Collecting and analyzing surface wound data

Determining system performance

A method of determining system performance in a system that comprises one or more components and a monitoring element where the components may be components such as a processing device and or storage. For the or each component the method includes steps of determining a maximum achievable performance for a component for a specific metric, determining a maximum performance for the component for the specific metric given the current system configuration, determining a current performance for the component for the specific metric, and providing the determined performance measurements to the monitoring element. Determining of performance measurements may be repeated for a given component for a different metric. A visual indication combining the determined performance measurements may be displayed including for multiple metrics of a given component.

METHOD AND APPARATUS FOR COLLECTING AND ANALYZING SURFACE WOUND DATA

A 3D surface wound, injury, and personal protective equipment (PPE) data entry system provides an easily usable graphical user interface through which an examiner can objectively record data relating to surface wounds and injuries sustained by a subject human, as well as PPE used when the wounds/injuries were sustained. The system includes a 3D human model onto which the examiner draws the surface wound(s) and/or damage to the PPE. The subject human's record is stored in a database of similar records. The database records comprise quantifiable, objective data that is easily compared and analyzed. An analysis tool can aggregate a selected population of human subjects within the database to create wound density information that can be statistically analyzed and/or displayed on a standard 3D human model. Such objective wound density information may facilitate improved medical and/or tactical training, and improved PPE design.

Protecting Storage Fabrics from Errant Device Causing Single Point of Failure

A mechanism is provided for protecting storage fabrics from an errant device causing a single point of failure. The mechanism identities a source of the out-of-context traffic, isolates the TAG to prevent further catastrophe, and ensures that device isolation control operations are processed timely allowing device isolation and removing the source of the issue. Should device isolation not solve the issue, the mechanism allows the host to use a binary search method to isolate the device that may be hiding its true identity and sourcing possibly malicious traffic. 1. A method , in a controlling device in a storage fabric , for protecting the storage fabric from an errant device causing a single point of failure , the method comprising:responsive to receiving from a failing device an out-of-context frame at the controlling device, identifying a TAG identifier associated with the out-of-context frame;removing, by the controlling device, the TAG identifier as a candidate for reuse;starting, by the controlling device, an isolation timer associated with the TAG identifier; andresponsive to expiration of the isolation timer, returning, by the controlling device, the TAG identifier as a candidate for reuse.2. The method of claim 1 , further comprising:notifying a host device that initiated an IO operation associated with the TAG identifier of an out-of-context frame event associated with the TAG identifier.3. The method of claim 2 , further comprising:dedicating, by the controlling device, internal resources to respond to a request from the host device to isolate the failing device from the storage fabric.4. The method of claim 3 , wherein the host device isolates the failing device by zoning off the failing device and turning off a link to the failing device.5. The method of claim 3 , wherein responsive to the host device receiving a subsequent out-of-context frame event associated with the failing device claim 3 , the host device performs a binary search to identify the ...

AUTOMATED SELECTION OF FUNCTIONS TO REDUCE STORAGE CAPACITY BASED ON PERFORMANCE REQUIREMENTS

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics. 18-. (canceled)9. A system , comprising:a memory; anda processor coupled to the memory, wherein the processor performs operations, the operations comprising: computing statistics on growth rate of data and access characteristics of the data stored in the unit of the storage volume; and', 'determining which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics., 'maintaining a plurality of functions to configure a unit of a storage volume, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently;'}10. The system of claim 9 , wherein the plurality of functions include thin provisioning claim 9 , wherein the computed statistics include determining a rate at which write operations are performed on the unit of the storage volume and an available amount of unused space on the unit of the storage volume claim 9 , the operations further comprising:applying thin provisioning to the unit of the storage volume, in response to determining that the rate at which write operations are performed on the unit of the storage volume does not exceed a predetermined rate of write operations and the available amount of unused space on the unit of the storage volume exceeds a predetermined threshold.11. The system of claim 9 , wherein the plurality of functions includes data deduplication claim 9 , wherein the computed statistics ...

