634results about How to "Improve migration efficiency" patented technology

The present invention provides an effective method for migrating the system services on which applications depend, rather than all of the system services, from a source OS platform to a target platform, in order to provide a suitable and consistent environment for the applications, while reducing the cost of the migration. The migration method further classifies the configurations of system services on different platforms into common configurations and specific configurations to accelerate the determination of the source of a migration error.

The invention discloses a data cross-platform migration method and a data cross-platform migration device, which are used for data migration between different database systems. The device comprises a source data information module, a target data information module, a conversion module, an SQL (Structured Query Language) Engine, a data packet encapsulation, transmission and analysis module and an SQL statement execution module. The information on a source data platform and the information on a target data platform are described through the source data information module and the target data information module, a table is acquired from the source database to generate a Table object, the Table object is subjected to format conversion by the conversion module according to an XML (Extensible Markup Language) file for describing the mapping relation of fields between the databases, the converted information is constructed into an SQL statement by the SQL Engine, the SQL statement is encapsulated and transmitted to the platform where the target database is positioned, and the SQL statement is executed on the target platform to finish data migration. The method and the device realize smooth and lossless migration of the data between different databases of a heterogeneous platform.

The invention provides a method for dynamic migration of WAN (Wide Area Network) virtual machines. The method aims to perform dynamic migration of one or more virtual machines from a source host to a destination host in a wide area network. The method comprises the following steps of: establishing a distributed index of the internal memory and external memory data of all virtual machines in operation in a data center to which the destination host belongs, thus forming a destination host environment; in the migration process of the virtual machines, retrieving the internal memory and external memory data of the virtual machines in the source host in the destination host environment, and transmitting the internal memory and external memory data not present in the destination host environment only through the wide area network; and simultaneously, in the transmission process, marking internal memory and external memory dirty blocks by the virtual machine manager of the source host, iteratively sending the internal memory and external memory dirty blocks until reaching a stop condition, and then stopping the transmission of the internal memory and external memory, causing the virtual machines in the source host to enter a stop stage, and starting the virtual machines by the destination host. The method is capable of reducing the network bandwidth occupied by the migration of the virtual machines in the wide area network and shortening the time of the dynamic migration of the virtual machines.

The embodiment of the invention provides a method for processing data blocks, and data block storage equipment and a data block storage system. The method comprises the following steps of: acquiring an access frequency of each data block stored in the data block storage equipment at the present within a predetermined time interval; moving the data blocks according with a preset condition to the first data block storage equipment, wherein the preset condition is that: the access frequency is less than a first preset threshold value, and the first data block storage equipment is the next data block storage equipment of the data block storage equipment at the present; and / or, the present condition is that: the access frequency is greater than a second preset threshold value, and the first data block storage equipment is the former data block storage equipment of the data block storage equipment at the present; and establishing a mapping relation table for realizing access of the moved data blocks, wherein the mapping relation table comprises a mapping relation between a logic unit address of the moved data block in the data block storage equipment at the present and a logic unit address of the moved data block in the first data block storage equipment.

The invention provides a data migration method, a data migration device and a data migration system. The method comprises the steps of acquiring SCHEMA information of a relation database table from the relation database, mapping the SCHEMA information into a XML model of a non-relation database and recording the corresponding mapping relation in a mapping relation table, Based on the mapping relation table, the data of the relation database is guided in the XML model of a non-relation database. The invention resolves the technical problem of smoothly transferring the data in the relation database to the non-relation database, which achieves the smooth switching of business data.

The invention discloses a data migration method applied in a storage system and storage devices. The system and the devices are used for solving the existing technical problem that a service needs to be interrupted in data migration. When the data in a first logical volume are needed to be migrated to a second storage device, the second storage device can create a second logical volume and can store the data of the first logical volume in the second logical volume; in a data migration process, the second storage device can receive an access request originally sent to the first logical volume in the first storage device by a host; the second storage device can execute the access request; therefore, the original service is unnecessarily interrupted in the data migration process; and the service continuity is realized.

The invention discloses a method for realizing online data migration based on Oracle database, comprising: prebuilt mv,trigger+procedure and trigger+sql*loader+ programs. The three modes comprise using operation log, total refreshment log and incremental refreshment log, and migration change to complete the data migration. By using the prebuilt mv and trigger+procedure programs according to the invention, the cross-platform, and cross-version data migration can be realized; by using the trigger+sql*loader+ program, the conversion among databases of different character sets can be realized by the text file or communication among process, in order to realize cross-character set migration.

