JP2017073089A - Data distribution program, data distribution method, information processing apparatus, and information processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the time required for distributing data to a plurality of devices.SOLUTION: A data distribution method includes: transmitting each of data pieces to a plurality of destination devices by means of connectionless multicast; and calculating first acquisition rate, which is data piece acquisition rate, for each of the data pieces, on the basis of information received from each of the destination devices and indicating whether the data pieces have been acquired or not. When the first acquisition rate for each of the data pieces is larger than a threshold, instructions are transmitted to the destination devices to acquire data pieces which have not been acquired yet, from another destination device by connection communication.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a data distribution technique.

  Broadcasting is known as a technique for distributing the same data to a plurality of devices. According to the broadcast, data can be distributed to all devices belonging to the same network segment at a time, so that the time required for data distribution can be shortened. However, since broadcast communication is not connection-type communication, delivery of data is not guaranteed.

  A document discloses the following technique regarding data transmission. In this technology, each node in the network sends a message using a TCP (Transmission Control Protocol) path and a UDP (User Datagram Protocol) path based on the performance load of the own node, the performance load of the counterpart node, and a declaration parameter. Switch between used message transmission. The reporting parameter is a parameter for designating the performance to be emphasized (in this case, immediacy or delivery guarantee).

  However, when this technique is used, if a TCP path is selected in a case where data is distributed to a large number of nodes, it takes a long time to complete the data distribution. Further, switching between the TCP path and the UDP path is performed based only on the performance load and the reporting parameter, and attention is not paid to switching from other viewpoints.

JP 2000-181827 A

  Accordingly, an object of the present invention, in one aspect, is to provide a technique for reducing the time required for distributing data to a plurality of devices.

  In the data distribution method according to the present invention, each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication, and received from each of the plurality of destination devices. From the information indicating whether each of the data pieces has been acquired, a first acquisition rate that is an acquisition rate of the data piece is calculated for each of the plurality of data pieces, and the first acquisition rate of each of the plurality of data pieces Includes a process of transmitting an instruction to acquire an unacquired data piece from another transmission destination device to a plurality of transmission destination devices.

  In one aspect, the time required to distribute data to a plurality of devices can be shortened.

FIG. 1 is a diagram illustrating an outline of a system according to the first embodiment. FIG. 2 is a hardware configuration diagram of the server. FIG. 3 is a functional block diagram of the service processor. FIG. 4 is a functional block diagram of the management server. FIG. 5 is a diagram showing a main processing flow. FIG. 6 is a diagram for explaining division of firmware update data. FIG. 7 is a diagram illustrating an example of management data stored in the management data storage unit. FIG. 8 is a diagram illustrating an example of data stored in the data piece storage unit. FIG. 9 is a diagram illustrating an example of data stored in the overall management data storage unit. FIG. 10 is a diagram showing a main processing flow. FIG. 11 is a diagram illustrating a processing flow of the threshold setting process. FIG. 12 is a diagram illustrating an example of data stored in the overall acquisition rate storage unit. FIG. 13 is a diagram illustrating a process flow of the partial broadcast process. FIG. 14 is a diagram illustrating a processing flow of connection-type reception processing. FIG. 15 is a diagram illustrating a processing flow of connection-type transmission processing. FIG. 16 is a diagram for explaining the operation of the system. FIG. 17 is a diagram for explaining the operation of the system. FIG. 18 is a diagram for explaining the operation of the system. FIG. 19 is a diagram for explaining the operation of the system. FIG. 20 is a diagram for explaining the operation of the system. FIG. 21 is a diagram for explaining the operation of the system. FIG. 22 is a diagram for explaining the operation of the system. FIG. 23 is a diagram for explaining the operation of the system. FIG. 24 is a diagram for explaining a reduction in time required for data distribution. FIG. 25 is a diagram for explaining a reduction in time required for data distribution. FIG. 26 is a diagram for explaining the relationship between the overall acquisition rate and time. FIG. 27 is a diagram for explaining the relationship between the overall acquisition rate and time. FIG. 28 is a diagram illustrating a processing flow of connection-type reception processing according to the second embodiment. FIG. 29 is a diagram illustrating a processing flow of connection-type reception processing according to the third embodiment. FIG. 30 is a functional block diagram of a computer.

[Embodiment 1]
FIG. 1 shows a system outline of the first embodiment. The switches 1r to 4r are physical switches, for example. Servers 1s and 2s are connected to the switch 1r, servers 3s and 4s are connected to the switch 2r, and servers 5s and 6s are connected to the switch 3r. In the example of FIG. 1, two servers are connected to each of the switches 1r to 3r, but three or more servers may be connected. A server system 50 that is a parallel computer system, for example, is realized by the servers 1s to 6s.

  The switch 4r is connected to the switches 1r to 3r and the management servers 1c and 2c. The management servers 1c and 2c manage each server via a management LAN (Local Area Network). In the example of FIG. 1, the number of management servers is 2, but the number is not limited. Each server in the server system 50 is connected to another server by a dedicated interconnect or the like different from the management LAN, but is not related to the main part of the first embodiment. Is omitted.

