HP XP P9000Watch and HP XP P9000Sketch Reference Guide HP Part Number: T1789-96341 Published: February 2013 Edition: 1
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Contents 1 Introduction to HP XP P9000Watch...............................................................6 Overview................................................................................................................................6 HP XP P9000Watch environment................................................................................................7 Functional representation...........................................................................................................
P-VOL S-VOL LDEV performance metrics............................................................................43 P-VOL S-VOL RAID Group performance metrics..................................................................43 P-VOL S-VOL CLPR performance metrics............................................................................44 P-VOL S-VOL Port performance metrics..............................................................................44 CA Journal Metrics....................................
Average read response time................................................................................................71 Average write response time................................................................................................71 9 Support and other resources......................................................................72 Contacting HP........................................................................................................................72 Related information...
1 Introduction to HP XP P9000Watch This chapter describes the features of HP XP P9000Watch (previously called P9000Watch) and the environment required to run it. Overview HP XP P9000Watch is a command-line interface utility provided with HP XP P9000 Performance Advisor. It is designed for focused troubleshooting and can capture data as frequently as every 5 seconds. NOTE: The 5 seconds data capture frequency applies to XP or P9000 disk array configured with any number of LDEVs.
• Customizable menu size • Nicknames can be provided to the host groups for easy identification • Command-line tool with easy-to-use selection menu • Configuration changes that are reflected with every fresh run • Small footprint and easy to execute, does not require any special installation For more information on installing the HP XP P9000 Performance Advisor, see the HP XP P9000 Performance Advisor Installation Guide.
2 Installing HP XP P9000Watch This section describes installing and removing HP XP P9000Watch. It also describes the various components of HP XP P9000Watch. Prerequisites The following are the prerequisites to install HP XP P9000Watch: • The HP XP P9000 Performance Advisor host agent (v5.5 and above) must be installed on your host system. • The host must have a command device connected to the XP or P9000 disk arrays array to collect information from that disk array.
Figure 2 HP XP P9000 Performance Advisor logon screen 3. Enter your User Name and Password and click Sign In. The HP XP P9000 Performance Advisor Home screen appears. Figure 3 shows the HP XP P9000 Performance Advisor Home screen. Figure 3 HP XP P9000 Performance Advisor home screen 4. 5. On the Header menu, select Support. The screen displaying Table of Contents appears. From the Tools menu, select the operating system for which you want to download the HP XP P9000Watch zip file.
6. 7. Extract the contents of the zip file to a location on your system. The XPWatch.exe and wagent.exe files are extracted. Double-click XPWatch.exe to run HP XP P9000Watch. You can also run HP XP P9000Watch using the command prompt. For example, c:\XPWatchTool\XPWatch.exe where, XPWatchTool is the folder containing the XPWatch.exe file. In your command-prompt window, ensure that you point to the directory where HP XP P9000Watch is installed.
mode. There are three different commands that can be used. The entire command should be entered at the command prompt, without which HP XP P9000Watch will exit. For more information on the commands to execute HP XP P9000Watch in CLI mode, see “Executing commands in CLI mode” (page 18). Removing HP XP P9000Watch To remove HP XP P9000Watch, delete the folder containing the XPWatch.exe file.
Components The software components of HP XP P9000Watch are: 12 • XPWatch.exe — is an executable file used to launch the HP XP P9000Watch tool. • wagent.exe — is an executable file required to operate HP XP P9000Watch. • XPWatch.log — stores information about the execution cycle of HP XP P9000Watch when the debug mode is enabled. • settings.ini — this file contains the default or customized menu settings. It is generated after the first use of HP XP P9000Watch.
• .csv — is the output file that saves performance data. In the Interactive mode, the .csv files are generated depending on the configured settings. However, in the CLI mode, these files are generated every hour. For every hour different .csv files are created, one file for each component. For better understanding, consider the following two scenarios: Example scenario 1: In the Interactive mode, if you set the Data Split Time to two hours and the Data Collection Time Limit to six hours, three sets of .
– -PVOL_SVOL_CLPRPERF-.csv – -PVOL_SVOL_LDEVPERF-.csv – -PVOL_SVOL_RGPERF-.csv – -JNL_CLPRPERF-.csv – -JNL_LDEVPERF-.
