Patent application number | Description | Published |
20080252309 | Method and apparatus for generating an EMI fingerprint for a computer system - A system that generates an electromagnetic interference (EMI) fingerprint for a computer system is presented. During operation, the system executes a load script on the computer system, wherein the load script includes a specified sequence of operations. Next, the system receives EMI signals generated by the computer system while executing the load script. The system then generates the EMI fingerprint from the received EMI signals. | 10-16-2008 |
20080255819 | High-accuracy virtual sensors for computer systems - Embodiments of the present invention provide a system that estimates the value of a virtual sensor. The system first samples values for performance metrics using external sensors that are coupled to a system and internal sensors that are built into the system. Next, the system generates an inferential sensing model for the system from the sampled values. Then, during operation, the system samples values of performance metrics using the internal sensors and uses the inferential sensing model and the sampled values from the internal sensors to estimate the values of performance metrics for removed external sensors (i.e., virtual sensors). | 10-16-2008 |
20080256398 | Using EMI signals to facilitate proactive fault monitoring in computer systems - A system that monitors electromagnetic interference (EMI) signals to facilitate proactive fault monitoring in a computer system is presented. During operation, the system receives EMI signals from one or more antennas located in close proximity to the computer system. The system then analyzes the received signals to proactively detect anomalies during operation of the computer system. | 10-16-2008 |
20080257046 | Built-in swept-sine testing for a computer system to assure vibrational integrity - Embodiments of the present invention provide a system that performs vibration testing in a computer system. The system starts by generating a vibration at a predetermined frequency in a computer system. The system then determines if the computer system has a resonance at the predetermined frequency. If so, the system adjusts an operating parameter of at least one computer system component to prevent the computer system component from vibrating at or near a resonance frequency. | 10-23-2008 |
20090009960 | METHOD AND APPARATUS FOR MITIGATING DUST-FOULING PROBLEMS - Embodiments of the present invention provide a system for preventing dust-fouling in a computer system. During operation of the computer system, the system monitors the computer system and determines if the computer system is becoming dust-fouled. If so, the system reverses fans in the computer system to circulate air through the computer system in the opposite direction to dislodge and disperse dust from the computer system. | 01-08-2009 |
20090013789 | Acoustic sensor for proactive fault monitoring in computer systems - Embodiments of the present invention provide a system for detecting vibrations from a component. The system operates by coupling vibrations from a component to a membrane using a flexible connecting line. The membrane converts the vibrations into acoustic waves that are transmitted through a medium. Finally, a microphone detects the acoustic waves in the medium and converts the acoustic waves into electrical signals. | 01-15-2009 |
20090015241 | METHOD AND APPARATUS FOR SENSING AND CONTROLLING FAN SPEED - One embodiment of the present invention provides a system that determines fan speeds for a set of fans in a computer system. During operation, the system receives time-series data collected by a vibration transducer associated with the computer system, wherein the vibration transducer is configured to record mechanical vibrations from the set of fans. Next, the system performs a spectral analysis on the time-series data to obtain frequency peaks associated with fan speeds for individual fans in the set of fans. The system then identifies fan speeds for the individual fans in the set of fans from the frequency peaks. | 01-15-2009 |
20090067080 | SELECTIVELY MITIGATING MULTIPLE VIBRATION SOURCES IN A COMPUTER SYSTEM - One embodiment of the present invention provides a system that mitigates the effects of multiple vibration sources on a set of hard disk drives (HDDs) within a computer system. During operation, the system identifies a target HDD in the set of HDDs, wherein the performance of the target HDD is affected by mechanical vibrations. The system also identifies one or more primary vibration sources from the multiple vibration sources that affect the performance of the target HDD. Next, for each of the primary vibration sources, the system measures a first time-domain signal associated with the operation of the primary vibration source using a first vibration transducer associated with the primary vibration source. The system also measures a second time-domain signal associated with the target HDD using a second vibration transducer associated with the target HDD. Next, for each of the primary vibration sources, the system then computes a cross-power-spectral-density (CPSD) between the first and the second time-domain signals. The system then selectively mitigates the primary vibration sources based on the CPSDs between the primary vibration sources and the target HDD. | 03-12-2009 |
