摘要:
A system including: one or more file systems for storing data; a snapshot producing section for producing snapshots for the file systems based on a pre-scheduled snapshot acquisition time; a remote copy section for remote copying difference data for the snapshots based on pre-scheduled remote copy start times; and a scheduling section for re-scheduling the time of one or more of an Nth snapshot acquisition time, an Nth remote copy start time, and an (N+1)th remote copy start time, in such a manner that remote copying starting at the Nth remote copy start time finishes by the (N+1)th remote copy start time.
摘要:
A cluster of computer system nodes connected by a storage area network include two classes of nodes. The first class of nodes can act as clients or servers, while the other nodes can only be clients. The client-only nodes require much less functionality and can be more easily supported by different operating systems. To minimize the amount of data transmitted during normal operation, the server responsible for maintaining a cluster configuration database repeatedly multicasts the IP address, its incarnation number and the most recent database generation number. Each node stores this information and when a change is detected, each node can request an update of the data needed by that node. A client-only node uses the IP address of the server to connect to the server, to download the information from the cluster database required by the client-only node and to upload local disk connectivity information.
摘要:
Load sharing clusters in which each node is responsible for one or more non-overlapping subset(s) of the cluster namespace and will process only those requests that access file or directory objects in the partitioned namespace that the node controls while redirecting requests designated for other nodes. A non-overlapping subset may be migrated from a source node to a destination node, for example, for load sharing or hotspot mitigation. Migration typically includes maintaining a file virtualization link from the destination node to the source node to permit forwarding of requests by the destination node to the source node during migration of metadata and then migration of data from the source node. After migration is complete, the file virtualization link is broken and the destination node services requests for the non-overlapping subset from the migrated metadata and data.
摘要:
The file sharing system of the present invention is able to provide a client with a single logical directory and reproduces the single logical directory in a remote site when the local site has stopped in use of a remote copy that is made between the local site and remote site. The first site provides the client with a logical directory that is constituted across respective nodes in the first site. The remote copy is executed between the first and second sites, and the data of both sites are synchronized. For the generation of the logical directory and the management of the remote copy, a common management table is used, and the management table is held by all of the nodes. In cases where the first site stops due to a fault, the second site utilizes information related to the remote copy in the management table to construct the logical directory and reproduces the logical directory in the second site.
摘要:
The file sharing system of the present invention selects a suitable data migration method that corresponds with the usage status and transfers data efficiently. A virtual volume and a migration source volume which is the migration target volume are associated by means of an external connection control section. When an instruction for volume migration is issued, the usage percentage judgment section compares the usage percentage of the migration source volume with a designated threshold value. When the usage percentage is equal to or more than the threshold value, volume copying is selected. The volume copy section copies data at the block level from the virtual volume to the migration destination volume. When the usage percentage is less than the threshold value, file copying is selected. The file copy section reads files stored in the migration source volume via the host and writes the files to the migration destination volume.
摘要:
A NAS system including a NAS controller which processes file level input/output requests and controls the NAS system, and a storage apparatus having a controller which controls a storage device upon which plural volumes for storing data are represented. In the invention when at least a portion of data of a file stored on a volume is updated, the updated data is stored to an unused area of the volume, information is stored on the volume indicating that the updated data corresponding to original data stored in an original area is stored in the unused area so that subsequent accesses to the original of the updated data is directed to the updated data stored in the unused area, and the original of the updated data is retained in the original area, thereby implementing long term data archiving of the original of the updated data.
摘要:
The present invention remote copies difference data for snapshots in an appropriate manner. A NAS system having one or more file systems for storing data, a snapshot producing section for producing snapshots for the file systems based on a pre-scheduled snapshot acquisition time, a remote copy section for remote copying difference data for the snapshots based on pre-scheduled remote copy start times, and a scheduling section for re-scheduling the time of one or more of an Nth snapshot acquisition time, an Nth remote copy start time, and an (N+1)th remote copy start time, in such a manner that remote copying starting at the Nth remote copy start time finishes by the (N+1)th remote copy start time.
摘要:
A storage server uses a semantic processor to parse and respond to client requests. A direct execution parser in the semantic processor parses an input stream, comprising client storage server requests, according to a defined grammar. A semantic processor execution engine capable of manipulating data (e.g., data movement, mathematical, and logical operations) executes microcode segments in response to requests from the direct execution parser in order to perform the client-requested operations. The resulting operational efficiency allows an entire storage server to be collapsed in some embodiments into a few relatively small integrated circuits that can be placed on a media device's printed circuit board, with the semantic processor itself drawing perhaps a few Watts of power.
摘要:
Applications, systems and methods for securely and remotely operating a remote computer from a local computer over a network while providing seamless, firewall-compliant connectivity. Secure and remote operation includes authenticating at least one remote computer for connection to at least one computer over the network and/or at least one local computer for connection to at least one remote computer over the network; establishing a secure connection between the at least one local computer and the at least one remote computer over the network; and integrating a desktop of at least one remote computer on a display of at least one local computer. The connections may be made over a public network, as well as through multiple firewalls without loss of functionality. A method of accessing and using at least one remote computer from a local computer over a public network may include centrally authenticating, at a location having a public address, a first computer having a first, firewall protected private address; creating a first firewall compliant connection between a publicly addressed connection server and the first computer upon authentication of the first computer; establishing a second firewall compliant connection between the publicly addressed connection server and a second computer having a second firewall protected private address; establishing a private-to-public-to-private communications tunnel, wherein the connection server routes communications from the first computer through the first firewall compliant connection and the second firewall compliant connection to the second computer, and from the second computer through the second firewall compliant connection and the first firewall compliant connection to the first computer; and performing at least one further step selected from the group consisting of: integrating a file structure of accessible files accessed at the second or first computer, into a file structure contained at the first or second computer, respectively; at least one of integrating a desktop of the second computer on a display of the first computer and integrating a desktop of the first computer on a display of the second computer; and directly operating the second computer from the first computer or the first computer from the second computer, wherein the computer that is directly operated is selected from the group consisting of: home appliances, video equipment, audio equipment, printers, fax machines, office equipment, medical devices, vehicles, cameras, RFID equipment, laboratory equipment, manufacturing machinery, GPS equipment, and devices having one or more embedded microprocessors.
摘要:
Data traffic switching among computing device in a SAN environment is disclosed herein. According to an aspect, a method may be implemented at an NPV device that is associated with multiple computing devices positioned behind the NPV device in a SAN. The method may also include receiving zoning information associated with the computing devices. The method may also include determining, based on the zoning information a map for switching data traffic among the computing devices. Further, the method may include switching the data traffic among the computing devices based on the determined map.