Patent application number | Description | Published |
20080209040 | Proxy caching for directory services - Proxy caching for directory services are presented. Requests for directory resources are intercepted and an inspection of cache is made to determine whether a resource being requested is identified in cache. When an identifier for the resource is identified in cache, a corresponding directory service associated with a cache entry for that resource is used to supply the resource; otherwise the resource is supplied by a directory service selected by policy. | 08-28-2008 |
20090044194 | MULTITHREADED LOCK MANAGEMENT - Apparatus, systems, and methods may operate to construct a memory barrier to protect a thread-specific use counter by serializing parallel instruction execution. If a reader thread is new and a writer thread is not waiting to access data to be read by the reader thread, the thread-specific use counter is created and associated with a read data structure and a write data structure. The thread-specific use counter may be incremented if a writer thread is not waiting. If the writer thread is waiting to access the data after the thread-specific use counter is created, then the thread-specific use counter is decremented without accessing the data by the reader thread. Otherwise, the data is accessed by the reader thread and then the thread-specific use counter is decremented. Additional apparatus, systems, and methods are disclosed. | 02-12-2009 |
20090112818 | TECHNIQUES FOR PARALLEL PROCESSING OF DIRECTORY SEARCHES - Techniques for parallel processing of directory searches are provided. A directory search is received on a multicore or multiprocessor architecture machine. At least two threads processing on different cores or processors of the machine handle different aspects of the directory search. A first thread identifies matches in the directory for the search and serially populates the matches to search results. The second thread serially and in parallel grabs the matches in the search results and filters some out and modifies other ones of them to complete processing on the search. The search results are then returned to an initial requester making the initial search. | 04-30-2009 |
20100125893 | TECHNIQUES FOR ENFORCING ACCESS RIGHTS DURING DIRECTORY ACCESS - Techniques for enforcing access rights during directory access are presented. Access rights are maintained at the container level of a directory tree for container objects within a cache. When security is set for a requester of a target, the container object cache is directly accessed along with rights assigned to the target and the security is calculated and then set against the requester. | 05-20-2010 |
20100241676 | SELECTIVE DURABILITY IN A DIRECTORY DATABASE - Selective durability in a directory database is presented. A directory database that provides durability processing includes a mechanism where selective attributes for directory resources can turn durability processing off. So, when a directory transaction is encountered having a durability processing turned off, the directory database processes that directory transaction without first flushing the directory transaction from memory to storage. | 09-23-2010 |
Patent application number | Description | Published |
20110173506 | Clearing SCSI Reservations for Non-Detectable Initiators for Extended Duration - A method, system and computer-usable medium are disclosed for managing storage system resources in a storage area network (SAN). A target data storage server registers itself within a storage area network (SAN) fabric to receive a Registered State Change Notification (RSCN) should a SCSI initiator become inactive. A SCSI initiator then requests reservation of a target LUN. In response, the target data server reserves the LUN for use by the SCSI initiator. If a RSCN is received by the target data storage server, then a GID_PN server request, which comprises the unique identifier of SCSI initiator, is generated after a predetermined time interval and a SAN fabric name server. If the name server's response to the GID_PN server request is positive, then the SCSI initiator was detected as being active and the target data storage server keeps the reservation for the LUN active for the SCSI initiator. Otherwise, the reservation for the LUN is released for use by other SCSI initiators. | 07-14-2011 |
20120179807 | Clearing SCSI Reservations for Non-Detectable Initiators for Extended Duration - A method, system and computer-usable medium are disclosed for managing storage system resources in a storage area network (SAN). A target data storage server registers itself within a storage area network (SAN) fabric to receive a Registered State Change Notification (RSCN) should a SCSI initiator become inactive. A SCSI initiator then requests reservation of a target LUN. In response, the target data server reserves the LUN for use by the SCSI initiator. If a RSCN is received by the target data storage server, then a GID_PN server request, which comprises the unique identifier of SCSI initiator, is generated after a predetermined time interval and a SAN fabric name server. If the name server's response to the GID_PN server request is positive, then the SCSI initiator was detected as being active and the target data storage server keeps the reservation for the LUN active for the SCSI initiator. Otherwise, the reservation for the LUN is released for use by other SCSI initiators. | 07-12-2012 |
20130036240 | SCSI Reservation Status Information on a SAN Disk - A system and computer program product are disclosed for retrieving the reservation status information of a storage area network (SAN) device, a host transmits a persistent reservation in command with service action setting of ‘read reservation’ to a first LUN, wherein the host is connected to a port of the data storage server to which the LUN belongs. The host receives a message from the LUN. The host determines that the message is a success. The host sends to the LUN a persistent reservation in command with service action setting of ‘read keys’, responsive to a success message. The host determines that the LUN responds with a zero data length. The host determines the LUN is reserved with type 2 reservation, responsive to a determination that the LUN responds with a non-zero data length. | 02-07-2013 |