20090106521 | MULTIVALUE STATISTICAL COMPRESSION OF TELEMETRIC TIME SERIES DATA IN A BOUNDED STORAGE FOOTPRINT - Some embodiments of the present invention provide a system that stores telemetry data from a computer system. The system includes a first buffer, a second buffer, and a third buffer. During operation, the system periodically obtains the telemetry data from the computer system and stores the telemetry data in the first buffer, second buffer, and third buffer. The system also compresses the telemetry data in the first and second buffers. To compress the data, the system creates a first set of summary statistics from the telemetry data in the first buffer and the second buffer and stores the first set of summary statistics in the first buffer, which becomes a historical data buffer. | 04-23-2009 |
20090135514 | METHOD AND APPARATUS FOR REDUCING COUPLED HARD DISK DRIVE VIBRATION - Some embodiments of the present invention provide a system that includes a first hard disk drive (HDD) and a second HDD. Within this system, the first HDD is coupled to the second HDD in a non-parallel configuration, which reduces rotational vibration transmitted between the first HDD and the second HDD. | 05-28-2009 |
20090150324 | Accurately inferring physical variable values associated with operation of a computer system - One embodiment of the present invention provides a system that monitors a physical variable associated with an electronic component within a computer system. During operation, the system receives telemetry signals of the physical variable which are collected by one or more physical sensors associated with the electronic component. The system also collects electromagnetic interference (EMI) signals generated by the electronic component. Next, the system builds an inferential model for the physical variable by correlating the EMI signals with the telemetry signals. The system then uses the inferential model to infer values for the physical variable from the EMI signals. | 06-11-2009 |
20090195922 | METHOD AND APPARATUS FOR ACTIVELY CANCELING VIBRATIONS IN A COMPUTER SYSTEM - One embodiment of the present invention provides a system actively cancels vibrations in a computer system. During operation, the system monitors vibrations in the computer system. Next, the system analyzes the vibrations to identify one or more harmonics in the vibrations. The system then actively cancels one or more of the identified harmonics. | 08-06-2009 |
20090204839 | METHOD AND APPARATUS FOR CONTROLLING THE TEMPERATURE OF A POWER SUPPLY IN A COMPUTER SYSTEM - A system that controls the temperature of a power supply in a computer system is presented. A state of the computer system is monitored. Next a signal is generated in response to the state of the computer system. The signal is then used to control the temperature of the power supply. | 08-13-2009 |
20090206842 | METHOD AND APPARATUS FOR DETERMINING WHETHER A COOLING DEVICE IN A COMPUTER SYSTEM IS RESPONSIVE TO CONTROL SIGNALS - Some embodiments of the present invention provide a system that determines whether a cooling device in a computer system is responsive to control signals. During operation of the computer system, a control signal is sent to the cooling device. Next, a response of the computer system to the control signal is measured, wherein the response includes a temperature profile. The frequency content of the control signal is then compared to the frequency content of the temperature profile to determine whether the cooling device is responsive to the control signal. | 08-20-2009 |
20090259347 | METHOD AND APPARATUS FOR CONTROLLING TEMPERATURE VARIATIONS IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that controls temperature variations in a computer system. During operation, a telemetry variable of the computer system is monitored. Next, a future temperature of the computer system is predicted based on the telemetry variable. A signal is then generated in response to the future temperature. Then, the signal is sent to a cooling device in the computer system to control temperature variations of the computer system. | 10-15-2009 |
20090271049 | ASSURING STABILITY OF THE SPEED OF A COOLING FAN IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that assures stability of the speed of a cooling fan in a computer system. During operation, a temperature of the computer system, an ambient temperature, and a current fan speed for the cooling fan are monitored. Next, a validated ambient temperature based on parameters including the temperature of the computer system, the ambient temperature, and the current fan speed is computed. Then, a control signal is generated in response to the validated ambient temperature, and the control signal is sent to the cooling fan to assure stability of the fan speed of the cooling fan. | 10-29-2009 |
