摘要:
A computer-readable, non-transitory medium stores therein a search program that causes a computer having access to a data block set that includes data groups respectively registered in data blocks, and a Bloom filter row of n Bloom filters that each have m bits indicating negativity in a given number of the data blocks, to execute a process that includes receiving a transposition request for the Bloom filter row; transposing the Bloom filter row into a transposed Bloom filter row of m transposed Bloom filters respectively of n bits gathered from the Bloom filters according to arrangement position in the Bloom filters; and storing the transposed Bloom filter row to a storage device, if a transposition request has been received at the receiving.
摘要:
A memory area for storing the data for management of a page and a memory area for storing the data of the page itself are allowed to be distributed and allocated to separate caches. An access request for a storage module is received by a cache module managing the access request, and if a requested page is stored in another cache module, a responding process for the access request is performed jointly with the other cache module.
摘要:
The present invention relates to a system capable of carrying out efficient and stable system operation control even if a usage rate of the entire system varies under a situation in which the characteristics of storage units, such as maximum available total capacity and speed performance, are largely different from each other. Therefore, the system according to the present invention is composed of a monitor unit for monitoring information on a total volume of data stored in each of the storage units or in all the storage units, an index value calculating unit for calculating an index value on the basis of the monitor result and a location unit for distributively locating or relocating logical storage areas in physical storage areas on a plurality of storage units on the basis of the calculated index value.
摘要:
In a storage system, a plurality of RAID devices are connected to a network, and data is multiplexed to primary data and secondary data by being mirrored among the RAID devices. When a failure of a disk device that can be recovered within the devices owing to the RAID configuration occurs, data of a disk device corresponding to the failed disk device is requested to a RAID device that is its mirror target and the transferred data is written to a spare disk device for the recovery. At the time of the data recovery, an access right to a group of disk devices constituting RAID and an access right to individual disk devices are exclusively controlled with respect to an input and output of the primary data.
摘要:
The present invention relates to a system capable of carrying out efficient and stable system operation control even if a usage rate of the entire system varies under a situation in which the characteristics of storage units, such as maximum available total capacity and speed performance, are largely different from each other. Therefore, the system according to the present invention is composed of a monitor unit for monitoring information on a total volume of data stored in each of the storage units or in all the storage units, an index value calculating unit for calculating an index value on the basis of the monitor result and a location unit for distributively locating or relocating logical storage areas in physical storage areas on a plurality of storage units on the basis of the calculated index value.
摘要:
A number-of-slices collector collects number-of-slices information indicating the number of free slices, which are not assigned to a storage areas of a logical disk, from each of a plural disk nodes, divides the storage area of the corresponding storage device in units of slice, and stores an assignment relation of the slices with respect to the storage areas of the logical disk. A disk node selector selects a source disk node from among the disk nodes having the free slices, and requests a slice identifier to identify the free slice for the selected source disk node. The source disk node serves as a source providing the slice to be assigned. A slice assigner receives the slice identifier from the source disk node, and determines an assignment relation of the free slice, which is denoted by the received slice identifier, with respect to the storage areas of the logical disk.
摘要:
A computer executes a data allocation control program to control allocation of data in a plurality of disk nodes. A redundancy restoration module executes a redundancy restoration procedure by commanding disk nodes to create a new copy of redundancy-lost data. An error message reception module receives a write error message indicating a write error in a storage device during the redundancy restoration procedure and records an identifier of the faulty storage device in an error record memory. A copy command module identifies accessed data in the faulty storage device and commands a relevant disk node to create a copy of the identified data in the faulty storage device in the case where there is no redundant copy of the data.
摘要:
A storage device includes a S.M.A.R.T. information processor that periodically diagnoses physical and functional condition of the storage device and stores diagnostic information about the condition of the storage device in a magnetic disk and a storage unit. Upon receiving a request for the diagnostic information from a host computer, the S.M.A.R.T. information processor determines whether the magnetic disk is in standby mode. The S.M.A.R.T. information processor acquires the diagnostic information from the storage unit if the magnetic disk is in standby mode, and notifies the diagnostic information to the host computer.
摘要:
A surgical ultrasonic horn used in a surgical operation comprises a horn body and an end plate portion. Cutting portions are provided on an edge and an end of the end portion. A passage for irrigation solution extends in the horn body and the end plate portion. At least one bore opens at the cutting portions by a jet angle of 5.degree. to 90.degree. in respect of a plane of the end plate portion. The irrigation solution passage communicates with the bore, thereby the irrigation solution is sprayed therethrough.
摘要:
An ultrasonic surgical apparatus for crushing, sucking and removing undesirable substances inside the body such as an ulcerous tissue, thrombus and calcium clod by means of mechanical vibrations of a flexible ultrasonic probe (17). The surgical apparatus comprises a horn (5) connected to an ultrasonic vibration source (4) and adapted to transmit and amplify mechanical vibrations of an ultrasonic frequency, an ultrasonic probe (17) including a flexible linear transmitting member (44) having a working portion (21) adapted to effect mechanical vibration of an ultrasonic frequency, a horn cover (6) at least a portion of which is made of a flexible material, and a flexible tube (8) having three inner holes and three branch tubes communicating with the inner holes and connected to the horn cover (6) through the one branch tube (7). The ultrasonic probe (17) is disposed in one of the inner holes (20) communicated with the latter one branch tube (7), and a suction device (11) and a liquid injector (14) are connected to two of the branch tubes.