20130036241 | SCSI Reservation Status Information on a SAN Disk - A method is disclosed for retrieving the reservation status information of a storage area network (SAN) device, a host transmits a persistent reservation in command with service action setting of ‘read reservation’ to a first LUN, wherein the host is connected to a port of the data storage server to which the LUN belongs. The host receives a message from the LUN. The host determines that the message is a success. The host sends to the LUN a persistent reservation in command with service action setting of ‘read keys’, responsive to a success message. The host determines that the LUN responds with a zero data length. The host determines the LUN is reserved with type 2 reservation, responsive to a determination that the LUN responds with a non-zero data length. | 02-07-2013 |
20130191547 | Processing STREAMS Messages Over a System Area Network - A computer implemented method processes STREAMS messages over an Infiniband system area network. STREAMS messages received at a STREAMS over Infiniband module from a STREAMS based application are encapsulated in Infiniband verbs to create an encapsulated STREAMS message. A STREAMS identifier header is appended onto the Infiniband verb. The STREAMS over Infiniband module forwards the encapsulated STREAMS message to a streams interface layer where the encapsulated STREAMS message is then forwarded to a host channel adapter of the Infiniband system area network. | 07-25-2013 |
20130191548 | Processing STREAMS Messages Over a System Area Network - A computer implemented method processes STREAMS messages over an Infiniband system area network. STREAMS messages received at a STREAMS over Infiniband module from a STREAMS based application are encapsulated in Infiniband verbs to create an encapsulated STREAMS message. A STREAMS identifier header is appended onto the Infiniband verb. The STREAMS over Infiniband module forwards the encapsulated STREAMS message to a streams interface layer where the encapsulated STREAMS message is then forwarded to a host channel adapter of the Infiniband system area network. | 07-25-2013 |
20140082433 | SCSI Reservation Status Information on a SAN Disk - A method is disclosed for retrieving the reservation status information of a storage area network (SAN) device, a host transmits a persistent reservation in command with service action setting of ‘read reservation’ to a first LUN, wherein the host is connected to a port of the data storage server to which the LUN belongs. The host receives a message from the LUN. The host determines that the message is a success. The host sends to the LUN a persistent reservation in command with service action setting of ‘read keys’, responsive to a success message. The host determines that the LUN responds with a zero data length. The host determines the LUN is reserved with type 2 reservation, responsive to a determination that the LUN responds with a non-zero data length. | 03-20-2014 |
20140157046 | TECHNIQUES FOR DYNAMICALLY TRACKING LOGICAL UNITS MOVING BETWEEN INPUT/OUTPUT PORTS OF A STORAGE AREA NETWORK TARGET - A technique for operating a storage area network includes detecting an input/output operation failure associated with a logical unit number, which is associated with a first target port. The technique also includes determining, subsequent to the detected input/output operation failure, whether the logical unit number is associated with a second target port. Finally, the technique includes routing subsequent input/output operations for the logical unit number to the logical unit number via the second target port, in response to determining that the logical unit number is associated with the second target port. | 06-05-2014 |
20150100770 | DYNAMIC RECONFIGURATION OF QUEUE PAIRS - Dynamic reconfiguration of queue pairs in a data processing system is provided. A device driver determines whether a dynamic CPU reconfiguration has added one or more CPUs to the data processing system, wherein the data processing system comprises a number of CPUs and a number of queue pairs. Responsive to the dynamic CPU configuration adding one or more CPUs, the device driver allocates a portion of a memory corresponding to a queue pair, wherein each queue pair comprises a receive queue and a transmit queue, programs a receive side scaling mechanism in a network adapter to allow for dynamic insertion of a processing engine associated with the queue pair, and enables transmit tuple hashing to the queue pair. | 04-09-2015 |
20150100771 | DYNAMIC RECONFIGURATION OF QUEUE PAIRS - Dynamic reconfiguration of queue pairs in a data processing system is provided. A device driver determines whether a dynamic CPU reconfiguration has added one or more CPUs to the data processing system, wherein the data processing system comprises a number of CPUs and a number of queue pairs. Responsive to the dynamic CPU configuration adding one or more CPUs, the device driver allocates a portion of a memory corresponding to a queue pair, wherein each queue pair comprises a receive queue and a transmit queue, programs a receive side scaling mechanism in a network adapter to allow for dynamic insertion of a processing engine associated with the queue pair, and enables transmit tuple hashing to the queue pair. | 04-09-2015 |
20150149998 | USING ALTERNATE PORT NAME FOR UNINTERRUPTED COMMUNICATION - In a method for communicating in a computing environment, a first computer establishing communication with a first virtual computer through a first virtual port using a primary port name for the first virtual port, wherein the first virtual computer is executing on a second computer. The first computer acquires an alternate port name for the first virtual port from the first virtual computer executing on the second computer. The first computer determines that the first virtual computer is not accessible using the primary port name for the first virtual port, wherein the first virtual computer is migrated to execute on a third computer. The first computer establishes communication with the first virtual computer executing on the third computer using the alternate port name of the first virtual port. | 05-28-2015 |
20150150000 | USING ALTERNATE PORT NAME FOR UNINTERRUPTED COMMUNICATION - In a method for communicating in a computing environment, a first computer establishing communication with a first virtual computer through a first virtual port using a primary port name for the first virtual port, wherein the first virtual computer is executing on a second computer. The first computer acquires an alternate port name for the first virtual port from the first virtual computer executing on the second computer. The first computer determines that the first virtual computer is not accessible using the primary port name for the first virtual port, wherein the first virtual computer is migrated to execute on a third computer. The first computer establishes communication with the first virtual computer executing on the third computer using the alternate port name of the first virtual port. | 05-28-2015 |