20090271141 | WORKLOAD SCHEDULING IN MULTI-CORE PROCESSORS - A computer system that schedules loads across a set of processor cores is described. During operation, the computer system receives thermal measurements from sensors associated with the set of processor cores, and removes noise from the thermal measurements. Then, the computer system analyzes thermal properties of the set of processor cores based on the thermal measurements. Next, the computer system receives a process to be executed, and schedules the process to be executed by at least one of the processor cores based on the analysis. This scheduling is performed in a manner that reduces spatial and temporal thermal variations in the integrated circuit. | 10-29-2009 |
20090271145 | DETERMINING A CENTER OF ROTATION FOR A COMPONENT IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that determines a center of rotation for a component in a computer system. During operation, the system measures a first acceleration of a first location on the component and a second acceleration of a second location on the component, wherein the first location and the second location are separated by a predetermined distance. Then, the system determines the center of rotation using the first acceleration, the second acceleration, and the predetermined distance. | 10-29-2009 |
20090300244 | MONITORING A CONNECTION IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that monitors a connection in a computer system between a connector and a component coupled to the connector. During operation, a first motion parameter of the connector, and a second motion parameter of the component are measured. Then, the connection is monitored by comparing information related to the first motion parameter and information related to the second motion parameter. | 12-03-2009 |
20090303632 | SCHEDULING SPIN-UP OPERATIONS FOR A SET OF HARD DISK DRIVES - Some embodiments of the present invention provide a system for scheduling spin-up operations for a set of hard disk drives (HDDs) in a computer system. During operation, the system determines an available power of the computer system. Next, one or more HDDs are selected from the set of HDDs to be spun-up based on the available power and the power required to spin up each HDD. Then, spin-up operations are scheduled for the selected HDDs. | 12-10-2009 |
20090306920 | COMPUTER SYSTEM WITH INTEGRATED ELECTROMAGNETIC-INTERFERENCE DETECTORS - Embodiments of a system that determines a condition associated with an integrated circuit disposed on a circuit board are described. During operation, the system receives electromagnetic-interference (EMI) signals from one or more antennas while the integrated circuit is operating, where the one or more antennas are disposed on the circuit board. Then, the system analyzes the received EMI signals to determine the condition. | 12-10-2009 |
20100004900 | ROTATIONAL VIBRATION MEASUREMENTS IN COMPUTER SYSTEMS - Embodiments of a mechanical device to facilitate in-situ measurements of vibration associated with a corresponding component in a computer system are described. This mechanical device includes a housing that has approximately a same mass as the component, approximately a same distribution of mass about a geometric center of the component, and approximately a same form factor as the component. Moreover, the mechanical device includes one or more vibration sensors, which are mechanically coupled to the housing, and which are configured to perform the in-situ vibration measurements. | 01-07-2010 |
20100005237 | SCHEDULING READ OPERATIONS DURING DRIVE RECONSTRUCTION IN AN ARRAY OF REDUNDANT DISK DRIVES - Some embodiments of the present invention provide a system that schedules read operations for disk drives in a set of disk drives. During operation, the system monitors a write rate for write operations to a given disk drive in the set of disk drives, wherein vibrations generated by the read operations directed to disk drives in the set of disk drives are transmitted to the given disk drive. Then, the read operations for disk drives in the set of disk drives are scheduled based on the write rate for the given disk drive, thereby limiting interference between the write operations and the vibrations generated by the read operations. | 01-07-2010 |
20100020438 | MULTI-DIMENSIONAL HARD DISK DRIVE VIBRATION MITIGATION - Some embodiments of the present invention provide a system that includes a drive carrier for a hard disk drive (HDD) and one or more vibration control clips affixed to the drive carrier. Within this system, a mode of vibration of the HDD is modulated by contact between each of the vibration control clips and a surface within the computer system. | 01-28-2010 |