AUTOMATED SELECTION OF FUNCTIONS TO REDUCE STORAGE CAPACITY BASED ON PERFORMANCE REQUIREMENTS

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics. 1. A method , comprising:maintaining a plurality of functions to configure a unit of a storage volume, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently;computing, via a processor, statistics on growth rate of data and access characteristics of the data stored in the unit of the storage volume; anddetermining which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics.2. The method of claim 1 , wherein the plurality of functions include thin provisioning claim 1 , wherein the computed statistics include determining a rate at which write operations are performed on the unit of the storage volume and an available amount of unused space on the unit of the storage volume claim 1 , the method further comprising:applying thin provisioning to the unit of the storage volume, in response to determining that the rate at which write operations are performed on the unit of the storage volume does not exceed a predetermined rate of write operations and the available amount of unused space on the unit of the storage volume exceeds a predetermined threshold.3. The method of claim 1 , wherein the plurality of functions includes data deduplication claim 1 , wherein the computed statistics include determining how much duplicative data is present on the unit the storage volume claim 1 , the method further comprising: ...

Computerised storage system comprising replaceable units for managing testing of replacement units

A method for use in a computerized storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

Deletion of volumes in data storage systems

Storing data volumes in virtual and physical address spaces such that the data units are contiguous in virtual address space but fragmented in physical address space. The mapping between virtual and physical address space is managed by a storage controller that is configured to implement deletes reversibly with a so-called soft delete, the soft delete being reversible up to a later permanent or hard delete. A soft delete triggers a compaction in which the data units of the to-be-deleted volume are gathered together in physical address space. During the time between compaction and hard delete (or restore), the soft deleted volume is thus stored in a space efficient manner. Moreover, the subsequent hard delete can be performed more quickly than if the soft deleted volume were still fragmented across physical address space freeing up space quicker.

Determining System Performance

A system comprises one or more components, such as a processing device and/or a storage device and a monitoring element that is connected to at least one of the components. A mechanism of determining performance in the system determines, for each component, a maximum achievable performance for a component for a specific metric, determines a maximum performance for the component for the specific metric, given the current system configuration, determines a current performance for the component for the specific metric, and provides the determined performance measurements to the monitoring element. 1. A method of determining system performance in a system comprised of one or more components and a monitoring element , the method comprising for each component:determining a maximum achievable performance (pmax) for the component for a specific metric;determining a maximum performance (pmaxconfig) for the component for the specific metric, given the current system configuration;determining a current performance (pcurr) for the component for the specific metric; andproviding the maximum achievable performance, maximum performance, and current performance for the component for the specific metric to the monitoring element.2. A method according to claim 1 , further comprising repeating the determining of the maximum achievable performance claim 1 , maximum performance claim 1 , and current performance for the component for a different metric.3. A method according to claim 1 , further comprising displaying a visual indication combining the maximum achievable performance claim 1 , maximum performance claim 1 , and current performance for the component.4. A method according to claim 1 , further comprising displaying a visual indication combining the maximum achievable performance claim 1 , maximum performance claim 1 , and current performance for the component for multiple metrics.5. A method according to claim 1 , wherein determining a current performance (pcurr) for the ...

AUTOMATED SELECTION OF FUNCTIONS TO REDUCE STORAGE CAPACITY BASED ON PERFORMANCE REQUIREMENTS

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics. 1. A method , comprising:maintaining a plurality of functions to configure a unit of a storage volume, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently;computing, via a processor, statistics on growth rate of data and access characteristics of the data stored in the unit of the storage volume; anddetermining which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics, wherein the plurality of functions includes full allocation, thin provisioning, data compression, and data deduplication in a decreasing order of performance in terms of performing operations on the unit of the storage volume, and in an increasing order of efficiency in terms of storage requirements in the unit of the storage volume, wherein:a new unit is initially provisioned as fully allocated and does not use thin provisioning, data compression or data deduplication; andbased on the computed statistics, migrating the new unit to use thin provisioning, data compression, or data deduplication.2. The method of claim 1 , wherein the computed statistics include determining how much duplicative data is present on the unit the storage volume claim 1 , the method further comprising:applying data deduplication to the unit of the storage volume, in response to determining that duplicative data present on the unit of the storage volume ...