Host Group metrics ◦ – -LDEVPERF-.csv – -PORTPERF-.csv – -RGPERF-.csv – -CPUPERF-.csv – -DKCPERF-.
3 Working with HP XP P9000Watch menus and commands This section describes how to use the different modes, commands, menus, and interfaces of HP XP P9000Watch. Commands This section describes the menus and the options you choose in the Interactive mode, as well as the commands that you execute in the CLI mode. To see the Help options in the Interactive mode and CLI mode, the following command can be executed in the command prompt: For Windows platform, xpwatch.exe –h For a non-Windows platform, .
Figure 4 HP XP P9000Watch commands Table 1 lists the Navigation options available in the HP XP P9000Watch interface and their functions. Table 1 Navigation options and their functions Command Option Function b Back To view the previous menu. c Continue To view the next menu. n Next page To view the next set of items, such as host groups, ports, RAID groups, and LDEVs. p Previous page To view set of items, such as host groups, Ports, RAID groups, and LDEVs displayed on the previous page.
Table 3 lists the Miscellaneous options available in the HP XP P9000Watch interface and their functions. Table 3 Miscellaneous options Command Option Function s Settings To change the settings of HP XP P9000Watch. x Nickname Menu To view the Nickname menu. Executing commands in CLI mode NOTE: If none of the below mentioned commands are provided, HP XP P9000Watch is executed in the Interactive mode. Syntax conventions Table 8 lists the symbols that are used to depict command syntax.
—hrs This parameter is used to specify the number of hours for which HP XP P9000Watch must be active. —min This parameter is used to specify the number of minutes for which HP XP P9000Watch must be active. NOTE: It is mandatory to specify either the —hrs or —min option. You can also specify both the options. .
./xpwatch –c –s –w [–f ] [–a ] –hrs —min —c To view the HP XP P9000Watch in CLI mode. —s To specify the XP or P9000 disk array serial number. —w To view the list of WWNs in the comma separated format. NOTE: There should be no space in between the comma separating the WWNs. For example, —w 500143800081fba0, 5001438000ac164c —f This is an optional parameter.
The Array menu also displays the HP XP P9000Watch version. You can also view the HP XP P9000Watch version using the following command in the command prompt: XPWatch.exe -v To select an array, enter the number (Num) corresponding to it. For example, to select a P9000 disk array that belongs to the P9500 disk array model, enter 3. NOTE: You can select only one array at a time. Figure 5 shows the Array menu. Figure 5 Array menu Table 5 lists the fields of the Array menu.
The Sync/Async Metrics provides configuration information for each P-VOL and S-VOL which includes data displayed in the following table: Screen field Description Num Selection Number. Sel S against a P-VOL or S-VOL record indicates that the particular record is selected. Pri Ser# Serial number of the XP or P9000 disk array. Ldev LDEV configured as P-VOL or S-VOL on the selected disk array (primary data center). Displays the LDEV number in cu:ldev format.
Viewing Sync/Async metrics To view the Sync/Async metrics for P-VOLs and S-VOLs: 1. Start HP XP P9000Watch. The Array menu appears. 2. Select the array whose performance you want to monitor, and then press the Enter key. The following list of host group options connected to the array is displayed: 3. 4. • 1 Sync/Async Metrics • 2 CA Journal Metrics • 3 Host Group Metrics Select 1, and then press the Enter key.
This metrics provide configuration information of each P-VOL or S-VOL, and includes the configuration data of journal groups configured to manage the corresponding I/O transactions. The following table describes the configuration data: Screen field Description CTG Consistency Group ID: A Group ID which guarantees consistency in the sequence of Asynchronous data transfers for a remote copy volume group. Sel S against a P-VOL or S-VOL record indicates that the particular record is selected.
1. 2. 3. 4. Start HP XP P9000Watch. The Array menu appears. Select the array whose performance you want to monitor and press the Enter key. The following list of host group options connected to the array is displayed: • 1 Sync/Async Metrics • 2 CA Journal Metrics • 3 Host Group Metrics Select 2, and then press the Enter key. The list of LDEVs configured as P-VOLs and S-VOLs in the selected XP or P9000 disk array are displayed along with the corresponding Consistency Group Ids.
