Release Features

Release 4.733 (April 15, 2010)

  1. Improved support for modeling of high-speed Ficon channels.
  2. Several usability and interface improvements, including the ability to define filters for device names.
  3. Corrects know problems.

Release 4.731 (August, 2008)

  1. Introduces user interface improvements for selected information messages generated by Lead Time.
  2. Corrects known problems, in particular, a floating point underflow issue in some models with Fibre Channels or FICON channels.

Release 4.730 (May 24, 2008)

  1. A model of the EMC DMX-4 controller.
  2. Support for RAID-6 configurations with HDS TagmaStore and EMC DMX controllers.
  3. Improved support for Open Systems environments, including iSCSI and Fibre channels.
  4. Several usability and user interface improvements.
  5. A new release of our Xtgen tool updated to include controllers supported in this Lead Time version.

Release 4.724 (June 13, 2007)

  1. A model of the Hitachi Universal Storage Platform V controller.
  2. Models of IBM DS6000, DS8000, as well as IBM DS8000 Turbo controllers.
  3. Support for 4 Gb/s FICON channels and Fibre Channel links.
  4. Support for recent Seagate and Hitachi disk drives.
  5. A new release of our Xtgen tool updated to include controllers supported in this Lead Time version.

Release 4.723 (February 25, 2007)

  1. Changes the Open Exchange limit for HDS Tagmastore USP controllers.
  2. Corrects known bugs, in particular, inconsistencies in reported service time elements for controllers with FICON channels close to saturation.

Release 4.722 (November 4, 2006)

  1. Corrects known bugs.

Release 4.721 (August 28, 2006)

  1. Includes a model of the STK V2X 4F controller.
  2. A new release of our Xtgen tool updated to include controllers supported in this Lead Time version.
  3. Corrects known bugs.

Release 4.720 (July 25, 2006)

  1. Includes models of Hitachi TagmaStore Universal Storage Platform and Network Storage Controller.
  2. Provides support for TagmaStore models with volumes mapped to external controllers.
  3. A new release of our Xtgen tool updated to include controllers supported in this Lead Time version.
  4. Corrects known bugs.

Release 4.711 (September 19, 2005)

  1. Includes models of EMC DMX-2 and newly announced DMX-3 controllers.
  2. Provides improved support for Priming of models with FICON channels and a new option to reduce miscalibration impact of outlier volumes.
  3. Advanced modeling of FICON frame contention and Open Exchange limitation.
  4. Support for FICON channels at 1 Gb/s and at 2 Gb/s with special interface shortcuts for channel conversion modeling.
  5. A release of our SANModel tool integrated with Lead Time for the modeling of selected in-line SAN configurations.
  6. Includes version 6 of the Graphics Server with enhanced functionality and flexibility.
  7. Corrects known bugs, in particular, erroneous “value out of range” message for certain model changes.

Release 4.704B (May 20, 2005)

  1. Provides improved support for Priming of models with FICON channels and a new option to reduce miscalibration impact of outlier volumes.
  2. Includes a calibrated model of the STK V2X F controller.
  3. Advanced modeling of FICON frame contention and Open Exchange limitation.
  4. Support for FICON channels at 1 Gb/s and at 2 Gb/s with special interface shortcuts for channel conversion modeling.
  5. A release of our SANModel tool integrated with Lead Time for the modeling of selected in-line SAN configurations.
  6. Corrects known bugs, in particular problems in certain models of Remote Copy configurations, some models with the STK V2X F controller, as well some pie chart problems.

Release 4.704 (May 08, 2005)

  1. Provides improved support for Priming of models with FICON channels.
  2. Includes a calibrated model of the STK V2X F controller.
  3. Advanced modeling of FICON frame contention and Open Exchange limitation.
  4. Support for FICON channels at 1 Gb/s and at 2 Gb/s with special interface shortcuts for channel conversion modeling.
  5. A first release of our SANModel tool integrated with Lead Time for the modeling of selected in-line SAN configurations.
  6. Corrects known bugs, in particular problems in certain models of Remote Copy configurations as well as some models with the STK V2X F controller.

Release 4.703 (Mar. 10, 2005)

  1. Provides improved support for Priming of models with FICON channels.
  2. Includes a calibrated model of the STK V2X F controller.
  3. Advanced modeling of FICON frame contention and Open Exchange limitation.
  4. Support for FICON channels at 1 Gb/s and at 2 Gb/s with special interface shortcuts for channel conversion modeling.
  5. A first release of our SANModel tool integrated with Lead Time for the modeling of selected in-line SAN configurations.
  6. Corrects known bugs.