AUTOMATED SELECTION OF FUNCTIONS TO REDUCE STORAGE CAPACITY BASED ON PERFORMANCE REQUIREMENTS

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics. 1. A method , comprising:maintaining a plurality of functions to configure a unit of a storage volume, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently;computing, via a processor, statistics on growth rate of data and access characteristics of the data stored in the unit of the storage volume; anddetermining which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics, wherein the computed statistics include determining a rate at which write operations are performed on the unit of the storage volume and an available amount of unused space on the unit of the storage volume, and wherein the method further comprises: applying thin provisioning to the unit of the storage volume, in response to determining that the rate at which write operations are performed on the unit of the storage volume does not exceed a predetermined rate of write operations and the available amount of unused space on the unit of the storage volume exceeds a predetermined threshold.2. The method of claim 1 , wherein the computed statistics include determining how much duplicative data is present on the unit the storage volume claim 1 , the method further comprising:applying data deduplication to the unit of the storage volume, in response to determining that duplicative data present on the unit of the storage volume exceeds a ...

Prioritization of stored data during a delete process in a virtualized storage system

A method, computer program product and computer system are are provided. A processor receives a host input/output write operation, wherein the host input/output write operation includes host metadata regarding data represented by the host input/output write operation. The processor stores the host input/output write operation in one or more physical storage data units. A processor assigns a priority to the one or more physical storage data units. In response to receiving a host volume delete command associated with at least one of the one or more physical storage data units, a processor prioritizes data units of the host volume for deletion based, at least in part, on the assigned priority of the data units of the host volume, wherein data units with a lower priority are permanently deleted before data units with a higher priority.

METHOD AND APPRATUS FOR COLLECTING AND ANALYZING SURFACE WOUND DATA

A computer-implemented method of analyzing damage to personal protective equipment (PPE) uses a processor connected to a memory device. A plurality of location informations are stored in the memory device. Each location information relates to a respective damage sustained by a respective PPE and comprises a size, shape, and location of the respective damage on the respective PPE. The method includes aggregating and analyzing the location informations from a plurality of the plurality of location informations. At least two of said plurality of the plurality of location informations relate to respective damages sustained by different respective personal protective equipment. The analysis may include displaying the damage from a plurality of the location informations as a function of location on a personal protective equipment model. The analysis may involve filtering the information to isolate criteria of interest. The analysis may be used to improve PPE design and/or tactical training. 1. A computer implemented method of analyzing damage to personal protective equipment using a processor connected to a memory device , the method comprising:storing in the memory device a plurality of location informations, each relating to a respective damage sustained by a respective personal protective equipment and comprising a size, shape, and location of the respective damage on the respective personal protective equipment; andaggregating and analyzing the location informations from a plurality of the plurality of location informations,wherein at least two of said plurality of the plurality of location informations relate to respective damages sustained by different respective personal protective equipment.2. The method of claim 1 , wherein claim 1 , prior to said aggregating and analyzing claim 1 , said size claim 1 , shape claim 1 , and location of said respective damages of said plurality of said plurality of location informations are quantitatively defined relative to a ...

METHOD AND SYSTEM FOR TRANSMITTING AN APPLICATION MESSAGE BETWEEN NODES OF A CLUSTERED DATA PROCESSING SYSTEM

Systems for transmitting an application message between nodes of a clustered data processing system are disclosed. One system includes a determination of whether one or more application messages may currently be transmitted to a first node of a plurality of nodes from a second node of the plurality of nodes. The system further includes processing the one or more application messages in response to a determination that the one or more application messages may be currently transmitted. 1. A system for communicating an application message between a plurality of nodes , comprising: a respective first buffer, and', preparing its respective first buffer for receiving application messages,', each read request is transmitted in response to each respective first buffer being prepared for receiving messages, and', 'each read request comprises a reference to its respective first buffer,, 'transmitting a read request to every other node, wherein, 'commanding every node to transmit one or more application messages to its respective first buffer,', 'receiving each read request,', 'determining, at a first time, whether its second buffer comprises the one or more application messages for transmittal to each node in response to a receipt of each read request, and', transmitting an application message of the one or more application messages from each node to every other node in response to a determination that the second buffer comprises the one or more application messages, the application message specifying that each respective first buffer is a destination of the application message, and', 'recording data indicating that each read request from every other node has been received in response to a determination that the second buffer does not comprise the one or more application messages., 'immediately processing each read request if the second buffer comprises the one or more application messages at the first time, wherein processing each read request comprises], 'a respective ...

