HP StorageWorks Hitachi Extended Remote Copy for Mainframe user guide HP XP12000 Disk Array HP XP10000 Disk Array nl Part number: HITA738-96004 First edition: May 2008
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Contents About this Guide .................................................................................. 7 Intended Audience ...................................................................................................................... Related Documentation ................................................................................................................ Document Conventions ............................................................................................................
The XRC Option Panel ............................................................................................................... 35 The Change Option Panel .......................................................................................................... 36 6 Performing XRC for Mainframe Operations .......................................... 41 Setting XRC for Mainframe Options ............................................................................................
Figures 1 Overview of XRC for Mainframe Operations ............................................................... 13 2 Channel Extender Connection Configuration .............................................................. 15 3 Double XRC for Mainframe Operations ...................................................................... 27 4 Configuration in which a Volume is Functioning as XRC for Mainframe P-VOL and TrueCopy z/OS M-VOL ........................................................................
Tables 1 Document Conventions .............................................................................................. 7 2 Features Supported by XRC for Mainframe ................................................................. 18 3 Number of XRC for Mainframe Session ...................................................................... 19 4 Number of Sessions Per Logical Volume ..................................................................... 19 5 Combinations of ESCON and FICON Paths .........
About this Guide This document describes and provides instructions for performing Hitachi Extended Remote Copy (XRC) for Mainframe operations on the HP storage systems.
Convention Element Blue, underlined text: http://www.hp.com Bold text Website addresses • Text emphasis • UI elements CAUTION: Indicates that failure to follow directions could result in damage to equipment or data. NOTE: Provides additional information.
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About this Guide
1 Overview of Copy Solutions XRC for Mainframe XRC for Mainframe is an asynchronous remote copy feature used for data backup in the event of a disaster. This product is used in mainframe systems and functionally compatible with Extended Remote Copy (XRC). XRC for Mainframe is provided as a program product. It is compatible with System Data Mover (SDM) in DFSMS (Data Facility Storage Management Subsystem), which is common to the XRC environment.
“Using XRC for Mainframe in Conjunction with TrueCopy z/OS” on page 27 for further information on combining XRC for Mainframe with Synchronous operations. This user's guide does not cover TrueCopy z/OS operations. For information and instructions on performing TrueCopy z/OS operations, see the Hitachi TrueCopy™ for z/OS user guide: HP XP12000/XP10000 Disk Arrays and SVS 200, or contact your HP account team.
2 Overview of XRC for Mainframe Operations Function Overview In XRC for Mainframe operations, the data written from the primary host at the primary site is written to the primary volume via cache memory at the primary disk subsystem. At the same time, it is stored on the cache memory as a temporary sidefile. SDM, which is host software typically installed at the secondary site, reads the sidefile data from the primary disk subsystem at the primary site asynchronously via communication lines.
be written to the secondary volumes. Data is written to the secondary volumes in units of session in the same order as it was written at the primary site, not in units of SC session. SDM manages definitions of sessions and SC sessions. They are assigned session IDs and defined in units of logical volume in the disk subsystem. TSO commands The following settings concerning XRC for Mainframe operations are defined by the TSO commands issued to the disk subsystem from the host system.
Figure 2 Channel Extender Connection Configuration Hitachi Extended Remote Copy for Mainframe user guide 15
Overview of XRC for Mainframe Operations
3 Requirements and Restrictions System Requirements XRC for Mainframe operations require hosts and storage systems at both primary and secondary sites, a communications path between the primary subsystem and the secondary host, an XP Remote Web Console PC, and the XRC for Mainframe program product.
NOTE: The following channel extender is supported. Channel extender: CNT Ultranet Storage Director (ATM, IP connections) Line type: ATM lines (Up to 135 Mbps), IP lines (500 Mbps) • XP Remote Web Console PC You must have an XP Remote Web Console PC at the primary site. To use the XP Remote Web Console applet programs including XRC for Mainframe, you must have a web browser. A license key code is also required for using the XRC for Mainframe program product.
NOTE: When the DKC emulation type is 3990-6 or 3990-6E, only the XRC2 function is supported. When the DKC emulation type is 2105 or 2107, XRC2 or XRC3 is supported. The Number of Sessions The following table shows the number of sessions in XRC for Mainframe.
CAUTION: XRC for Mainframe operations, as well as TrueCopy Asynchronous z/OS operations, utilize additional cache to store the sidefile queue of asynchronous recordsets. If you are maintaining XRC for Mainframe pairs and TrueCopy Asynchronous z/OS pairs, consider asynchronous remote copy workloads, and then make sure that your storage system has adequate cache installed and available.
