Abstract: Provided are an apparatus for automating the installation and configuration of infrastructure. The apparatus comprises, an installation information management module which receives installation information of an open-source solution and manages the installation information in a tree structure based on a parent-child relationship, an environment setting management module which receives environment setting information of equipment and manages the environment setting information in a tree structure based on a parent-child relationship, and an installation package management module which generates an installation package and an installation automation script using the installation information and the environment setting information.

Abstract: Provided is a method of file synchronizing. The method includes: determining whether there is a changed matter in a file which is divided into a plurality of chunk files; calculating a hash value for each of plurality of divided chunk files when it is determined that there is a changed matter in file; transmitting a hash value list configured by calculated hash values to a server; receiving a transmission request for a chunk file corresponding to a hash value which is not stored in server, among hash values included in hash value list; and transmitting chunk file to the server in response to the transmission request.

Abstract: Methods for generating a unique identifier of a distributed computing system are provided, one of methods comprise, receiving, by the first virtual machine, a first index range allocated by the identifier allocation server, receiving, by the second virtual machine, a second index range allocated by the identifier allocation server, the second index range being different from the first index range, generating, by the first virtual machine, a first unique identifier using an index in the first index range without intervention of the identifier allocation server and generating, by the second virtual machine, a second unique identifier using an index in the second index range without intervention of the identifier allocation server, wherein the first unique identifier and the second unique identifier are identifiers satisfying uniqueness for the whole distributed computing system.

Abstract: A method of controlling network bandwidth, the method being performed by a server and comprising: receiving a transmission request for data from a client, calculating a delay time for controlling bandwidth of the client, receiving chunks of the data from the client at intervals of the delay time and restoring the data by merging the chunks. A method of controlling network interface, the method being performed by a server and comprising: receiving a reception request for data from a client, calculating a delay time for controlling bandwidth of the client, and sending chunks of the data to the client at intervals of the delay time.

Abstract: Provided are an apparatus for automating the installation and configuration of infrastructure. The apparatus comprises, an installation information management module which receives installation information of an open-source solution and manages the installation information in a tree structure based on a parent-child relationship, an environment setting management module which receives environment setting information of equipment and manages the environment setting information in a tree structure based on a parent-child relationship, and an installation package management module which generates an installation package and an installation automation script using the installation information and the environment setting information.

Abstract: Methods for generating a unique identifier of a distributed computing system are provided, one of methods comprise, receiving, by the first virtual machine, a first index range allocated by the identifier allocation server, receiving, by the second virtual machine, a second index range allocated by the identifier allocation server, the second index range being different from the first index range, generating, by the first virtual machine, a first unique identifier using an index in the first index range without intervention of the identifier allocation server and generating, by the second virtual machine, a second unique identifier using an index in the second index range without intervention of the identifier allocation server, wherein the first unique identifier and the second unique identifier are identifiers satisfying uniqueness for the whole distributed computing system.

Abstract: Provided is a method of file synchronizing. The method includes: determining whether there is a changed matter in a file which is divided into a plurality of chunk files; calculating a hash value for each of plurality of divided chunk files when it is determined that there is a changed matter in file; transmitting a hash value list configured by calculated hash values to a server; receiving a transmission request for a chunk file corresponding to a hash value which is not stored in server, among hash values included in hash value list; and transmitting chunk file to the server in response to the transmission request.

Abstract: Provided are a channel connection management method comprising: registering a first command channel connected between a server and a first client; and transmitting a signal for requesting the connection of a data transmission channel to the first client through the first command channel

Abstract: In a message retransmission apparatus, a storage unit stores store a plurality of non-transmission messages, each being assigned a respective destination device to which delivery, over a communication network, is indicated as unsuccessful. A calculation unit sets a respective retransmission time for each of the plurality of non-transmission messages. A communication unit retransmits a given non-transmission message at a given respective retransmission time a given respective destination device, and, in response to an indication that delivery of the given non-transmission message over the communication network is successful, retransmits the other non-transmission messages to the respective destination devices without waiting for the respective retransmission times thereof.

Abstract: In a message retransmission apparatus, a storage unit stores store a plurality of non-transmission messages, each being assigned a respective destination device to which delivery, over a communication network, is indicated as unsuccessful. A calculation unit sets a respective retransmission time for each of the plurality of non-transmission messages. A communication unit retransmits a given non-transmission message at a given respective retransmission time a given respective destination device, and, in response to an indication that delivery of the given non-transmission message over the communication network is successful, retransmits the other non-transmission messages to the respective destination devices without waiting for the respective retransmission times thereof.