization are entering the shared storage space for the first time. For virtual storage deployments that include SANs, there are many challenges that system architects need to face.
Challenges for Virtual Storage Investment For virtual storage deployments, the best solution is to migrate all storage requirements from a single server to a centralized SAN, but this approach is accompanied by significant cost increases. In many SAN environments, virtual servers are usually large consumers of storage resources. The cost of SAN storage itself is already very high, coupled with the increased investment for dedicated connected devices, further adding to the cost factor of the virtual storage architecture. Especially when using fiber architectures, fiber storage plus dedicated fiber switches and HBAs that need to be installed on each server are very costly.
The storage controller used to provide virtual storage capacity also adds initial investment, but on the other hand it can greatly reduce the consumption of storage resources for virtualized installations. Taking these factors into consideration, a large amount of upfront storage device investment is required to begin the deployment of virtual shared storage.
Virtual storage and its backup virtualization complete the large-scale integration of servers, and also migrate data storage requirements from a large number of previously independent servers to a centralized storage device. This change provides greater flexibility in the implementation of data protection strategies. Although traditional backup and recovery strategies can still be used for virtual infrastructure, we now have a more efficient model.
Simply put, traditional backup proxy methods can be replaced by SAN-based backups. Many virtualized and friendly storage products now provide a large number of data protection options for centralized data. For example, NetApp's SnapVault provides a disk-based SAN backup solution.
This disk-based backup method monitors the contents of data blocks on the disk. On a virtual server architecture, these data blocks may span multiple virtual machines. The SnapVault engine keeps track of those changed data blocks, thereby skipping a large number of data blocks that have not changed while being protected.
Compared to a simpler and integrated data protection solution, the biggest advantage of virtual storage SAN-based backup is its extremely short recovery time. Disk-based backup and recovery is much faster than restoring something from tape.
Many companies are committed to all the data protection work to the SAN storage controller to complete, but this is not a model that all companies can refer to. Data backup based solely on SAN storage is limited by factors such as bandwidth, remote site maintenance, and existing investments.
Other considerations for centralized storage SAN is the acronym for Storage Area Network, which is the "Storage Area Network."
SANs focus on the unique issues of enterprise-class storage. Two problems encountered in current enterprise storage solutions are the structural limitations resulting from the tight integration of data and application systems, and the limitations of the current Small Computer System Interface (SCSI) standard. In a SAN, storage devices go through a dedicated switch to a group of computers. Multi-host connections are provided in the network, allowing any server to connect to any storage array, so that it is convenient for multiple hosts to access the memory and the host to each other so that the server can directly access the required data no matter where the data is placed. . At the same time, with the explosive growth of storage capacity, SANs also allow companies to independently increase their storage capacity.
Of course, SAN storage is expensive. However, the functions of certain levels of virtual storage devices can save customers the cost of the storage device itself. For example, with the deduplication function, the SAN storage controller monitors whether multiple disks have the same data block and then only retains one instance of the duplicate data block, thereby avoiding repeatedly writing multiple times of the same data on multiple disks.
When the virtual machines integrated into the SAN are created based on the same source, this situation can be well combined with deduplication. Most virtual environment deployments are now based on virtual machine templates. For example, 10 virtual machines are created from a template. In most cases, these 10 virtual machines do not have much difference at the data block level. Especially the operating system part of the virtual machine, even if it has been patched and upgraded, is basically the same throughout its life cycle.
Virtual storage devices reduce storage requirements to raw data sizes by verbatim comparison. Some storage products also provide deduplication guarantees. NetApp is an industry leader in virtualization assurance. Under this content, NetApp promised that virtualization deployment can save at least 50% of the space.
Deduplication is one of the key factors to consider when considering which virtualization storage device to use. This feature can help establish a cost model to analyze which product fits what needs.
Most SAN storage comes with a front-end controller, which is an important aspect to consider when initially investing in storage devices for virtualization. Before choosing a storage platform, it is important to analyze how many terabytes of data actually exist. Assuming a virtual storage capacity requirement of only 3TB, there is no need to choose a large, dual-controller SAN storage device with deduplication to save space. If the virtual storage device has more than 15 TB of data, investing in SAN devices with additional capabilities makes a lot of sense.
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