NOTE: The following table shows the operation modes of XRC for Mainframe in conventional models and the corresponding option settings in the storage system. The operation modes setting of XRC for Mainframe in conventional model are invalid in the storage system. Therefore, execute the alternative settings to the operation modes of XRC for Mainframe in conventional model in the Change Option panel of the XRC for Mainframe.
*1 Level 1 Sleep is performed on a logical volume in which a threshold specified by SDM is enabled (Block option). Level 1 Sleep is not performed on the volume for which Donot Block (Volume Level) is specified. NOTE: The behavior of the storage system, which is affected by option settings in the Change Option panel, will also be affected by whether the DonotBlock parameter of the Xaddpair command of SDM is specified. For details, see the following tables.
*1 This setting is impossible when the block option of XRC for Mainframe is set to Volume Level. Table 8 Behavior of the Storage System When the Block Option of XRC for Mainframe is Set to “Cache Level” Option Settings in XRC for Mainframe Options Settings Behavior of the Storage System If DonotBlock is Specified by SDM If DonotBlock is Not Specified by SDM (that is, If Block is Specified by SDM) Enable The subsystem does not control the amount of data to be written to the specified logical volume.
Option Settings in XRC for Mainframe Options Settings Enable Behavior of the Storage System If DonotBlock is Specified by SDM If Donot Block (Volume Level) is enabled, level-2 suspension does not occur when the amount of used sidefile capacity exceeds the level-2 threshold. Also, the subsystem does not report SCP-SCI to the host. If Donot Block (Volume Level) is disabled, level-2 suspension occurs when the amount of used sidefile capacity exceeds the level-2 threshold.
CAUTION: The SC session of the disk subsystem will be terminated automatically when offline replacement of a microcode which requires PS OFF and PS ON, or PS ON after the battery has discharged (volatile PS ON) is performed while XRC for Mainframe is operating. The session of the SDM side of the secondary site will be suspended by the termination, however the RESUME operation may fail.
Using XRC for Mainframe in Conjunction with Other Copy Solutions XRC for Mainframe supports concurrent operations with other copy functions. The following table shows whether this product can share volumes with other copy functions or not.
Figure 3 Double XRC for Mainframe Operations Using XRC for Mainframe in Conjunction with TrueCopy z/OS XRC for Mainframe can be used in conjunction with TrueCopy z/OS to maintain three copies of critical data at your primary and/or secondary sites for disaster recovery purposes.
Figure 5 Configuration in which a Volume is Functioning as XRC for Mainframe S-VOL and TrueCopy z/OS M-VOL Using XRC for Mainframe in Conjunction with ShadowImage z/OS XRC for Mainframe can be used in conjunction with ShadowImage z/OS to maintain data in the secondary site and the primary site for disaster recovery and data migration purposes.
Figure 7 Configuration in which a Volume is Functioning as XRC for Mainframe S-VOL and ShadowImage z/OS S-VOL • Configuration in which one volume is functioning as XRC for Mainframe P-VOL and ShadowImage z/OS S-VOL, and another volume is functioning as XRC for Mainframe S-VOL and ShadowImage z/OS S-VOL The following figure shows the configuration in which one volume is functioning as both an XRC for Mainframe P-VOL and a ShadowImage z/OS S-VOL (source volume) and another volume is functioning as both an XRC
Figure 9 Configuration in Which a Volume is Functioning as XRC for Mainframe P-VOL and Hitachi FlashCopy Mirroring for Mainframe S-VOL • Configuration in which a volume is functioning as XRC for Mainframe S-VOL and Hitachi FlashCopy Mirroring for Mainframe S-VOL The following figure shows the configuration in which a volume is functioning as both an XRC for Mainframe S-VOL (secondary volume) and a Hitachi FlashCopy Mirroring for Mainframe S-VOL (source volume).
Figure 11 Configuration in Which One Volume is Used as XRC for Mainframe P-VOL/Hitachi FlashCopy Mirroring for Mainframe S-VOL and Another Volume is Used as XRC for Mainframe S-VOL and Hitachi FlashCopy Mirroring for Mainframe Hitachi Extended Remote Copy for Mainframe user guide 31
Requirements and Restrictions
4 Preparing for XRC for Mainframe Operations System Configuration To perform XRC for Mainframe operations, you need the storage system, XP Remote Web Console computers, and the XRC for Mainframe program product. Installing the Software The XRC for Mainframe program product must be installed on the storage system at the primary site.
NOTE: For detailed information about how to install and use XP Remote Web Console, see the HP StorageWorks XP Remote Web Console user guide. To end XRC for Mainframe operations, select the Close button ( 34 Preparing for XRC for Mainframe Operations ).