METHOD AND SYSTEM FOR TRANSMITTING AN APPLICATION MESSAGE BETWEEN NODES OF A CLUSTERED DATA PROCESSING SYSTEM

Systems for transmitting an application message between nodes of a clustered data processing system are disclosed. One system includes a determination of whether one or more application messages may currently be transmitted to a first node of a plurality of nodes from a second node of the plurality of nodes. The system further includes processing the one or more application messages in response to a determination that the one or more application messages may be currently transmitted. 1. A system for communicating an application message between a plurality of nodes , comprising:a first buffer;a second buffer;a sending node associated and in communication with the second buffer; and preparing the first buffer for receiving application messages,', the read request is transmitted in response to the first buffer being prepared for receiving messages, and', 'the read request comprises a reference to the first buffer, and, 'transmitting a read request to the sending node, wherein, 'commanding the sending node to transmit one or more application messages to the first buffer,, 'a receiving node in communication with the sending node and associated and in communication with the first buffer, the receiving node configured for receiving the read request,', 'determining, at a first time, whether the second buffer comprises the one or more application messages for transmittal to the receiving node in response to a receipt of the read request, and', transmitting an application message of the one or more application messages from the sending node to the receiving node in response to a determination that the second buffer comprises the one or more application messages, the application message specifying that the first buffer is a destination of the application message,', 'recording data indicating that the read request from the receiving node has been received at the sending node in response to a determination that the second buffer does not comprise the one or more application ...

AUTOMATED SELECTION OF FUNCTIONS TO REDUCE STORAGE CAPACITY BASED ON PERFORMANCE REQUIREMENTS

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics. 1. A method , comprising:maintaining a plurality of functions to configure a unit of a storage volume, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently;computing, via a processor, statistics on growth rate of data and access characteristics of the data stored in the unit of the storage volume; anddetermining which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics, wherein the plurality of functions includes full allocation, thin provisioning, data compression, and data deduplication in a decreasing order of performance in terms of performing operations on the unit of the storage volume, and in an increasing order of efficiency in terms of storage requirements in the unit of the storage volume, wherein:a new unit is initially provisioned as fully allocated and does not use thin provisioning, data compression or data deduplication; andbased on the computed statistics, migrating the new unit to use thin provisioning, data compression, or data deduplication.2. The method of claim 1 , wherein the computed statistics include determining how much duplicative data is present on the unit the storage volume claim 1 , the method further comprising:applying data deduplication to the unit of the storage volume, in response to determining that duplicative data present on the unit of the storage volume ...

Method and apparatus for detection of port name in a loop network

Method and apparatus for fault location in a loop network

A method and apparatus are provided for fault location in a loop network ( 100, 200, 400 ). The network system having a host port ( 214 ) for supplying and receiving data and a plurality of successively connected ports ( 201, 202, 203, 204, 205 ) through which data from the host port ( 214 ) is transferred. A counter ( 122 ) for each port records data transfers in which the amount of data received at a destination port is less than an expected amount of data. When a transfer with less than the expected amount of data is identified for a data flow between a sending port ( 201 ) and a destination port ( 214 ), the counters are incremented for each port ( 202, 203, 204, 205, 214 ) after the sending port up to and including the destination port. Analysing means determines a fault location in the network system from the distribution of counts in the counters ( 122 ).

Method and apparatus for collecting and analyzing surface wound data

A 3D surface wound, injury, and personal protective equipment (PPE) data entry system provides an easily usable graphical user interface through which an examiner can objectively record data relating to surface wounds and injuries sustained by a subject human, as well as PPE used when the wounds/injuries were sustained. The system includes a 3D human model onto which the examiner draws the surface wound(s) and/or damage to the PPE. The subject human's record is stored in a database of similar records. The database records comprise quantifiable, objective data that is easily compared and analyzed. An analysis tool can aggregate a selected population of human subjects within the database to create wound density information that can be statistically analyzed and/or displayed on a standard 3D human model. Such objective wound density information may facilitate improved medical and/or tactical training, and improved PPE design.