20100023282 | CHARACTERIZING A COMPUTER SYSTEM USING RADIATING ELECTROMAGNETIC SIGNALS MONITORED THROUGH AN INTERFACE - Some embodiments of the present invention provide a system that characterizes a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system. First, the target electromagnetic signal is monitored using a conductor in an interface of the computer system. Then, the target electromagnetic signal is analyzed to characterize the computer system parameter. | 01-28-2010 |
20100023295 | ESTIMATING THE AMBIENT TEMPERATURE OF AIR OUTSIDE OF A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that estimates an ambient temperature of air outside of a computer system. During operation, a temperature inside the computer system is measured for different flow rates of air into the computer system. Next, the temperature measurements are used to determine a relationship between the temperature inside the computer system and a parameter related to the flow rate of air into the computer system. Then, the ambient temperature of air outside the computer system is estimated based on the relationship. | 01-28-2010 |
20100023614 | SERVER LOCATION MAPPING - Embodiments of a method for determining locations of computers in a group of computers, which may be performed by a system, are described. During operation, the system receives a location of a first computer in the group of computers. Then, the system determines locations of one or more additional computers in the group of computers relative to the first computer based on vibration spectra associated with the first computer and the one or more additional computers. | 01-28-2010 |
20100023787 | CONTROLLING THE POWER UTILIZATION OF A COMPUTER SYSTEM BY ADJUSTING A COOLING FAN SPEED - Some embodiments of the present invention provide a system that controls a power utilization of a computer system by adjusting a cooling fan speed. During operation, a relationship between information related to the cooling fan speed and the power utilization is determined. Then, the cooling fan speed is adjusted based on the determined relationship to control the power utilization of the computer system. | 01-28-2010 |
20100024555 | Controlling a device that generates vibrations in a computer system - Some embodiments of the present invention provide a system that controls a device that generates vibrations in a computer system. During operation, a critical vibration frequency is determined for the computer system. Next, a keep-out zone is generated based on the critical vibration frequency, wherein the keep-out zone specifies a range of frequencies to be avoided. Then, the device is controlled based on the keep-out zone to reduce vibrations generated by the device in the keep-out zone. | 02-04-2010 |
20100030394 | METHOD AND APPARATUS FOR REGULATING TEMPERATURE IN A COMPUTER SYSTEM - Embodiments of a system for regulating temperature in a computer system are described. During operation, the system estimates a thermal trajectory as a function of time in at least a portion of the computer system. Then, the system modifies a flow resistance of a cooling mechanism in a thermal-regulation system in the computer system based on the estimated thermal trajectory, where the flow resistance is modified to regulate a temperature of at least the portion of the computer system. | 02-04-2010 |
20100036620 | SIMULATING A VIBRATION PATTERN IN A COMPUTER SUBSYSTEM - Some embodiments of the present invention provide a system that generates a simulated vibration pattern in a computer subsystem. During operation, a vibration pattern is monitored at a location in the computer subsystem, wherein the vibration pattern is monitored while the computer subsystem is incorporated into the computer system and the computer system is operating. Then, the vibrations of the computer subsystem are mimicked by generating the simulated vibration pattern at the same location in the computer subsystem based on the monitored vibration pattern. | 02-11-2010 |
20100036621 | Characterizing the response of a computer system component to vibrations - Some embodiments of the present invention provide a system that characterizes a response of a component in a computer system to vibrations generated by the computer system. First, the system measures the response of the component to vibrations in a frequency range while the component is located outside of the computer system. The system also measures vibrations generated by the computer system in the frequency range during operation of the computer system, wherein the vibrations are measured at a location in the computer system which is configured to receive the component. The system then characterizes the response of the component to vibrations generated by the computer system based on the measured response of the component to vibrations in the frequency range and the measured vibrations in the frequency range at the location. | 02-11-2010 |
