Patent application number | Description | Published |
20080250197 | Physical Tape Interchange Format - A virtual tape server for executing a method involving a partitioning of a virtual tape volume into a plurality of virtual tape blocks. The virtual tape volume includes a virtual tape volume header having recovery information, each virtual tape block includes a virtual tape block header identifying the virtual tape volume and a block sequence number, and one or more of the virtual tape blocks includes the virtual tape volume header. The method further involves a formatting of a physical tape volume including each virtual tape block. | 10-09-2008 |
20090006734 | APPARATUS, SYSTEM, AND METHOD FOR SELECTING A CLUSTER - An apparatus, system, and method are disclosed for selecting a source cluster in a distributed storage configuration. A measurement module measures system factors for a plurality of clusters over a plurality of instances. The clusters are in communication over a network and each cluster comprises at least one tape volume cache. A smoothing module applies a smoothing function to the system factors, wherein recent instances have higher weights. A lifespan module calculates a mount-to-dismount lifespan for each cluster from the smoothed system factors. A selection module selects a source cluster for accessing an instance of a specified volume in response to the mount-to-dismount lifespans and a user policy. | 01-01-2009 |
20090063748 | Method and Apparatus for Providing Continuous Access to Shared Tape Drives from Multiple Virtual Tape Servers Within a Data Storage System - A method for providing continuous access to shared tape drives from two virtual tape server (VTS) nodes is disclosed. A group of tape drives are connected to two VTS nodes via a set of switches. Both VTS nodes can concurrently process requests to mount physical tape cartridges to separate tape drives. The selection of a tape drive to fulfill a volume mount request on a physical volume begins by locking down any access to a tape drive table having a composite view of all the tape drives shared between the two VTS nodes. An available tape drive is then selected to mount the physical volume, and an entry in the tape drive table is updated to claim ownership of the tape drive. A reservation command is sent to the tape drive to lock down any access to the tape drive, and the lock to the tape drive table is released. Having claimed ownership to the tape drive, the VTS node can now perform the volume mount request. | 03-05-2009 |
20090193140 | SYSTEM AND METHOD FOR THROTTLING HOST THROUGHPUT - A method for throttling host throughput in a computer storage subsystem is provided. The host throughput is compared to a throughput limit for a predetermined time period. If the host throughput exceeds the throughput limit during the predetermined time period, an input/output (I/O) delay is set equal to the remainder of the predetermined time period, and the delay is implemented for an associated storage device of the computer storage subsystem. | 07-30-2009 |
20090248974 | OPTIMIZING OPERATIONAL REQUESTS OF LOGICAL VOLUMES - A method, system, apparatus and computer program product for determining an optimal file operational time in a data storage system for use with a tape media storing data in a serpentine pattern on tape media is provided. The operational time is optimized based on a “sequence on tape” algorithm, a “minimum reversal of direction on tape” algorithm, or a “minimum delay to next data” algorithm. A model is used to determine the predicted performance of each of the algorithms, and the algorithm that provides the minimum overall operational time is chosen and applied for carrying out an operational process on the tape media. | 10-01-2009 |
20100174762 | Apparatus, System, and Method for Maintaining A Context Stack - An apparatus, system, and method are disclosed for maintaining a context stack. A monitor module monitors a stack size after each monitor interval for a stack of a plurality of contexts. Each context defines communications between a process and a data set and comprises a pathway for communicating with the data set and a process identifier. A stack module deallocates a context that satisfies a stack policy from the stack if the stack size is within a buffer threshold of a maximum threshold. | 07-08-2010 |
20100293328 | MANAGING FIRST LEVEL STORAGE IN A MULTI-HOST ENVIRONMENT - A virtual tape server (VTS) and a method for managing shared first level storage, such as a disk cache, among multiple virtual tape servers are provided. Such a system and method manage first level storage to accommodate two or more host processing systems by maintaining adequate free space in the cache for each host and by preventing one host, such as a mainframe, from taking over free space from another host, such as a Linux system. | 11-18-2010 |