Method and apparatus for collecting and analyzing surface wound data

A 3D surface wound, injury, and personal protective equipment (PPE) data entry system provides an easily usable graphical user interface through which an examiner can objectively record data relating to surface wounds and injuries sustained by a subject human, as well as PPE used when the wounds/injuries were sustained. The system includes a 3D human model onto which the examiner draws the surface wound(s) and/or damage to the PPE. The subject human's record is stored in a database of similar records. The database records comprise quantifiable, objective data that is easily compared and analyzed. An analysis tool can aggregate a selected population of human subjects within the database to create wound density information that can be statistically analyzed and/or displayed on a standard 3D human model. Such objective wound density information may facilitate improved medical and/or tactical training, and improved PPE design.

Method and apparatus for recovery from faults in a loop network

A method and apparatus for recovery from faults in a loop network ( 500 ) is provided. The loop network ( 500 ) has a plurality of ports ( 520, 530, 532, 534 ) serially connected with means for bypassing the ports ( 520, 530, 532, 534 ) from the loop network ( 500 ). A control device ( 522, 524 ) is provided with bypass control over at least one of the ports ( 530, 532, 534 ). A host means ( 502 ) sends a command to the control device ( 522, 524 ) at regular intervals and the control device ( 522, 524 ) has a counter which restarts a time period at the receipt of each command. If the time period expires, the control device ( 522, 524 ) activates the means for bypassing all the ports ( 530, 532, 534 ) under its control. The loop network ( 500 ) may have two loops ( 516, 518 ) with at least some of the ports ( 520, 530, 532, 534 ) common to both loops ( 516, 518 ).

Method and apparatus for improving performance of a loop network by selectively bypassing redundant ports and also bypassing faulty ports

A method and apparatus for improving performance of a loop network (400), in particular a Fibre Channel Arbitrated Loop. The loop network (400) has two loops (406, 408) and a plurality of dual ported devices (410) each with one port (411, 412) on each loop (406, 408) . The method includes selectively bypassing redundant ports on the loops (406, 408) by a first command means in the form of a Fibre Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports (411, 412) in each loop (406, 408). In the event of a fault, bypassing the port of a device (410) by a second command means in the form of a non Fibre Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.

Method and apparatus for detection of port name in a loop network

A method and apparatus for detection of a port name in a loop network is provided, particularly a loop network in the form of a Fibre Channel Arbitrated Loop (FC-AL). The loop network has a plurality of devices each device having at least one port on the loop network. The method includes determining which ports are populated with devices for which the unique port name (WWPN) is not known 302. The populated ports are then all bypassed 303 and a mode is entered on the loop network in which idle frames are transmitted around the loop network. One port is un-bypassed at a time and the port name from the un-bypassed port is received and recorded. The port name is received from the un-bypassed port in a Loop Initialisation Select Master (LISM) frame transmitted by the un-bypassed port.

FC-AL cabling management system

An apparatus to detect a fiber channel miscabling event includes a module configured to identify a connection made between first and second unlike devices in a fiber channel topology. If an unlike connection identified to have been made the module enables an upstream port of the second device, leaving a downstream port of the second device disabled. A method to detect a fiber channel miscabling event includes detecting a fiber channel cable connection configuration, determining whether a connection is made between first and second unlike fiber channel units, and enabling an upstream port of the second fiber channel unit while keeping a downstream port of the second fiber channel unit disabled if an unlike connection is determined to have been made.

Method and system for transmitting an application message between nodes of a clustered data processing system

A method and system for transmitting an application message between nodes of a clustered data processing system is disclosed. According to one embodiment, a method, embodied within a machine-readable medium, is provided according to which a determination is made whether one or more application messages to be transmitted to a first node of a plurality of nodes from a second node of the plurality may be currently transmitted. The method of the described embodiment further includes the processing of the one or more application messages in response to a determination whether the one or more application messages of may be currently transmitted.