The invention discloses a dependable virtual platform and a construction method thereof, a data migration method among platforms. The dependable virtual platform comprises a hardware security chip, a virtual machine monitor (VMM), an administrative domain, a user domain and a dependable serving domain (TSD), wherein an expanded trust chain is used by the TSD for users to establish dependable operating environment. The construction method includes: building the TSD; then establishing secure communication mechanisms between the managing domain and the TSD and between the managing domain and a domestic user domain; accomplishing calls of security application of the user domain to a dependable function by the user domain through interaction with the managing domain, accomplishing transmission and treatments of dependable orders by the managing domain through the interaction of the TSD; interacting a source platform migration engine and a goal platform migration engine; migrating migration data which is produced and based on the hardware security chip and the TSD to a goal platform, and recovering data on the goal platform, accomplishing quick migration of the TSD and a virtual machine. The dependable virtual platform and the construction method thereof, the data migration method among platforms are capable of improving safety of dependable service and providing flexible operation and deployment mechanisms for the platforms.

The invention discloses a virtual machine live migration method, a virtual machine migration management apparatus, and a virtual machine live migration system. The method comprises following steps: the virtual machine migration management apparatus maps first mirror image files of a first virtual machine working on a source terminal physical machine to an object terminal physical machine, so that second mirror image files having correspondence relations with the first mirror image files can be generated on the object terminal physical machine; the virtual machine migration management apparatus sends migration commands to the source end physical machine; the virtual machine migration management apparatus controls a second virtual machine to work on the object terminal physical machine through calling memory data of the first virtual machine and the correspondence relations, wherein the memory data of the first virtual machine is stored in the object terminal physical machine, and the second virtual machine is pre-established on the object terminal physical machine and having the same configuration with the first virtual machine; and the virtual machine migration management apparatus synchronizes disk data in the first mirror image files to the second mirror image files when the second virtual machine works on the object terminal physical machine. According to the invention, a technical problem that the live migration time is long due to a pre-copy manner is solved.

The invention discloses a migrating method and device for a virtual machine, and partly solves the problem that the switch timing between a precopy and a post-copy in a live migration hybrid-copy method is hard to determine. In some of the applicable embodiment of the invention, the virtual machine migration method comprises the steps as follows: firstly, copying the memory data of a target virtual machine to be migrated on a source physical host to a target physical host in a circulatory iteration manner by adopting a precopy method; secondly, after each round of iteration copy is ended, calculating the changing rate of a dirty page, wherein the changing rate of the dirty page represents the rate of the number changing of the remaining internal memory dirty page in a current round of iteration copy relative to the remaining internal memory dirty page in a previous round of iteration copy; thirdly, judging whether the dirty page changing rate is within a dirty page changing rate threshold range or not; fourthly, counting the frequency that the dirty page changing rate is within the dirty page changing rate threshold range and judging whether the frequency is larger than or equal to the threshold value; finally, if the frequency is larger than or equal to the threshold value, adopting the post-copy method for migrating the target virtual machine to the target physical host.

The invention discloses an application cluster migrating method and migrating device based on a service model. According to the embodiment of the invention, the automated migration of all nodes and dependence of an application cluster are realized through the service model. Through analyzing a software mirror image on which each host machine depends, the host machine of a target data center is equipped with software mirror images on which the host machine depends in batch, the application cluster migrating speed is improved, and the downtime of cluster migration is reduced. The environmental parameter of a target application cluster is bound to a node configuration document template, the configuration file of the target cluster is generated, and thus the configuration file migrating efficiency of the application cluster is improved. The mirror image warehouse of the target data center is used as the mirror image agent of the target application cluster, a needed mirror image is obtained and cached from the mirror image warehouse of a source data center according to needs, and thus the mirror image installation of the application cluster is accelerated.

The present invention provides a storage subsystem capable of realizing efficient data migration and high access performance. During migration of data between storage subsystems, data migration methods are selected between a “PUSH” type and a “PULL” type method based on a data migration policy set in advance to perform data migration processes. An access characteristics of a file and a folder storing the file are determined based on a file access frequency or a final access date and time information in a migration source storage subsystem, and the migration order of a file group determined to have a high possibility of being accessed during data migration is changed between the “PUSH” type and the “PULL” type.