Figure 8 Available Host Groups: Sorted Alphabetically Table 6 lists the fields in the Host Groups. Table 6 Host Groups — fields Screen field Description Num Selection number Nickname User-friendly names given to the hosts. Host Group Name Displays the host group name. Ports The port used by the XP or P9000 disk array to communicate with the host. Viewing Host Groups To view the host groups connected to an array, perform the following steps: 1. Start HP XP P9000Watch. The Array menu appears. 2.
NOTE: The selected host group is highlighted in green. Figure 9 shows one host group selected from the list of available host groups. Figure 9 Available Host Groups: One Host Group selected 2. Enter 118 and press the Enter key. The Kalam host group is selected. Figure 10 shows two host groups selected from the list of available host groups.
Figure 10 Available Host Groups: Two Host Groups selected Clearing Host Groups To clear a selected host group, enter its corresponding number. For example, to clear the Kalam host group, enter 118 and press the Enter key. The Kalam host group is cleared. Figure 11 shows the screen that appears after clearing the Kalam host group.
Figure 11 Clearing a Host Group NOTE: The cleared host groups are not highlighted in green. Nickname menu The Nickname menu enables you to provide a nickname to the host to identify the host easily. For example, you can identify a host that is known by FS-Pyramus as “PA_Watch_HA”. NOTE: • The Nickname menu can be accessed only from the host groups screen. • The nicknames must be provided when the HP XP P9000Watch is launched for the first time after installation.
Figure 12 Nickname menu Assigning nicknames This section describes how to assign nicknames to a host group. For example, to assign a nickname to the FS-Pyramus host group, perform the following steps: 1. Navigate to the Available Host Groups screen. 2. Type x. The following screen appears. Figure 13 Nickname menu: Selecting a host group to assign nickname 3. 4. 30 Type 97 and press the Enter key. Enter the new nickname. For example, PA_Watch_HA.
Figure 14 Nickname menu: Entering new nickname 5. Press the Enter key. The following screen, showing nickname as PA_Watch_HA, appears. Figure 15 Nickname menu: Displaying new nickname Renaming nicknames To rename a nickname, perform the following steps: 1. Select the host group whose nickname you want to rename and press the Enter key. 2. Enter the new nickname and press the Enter key.
Deleting nicknames To delete a nickname, select the host group whose nickname you want to remove and press the Enter key twice. For example, to remove the PA_Watch_HA nickname, perform the following steps: 1. On the Available Host Groups screen, type 97. The following screen appears. 2. Press the Enter key. (Do not enter any new nickname) The Host Nickname is removed and the following screen appears.
Port menu The Port menu lists all the ports that are connected to the selected host groups. This menu is used to select the port whose performance needs to be monitored or captured. Figure 16 shows the Port menu. Figure 16 Port menu Table 7 describes the fields that appear in the Port menu.
Viewing Port menu To view the ports connected to a host, perform the following steps: 1. Start HP XP P9000Watch. The Array menu appears. 2. Select the array whose performance you want to monitor and press the Enter key. 3. The Available Host Groups screen displaying the list of host groups connected to the array appears. 4. Select the required host and enter the c command. The Port menu showing all ports connected to the hosts is appears.
Figure 18 RAID Group menu Table 8 describes the fields that appear in the RAID Group menu.
Figure 19 LDEV menu Table 9 describes the fields that appear in the LDEV menu. Table 9 LDEV menu — screen fields Screen field Description Num Selection number LDEV CU: LDEV number RG RAID group Emulation Emulation type Slpr SLPR number NOTE: Slpr does not exist in the P9000 disk arrays. So, the Slpr field displays N/A for the P9000 disk array in the output screen of the LDEV menu.
Figure 20 Settings menu Menu settings Menu settings enable you to modify the settings of the interface. For example, the Menu settings allow you to modify the appearance of the menus. Table 10 describes the Menu settings. Table 10 Menu settings Settings Functions Default Value Valid Range Menu Height Changes the number of items that appear in the menu. 20 lines 1-50 lines Debug Mode Disabled • If this mode is enabled, the program creates a file XPWatch.