5 XRC for Mainframe Panels This section explains panels for performing XRC for Mainframe operations. When you open the XRC Option panel, the XRC for Mainframe option list is displayed. The XRC Option Panel After you start XRC for Mainframe, the XRC Option panel appears: Figure 12 XRC Option Panel The XRC Option panel displays the following items and enables you to make settings: • XRC for Mainframe option list (at the upper portion in the panel): • CLPR: Displays the CLPR number.
• LV1 Sleep: Displays the setting that is made in Level 1 Sleep in the Change Option panel. • Sleep Time: Displays the time specified in Sleep Time in the Change Option panel. • LV1 SIM: Displays the setting that is made in Level 1 SIM in the Change Option panel. • LV2 Suspend: Displays the setting that is made in Level 2 Suspend in the Change Option panel. • Preset list: Displays settings made in the Change Option panel. The settings displayed in the Preset list are not applied to the subsystem.
• Level 2 Threshold drop-down list: Allows you to select the threshold for the sidefile for reporting SCP-SCI. This threshold is called the SCP-SCI reporting threshold or the level-2 threshold. SCP is an acronym for State Change Pending. SCI is an acronym for State Change Interrupt. The level-2 threshold must be within the range of 30 to 70 percent and must be a multiple of 10 percent (for example, 30, 40, 50, 60, or 70 percent). The default is 50 percent.
Level 1 This level of control will be performed when the sidefile capacity is equal to or larger than the level-1 threshold, and is smaller than the level-2 threshold. If Level 1 Sleep is set to Enable, write I/Os to logical volumes will be put in a wait status by command retry when the sleep wait threshold (for example, level-1 threshold) is exceeded. If Level 1 Sleep is set to Disable, write I/Os to logical volumes will not be put in a wait status.
Depending on the sidefile capacity, the subsystem will perform one of the following four levels of control of the amount of write data: Level 0 This level of control will be performed when the sidefile capacity is smaller than the level-1 threshold. If Level 1 Sleep is set to Enable, write I/Os to logical volumes will be put in a wait status according to the threshold for the number of recordsets per logical volume; the threshold is specified by SDM, and the default threshold is 0x500.
The subsystem will not perform “Sleep” -”Wait” command retry. NOTE: Level 1 Sleep is always set to Disable when Block Option is set to Volume Level. • Sleep Time: Allows you to specify the sleep wait time for “Sleep” -”Wait” command retry. • 10ms: The subsystem will wait 10 milliseconds. • 100ms: The subsystem will wait 100 milliseconds.
6 Performing XRC for Mainframe Operations This chapter explains how to perform XRC for Mainframe operations. The XRC for Mainframe operations are: • Setting XRC for Mainframe Options, page 41 • Changing Settings in the Preset List, page 42 • Deleting Settings from the Preset List, page 43 Setting XRC for Mainframe Options To set XRC for Mainframe options: 1. From the XRC for Mainframe option list in the XRC Option panel, select and right-click the CLPR on which you want to make option settings.
4. When you finish setting XRC for Mainframe options, select OK. The Change Option panel closes. The option settings are displayed in the Preset list of the XRC Option panel. The option settings are displayed in blue, bold and italics in the XRC for Mainframe option list. Figure 16 Confirmation Panel to be Displayed When the “The same setting is applied” Check Box is Selected 5. Select Apply. Depending on your settings, a confirmation panel may appear and inform you that a pair will be suspended.
2. From the pop-up menu, select Modify. The Change Option panel appears. 3. In the Change Option panel, change XRC for Mainframe options. 4. When you finish setting XRC for Mainframe options, select OK. The Change Option panel closes. The resulting option setting is displayed in the Preset list of the XRC Option panel. The operation for changing a setting in the Preset list is finished. Deleting Settings from the Preset List To delete a setting from the Preset list in the XRC Option panel: 1.
Performing XRC for Mainframe Operations
7 Troubleshooting Troubleshooting For detailed information about how to remove errors during XRC for Mainframe operations, see the HP StorageWorks XP Remote Web Console error codes: HP XP12000 Disk Array, HP XP10000 Disk Array, HP 200 Storage Virtualization System. NOTE: For detailed information about how to remove XP Remote Web Console errors, see the HP StorageWorks XP Remote Web Console user guide.
Troubleshooting
Index A audience, 7 C calling technical support, 45 conventions document, 7 storage capacity values, 8 text symbols, 8 D T technical support HP, 8 service locator website, 9 text symbols, 8 troubleshooting, 45 W websites HP, 9 HP Subscriber's Choice for Business, 9 product manuals, 7 document conventions, 7 related documentation, 7 documentation HP website, 7 providing feedback, 9 H help obtaining, 8 HP technical support, 8 I installation requirements, 17 R related documentation, 7 S storage capaci