An embodiment of the invention provides a cross-cluster migration method and system. According to the cross-cluster migration method and system, persistence of data inside a distributed database of a source cluster before migration can be achieved due to data operation interruption through all child nodes of the source cluster and persistence of memory data of the distributed database of the source cluster; the data transmission amount can be reduced due to compression of data tables in the distributed database of the source cluster, the compressed data tables in the distributed database of the source cluster are migrated to a target cluster, and the migration efficiency is improved; then occupied storage space and total file blocks of the data tables in the distributed database of the source cluster before migration are matched with occupied space and total file blocks of the data tables of the target cluster, after migration and accordingly the migration integrity can be verified according to a matching result.

A microorganism fuel cell device comprises an outer cover(1) of the fuel cell, an anode chamber(3), an anode(13), a cathode chamber(4), a cathode(16) and a septum(17). Wherein, the anode(13) is positioned inside the anode chamber(3); the septum(17) is positioned between the anode chamber(30) and the cathode chamber(4). The cathode(16) is a slice-shaped cathode, one surface of the slice-shaped cathode and one surface of septum(17) are jointed to form a septum cathode component(10); the surface of slice-shaped cathode not jointing with the septum(17) is positioned at one side of the cathode chamber(4). As the disclosed microorganism fuel cell device forms the septum cathode component by jointing the slice-shaped cathode with the septum, the invention further improves the moving efficiency of the media and also speeds up the cathode reaction, so that the overall reacting speed of the microorganism fuel cell for the device is greatly improved. Therefore, the invention can realize the large scaled successive disposal of the waste water.

The invention discloses a virtual server management system, a virtual server management method and a virtual server management device. In one technical scheme, the method comprises the following steps of: monitoring the running states of physical servers; and when the physical server in an abnormal running state is determined, controlling a virtual server running in the physical server to run in a physical server which stores image files of the virtual server and is in a normal running state. In the other technical scheme, the method comprises the following steps of: monitoring the running states of virtual servers running in the physical servers; and when the virtual server in an abnormal running state is determined, controlling the virtual server to run in a physical server which stores image files of the virtual server and is in a normal running state. Through the technical schemes, network resources are saved, and restart or migration efficiency of the virtual servers is improved.

The invention discloses a loose-soft rock soil stratum reverse circulation casing-following drilling tool and a drilling process. The drilling tool is of a coaxial three-passage structure and comprises a double-wall drilling stem, an auger stem, a drilling bit, a casing and a casing shoe, a central hole of an inner tube of the double-wall drilling stem and a central hole of an inner tube of the auger stem form a slag discharging passage, an annular gap between the inner tube of the auger stem and an outer tube of the auger stem forms an air incoming passage, and an annular gap between the outer tube of the auger stem and the casing forms an outer ring passage; compressed air enters the drilling bit through the air incoming passage and then is diverted and used for assisting a cutting bladeto break a stratum and realize reverse circulation deslagging. Drillings suspended in the outer ring passage go up along spiral blades, enters a deslagging passage through a deslagging window and then returns to the ground surface. Reverse circulation deslagging through a fluid medium and deslagging assisted by the spiral blades are adopted in the process of drilling, so that casing-following drilling is realized to protect hole walls, the problems of bit burying and difficulty in deslagging and hole forming in the process of loose-soft rock soil drilling can be solved, and integration of drilling, collapse preventing, dedusting and wall protecting is realized.

The invention discloses a distributed storage-based dynamic metadata optimizing method and system. The method comprises the following steps: obtaining the load of mds (metadata server) nodes; obtaining the average load of mds clusters; calculating the processing power on the basis of the memory of the mds nodes and a CPU (Central Processing Unit) to obtain corresponding weighting coefficients; and judging whether the time when the load of the mds nodes is greater than the average load exceeds the threshold or not, and if yes, migrating data of the mds nodes of which the load is greater than the average load to the mds nodes of which the load is lower than the average load. The processing power is calculated on the basis of the memory of the mds nodes and the CPU to obtain the corresponding weighting coefficients, so that the data processing power of all the mds nodes is evaluated more accurately; regional division is carried out on the metadata server; when sub-trees are migrated, the load and the machine performance are comprehensively considered; the selection strategy of sub-tree migration targets is optimized on the basis of the data processing power and the current load of each mds node; and therefore, the network flow and the migration time are reduced, and the migration efficiency is increased.