20100037078 | TECHNIQUE FOR REGULATING POWER-SUPPLY EFFICIENCY IN A COMPUTER SYSTEM - Embodiments of a system for regulating an efficiency of a power supply in a computer system are described. During operation, the system measures an output load of the power supply using one or more telemetry monitors in the computer system. Then, the system determines if an efficiency of the power supply corresponding to the measured output load is within a predetermined range that includes an optimal efficiency of the power supply. If the efficiency is outside of the predetermined range, the system performs remedial action so that the power supply operates at an adjusted efficiency that falls within the predetermined range. | 02-11-2010 |
20100057383 | GENERATING A COMPOSITE VIBRATION PROFILE FOR A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that generates a composite vibration profile in a frequency range for a computer system. First, a vibration spectrum in the frequency range is measured for a test computer system in each configuration in a set of configurations. Then, the composite vibration profile for the computer system is generated based on the measured vibration spectra. | 03-04-2010 |
20100058092 | METHOD FOR CHARACTERIZING THE HEALTH OF A COMPUTER SYSTEM POWER SUPPLY - Some embodiments of the present invention provide a system that controls a device that characterizes the health of a computer system power supply. During operation, a signature for the power supply is generated based on measurements of a set of performance parameters for the power supply. Then, the health of the power supply is characterized based on a comparison between the signature for the power supply and signatures for one or more other power supplies. | 03-04-2010 |
20100064170 | PROLONGING THE REMAINING USEFUL LIFE OF A POWER SUPPLY IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that prolongs a remaining useful life of a power supply in a computer system. First, performance parameters of the power supply are monitored. Next, the remaining useful life of the power supply is predicted based on the monitored performance parameters. Then, an operational regime of the power supply is adjusted based on the predicted remaining useful life to prolong the remaining useful life. | 03-11-2010 |
20100070210 | DETECTING CONSTRAINED MOTION OF A COMPONENT IN A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that detects the presence of constrained motion in one or more components in a computer system. First, a vibrational spectrum of the computer system is monitored while the computer system operates. Then, the vibrational spectrum is analyzed using a pattern-recognition model to detect constrained motion in one or more components in the computer system, wherein the pattern-recognition model classifies the vibrational spectrum as indicating constrained motion or as not indicating constrained motion. | 03-18-2010 |
20100110857 | CHARACTERIZING THE PERFORMANCE OF A DISK DRIVE ACROSS A RANGE OF VIBRATION FREQUENCIES - Some embodiments of the present invention provide a system that characterizes the performance of a disk drive at frequencies in a set of frequencies in a frequency range. First, the disk drive is vibrated at each frequency in the set of frequencies, one frequency at a time. During this process, a disk drive performance metric is monitored. Next, the performance of the disk drive is characterized by determining the parameter related to acceleration due to the vibrations for each frequency at which a disk drive performance metric degrades by a predetermined amount from a baseline. | 05-06-2010 |
20100121788 | GENERATING A UTILIZATION CHARGE FOR A COMPUTER SYSTEM - Some embodiments of the present invention provide a system that generates a utilization charge for a computer system. First, a set of performance parameters of the computer system are monitored. Next, a power utilization of the computer system is inferred based on the set of performance parameters and a power-utilization model. Then, a utilization charge is generated based on the power utilization of the computer system. | 05-13-2010 |
20100142136 | METHOD AND APPARATUS THAT ISOLATES A COMPUTER SYSTEM FROM VIBRATIONS GENERATED BY INTERNAL FANS - Some embodiments of the present invention provide an apparatus that isolates a computer system from vibrations generated by one or more fans inside the computer system. The apparatus includes a fan deck upon which the one or more fans are mounted inside the computer system, and three spring assemblies. Each spring assembly includes: a pin that extends through a clearance hole in the fan deck, wherein a first end of the pin is rigidly coupled to the computer system; a lower spring that extends between a first side of the fan deck and a lower spring mount coupled to the pin; and an upper spring that extends between a second side of the fan deck and a upper spring mount coupled to the pin. | 06-10-2010 |