Table 11 Performance data collection settings Settings Functions Default value Data Split Time Splits the data according to the time intervals (in hours) and stores 24 hours them in different .csv files. This is used when large amount of data is collected. For example: If you have selected the Data Split Time as 1 and the Data Collection Time Limit as 12, HP XP P9000Watch will create 12 new files, each containing performance data for an hour’s time.
4 Viewing performance metrics in HP XP P9000Watch This section describes how to collect the performance data of the XP and the P9000 disk arrays and view the performance metrics using HP XP P9000Watch. Collecting performance metrics This section describes how to collect performance data of the XP and the P9000 disk arrays using HP XP P9000Watch. The Array menu appears after you invoke HP XP P9000Watch. To collect the performance data of the XP and the P9000 disk arrays: 1. Start HP XP P9000Watch. 2.
3. 4. Select the required port. Enter the c command. The Pick LDEVs/RAID Groups Selection Scheme appears. • Filtering LDEVs by RAID Groups Follow this procedure to filter LDEVs by RAID groups: a. Enter 1 to select this option. The RAID groups within the host groups are displayed. b. Select the required RAID groups. c. Enter the c command. The LDEVs within the RAID groups are displayed. d. Select the required LDEVs. e. Enter the c command.
• Skip and start collecting Follow this procedure to skip all the selection process and collect performance data for all the ports: a. Enter 4 to select this option. The following message appears: Would you like to archive the performance data collected? (Y/N) b. Enter Y to save the performance data in .CSV format. The Output screen appears. NOTE: The Output screen displays performance data of all selected ports and processors belonging to the selected XP or P9000 disk arrays. c.
Sync/Async Metrics The Sync/Async Metrics provides the configuration data of the selected P-VOLs and S-VOLs in the disk array. In addition, it includes performance metrics of the following components: • LDEVs configured as P-VOLs or S-VOLs. • Continuous access ports configured for the synchronous or asynchronous communication. The performance data is displayed for all the continuous access ports irrespective of whether you view the Sync/Async metrics or the CA Journal metrics.
Table 12 P-VOL S-VOL Configuration (continued) Configuration data Description Raid RAID classification for the RAID group. Type RAID type for the RAID group. CLPR CLPR associated with the P-VOL or S-VOL. Port Port that establishes communication between the host and P-VOL or S-VOL. P-VOL S-VOL LDEV performance metrics Table 13 (page 43) describes the performance metrics of P-VOLs and S-VOLs.
Table 14 PVOL SVOL RAID Group performance metrics Performance metrics Unit Description RG number RAID group identifier. AvgIO number Average Front-end I/Os. Wr% % Average Write percentage. Seq% % Average Sequential I/O percentage. r_H% % Average Read Cache Hit percentage. kB/IO KB/IO Average I/O size. KB/s KB/s Average Throughput. ms ms Average I/O Response time within back-end array. r_ms ms Average Read Response time. w_ms ms Average Write Response time.
Table 16 P-VOL S-VOL Ports performance metrics Performance metrics Unit Description Port number Port name. Slot string Slot number. Mode string Communication mode configured for the port, can be a MCU or RCU. MCU refers to the Master port that is configured to send I/Os to the RCU (Receiver port) residing on the remote data center disk array. RCU is configured to only receive I/Os from the MCU residing on the remote data center disk array.
• CLPRs associated with the journal groups • Ports configured for the continuous access journal group. The performance data is displayed for all the continuous access ports irrespective of whether you view the Sync/Async metrics or the CA Journal metrics. The Output screen and the seven .
Table 17 JNL metrics Performance metrics Unit Description JID number Journal group ID on the XP or the P9000 disk array. Size[MB] number Size of the LDEV in MB. Ldev # number cu:ldev ID configured as the journal volume. State string State of the journal group, can be one of the following: • NONE: The JID does not exist on the XP or the P9000 disk array. • SMPL: The journal volume does not have a pair. • PJNN: P-VOL Journal Normal Normal.