  FIG. 2 shows a hardware configuration diagram of the server 1s. The server 1s includes a service processor 10, an IO (Input Output) board 20, and a plurality of system boards 30. The service processor 10 includes a CPU (Central Processing Unit) 101, a RAM (Random Access Memory) 102, flash memories 103 and 104, and a LAN interface unit 105, for example, a LAN card. The IO board 20 includes an FPGA (Field-Programmable Gate Array) 201 and a flash memory 202. Each of the plurality of system boards 30 includes CPUs 301 to 303. Each of the plurality of system boards 30 has a RAM and other hardware, and can operate an OS (Operating System). However, since it is not related to the main part of the present embodiment, the description is omitted in FIG. The hardware configuration diagram of the servers 2s to 6s is the same as the hardware configuration diagram of the server 1s.

  Firmware for executing the processing of the present embodiment is stored in each of the flash memories 103 and 104, and the redundant configuration can cope with a problem in operating firmware. It has become. The firmware is read into the RAM 102 by the CPU 101 and executed. The LAN interface unit 105 is connected to the management LAN.

  The firmware operating on each system board 30 is stored in the flash memory 202 of the IO board 20. The CPUs 301 to 303 read the firmware from the flash memory 202 via the FPGA 201, and develop the firmware in the RAM on the system board 30. And execute.

  FIG. 3 shows a functional block diagram of the service processor 10. The service processor 10 includes a communication processing unit 112, an overall management data storage unit 113, a management data storage unit 114, and a data piece storage unit 115. The communication processing unit 112 is realized by the firmware stored in the flash memories 103 and 104 being executed by the CPU 101, and performs communication with the management servers 1c and 2c and other servers. The overall management data storage unit 113, the management data storage unit 114, and the data piece storage unit 115 are provided in the RAM 102, for example.

  FIG. 4 shows a functional block diagram of the management server 1c. The management server 1 c includes a communication processing unit 1001, a calculation unit 1002, an overall management data storage unit 1003, and an overall acquisition rate storage unit 1005. The functional block diagram of the management server 2c is the same as the functional block diagram of the management server 1c.

  The communication processing unit 1001 executes communication with the servers 1s to 6s. The calculation unit 1002 uses the data stored in the overall management data storage unit 1003 to execute processing for calculating the overall acquisition rate and individual acquisition rate, processing for setting a threshold, and the like, Store in the storage unit 1005.

  Next, the operation of the system according to the first embodiment will be described with reference to FIGS. Here, in order to simplify the explanation, it is assumed that the management server 1c operates among the management servers 1c and 2c. However, the management servers 1c and 2c may share processing.

  First, the communication processing unit 1001 of the management server 1c divides a program (hereinafter referred to as “firmware updater”) for updating firmware stored in the flash memory 202 in the service processor 10 of each server. Then, the communication processing unit 1001 adds identification information to each divided data piece (FIG. 5: step S1). The firmware updater is assumed to be stored in advance in a storage device in the management server 1c.

  The process of step S1 is demonstrated using FIG. In step S1, the firmware updater is divided into a plurality of data pieces. The size of the data piece including the identification information is determined by the value of the MTU (Maximum Transmission Unit) so that one data piece can be contained in one packet of connectionless communication (broadcast communication in this embodiment). The The MTU is 1.4 kilobytes in the Ethernet environment. In this way, one packet loss in broadcast communication can be treated as one data piece loss. Also, the identification information included at the head of each data piece allows the service processor 10 to know what data piece has been received.

  Returning to the description of FIG. 5, the communication processing unit 1001 transmits a broadcast communication start notification including information on the number of data pieces to the service processor 10 of each server (step S <b> 3). Then, the communication processing unit 112 in the service processor 10 of each server receives the broadcast communication start notification (step S5), and stores the information on the number of data pieces included in the broadcast communication start notification in the RAM 102.

  On the other hand, the communication processing unit 1001 of the management server 1c transmits one untransmitted data piece to the service processor 10 of each server by broadcast communication (step S7). In the first embodiment, the pieces of data indicated by the identification information are transmitted in ascending order. Then, the communication processing unit 112 in the service processor 10 of each server receives one data piece from the management server 1c (step S9). However, since there is no delivery guarantee in broadcast communication, the communication processing unit 112 may not receive a data piece.

  Whether or not a data piece has been received is managed by management data. FIG. 7 shows an example of management data stored in the management data storage unit 114. In the example of FIG. 7, data piece identification information and information indicating whether or not the data piece is included are stored. Note that when the start notification is not received for the first time (that is, when broadcast communication has already been executed once), the already generated management data is updated.

  The received data piece is stored in the data piece storage unit 115. FIG. 8 shows an example of data stored in the data piece storage unit 115. In the example of FIG. 8, data piece identification information and data pieces are stored.

  Returning to the description of FIG. 5, the communication processing unit 1001 of the management server 1c determines whether there is an untransmitted data piece (step S11). When there is an unsent data piece (step S11: Yes route), the process returns to step S7. On the other hand, when there is no unsent data piece (step S11: No route), the process proceeds to step S21.

  On the other hand, the communication processing unit 112 in the service processor 10 of each server determines whether a predetermined time has elapsed since the start notification was received (step S13). When a predetermined time has elapsed since the start notification was received (step S13: Yes route), the process proceeds to step S19. On the other hand, when the predetermined time has not elapsed since the start notification was received (step S13: No route), the communication processing unit 112 determines whether the last data piece has been received (step S15). Whether or not the last data piece has been received is determined by whether or not the identification information of the last received data piece matches the number obtained by subtracting 1 from the number of data pieces stored in the RAM 102.