20100161525 | ANALYZING A TARGET ELECTROMAGNETIC SIGNAL RADIATING FROM A COMPUTER SYSTEM - One embodiment of the present invention provides a system that characterizes a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system. First, the system monitors the target electromagnetic signal using a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system. The system also monitors the target electromagnetic signal using a second directional antenna located outside of the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna, and wherein the second directional antenna is directed at the location inside the computer system. Next, the system characterizes the computer system parameter based on the target electromagnetic signal received from the first antenna and the target electromagnetic signal received from the second antenna. Then, the system generates a request for an action based on the characterization of the computer system. | 06-24-2010 |
20100217543 | GENERATING A VIBRATION PROFILE FOR A ROTATING COOLING DEVICE IN A COMPUTER SYSTEM - One embodiment of the present invention provides a system that generates a vibration profile for a rotational device in a computer system. During operation, the system sequentially sweeps a rotation speed of a rotational device over a range of rotation speeds. While driving the rotational device at each rotation speed, the system collects a time-domain vibration signal produced by the rotational device and subsequently computes a frequency spectrum of the time-domain vibration signal. In this way, the system generates a set of frequency spectra associated with the range of rotation speeds. Next, the system combines the set of frequency spectra to generate a composite vibration profile for the rotational device. | 08-26-2010 |
20100284781 | MITIGATING MECHANICAL VIBRATIONS CAUSED BY A FAN IN A COMPUTER SYSTEM - One embodiment provides a system that mitigates vibrations caused by cooling fans in a computer system. More specifically, the system includes a cooling fan mechanically coupled to the chassis of the computer system, wherein vibrations generated by the cooling fan are coupled to the chassis. The system also includes an actuation mechanism that creates a relative displacement between the cooling fan and the chassis when a control signal is applied to the actuation mechanism. The system additionally includes a detection mechanism which detects the relative displacement and generates a feedback signal which represents the relative displacement. The system further includes a control signal generation mechanism which converts the feedback signal into the control signal, which is subsequently applied to the actuation mechanism. When the control signal is applied to the actuation mechanism, the relative displacement between the cooling fan and the chassis vibrationally decouples the cooling fan from the chassis. | 11-11-2010 |
20100290144 | INVARIANT MULTI-DIMENSIONAL VIBRATION-RESILIENCE-SIGNATURE GENERATION SYSTEM - One embodiment of the present invention provides a system that generates vibration-resistance signatures for hard disk drives (HDDs). In this system, a set of HDDs is mechanically affixed to a disk enclosure. The system additionally includes a vibration generator which is mechanically coupled to the disk enclosure and can apply a translational vibration profile to the disk enclosure. The system further includes a coupling mechanism between the set of HDDs and the disk enclosure which translates the translational vibration profile into both translational and rotational vibrations for the set of HDDs in multiple dimensions. The system additionally includes a monitoring mechanism which monitors an HDD performance metric from the set of HDDs while the HDDs are subject to the translational and rotational vibrations. The system also includes a signature-generation mechanism which uses the monitored HDD performance metric to generate vibration-resistance signatures for the set of HDDs. | 11-18-2010 |
20100292959 | Telemetry data analysis using multivariate sequential probability ratio test - One embodiment provides a system that analyzes telemetry data from a monitored system. During operation, the system periodically obtains the telemetry data as a set of telemetry variables from the monitored system and updates a multidimensional real-time distribution of the telemetry data using the obtained telemetry variables. Next, the system analyzes a statistical deviation of the multidimensional real-time distribution from a multidimensional reference distribution for the monitored system using a multivariate sequential probability ratio test (SPRT) and assesses the integrity of the monitored system based on the statistical deviation of the multidimensional real-time distribution. If the assessed integrity falls below a threshold, the system determines a fault in the monitored system corresponding to a source of the statistical deviation. | 11-18-2010 |