Method and apparatus for improving performance of a loop network

A method and apparatus for improving performance of a loop network, in particular a Fiber Channel Arbitrated Loop. The loop network has two loops and a plurality of dual-ported devices each with one port on each loop. The method includes selectively bypassing redundant ports on the loops by a first command means in the form of a Fiber Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports in each loop. In the event of a fault, bypassing the port of a device by a second command means in the form of a non Fiber Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.

Automatisierte Auswahl von Funktionen zum Verringern der Speicherkapazität auf der Grundlage von Leistungsanforderungen

Verfahren, aufweisend:- Verwalten (502) einer Vielzahl von Funktionen zum Konfigurieren einer Einheit eines Speicherdatenträgers, wobei jede aus der Vielzahl von Funktionen als Reaktion darauf, dass sie auf die Einheit des Speicherdatenträgers angewendet wird, die Einheit des Speicherdatenträgers auf andere Art und Weise konfiguriert;- Berechnen (504) von Statistiken zu Datenwachstumsrate und Zugriffseigenschaften der in der Einheit des Speicherdatenträgers gespeicherten Daten; und- Ermitteln (506) auf der Grundlage der berechneten Statistiken, welche aus der Vielzahl von Funktionen auf die Einheit des Speicherdatenträgers anzuwenden ist,- wobei eine neue Einheit bereitgestellt wird, die vollständig zugeordnet ist (402) und die keine schlanke Speicherzuweisung (404), Datenkompression (406) oder Datendeduplizierung (408) verwendet,- und abhängig von den berechneten Statistiken Migration der neuen Einheit zur Verwendung von schlanker Speicherzuweisung, Datenkompression oder Datendeduplizierung, wobei die berechneten Statistiken beinhalten, dass eine Rate, mit der Schreiboperationen auf der Einheit des Speicherdatenträgers durchgeführt werden, und eine verfügbare Menge von ungenutztem Platz auf der Einheit des Speicherdatenträgers ermittelt werden, wobei das Verfahren des Weiteren aufweist:- Anwenden der schlanken Speicherzuweisung auf die Einheit des Speicherdatenträgers als Reaktion auf das Ermitteln, dass die Rate, mit der Schreiboperationen auf der Einheit des Speicherdatenträgers durchgeführt werden, eine vorgegebene Rate von Schreiboperationen nicht übersteigt, und dass die verfügbare Menge an ungenutztem Platz auf der Einheit des Speicherdatenträgers einen vorgegebenen Schwellenwert übersteigt.

Automated selection of functions to reduce storage capacity based on performance requirements

Automated selection of functions to reduce storage capacity based on performance requirements

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics.

Automated selection of functions to reduce storage capacity based on performance requirements

A plurality of functions to configure a unit of a storage volume is maintained, wherein each of the plurality of functions, in response to being applied to the unit of the storage volume, configures the unit of the storage volume differently. Statistics are computed on growth rate of data and access characteristics of the data stored in the unit of the storage volume. A determination is made as to which of the plurality of functions to apply to the unit of the storage volume, based on the computed statistics.

Reactive deep-frozen adaptive replacement cache and drive interface

A method, system, and computer program product for managing a storage system, comprising: analyzing an access request for a first storage block of the set of storage blocks; in response to the access request comprising a read request: in response to the first storage block residing in the cache: processing the read request from the cache; promoting the first storage block within the cache; and destaging the first storage block to the storage device with the first compression ratio; and in response to the first storage block not residing in the cache: processing the read request from the storage device; and copying the first storage block to the cache; in response to the access request comprising a write request: writing the first storage block to the cache; and destaging the first storage block to the storage device using the first compression ratio.

Maintaining cache validity

A method, system, computer program product and computer program for managing a storage system, the storage system comprising a first storage device, a second storage device, a source storage device, a target storage device, and a cache, the method comprising: receiving a first host access request for a data block on the first storage device; receiving a mapping between the source storage device and the target storage device; and in response to the first host access request and the mapping: accessing a corresponding data block on the second storage device; and updating metadata for the cache.

Methods and systems for detecting dropped data writes and corrupt data

A computer-implemented method for detecting data storage errors includes storing first data in a first block corresponding to a first virtual volume, storing second data in a second block corresponding to a second virtual volume, generating parity information for the first data and the second data, and storing the parity information in non-volatile memory at a location corresponding to the logical block address to produce stored parity information. A system and computer program product corresponding to the above method are also disclosed herein.