  When the last data piece has not been received (step S15: No route), the process returns to step S9. On the other hand, when the last data piece is received (step S15: Yes route), the communication processing unit 112 reads the management data stored in the management data storage unit 114. Then, the communication processing unit 112 transmits the read management data to the management server 1c (step S19). In response to this, the communication processing unit 1001 of the management server 1c receives management data (step S21).

  The communication processing unit 1001 of the management server 1c determines whether management data has been received from all the service processors 10 (step S23). If management data has not been received from all the service processors 10 (step S23: No route), the process returns to step S21. On the other hand, when the management data is received from all the service processors 10 (step S23: Yes route), the overall management data is generated or updated from the received management data (step S25) and stored in the overall management data storage unit 1003. The processing shifts to the processing in step S27 in FIG. 10 via terminals A and B.

  FIG. 9 shows an example of data stored in the overall management data storage unit 1003. In the example of FIG. 9, a server ID (IDentifier), a server IP address, data piece identification information, and information indicating whether or not the data piece is included are stored. The server ID and IP address are included in the packet including the management data transmitted in step S19. If reception of the start notification is not the first time (that is, if broadcast communication has already been executed once), the already generated overall management data is updated in step S25.

  Shifting to the description of FIG. 10, the calculation unit 1002 of the management server 1c calculates the overall acquisition rate from the overall management data stored in the overall management data storage unit 1003 (FIG. 10: step S27), and stores the overall acquisition rate. Stored in the unit 1005. The overall acquisition rate is calculated by (total acquisition rate) = (Σ number of data pieces acquired by each server) / (number of data pieces to be distributed to one server * number of servers) * 100. The second acquisition rate is an example of an overall acquisition rate.

  The calculation unit 1002 executes a threshold setting process (step S29). The threshold setting process will be described with reference to FIGS.

  First, the calculation unit 1002 determines whether it is the first threshold setting process (FIG. 11: step S51). Whether or not it is the first threshold setting process depends on whether or not the number of registered total acquisition rates stored in the total acquisition rate storage unit 1005 (that is, the number of times firmware update data has been distributed by broadcast) is less than 2. Determined. When it is the first threshold setting process (step S51: Yes route), the calculation unit 1002 sets the threshold to a default value (step S53). Then, the process returns to the calling process.

  On the other hand, when it is not the first threshold setting process (step S51: No route), the calculation unit 1002 calculates a threshold from the overall acquisition rate stored in the overall acquisition rate storage unit 1005 (step S55). Specifically, the average value of the overall acquisition rates other than the overall acquisition rate calculated in the immediately preceding step S27 among the overall acquisition rates stored in the overall acquisition rate storage unit 1005 is calculated. Then, the process returns to the calling process.

  For example, it is assumed that data as illustrated in FIG. 12 is stored in the overall acquisition rate storage unit 1005. In this case, the first threshold is a default value (50 in the example of FIG. 12), the second threshold is 43 (= 43/1), and the third threshold is 51.5 (= (43 + 60). / 2).

  Through the processing as described above, the threshold value is set to an appropriate value according to the actual overall acquisition rate. This makes it possible to optimize the timing for switching from broadcast communication to connection-type communication.

  Returning to the description of FIG. 10, the calculation unit 1002 determines whether the overall acquisition rate calculated in step S27 is equal to or less than the threshold value set in step S29 (step S31). When the overall acquisition rate calculated in step S27 is equal to or less than the threshold set in step S29 (step S31: Yes route), it is effective to execute broadcast communication again. Therefore, the process returns to the process of step S3 in FIG.

  On the other hand, when the overall acquisition rate calculated in step S27 is not less than or equal to the threshold set in step S29 (step S31: No route), the calculation unit 1002 uses the overall management data stored in the overall management data storage unit 1003. The individual acquisition rate of each data piece is calculated. Then, the calculation unit 1002 determines whether there is a data piece whose individual acquisition rate is equal to or less than a threshold (step S33). The individual acquisition rate is calculated by individual acquisition rate = (number of servers that acquired data pieces) / (number of servers) * 100. The first acquisition rate is an example of an individual acquisition rate.

  When there is a data piece whose individual acquisition rate is equal to or less than the threshold (step S33: Yes route), the calculation unit 1002 executes a partial broadcast process (step S35). The partial broadcast process will be described with reference to FIG.

  First, the communication processing unit 1001 of the management server 1c transmits a broadcast communication start notification to the service processor 10 of each server (FIG. 13: step S61). Then, the communication processing unit 112 in the service processor 10 of each server receives the broadcast communication start notification (step S63). The start notification in step S61 includes identification information of a data piece (hereinafter referred to as a target data piece) whose individual acquisition rate is equal to or less than a threshold value.

  On the other hand, the communication processing unit 1001 of the management server 1c transmits one untransmitted target data piece to the service processor 10 of each server by broadcast communication (step S65). In the first embodiment, the target data pieces are transmitted in order from the smallest number indicated by the identification information. Then, the communication processing unit 112 in the service processor 10 of each server receives one untransmitted target data piece from the management server 1c (step S67). When the target data piece that has not been received is received, the management data storage unit 114 changes the ownership status information from “none” to “present”. When a target data piece that has not been received is received, the received target data piece is stored in the data piece storage unit 115.