20100296383 | REDUCED ENERGY CONSUMPTION USING ACTIVE VIBRATION CONTROL - Embodiments of a computer system that includes a vibration-cancelling mode, and a related method and computer-program product (e.g., software) for use with the computer system, are described. During operation, a processor monitors operations in the computer system, and may select either the vibration-cancelling mode or an inactive mode based on the monitored operations. For example, the processor may select the vibration-cancelling mode when there are input/output-(I/O) intensive workloads to an array of one or more hard disk drives (HDDs) in the computer system. In this way, the processor may reduce the energy consumption associated with vibration-induced retries to the HDDs (and reduced I/O throughput) without increasing the energy consumption associated with active vibration damping at other times, such as when the computer system is idle or during processor-intensive workloads. | 11-25-2010 |
20100324882 | ESTIMATING BALL-GRID-ARRAY LONGEVITY IN A COMPUTER SYSTEM - A method for generating a service action for a computer system is described. During the method, a longevity index value for a packaging technology (such as solder joints in a BGA) in the computer system is calculated using thermal and vibration telemetry data (which is collected in the computer system) and a longevity model. This longevity model may be based on accelerated failure testing of the packaging technology, field failures of the packaging technology in a group of computer systems (which includes the computer system) and/or thermal and vibration telemetry data for the group of computer systems. Furthermore, using the longevity index value, the service action for the computer system is determined. Based on the longevity index value, remedial action (such as repairs to the computer system) may be scheduled and performed. | 12-23-2010 |
20100332185 | ANALYTICAL BANDWIDTH ENHANCEMENT FOR MONITORING TELEMETRIC SIGNALS - Some embodiments provide a system that analyzes telemetry data from a monitored system. During operation, the system obtains the telemetry data as a set of telemetric signals from the monitored system and groups the telemetry data into one or more clusters of correlated telemetric signals from the telemetric signals. Next, the system increases a bandwidth associated with monitoring the telemetric signals. To increase the bandwidth, the system omits one or more of the correlated telemetric signals from each of the clusters during sampling of the telemetric signals and estimates the omitted correlated telemetric signals by applying a nonlinear, nonparametric regression technique to the sampled telemetric signals. | 12-30-2010 |
20100332189 | EMBEDDED MICROCONTROLLERS CLASSIFYING SIGNATURES OF COMPONENTS FOR PREDICTIVE MAINTENANCE IN COMPUTER SERVERS - Some embodiments of the present invention provide a system that analyzes data from a computer system. During operation, the system obtains the sensor data from a component in the computer system using a set of sensors. Next, the system transmits the sensor data to a microcontroller unit (MCU) coupled to the sensors and stores the sensor data in internal memory of the MCU. Finally, the system assesses the integrity of the component by analyzing the sensor data using a pattern-recognition apparatus in the MCU. | 12-30-2010 |
20120272019 | SCHEDULING READ OPERATIONS DURING DRIVE RECONSTRUCTION IN AN ARRAY OF REDUNDANT DISK DRIVES - Some embodiments of the present invention provide a system that schedules read operations for disk drives in a set of disk drives. During operation, the system monitors a write rate for write operations to a given disk drive in the set of disk drives, wherein vibrations generated by the read operations directed to disk drives in the set of disk drives are transmitted to the given disk drive. Then, the read operations for disk drives in the set of disk drives are scheduled based on the write rate for the given disk drive, thereby limiting interference between the write operations and the vibrations generated by the read operations. | 10-25-2012 |
20130054809 | PREVENTING OSCILLATORY LOAD BEHAVIOR IN A MULTI-NODE DISTRIBUTED SYSTEM - The disclosed embodiments provide a system that prevents oscillatory load behavior for a multi-node distributed system. During operation, the system uses a load-balancing policy to distribute requests to nodes of the distributed system. The system determines operational characteristics for the nodes as they process a set of requests, and then uses these operational characteristics to compute machine queuing models that describe the machine state of each node. The system then uses this machine state for the nodes to determine whether the load-balancing policy and the distributed system are susceptible to oscillatory load behavior. | 02-28-2013 |
20130090889 | DYNAMIC REGULATION OF TEMPERATURE CHANGES USING TELEMETRY DATA ANALYSIS - The disclosed embodiments provide a system that analyzes telemetry data from a computer system. During operation, the system obtains the telemetry data as a set of telemetric signals using a set of sensors in the computer system. Next, the system uses a regularization technique to calculate a temperature derivative with respect to time for a component in the computer system from the telemetric signals. Finally, the system controls a subsequent value of the temperature derivative with respect to time by modulating a fan speed in the computer system based on the calculated temperature derivative with respect to time and the telemetric signals. | 04-11-2013 |