Release 4.702 (Aug. 31, 2004)

  1. Includes a calibrated model of the STK V2X F controller.
  2. Advanced modeling of FICON frame contention and Open Exchange limitation.
  3. Support for FICON channels at 1 Gb/s and at 2 Gb/s with special interface shortcuts for channel conversion modeling.
  4. A first release of our SANModel tool integrated with Lead Time for the modeling of selected in-line SAN configurations.
  5. Corrects known bugs.

Release 4.700 B (Dec. 16, 2003)

  1. Includes an improved model of FICON channels.
  2. Corrects known bugs.

Release 4.700 A (Oct. 30, 2003)

  1. Includes support for EMC Symmetrix 8230, 8530, 8830 controllers, including internal models of the CacheStorm™ technology.
  2. High-level workload specification, in particular for Open Systems, including SPC-1-like workloads.
  3. Improved modeling of multi-host configurations (Shared-DASD in Legacy environments).
  4. Redesigned user interface combining most model parameters in a compact set of property pages and introducing explicit representation of the Operating System environment.
  5. New utilities to:
    • Determine sustainable I/O rates for a specified goal response time (Determine function).
    • Simplify consolidation studies (Unite function).
    • Ensure consistency of models in multi-host environments (Synchronizer tool).
  6. Corrects known bugs.
  7. The password required to install the new release has changed. Please contact PALLAS International by e-mail, fax or phone to obtain the new password.

Release 4.699 C (Apr. 30, 2003)

  1. Includes usability enhancements, in particular in definition of Remote Copy connections and selected overheads.
  2. Corrects known bugs, in particular, excessive propagation delays in certain model of Remote Copy configurations.

Release 4.699 (Mar. 21, 2003)

  1. Includes a calibrated model of the STK V2X V2 controller.
  2. Introduces support for IBM ESS Model 800 and Model 800 Turbo controllers with partial support for RAID 10 mode.
  3. Includes full support for FICON channels at 1 Gb/s and 2 Gb/s.
  4. Includes usability enhancements: shortcuts for channel migration to FICON, redesigned dialog for volume delete function in Lead Time, and a new release of Xtgen removing the need to specify time periods.
  5. Corrects known bugs, in particular, in Xtgen with more than 8 LCUs.

Release 4.698 (Dec. 18, 2002)

  1. Introduces enhanced dialogs for Remote Copy workloads.
  2. Corrects known bugs, in particular, excessive queueing time problem in certain models of Remote Copy configurations.

Release 4.697 (Dec. 03, 2002)

  1. Corrects known bugs, in particular, excessive Host Director utilization problem in models of Remote Copy configurations.

Release 4.696 (Nov. 17, 2002)

  1. Corrects known bugs, in particular, a problem occurring when calibrating models with Parallel Access Volumes.

Release 4.695 (Oct. 31, 2002)

  1. Includes a calibrated model of the STK V2X controller.
  2. Includes models of the HDS 9900 upgraded controller and of the HDS 9900 V control unit. These models are based on technology evolution and manufacturer specifications and have not yet been calibrated to measurements. Results should be used with caution.
  3. Corrects known bugs.

Release 4.694 (Sep. 16, 2002)

  1. Includes a greatly improved set of functions for modeling Remote Copy configurations. In particular, a calibrated model of STK PPRC implementation has been added. See the User’s Guide or on-line help for a detailed description.
  2. A new facility in the model initialization function (Prime) allows to adjust unknown cache parameters. This is particularly useful in Open System environments or other situations where controller cache data is not available. Use the Execution and miscellaneous property page of the Set menu to activate this option.
  3. Includes a fully revised Lead Time manual and an updated on-line help.
  4. The password required to install the new release has changed. Please contact PALLAS International by e-mail, fax or phone to obtain the new password.
  5. There have been changes to the Lead Time modeling engine. In most cases, the difference in results is expected to be very minor and does not affect model calibration. If needed, a special compatibility mode allows to obtain exactly the same results as in preceding Lead Time version. Use the Execution and miscellaneous property page of the Set menu to activate this mode.
  6. Corrects known bugs.

Click here to access Pallas Lead Time history for features introduced in older releases