  The communication processing unit 1001 of the management server 1c determines whether there is an untransmitted target data piece (step S69). When there is an untransmitted target data piece (step S69: Yes route), the process returns to step S65. On the other hand, when there is no untransmitted target data piece (step S69: No route), the process proceeds to step S79.

  On the other hand, the communication processing unit 112 in the service processor 10 of each server determines whether a predetermined time has elapsed since the start notification was received (step S71). When a predetermined time has elapsed since the start notification was received (step S71: Yes route), the process proceeds to step S77. On the other hand, when the predetermined time has not elapsed since the reception of the start notification (step S71: No route), the communication processing unit 112 determines whether the final target data piece has been received (step S73). Whether or not the last target data piece has been received is determined by whether or not the identification information of the last received target data piece matches the largest number indicated by the identification information included in the start notification. .

  If the final target data piece has not been received (step S73: No route), the process returns to step S67. On the other hand, when the last data piece is received (step S73: Yes route), the communication processing unit 112 reads the management data stored in the management data storage unit 114. Then, the communication processing unit 112 transmits the read management data to the management server 1c (step S77). In response to this, the communication processing unit 1001 of the management server 1c receives the management data (step S79).

  The communication processing unit 1001 of the management server 1c determines whether management data has been received from all the service processors 10 (step S81). If management data has not been received from all the service processors 10 (step S81: No route), the process returns to step S79. On the other hand, when management data is received from all the service processors 10 (step S81: Yes route), the overall management data stored in the overall management data storage unit 1003 is updated with the received management data (step S83). Then, the process returns to the calling process, and the process returns to step S31.

  As described above, since broadcast communication can be executed only for data pieces on which broadcast communication is to be executed, generation of useless communication load can be suppressed.

  Returning to the description of FIG. 10, when there is no data piece whose individual acquisition rate is equal to or less than the threshold (step S33: No route), the calculation unit 1002 should execute connection-type communication (for example, communication according to TCP). Is notified to the communication processing unit 1001. In response to this, the communication processing unit 1001 reads the overall management data from the overall management data storage unit 1003, and generates a connection-type communication execution instruction including the overall management data. Then, the communication processing unit 1001 transmits a connection-type communication execution instruction to each server (step S37). In response to this, the communication processing unit 112 in the service processor 10 of each server receives an instruction to execute connection-type communication (step S39). The overall management data included in the received execution instruction is stored in the overall management data storage unit 113.

  Then, the communication processing unit 112 executes a connection type reception process and a connection type transmission process (step S41). These processes are executed in parallel in different threads, for example. First, the connection type reception process will be described with reference to FIG. 14, and then the connection type transmission process will be described with reference to FIG.

  First, the communication processing unit 112 in the service processor 10 of each server 1 sets an unacquired data piece (that is, a data piece in which “none” is set) from the management data stored in the management data storage unit 114. (FIG. 14: Step S91).

  The communication processing unit 112 identifies the service processor 10 having the data piece identified in step S91 from the overall management data stored in the overall management data storage unit 113 (step S93).

  The communication processing unit 112 transmits an acquisition request including the identification information of the data piece specified in step S91 to any of the service processors 10 having the data piece specified in step S91 (step S95).

  Thereafter, the communication processing unit 112 receives the data piece specified in step S91 by connection-type communication, stores the data piece in the data piece storage unit 115, and updates the management data storage unit 114 (step S97). In step S97, data indicating the ownership status of the data piece specified in step S91 is set to “present”.

  The communication processing unit 112 determines whether there is an unacquired data piece based on the management data stored in the management data storage unit 114 (step S99). If there is an unacquired data piece (step S99: Yes route), the process returns to step S91 in order to process the next data piece. On the other hand, when there is no unacquired data piece (step S99: No route), the communication processing unit 112 transmits a transfer completion notification to the management server 1c (step S101). Then, the process returns to the calling process.

  Next, connection type transmission processing will be described. First, the communication processing unit 112 in the service processor 10 of each server determines whether an acquisition request has been received from another service processor 10 (FIG. 15: Step S111). If an acquisition request has not been received from another service processor 10 (step S111: No route), the process proceeds to step S117.

  On the other hand, when the acquisition request is received from another service processor 10 (step S111: Yes route), the communication processing unit 112 converts the data piece corresponding to the identification information of the data piece included in the acquisition request into the data piece storage unit 115. (Step S113).

  The communication processing unit 112 transmits the data piece read in step S113 to the service processor 10 that is the transmission source of the acquisition request by connection-type communication (step S115).

  The communication processing unit 112 determines whether a transfer completion notification has already been transmitted (step S117). When the transfer completion notification has not been transmitted yet (step S117: No route), the process returns to step S111. On the other hand, when a transfer completion notification is transmitted in step S101 (step S117: Yes route), the process returns to the caller process.

  By executing the processing as described above, a data piece that could not be received can be reliably acquired from another service processor 10.

  Returning to the description of FIG. 10, when the transfer completion notification is transmitted in the connection-type reception process, the management server 1c receives the transfer completion notification (step S43). If the notification of transfer completion from each server is prepared, the management server 1c can determine that the transfer of the firmware update data has been completed. Thereafter, each service processor 10 executes firmware update.