Host Group metrics The Host Group metrics include performance metrics for the selected disk array and the following additional components: • Array • Host groups • Ports • LDEVs • RAID groups • CPU • DKC The Output screen and the seven output files .csv files that are generated, one file for each component, contain performance metrics pertaining to host groups, ports, LDEVs, RAID groups, CPU, DKC, and Array utilization of the selected XP or P9000 disk arrays.
Figure 23 Output screen for a XP disk array Figure 24 shows the Output screen for a P9000 disk array.
Figure 24 Output screen for a P9000 disk array Array Performance Metrics Table 14 describes the Array performance metrics.
Host Group performance metrics Table 15 describes the Host Group performance metrics. Table 19 Host Group performance metrics Performance metrics Unit Description Host Group string Host Group name Avg IO number Average Front-end I/O per second over the collection update interval, which is set to a default value of 10 seconds. Avg MB MB/s Average throughput over the collection update interval, which is set to a default value of 10 seconds.
Table 21 LDEV performance metrics (continued) Performance metrics Unit Description r_H% % Average Read Cache Hit percentage KB/IO KB/IO Average I/O Size KB/s KB/s Average Throughput ms ms Average I/O Response time r_ms ms Average Read Response time w_ms ms Average Write Response time ms^ ms Maximum of (Maximum Read Response time and Maximum Write Response time) r_ms^ ms Maximum Read Response time w_ms^ ms Maximum Write Response time FeD number Front-end I/O Density [IOPS/GB]
Table 22 RAID group performance metrics (continued) Performance metrics Unit Description FeD number Front-end I/O Density [IOPS/GB] Be/Fe number Back-end / Front-end I/O ratio RG% % Average RAID group I/O utilization Be number Back-end I/O CPU performance metrics Table 23 describes the CPU performance metrics. Table 23 CPU performance metrics Performance metrics Unit Description Ser number Serial number of the array Slot string CH slot number.
Table 23 CPU performance metrics (continued) Performance metrics Unit Description MP4 number For an XP disk array, MP4 is the CHA PCB Busy Time for CPU 4 (if installed). MP5 number For an XP disk array, MP5 is the CHA PCB Busy Time for CPU 5 (if installed). MP6 number For an XP disk array, MP6 is the CHA PCB Busy Time for CPU 6 (if installed). MP7 number For an XP disk array, MP7 is the CHA PCB Busy Time for CPU 7 (if installed).
5 Introduction to HP XP P9000Sketch This section gives an overview of HP XP P9000Sketch. Overview HP XP P9000Sketch is a tool provided by HP to enable you to view the performance metrics of different components of an XP or a P9000 disk array in a graphical format. The performance metrics obtained on monitoring the selected XP or the P9000 disk array’s host groups, ports, LDEVs, RAID, CPU, and DKC Groups including the array level metrics for a specified duration are stored in seven comma-separated files (.
6 Installing HP XP P9000Sketch This chapter lists the supported environment for HP XP P9000Sketch (previously called XPSketch) and describes the installation for HP XP P9000Sketch. Supported Windows platforms For information on the list of supported platforms, see the latest HP XP P9000 Performance Advisor Software OS Support Matrix available at www.hp.com/go/PerformanceAdvisor-support-docs. NOTE: • Use Microsoft Internet Explorer (IE) 7.0 when using Windows 2008 and IE 6.
NOTE: When you double-click Run.bat, sometimes HP XP P9000Sketch might not start immediately, or might appear and disappear immediately. This is because the system searches for the JRE files that are required to start HP XP P9000Sketch. By default, the JRE path is automatically set. However, to verify the path, complete the following steps: a. On your system, right-click My Computer, and select Properties from the pop-up menu that appears. b. On the System Properties window, click the Advanced tab. c.
7 Viewing performance metrics in HP XP P9000Sketch This section describes loading the .csv files, setting the Java heap size value, and viewing performance metrics in HP XP P9000Sketch. Loading the Comma separated file The performance metrics obtained on monitoring the selected XP or the P9000 disk array’s host groups, ports, LDEVs, RAID, CPU, and DKC groups including the array level metrics for a specified duration are stored in seven .csv files, one file for each component. The .
for viewing, more is the memory required for plotting the numerous data points from the selected metrics. Figure 25 shows the error message that is displayed when the metric count in the .csv file is higher compared to the Java heap size value specified in run.bat. Figure 25 Error message NOTE: • Ensure that the size of the CSV file to be loaded is not more than the configured heap size. • The maximum Java heap size that can be configured depends on the operating system specification.