20120254117 | Reducing a Backup Time of a Backup of Data Files - A mechanism is provided for reducing the backup time of data files from a memory. Data files are pre-staged by identifying the data files in the memory to be backed up to a backup storage system, sorting the data files by size thereby forming a set of small data files and a set of large data files, and copying the set of small data files to a cache while leaving the set of large data files in a disk subsystem. The set of small data files are then backed-up from the cache and the set of large data files are backed-up from the disk subsystem to a backup storage system. Thus, the time required to backup the set of small data files from the cache is performed at a faster rate as compared to backing up the set of large data files from the disk subsystem. | 10-04-2012 |
20130173555 | Reducing a Backup Time of a Backup of Data Files - A mechanism is provided for reducing the backup time of data files from a memory. Data files are pre-staged by identifying the data files in the memory to be backed up to a backup storage system, sorting the data files by size thereby forming a set of small data files and a set of large data files, and copying the set of small data files to a cache while leaving the set of large data files in a disk subsystem. The set of small data files are then backed-up from the cache and the set of large data files are backed-up from the disk subsystem to a backup storage system. Thus, the time required to backup the set of small data files from the cache is performed at a faster rate as compared to backing up the set of large data files from the disk subsystem. | 07-04-2013 |
20130198861 | VIRTUAL AVATAR AUTHENTICATION - In one general embodiment, a method for determining a controlling entity of a first avatar in a virtual world includes: receiving a request for access to a resource via a first avatar; providing a challenge to the first avatar in response to receiving the request; receiving a challenge response via the first avatar in response to the challenge; determining an identity confidence level based on the challenge response; making an identity determination for a controlling entity of the first avatar based on the identity confidence level; and providing or denying access to the resource based on the identity determination. | 08-01-2013 |
20140325312 | METHOD AND SYSTEM FOR SCRUBBING DATA WITHIN A DATA STORAGE SUBSYSTEM - A method and system for scrubbing data within a data storage subsystem is disclosed. According to one embodiment, a method is provided for scrubbing data of a storage element within a data storage subsystem. In the described method embodiment, a request to access the storage element is processed utilizing a first processing module and access permission metadata associated with the storage element. A data scrub process is concurrently performed utilizing a second processing module by modifying the access permission metadata and validating data of the storage element substantially simultaneously with the processing. | 10-30-2014 |
20140380242 | DISPLAYING DATA PROTECTION LEVELS - For displaying data protection levels, a protection module receives a data protection level for a file system object. A display module modifies an icon representing the file system object in a file system graphical user interface to display the data protection level for the file system object. | 12-25-2014 |
20150020201 | ANTI-VIRAL COMPILER - In one general embodiment, a computer program product for compiling code includes a computer readable storage medium having computer readable code stored/encoded thereon. The computer readable code is readable/executable by a processor to: receive computer readable code to compile, the code including one or more functions, each function including one or more call functions; and build a stack frame for one of the call functions in the code. The stack frame includes: a return address sequence, logic configured to define local variables, logic configured to define a first guard variable and a second guard variable, logic configured to compare the first guard variable to the second guard variable, logic configured to execute the return address sequence when the first and second guard variables match, and logic configured to abort prior to executing the return address sequence when the first and second guard variables do not match. | 01-15-2015 |
20150067255 | APPARATUS, SYSTEM, AND METHOD FOR MAINTAINING A CONTEXT STACK - An apparatus, system, and method are disclosed for maintaining a context stack. A monitor module monitors a stack size after each monitor interval for a stack of a plurality of contexts. Each context defines communications between a process and a data set and comprises a pathway for communicating with the data set and a process identifier. A stack module deallocates a context that satisfies a stack policy from the stack if the stack size is within a buffer threshold of a maximum threshold. | 03-05-2015 |