  Next, the operation of the system will be described more specifically with reference to FIGS. Here, as shown in FIG. 16, service processors (indicated as SP in FIG. 16) 1p to 6p exist, and firmware update data including data pieces 0 to 3 is transferred from the management server 1c to each service processor. Think about sending to.

  Assume that each service processor has a data piece as shown in FIG. That is, service processor 1p has data piece 0, data piece 1 and data piece 3, service processor 2p has data pieces 1 to 3, service processor 3p has data pieces 0 to 2, and service processor 4p has data pieces 0 to 2, service processor 5p has data pieces 0 to 3, and service processor 6p has data piece 0, data piece 2 and data piece 3. Each service processor transmits management data indicating whether or not each data piece is present to the management server 1c.

  As shown in FIG. 17, the management server 1c receives management data from the service processors 1p to 6p, and generates overall management data from the received management data. When the overall management data shown in FIG. 17 is generated, the individual acquisition rate and the overall acquisition rate of each data piece are as shown in FIG. That is, the individual acquisition rate of data piece 0 is 83%, the individual acquisition rate of data piece 1 is 83%, the individual acquisition rate of data piece 2 is 83%, and the individual acquisition rate of data piece 3 is 67%. %, And the overall acquisition rate is 79%. When the threshold is 50 (%), there is no data piece in which the overall acquisition rate is greater than the threshold and the individual acquisition rate is equal to or less than the threshold. Therefore, switching from broadcast communication to connection-type communication is performed. Accordingly, as shown in FIG. 19, the management server 1c transmits the overall management data to each service processor.

  As shown in FIG. 20, each service processor acquires an unacquired data piece from another service processor when there is an unacquired data piece. Specifically, the service processor 1p acquires the data piece 2 from the service processor 2p, the service processor 2p acquires the data piece 0 from the service processor 1p, the service processor 3p acquires the data piece 3 from the service processor 2p, The service processor 4p acquires the data piece 3 from the service processor 5p, and the service processor 6p acquires the data piece 1 from the service processor 5p.

  As shown in FIG. 21, when there are no unacquired data pieces, each service processor transmits a transfer completion notification to the management server 1c. As a result, the management server 1c can know that the transfer of the firmware update data has been completed.

  It is assumed that the data piece acquisition status is as shown in FIG. That is, the individual acquisition rate of data piece 0 is 50%, the individual acquisition rate of data piece 1 is 33%, the individual acquisition rate of data piece 2 is 50%, and the individual acquisition rate of data piece 3 is 33. %, And the overall acquisition rate is 42%. If the threshold value is 50 (%), the overall acquisition rate is equal to or less than the threshold value, and therefore broadcast communication is executed again for all data pieces in the case of FIG.

  Further, it is assumed that the data piece acquisition situation is as shown in FIG. That is, the individual acquisition rate of data piece 0 is 83%, the individual acquisition rate of data piece 1 is 17%, the individual acquisition rate of data piece 2 is 67%, and the individual acquisition rate of data piece 3 is 100%. %, And the overall acquisition rate is 67%. If the threshold value is 50 (%), the overall acquisition rate is greater than the threshold value and the individual acquisition rate of the data piece 1 is less than or equal to the threshold value. Therefore, in the case of FIG. It will be.

  Next, shortening of the time required for distribution will be described with reference to FIGS.

  First, a case where all data pieces are transmitted by connection-type communication will be considered with reference to FIG. Here, it is assumed that the firmware update data is divided into 23 data pieces and the 23 data pieces are transmitted to the servers 1s to 5s. The time required to transmit one data piece from the management server 1c to each server is defined as a unit time. Note that the transmission is performed serially as shown in FIG. 24 because the communication speed decreases when the access from each server to the management server 1c is concentrated. By performing serialization as shown in FIG. 24, the timing at which the request to the management server 1c is output can be distributed.

  When serially transmitting data pieces by connection-type communication, the time required to transmit 23 data pieces to one server is 23 unit hours, and the total time for transmission to 5 servers is 115 unit hours. (However, for reasons of space, t = 112 to t = 115 are omitted).

  FIG. 25 considers the case of transmission by the method of the first embodiment. According to the method of the present embodiment, the start notification is transmitted by normal communication (for example, connection-type communication). Next, a data piece is transmitted to each server by broadcast communication. Next, management data is transmitted from each server to the management server 1c by normal communication. Next, the overall management data is transmitted from the management server 1c to each server by normal communication. Next, data pieces are transmitted and received between the servers by connection-type communication, and when acquisition of the data pieces is completed, a transfer completion notification is transmitted to the management server 1c by normal communication. The time required so far is 49 unit hours.

  Therefore, according to the present embodiment, distribution of the firmware update data can be completed in a time of 49/115 * 100≈42.6 (%).

  Next, FIGS. 26 and 27 show simulation results of the relationship between the overall acquisition rate and time. 26 and 27, the vertical axis represents time, and the horizontal axis represents the overall acquisition rate. The unit of the vertical axis is the unit time in FIGS. 24 and 25, and the unit of the horizontal axis is%. Assume that the number of servers is 800 and the number of data pieces is 10,000. The loss rate is the proportion of data pieces lost in one broadcast.