Maintaining cache validity

A method for managing a storage system with a first storage device, a second storage device, a source storage device, a target storage device, and a cache, for example a redundant array of independent disks (RAID), is disclosed. The method comprises receiving a first host access request for a data block on the first storage device, receiving a mapping between the source storage device and the target storage device, and in response to the first host access request and the mapping accessing a corresponding data block on the second storage device and updating metadata for the cache. The mapping may indicate that the data block on the first storage device has not been copied to a corresponding data block on the second storage device, and in response to the first host access request comprising a read request for the data block on the target storage device and to the mapping, the corresponding data block on the source storage device is read, and metadata for the target storage device are updated.

Reactive deep-frozen adaptive replacement cache and drive interface

A storage system comprises a storage device and a cache. Data is written to the storage device using one of two compression ratios. When the storage system receives a read request for data that is in the cache, the data is transferred to the requesting device from the cache 204. The data is then written to the storage device with the higher compression ratio 206-8. When the storage system receives a read request for data that is not in the cache, the data is transferred to the requesting device from the storage device 210 and stored in the cache 212. When a write request is received, the data is transferred into the cache from the requesting device 214 and written to the storage device with the higher compression ratio 216. When a block is deleted from the cache 218, the data is written to the storage device with the lower compression ratio 220. If the system determines that a block is frequently used 222, it is compressed with the higher compression ratio 224.

Storage data copies with differing compression algorithms

A system for managing a storage array in a storage system may include an analysis component for analyzing a set of compression ratios used for a set of storage blocks written on a first storage device and a second storage device to determine a pattern. The system may include a determination component for determining, responsive to the pattern, a first compression ratio and a second compression ratio; the first compression ratio may be different from the second compression ratio. The system may include a data read/write component for writing a storage block to the first storage device with the first compression ratio and writing the storage block to the second storage device with the second compression ratio.

Computerised storage system comprising one or more replaceable units for managing testing of one or more replacement units

A method, apparatus and software is disclosed, for use in a computerised storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

Storage data copies with differing compression algorithms

A method, system, and computer program product for managing a storage system, the storage system comprising a first storage device and a second storage device, the method comprising: analysing a set of compression ratios used for a set of storage blocks written on the first storage device and the second storage device to determine a pattern; in response to the pattern, determining a first compression ratio and a second compression ratio, the first compression ratio being different from the second compression ratio; and writing a storage block to the first storage device with the first compression ratio and writing the storage block to the second storage device with the second compression ratio.

Storage data copies with differing compression algorithms

A computer implemented method for managing a storage system with multiple storage devices, for example a redundant array of independent disks (RAID) system, is disclosed. The method comprises analysing compression ratios used for storage blocks written on a first and a second storage device to determine a pattern, in response to the pattern determining a first and a second compression ratio, the first compression ratio being different from the second, and writing a storage block to the first storage device with the first compression ratio and to the second storage device with the second compression ratio. The method may determine the spare capacities on the first and second storage devices, and in response to determining that the first spare capacity is greater than the second by a threshold value, writing a storage block to the storage device with the lower spare capacity using the higher compression ratio, and vice versa. The method may also determine that a first and second compression ratio has been used for the most recent Y writes to the first and second storage device respectively and write the next storage block using the opposite compression ratios for the two storage devices.

Computerised storage system comprising replaceable units for managing testing of replacement units

A method for use in a computerized storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

A computerised storage system comprising replaceable units for managing testing of replacement units

A method, apparatus and software is disclosed, for use in a computerised storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

A computerised storage system comprising replaceable units for managing testing of replacement units

A method, apparatus and software is disclosed, for use in a computerised storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

Data deduplication

Embodiments of the present invention provide concepts for handling a handover of ownership of data from a source to a referrer in a data deduplication environment. By performing a handover of the ownership of the data from the source to the referrer, the number of processes required to access the data may be reduced and so the performance of the system may be improved. The identification of a source for performing the handover on may be performed by way of a volatile cache.