Time of the samples displayed in the Graph Area. The Status bar displays the location of the CSV file. Figure 27 shows multiple graphs plotted for multiple metric selection. Figure 27 Multiple graphs plotted for multiple metric selection You can also view the Metrics Available, Samples Available, and Samples Displayed data for the CSV file that is currently loaded in HP XP P9000Sketch. Point to a location on the Metrics label, as shown in Figure 28.
Understanding performance metrics in HP XP P9000Sketch This section describes the Array, Host Group, Port, LDEV, RAID, CPU, DKC Group, and continuous access journals performance metrics.
Table 28 LDEV performance metrics Performance Metrics Description AvgIO (TotalRd + TotalWr) Average Front-end I/Os Write Ratio % Average Write percentage Sequential IO ratio % Average Sequential I/O percentage Read hits % for LDEV Average Read Cache Hit percentage Throughput [KB/s] Average Throughput IO response time [ms] Average I/O Response Time Back-end to Front-end IO ratio [%] Back-end / Front-end I/O ratio LDEV Utilization % for LDEV Average LDEV I/O utilization Cache lines staged/de
Table 30 CPU performance metrics Performance Metrics Description Minimum Utilization[%] Minimum CPU utilization on PCB[%] Maximum Utilization[%] Maximum CPU utilization on PCB[%] Average Utilization[%] Average CPU utilization on PCB[%] Utilization for MP 0 0[1/s] CHA PCB Busy Time for CPU 0(if installed) Utilization for MP 1 0[1/s] CHA PCB Busy Time for CPU 1(if installed) Utilization for MP 2 0[1/s] CHA PCB Busy Time for CPU 2(if installed) Utilization for MP 3 0[1/s] CHA PCB Busy Time for C
Table 33 JNL performance metrics 64 Performance Metrics Description Journal State for JID# Journal State for JID# Journal Utilization Percentage [%] JID# Journal Utilization Percentage [%] JID# Q-Count JID# Q-Count JID# Q-Marker JID# Q-Marker JID# Ldev Utilization Percentage [%] JID# Ldev Utilization Percentage [%] JID# Raid Group Utilization Percentage [%] JID# Raid Group Utilization Percentage [%] JID# Viewing performance metrics in HP XP P9000Sketch
8 Working with charts in HP XP P9000Sketch This section describes viewing, modifying, saving, and printing charts in HP XP P9000Sketch. It also describes restoring the auto range settings on the chart. Viewing charts You can zoom in or zoom out on a chart on either the Domain Axis, Range Axis, or both. To zoom in, on the Options menu, point to Zoom In and select one of the following options: • Both— Select this option if you want to zoom in on both Domain Axis and the Range Axis.
NOTE: menu. 2. You can also right-click anywhere the chart, and select Properties from the pop-up On the Chart Properties window, you can modify the following: • • Under the Title tab: ◦ Change the chart title, font type, and color settings. ◦ Clear the Show Title checkbox if you do not want the chart title to be displayed. Under the Plot tab: ◦ Go to Appearance tab to change the appearance and orientation of the chart.
A HP XP P9000Watch use case scenarios Scenario 1: Port I/O spike Business case Periodic port I/O spikes are observed in P9000 Performance Advisor. Objective Locate the offending host group/application. Resolution HP XP P9000Watch can be used to find the hot spot by collecting the performance data for very short intervals, such as, 10 seconds. Perform the following steps to find the hot spot: 1. Select the affected port (You can find the affected port using HP XP P9000 Performance Advisor). 2.
Results By studying the HP XP P9000Watch metrics, you can analyze the amount of load on the XP or the P9000 disk array and the response time for I/Os from the host. This data can be correlated with the application performance.