  In FIG. 26, the threshold value is fixed at 50 (%) for the sake of simplicity. As shown in FIG. 26, when only connection-type communication is executed, the overall acquisition rate increases in proportion to the time, and it takes about 8000000 unit time for the overall acquisition rate to reach 100%. On the other hand, when performing broadcast communication, it takes almost no time until the overall acquisition rate exceeds the threshold. When the overall acquisition rate exceeds the threshold, transmission of the overall management data is performed, so that time is spent for the transmission, and the overall acquisition rate does not increase during that time. After the transmission of the overall management data is completed, the data piece is transmitted by connection-type communication, so that the overall acquisition rate increases in proportion to the time. In this example, transmission is performed serially. That is, a plurality of servers are not executing transmission in parallel. Then, as the data piece loss rate is lower, the transmission of the firmware update data is completed in a shorter time.

  On the other hand, in FIG. 27, the threshold value is fixed at 80 (%). Compared with FIG. 26, the time required for the overall acquisition rate to reach 100% is shortened. From this, it can be understood that the time required to complete the transmission of the firmware update data can be shortened by transmitting more data pieces by broadcast communication.

  As described above, according to the first embodiment, not only the time required for distribution of firmware update data can be shortened by using broadcast communication, but each service processor 10 can be distributed by broadcast communication. It is possible to reliably acquire the missing data piece.

[Embodiment 2]
Next, a second embodiment will be described. In the second embodiment, the connection type reception process is different from the connection type reception process of the first embodiment, and the other points are the same.

  The connection type reception process in the second embodiment will be described with reference to FIG. First, the communication processing unit 112 in the service processor 10 of each server 1 sets an unacquired data piece (that is, a data piece in which “none” is set) from the management data stored in the management data storage unit 114. (FIG. 28: Step S121).

  The communication processing unit 112 specifies the closest service processor 10 among the service processors 10 having the data piece specified in step S121 from the overall management data stored in the overall management data storage unit 113 (step S123). In the second embodiment, it is assumed that the data in the overall management data storage unit 1003 is organized so that the closer to the server, the closer the data is to the server. Therefore, in step S123, among the data corresponding to the service processor 10 having the specified data piece, the service processor 10 corresponding to the data in the row closest to the data of the own server is specified.

  The communication processing unit 112 transmits an acquisition request including the identification information of the data piece specified in step S121 to the service processor 10 specified in step S123 (step S125).

  Thereafter, the communication processing unit 112 receives the data piece specified in step S121 by connection-type communication, stores the data piece in the data piece storage unit 115, and updates the management data storage unit 114 (step S127). In step S127, data indicating the ownership status of the data piece specified in step S121 is set to “present”.

  The communication processing unit 112 determines whether there is an unacquired data piece based on the management data stored in the management data storage unit 114 (step S129). If there is an unacquired data piece (step S129: Yes route), the process returns to step S121 to process the next data piece. On the other hand, when there is no unacquired data piece (step S129: No route), the communication processing unit 112 transmits a transfer completion notification to the management server 1c (step S131). Then, the process returns to the calling process.

  By executing the processing as described above, the amount of communication load generated in the network can be suppressed. Further, if each server acquires unacquired data pieces from neighboring servers, it is possible to prevent the processing load from being concentrated on a specific server.

[Embodiment 3]
Next, a third embodiment will be described. In the third embodiment, the connection type reception processing is different from the connection type reception processing of the first and second embodiments, and the other points are the same.

  The connection type reception process in the third embodiment will be described with reference to FIG. First, the communication processing unit 112 in the service processor 10 of each server obtains an unacquired data piece (that is, a data piece in which “none” is set) from the overall management data stored in the overall management data storage unit 113. Is specified (FIG. 29: step S141). An unacquired data piece is specified by management data stored in the management data storage unit 114.

  The communication processing unit 112 transmits an acquisition request including identification information of a data piece included in the service processor 10 among unacquired data pieces to the service processor 10 specified in step S141 (step S143).

  Thereafter, the communication processing unit 112 receives an unacquired data piece by connection-type communication, stores it in the data piece storage unit 115, and updates the management data storage unit 114 (step S145). In step S145, the data indicating the ownership status of the received data piece is set to “present”.

  The communication processing unit 112 determines whether there is an unacquired data piece based on the management data stored in the management data storage unit 114 (step S147). If there is an unacquired data piece (step S147: Yes route), the process returns to step S141 to process the next data piece. On the other hand, when there is no unacquired data piece (step S147: No route), the communication processing unit 112 transmits a transfer completion notification to the management server 1c (step S149). Then, the process returns to the calling process.

  By executing the processing as described above, it is possible to reduce the number of times connection-type communication is executed, and thus to suppress the amount of communication load generated on the network.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this. For example, the functional block configurations of the service processor 10 and the management server 1c described above may not match the actual program module configuration.

  In addition, the configuration of each data storage unit described above is an example, and the above configuration is not necessarily required. Further, in the processing flow, the processing order can be changed if the processing result does not change. Further, it may be executed in parallel.

  The connectionless type one-to-many communication may be multicast.