The invention discloses a method, device and system for data migration, and relates to the application field of electronic equipment. The problem of inconvenient migration of chatting records between user devices can be solved. The method includes the steps that a first user device receives a data migration instruction which carries attribute information used for identifying a chatting record to be migrated; the chatting record to be migrated is led out according to the attribute information of the chatting record to be migrated to generate a migration file; the migration file is uploaded to a network side server so that a second user device can obtain the chatting record from the network side server conveniently. The method, device and system for data migration are mainly applied to scenes that users replace mobile phones.

The invention discloses a data migration method and device used for migrating a data table from an original database to a target database of a distributed database containing multiple storage nodes. The method comprises the steps that full-amount data corresponding to a to-be-migrated data table is acquired, and a distribution column is set for each data record in the full-amount data; all the data records are migrated into all the storage nodes of the target database respectively according to the distribution columns; log point location information corresponding to the full-amount data is determined; and a log record generated after the log point location information is acquired, data operation corresponding to the log record is determined, and the data operation is executed according to the full-amount data stored in all the storage nodes of the target database. By the adoption of the scheme, the data can be migrated to the distributed database containing the storage nodes under the condition of not influencing online business, the situation that the processing capability of a distributed main node influences data migration efficiency is avoided, the data migration efficiency is improved, and real-time synchronization of the data is guaranteed.

The invention provides a clean room environment-based safe virtual machine migration method. Through the method, the credibility of physical computers is validated before the migration of a virtual machine, so that the virtual machine can be migrated onto a credible physical computer, and the confidentiality and integrity of the virtual machine data in the transmission process can be ensured. According to the method, the number of migration iterations can be decreased to a certain extent, so that the migration efficiency is improved; and the method is simple in realization process and easy to operate.

The invention discloses a method for data migration of a non-relational database HBase. According to the method, by reading configuration file information of users, data within a time period designated by the users are migrated from an old HBase cluster to a new HBase cluster. The method has the advantages that by designing RowKey, group information and time information of the data are embodied on the RowKey, and whether the data corresponding to the RowKey are within a migration time range designated by the users can be directly identified by scanning the RowKey during data migration; groups serve as data migration units, every group serves as a check point, the range of the non-synchronous data between the old HBase cluster and the new HBase cluster can be rigidly controlled within one group when abnormal conditions occur, and time required for restoring data synchronization is reduced; log information is recorded in the data migration process to be used for treating the abnormal conditions in the data migration process, synchronization of the data between the old cluster and the new cluster is guaranteed, and data migration between the HBase clusters can be finished accurately and efficiently.

The invention discloses a cross-platform unified big data SQL (Structured Query Language) query method, which comprises the following steps of: expanding part of SQL semantics, and providing a unifiedcross-platform SQL query language for a user; enabling a unified SQL parser to parse the query statement submitted by the user into a logic query plan, and verifying the legality of the query statement according to the meta information stored in the unified meta database; enabling a cross-platform optimizer to optimize the structure and the connection sequence of the logic query plan and convertthe logic query plan into an optimal physical execution plan composed of a plurality of sub-queries bound with an execution platform; enabling a cross-platform scheduler to convert the optimal physical execution plan into a task flow graph, automatically schedule the task flow graph according to the dependency relationship among the tasks and execute all the tasks; designing a unified platform layer interface meeting cross-platform SQL query requirements, and shielding operation differences between different execution platforms. The cross-platform unified big data SQL query method solves the problems that an existing cross-platform query method is poor in usability, low in performance, large in data migration cost and the like.

The invention discloses a hot spot data detection method and device. The method comprises the following steps: detecting the value of a data block k according to a correlation coefficient between the data block k and one or more data blocks and the reading-writing frequency of the data block k, wherein the correlation coefficient represents the reading-writing correlation degree of two data blocks; determining whether the data block k is a hot spot datum or not according to the value of the data block k and a preset data migration strategy. According to the method, the value of the data block is determined according to the correlation coefficient of the data block, and a determination on whether the data block is a hot spot datum or not is made according to the value of the data block, so that hot spot data detection is more accurate and reliable than the conventional method, the efficiency of data migration is increased, migration of hot spot data in the inner magnetic track and the outer magnetic track of a magnetic disk according to values is realized, the access performance of the magnetic disk can be improved effectively, and the overall performance of a magnetic disk array is enhanced greatly.