20140067773 | TRANSIENT DETECTION FOR PREDICTIVE HEALTH MANAGEMENT OF DATA PROCESSING SYSTEMS - Systems, methods, and other embodiments associated with transient detection for predictive health management are described. In one embodiment, a method includes receiving a health signal from a data outlet. The health signal corresponds to a derivative variable derived from a combination of data processing system metrics not exposed beyond the data outlet. A transient is detected in the health signal. In response to detecting the transient, the method includes performing a corrective action. The example method may also include detecting the transient in a health signal from a data processing system by collecting historical values of the health signal; selecting a first statistical model that best fits the historical values; receiving a present value of the health signal; and applying the first statistical model to the present value of the health signal to determine whether the present value of the health signal is a transient. | 03-06-2014 |
20140122692 | DIAGNOSTICS INFORMATION EXTRACTION FROM THE DB SIGNALS WITH MEASURELESS PARAMETERS - In general the invention relates to a method for processing signals from a data server. The method includes obtaining, by a monitoring facility, a measured signal from the data server, wherein the monitoring facility comprises a central processing unit, generating a first probing characteristic from the measured signal, and determining that the first probing characteristic is measureless. The method further includes decomposing, by the central processing unit in response to the determination, the first probing characteristic into a plurality of component parts, constructing a reconstructed signal using a first one of the plurality of component parts, generating a second probing characteristic using the reconstructed signal, wherein the second probing characteristic is not measureless, and processing the reconstructed signal by the monitoring facility. | 05-01-2014 |
20140143182 | SIMILARITY ANALYSIS WITH TRI-POINT DATA ARBITRATION - Systems, methods, and other embodiments associated with similarity analysis using tri-point arbitration are described. In one embodiment, a method includes selecting a data point pair and an arbiter point from a data set. A tri-point arbitration coefficient (ρTAC) is calculated for data point pairs based, at least in part, on a distance between the first and second data points and the arbiter point. A similarity metric is determined for the data set based, at least in part, on an aggregation of tri-point arbitration coefficients for data point pairs in the set of data points using the selected arbiter point. | 05-22-2014 |
20140280146 | PER-ATTRIBUTE DATA CLUSTERING USING TRI-POINT DATA ARBITRATION - Systems, methods, and other embodiments associated with clustering using tri-point arbitration are described. In one embodiment, a method includes selecting a data point pair and a set of arbiter points. A tri-point arbitration similarity is calculated for data point pairs based, at least in part, on a distance between the first and second data points and the arbiter points. In one embodiment, similar data points are clustered. | 09-18-2014 |
20140280860 | METHOD AND SYSTEM FOR SIGNAL CATEGORIZATION FOR MONITORING AND DETECTING HEALTH CHANGES IN A DATABASE SYSTEM - A method for generating instructions for a monitoring facility. The method includes obtaining a signal from a data server, where the data server is monitored by the monitoring facility using a task, identifying a signal characteristic of the signal, and determining a first category for the signal based on the signal characteristic. The method further includes identifying a first signal processing tool for the signal based on the task and the first category and instructing the monitoring facility to perform the task by applying the first signal processing tool to the signal. | 09-18-2014 |
20140281738 | METHOD AND SYSTEM FOR KEY PERFORMANCE INDICATORS ELICITATION WITH INCREMENTAL DATA DECYCLING FOR DATABASE MANAGEMENT SYSTEM - A method for processing signals from a data server system including generating, by a monitoring module on a monitoring facility, a plurality of frequency data items, where the monitoring facility comprises a central processing unit, obtaining, by the monitoring module, a first signal value from the data server system, where the signal value is a measurement of an element of the data server system, and calculating a plurality of fit errors for the plurality of frequency data items using the first signal value. The method further includes selecting a frequency data item of the plurality of frequency data items with a lowest fit error to obtain a selected frequency data item, removing a cyclic component of the first signal value using the selected frequency data item to obtain a first processed signal value, and displaying the first processed signal value on a graph. | 09-18-2014 |