What is the metadata controller?
Metadat controller (MDC) is a type of data control used on the storage network (SAN). For most Sans there is one client who has access at the level of block or access to the physical data level. A metadata controller is required when several SAN clients are fast accessing the same block on the same disk volume. MDC is used to lock files, move and allocate data space and provide authorization to clients for different levels of blocks. MDCs are only used on top servers and are never found on user computers. Unlike normal servers that provide file -level access to use and manipulate the file, this type of server provides block access. This is known as low-level approach-lower than conventional user computers have access-which determines the storage and performance of data. This type of storage is flexible and all the WS users and users who are introduced from the San itself for easy introduction. Without a metadata controller to change access or lockThere is no way to be private data. At the same time, this controller may act as a sharing device when administrators give other servers to certain blocks.
When access to the block is awarded via the controller, another server can look at the block block. If the file is locked, it means that the server does not see a block or cannot change the block depending on the access level. If access to access, which can be done, if different clients know each other on San, then the block can be transferred from one server to another, allowing the other server to use the block.
Together with approach and locking, metadata Contoller performs another major function for longevity of SAN: space allocation. This allows administrators to move around blocks for the best performance. When the blocks are properly assigned, memory channels can be used efficiently.
metadata controllers can be used for manyand different types of Sans and networks. When used with correct networks, performance increases. When the MDC is associated with an incorrect network, even if it works, it usually reduces performance. If the metadata controller is used, the entire computer must usually be entered as a controller.