The invention discloses a preparation method and application of a graphite phase carbon nitride nanosheet visible-light-induced photocatalyst synthesized by promotion of ionic liquid and belongs to the technical field of material preparation and photocatalysis. A graphite phase carbon nitride nanosheet material is formed by using room-temperature ionic liquid of urea and dialkyl imidazolium tetrafluoroborate as a precursor through high-temperature co-polymerization. The graphite phase carbon nitride prepared by the preparation method has a low-dimensional nanosheet layer microstructure and a suitable forbidden bandwidth and shows more efficient photocatalytic hydrogen production performance than that of conventional body phase carbon nitride under the visible light. The graphite phase carbon nitride nanosheet visible-light-induced photocatalyst synthesized by promotion of the ionic liquid is simple in synthetic process, is low in cost, has high photocatalytic efficiency, accords with the actual production requirement and has a wide application prospect in the field of photocatalysis.

The invention discloses a data migration method and device and is used for solving the problem that in the prior art, a data migration mode is relatively low in migration efficiency and bad influences are caused in user service. The method comprises on the basis of a preset timing interval, periodically performing the following steps of determining a current migration vernier value, dividing a plurality of continuous time intervals starting from the current migration vernier value, updating the current migration vernier value to the maximum time in the plurality of time intervals, wherein the migration vernier value is initially the minimum time of the newest modification time of data records in a source database; for each divided time interval, generating a migration task corresponding to the time interval, wherein the migration task is used for migrating the data records of which newest modification time currently belongs to the time interval, in the data records of the source database to a target database; and performing the generated migration tasks concurrently.

The invention discloses a method and device for data block migration. The method includes the steps that the maximum bandwidth which permits an I / O request of an upper-layer application on a bottom-layer hierarchical storage device is set, flow of the I / O request of the upper-layer application on the bottom-layer hierarchical storage device is monitored, remaining bandwidth of the bottom-layer hierarchical storage device is calculated, when a data block needs to be migrated, whether the remaining bandwidth of the bottom-layer hierarchical storage device exists is judged, and if yes, migration I / O operation of the data block is executed. According to the method and device, under the condition that intensive migration I / O operation occurs, sufficient bandwidth can be supplied for the migration I / O operation. The remaining bandwidth is used for executing the migration I / O operation of data blocks needing migration, batch data migration is achieved, real-time performance and migration efficiency of data migration are improved, meanwhile a user defined bandwidth is set, the minimum bandwidth is used as the migration bandwidth, and influence on normal I / O operation is reduced as much as possible.

The invention relates to a data structured migration method and device, computer equipment and a storage medium. The data structured migration method comprises the steps: according to a preset sourcelibrary sub-library sub-table rule and source data table migration batch information, reading migration data of the batch from a source database; performing data analysis on the to-be-migrated data according to a preset data organization rule to obtain an analysis result which comprises a clean data table and a to-be-queried data table; writing data in the clean data table into a target database according to a preset target library sub-library sub-table rule; and detecting a selection operation of data in the to-be-queried data table, and writing the selected data into a target database according to a target library sub-library sub-table rule. By adopting the data structured migration method, the migration efficiency and the migration accuracy can be improved.

The invention discloses a method and a device for application cluster migration. The method comprises the following steps of on a cloud calculation platform, receiving an application cluster migration request sent by a user according to the agreement of a migration framework; analyzing the application cluster migration request, and determining the migration attribute information of an application cluster requesting migration; according to the determined migration attribute information, determining a node resource meeting the requirement of the application cluster migration request in an idle resource pool; according to the determined node resource and the migration framework, migrating the application cluster requesting migration to the determined node source. By adopting the scheme, the migration efficiency of the application cluster in the cloud calculation platform can be well improved.

The invention relates to a method for removing soluble heavy metal ions in situ from soil or mud / powdery deposits. In the method, a negative electrode and a positive electrode are directly inserted into the soil or a material deposit containing the soluble heavy metal ions, the driving power source of the negative electrode and the positive electrode is a pulse power source, and the positive of the pulse voltage output by the pulse power source is connected with the positive electrode, while the negative is connected with the negative electrode. The method provides the pulse power source capable of generating high-impact electric field force, eliminates three electrode polarization phenomena which cannot be overcome by the conventional DC kinetics method, has no secondary pollution on environment, and greatly improves the efficiency of removing the heavy metal ions from the soil or mud / powdery waste materials through in-situ migration by adopting the conventional DC kinetics method.