B Understanding write ratio in HP XP P9000Watch The following screen shows the performance of the entire RAID group 01-04 being collected with the performance of LDEVs 01:6c, 01:6d, 02:a3, 02:a4, and 02:a5. The LDEVs in RAID group 01-04 are exposed only through port 1A. There are no I/O activities or LDEVs reported on this port because there is no I/O activity in port 1A and these LDEVs are not visible through any other port.
C Relationship between LDEV I/O response time and Write ratio We cannot establish a relationship between the LDEV I/O response time and Write ratio because: • LDEV I/O response time is dependent on both front-end reads and front-end writes. • Write ratio provides only the write percentage in the I/Os. NOTE: The LDEV I/O response time shown by HP XP P9000Watch is the average I/O response time measured in milliseconds (that is, both reads and writes together are responsible for variations in this value).
D Comparing LDEV response time metrics in HP XP P9000 Performance Advisor and HP XP P9000Watch Maximum values of LDEV response time in HP XP P9000 Performance Advisor and HP XP P9000Watch The maximum values of LDEV response time in P9000 Performance Advisor cannot be compared with the response time values in HP XP P9000Watch because HP XP P9000 Performance Advisor displays the I/O response time as separate metrics for read and write, respectively.
9 Support and other resources Contacting HP HP technical support For world wide technical support information, see the HP support website: http://www.hp.
Websites • HP.com http://www.hp.com • HP Storage http://www.hp.com/go/storage • HP Manuals http://www.hp.com/support/manuals • HP download drivers and software http://www.hp.com/support/downloads • HP Software Depot http://www.software.hp.
Typographic conventions Table 34 Document conventions Convention Element Blue text: Table 34 (page 74) Cross-reference links and email addresses Blue, underlined text: http://www.hp.
Glossary A Array Control Processor (ACP) ACP is used in the XP disk arrays prior to the XP24000 Disk Array. With the introduction of the XP24000 Disk Array, the DKA has replaced ACP. The DKA is also applicable for the P9000 disk arrays. ACP handles the transfer of data between the cache and the physical drives held in the DKUs. The ACPs work in pairs, providing a total of eight SCSI buses. Each SCSI bus associated with one ACP is paired with a SCSI bus on the other ACP pair element.
Command View AE (CV AE) Command View Advanced Edition Suite Software replaces the XP Command View Software to manage the XP and P9000 disk arrays. Continuous Access Journal (Cnt Ac-J) Continuous Access Journal Software is an asynchronous mirroring program similar to the Continuous Access Asynchronous, except that the transactions to be written to the secondary disk array are maintained in a disk-based journal file.
G Globally unique identifier (GUID) It is a special type of identifier used in the software applications to provide a unique reference number. The value is represented as a 32 hexadecimal character string, such as the {21EC2020-3AEA-1069-A2DD-08002B30309D} and usually stored as a 128 bit integer. H HDD Hard Disk Drive Hewlett-Packard Authorization Center (HPAC) The Hewlett-Packard Authorization Center license key website (http://webkey.external.hp.
R RAID group A group of disks configured to provide enhanced redundancy, performance, or both. Specifically, four or eight physical hard disk drives (HDDs) installed in a disk array and assigned a common RAID level. RAID Manager Library (RML, RMLIB) The RAID Manager Library is an API library that enables third-party software products to directly operate some of the functions on the P9000 and XP disk arrays. Read/Write (R/W) Read-write access. S S-VOL Secondary or remote volume.
Index A Archival Frequency, 38 Array menu, 20 Average read response time, 71 write percentage, 69 write response time, 71 C Collection Update Interval, 38 conventions document, 74 text symbols, 74 D Data Collection Time Limit, 38 Data Split Time, 38 document conventions, 74 prerequisites, 72 related documentation, 72 documentation providing feedback, 72 F feedback documentation, 72 H help obtaining, 72 Host Groups clearing host groups, 28 screen, 25 selecting host groups, 26 viewing host groups, 26 HP t
R RAID group Filtering RAID groups by LDEVs, 40 menu, 34 performance metrics, 52 Real-Time Monitor Size, 38 related documentation, 72 S Subscriber's choice, HP, 72 symbols in text, 74 T technical support HP, 72 service locator website, 73 text symbols, 74 W websites HP , 73 HP Subscriber's choice for business, 72 80 Index