  The management servers 1c and 2c described above are computer devices, and are connected to a memory 2501, a CPU 2503, a hard disk drive (HDD: Hard Disk Drive) 2505, and a display device 2509 as shown in FIG. A display control unit 2507, a drive device 2513 for a removable disk 2511, an input device 2515, and a communication control unit 2517 for connecting to a network are connected by a bus 2519. An operating system (OS) and application programs for executing the processing in this embodiment are stored in the HDD 2505, and are read from the HDD 2505 to the memory 2501 when executed by the CPU 2503. The CPU 2503 controls the display control unit 2507, the communication control unit 2517, and the drive device 2513 according to the processing content of the application program, and performs a predetermined operation. Further, data in the middle of processing is mainly stored in the memory 2501, but may be stored in the HDD 2505. In the embodiment of the present invention, an application program for performing the above-described processing is stored in a computer-readable removable disk 2511 and distributed, and installed in the HDD 2505 from the drive device 2513. In some cases, the HDD 2505 may be installed via a network such as the Internet and the communication control unit 2517. Such a computer apparatus realizes various functions as described above by organically cooperating hardware such as the CPU 2503 and the memory 2501 described above and programs such as the OS and application programs. .

  The embodiment of the present invention described above is summarized as follows.

  In the data distribution method according to the first aspect of the present embodiment, (A) each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication, and (B) A first acquisition rate, which is a data piece acquisition rate, is calculated for each of the plurality of data pieces from information indicating whether each of the plurality of data pieces received from each of the plurality of destination devices is acquired. (C) If the first acquisition rate of each of the plurality of data pieces is larger than the threshold, an instruction to acquire an unacquired data piece from another destination device by connection-type communication is sent to the plurality of destinations. Includes processing to send to the device.

  In this way, it is possible to shorten the time required to distribute the data pieces while reliably acquiring each data piece.

  The data distribution method also includes: (D) a plurality of destinations corresponding to the total number of data pieces transmitted from information indicating whether or not each of the plurality of data pieces received from each of the plurality of destination devices has been acquired; A second acquisition rate, which is a ratio of the total number of data pieces acquired by the apparatus, is calculated. (E) When the second acquisition rate is equal to or less than a threshold, each of the plurality of data pieces is connected to a connectionless type pair. A process of transmitting to a plurality of destination devices by multi-communication may be further included. In this way, the number of executions of connection-type communication can be reduced, so that the time required for distribution can be shortened.

  In addition, in the data distribution method, (F) when the second acquisition rate is greater than the threshold and the first acquisition rate of one or more data pieces among the plurality of data pieces is less than or equal to the threshold, the first acquisition rate May further include a process of transmitting data pieces having a value equal to or less than a threshold value to a plurality of transmission destination devices by connectionless type one-to-many communication. In this way, the execution of connectionless type one-to-many communication can be minimized.

  In addition, this data distribution method (G) calculates the second acquisition rate and, prior to the calculation of the second acquisition rate, to a plurality of destination devices by connectionless type one-to-many communication. You may further include the process which calculates a threshold value from the 2nd acquisition rate calculated when each of several data piece was transmitted. In this way, the threshold value can be set to an appropriate value according to the actual second acquisition rate.

  The information processing system according to the second aspect of the present embodiment includes (H) a plurality of transmission destination devices and (I) an information processing device that transmits data pieces to the plurality of transmission destination devices. The information processing apparatus transmits (h1) each of the plurality of data pieces to the plurality of transmission destination apparatuses by connectionless type one-to-many communication, and (h2) receives the data pieces from each of the plurality of transmission destination apparatuses. From the information indicating whether or not each of the plurality of data pieces has been acquired, a first acquisition rate that is an acquisition rate of the data pieces is calculated for each of the plurality of data pieces, and (h3) When each first acquisition rate is larger than the threshold, an instruction to acquire an unacquired data piece from another destination device by connection-type communication is transmitted to a plurality of destination devices, Each of the transmission destination devices (i1), when receiving a data piece by connectionless type one-to-many communication, generates information indicating whether or not each of the plurality of data pieces has been acquired, and performs information processing. Send device, (i2) when receiving instruction from the information processing apparatus acquires unacquired data piece from the other destination device by the connection type communication.

  In this way, it is possible to reduce the time required to distribute the data pieces while ensuring that each transmission destination device acquires each data piece reliably.

  In addition, the instruction described above may include information about a data piece included in each device. Each of the plurality of transmission destination devices has (i21) a process of acquiring an unacquired data piece by connection-type communication, and the other having an unacquired data piece based on information about the data piece of each transmission destination device An unacquired data piece may be obtained from the nearest destination device among the destination devices. The communication load on the network can be reduced. In addition, it is possible to prevent the processing load from being concentrated on a specific destination device.

  Moreover, the instruction | indication mentioned above contains the information about the data piece which each apparatus has, and the number of the unacquired data pieces may be plural. Then, each of the plurality of destination devices has (i22) a process of acquiring an unacquired data piece by connection-type communication, and the like. An unacquired data piece may be acquired from a destination apparatus having the largest number of unacquired data pieces among the destination apparatuses. The number of executions of connection-type communication can be reduced, and the communication load on the network can be reduced.

  A program for causing the processor to perform the processing according to the above method can be created, and the program can be a computer-readable storage medium such as a flexible disk, a CD-ROM, a magneto-optical disk, a semiconductor memory, a hard disk, or the like. It is stored in a storage device. The intermediate processing result is temporarily stored in a storage device such as a main memory.

  The following supplementary notes are further disclosed with respect to the embodiments including the above examples.

(Appendix 1)
On the computer,
Each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication,
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. For
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
A data distribution program that executes processing.

(Appendix 2)
In the computer,
The total number of data pieces acquired by the plurality of destination devices with respect to the total number of data pieces transmitted from the information indicating whether or not each of the plurality of data pieces received from each of the plurality of destination devices is acquired. A second acquisition rate that is a percentage of
When the second acquisition rate is equal to or less than the threshold, each of the plurality of data pieces is transmitted to the plurality of destination devices by the connectionless type one-to-many communication.
The data distribution program according to appendix 1, which further executes processing.

(Appendix 3)
In the computer,
When the second acquisition rate is greater than the threshold and the first acquisition rate of one or more data pieces of the plurality of data pieces is equal to or less than the threshold, the first acquisition rate is equal to or less than the threshold. A data piece is transmitted to the plurality of destination devices by the connectionless type one-to-many communication;
The data distribution program according to appendix 2, which further executes processing.

(Appendix 4)
In the computer,
Prior to calculating the calculated second acquisition rate and the second acquisition rate, each of the plurality of data pieces is transmitted to the plurality of transmission destination devices by the connectionless type one-to-many communication. The threshold value is calculated from the second acquisition rate calculated at the time of transmission.
The data distribution program according to supplementary note 2 or 3, further causing the processing to be executed.

(Appendix 5)
Computer
Each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication,
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. For
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
A data distribution method that performs processing.

(Appendix 6)
A communication unit that transmits each of a plurality of data pieces to a plurality of destination devices by connectionless one-to-many communication;
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. A calculation unit for calculating
Have
The communication unit is
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
Information processing device.

(Appendix 7)
A plurality of destination devices;
An information processing device that transmits data pieces to the plurality of destination devices; and
Have
The information processing apparatus includes:
Transmitting each of the plurality of data pieces to the plurality of destination devices by connectionless one-to-many communication;
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. For
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
Each of the plurality of destination devices is
When a data piece is received by the connectionless type one-to-many communication, information indicating whether or not each of the plurality of data pieces has been acquired is generated and transmitted to the information processing apparatus,
When the instruction is received from the information processing apparatus, an unacquired data piece is acquired from another destination apparatus by the connection-type communication.
Information processing system.

(Appendix 8)
The instructions include information about data pieces that each destination device has,
Each of the plurality of transmission destination devices has the unacquired data piece based on information about the data piece of each transmission destination device in the process of acquiring the unacquired data piece by the connection-type communication. Obtaining the unacquired data piece from a destination device located closest to other destination devices;
The information processing system according to appendix 7.

(Appendix 9)
The instructions include information about data pieces that each destination device has,
The number of unacquired data pieces is plural,
Each of the plurality of transmission destination devices has the unacquired data piece based on information about the data piece of each transmission destination device in the process of acquiring the unacquired data piece by the connection-type communication. Obtaining the unacquired data piece from a destination device having the largest number of unacquired data pieces among other destination devices;
The information processing system according to appendix 7.

1s, 2s, 3s, 4s, 5s, 6s Server 50 Server system 1r, 2r, 3r, 4r Switch 1c, 2c Management server 10 Service processor 101 CPU
102 RAM 103, 104 Flash memory 105 LAN interface unit 20 IO board 201 FPGA 202 Flash memory 30 System board 301, 302, 303 CPU
1001 Communication processing unit 1002 Calculation unit 1003 Overall management data storage unit 1005 Overall acquisition rate storage unit 112 Communication processing unit 113 Overall management data storage unit 114 Management data storage unit 115 Data piece storage unit

Claims (6)

On the computer,
Each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication,
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. For
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
A data distribution program that executes processing. In the computer,
The total number of data pieces acquired by the plurality of destination devices with respect to the total number of data pieces transmitted from the information indicating whether or not each of the plurality of data pieces received from each of the plurality of destination devices is acquired. A second acquisition rate that is a percentage of
When the second acquisition rate is equal to or less than the threshold, each of the plurality of data pieces is transmitted to the plurality of destination devices by the connectionless type one-to-many communication.
The data distribution program according to claim 1, further causing the processing to be executed. In the computer,
When the second acquisition rate is greater than the threshold and the first acquisition rate of one or more data pieces of the plurality of data pieces is equal to or less than the threshold, the first acquisition rate is equal to or less than the threshold. A data piece is transmitted to the plurality of destination devices by the connectionless type one-to-many communication;
The data distribution program according to claim 2, further executing processing. In the computer,
Prior to calculating the calculated second acquisition rate and the second acquisition rate, each of the plurality of data pieces is transmitted to the plurality of transmission destination devices by the connectionless type one-to-many communication. The threshold value is calculated from the second acquisition rate calculated at the time of transmission.
The data distribution program according to claim 2 or 3, wherein the processing is further executed. Computer
Each of a plurality of data pieces is transmitted to a plurality of destination devices by connectionless type one-to-many communication,
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. For
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
A data distribution method that performs processing. A communication unit that transmits each of a plurality of data pieces to a plurality of destination devices by connectionless one-to-many communication;
From the information indicating whether each of the plurality of data pieces received from each of the plurality of transmission destination devices is obtained, a first acquisition rate that is an acquisition rate of the data pieces is determined for each of the plurality of data pieces. A calculation unit for calculating
Have
The communication unit is
If the first acquisition rate of each of the plurality of data pieces is greater than a threshold value, an instruction to acquire an unacquired data piece from another transmission destination device by connection-type communication is sent to the plurality of transmission destination devices. Send to
Information processing device.

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