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	文章列表 - ES310

	ES310-chapter9:RAID Manager Architecture
	<DIV>Upon completion of this module,you should be able to :<BR>Discuss the features and benefits of the RAID Manager software<BR>Define the terms(Logical unit,Drive group,RAID module)<BR>Discuss hot spare usage<BR>Describe the data reconstruction process<BR>Describe RAID Manager device naming conventions<BR>Define caching control options</DIV> <DIV> </DIV> <DIV>RAID Manager Components and Features<BR>Major components<BR>  User interfaces<BR>  RAID Manager(RM) engine<BR>  Redundant dual active controller(RDAC) driver<BR>RAID Manager features<BR>  Solstice DiskSuite compatible features<BR>  Volume Manager compatible features<BR>  Unsupported features</DIV> <DIV> </DIV> <DIV>A drive group is a set of physical drives in a particular RAID module.Drive groups define a pool of space in which all the logical volumes are of the same RAID level,the RAID level of the drive group. In addition, when the host system has access to the drives through two controllers, load balancing between the controllers is achieved though sharing drive groups between controllers. Drive groups are defined from the Configuration window.</DIV> <DIV> </DIV> <DIV>The LUN configuration information is stored redundantly on three disk drives in the configuration. The location of these drives is not known to the user and is managed by the controllers. The LUN information is not user accessible. It is visible only through the RM6 Configuration Manager application</DIV> <DIV> </DIV> <DIV>The drive group that contains LUN 0 will always be drive group 1. If LUN 0 is removed from group 1,and all the other LUNs are being used, and a new LUN is added to group 3(because there was unused disk space in that group), then when LUN 0 is added to group 3 it will become group 1. Drive group 2 will contain the next lowest numbered LUN.</DIV> <DIV> </DIV>
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	发表于:2006-09-05 ┆ 阅读(619) ┆ 评论(0)

	ES310-chapter8:SSVM Performance Management
	<DIV>Upon completion of this module, you should be able to:<BR>Describe how data assignment planning can improve system performance<BR>List the volume configurations that can improve read and write performance<BR>List the SSVM commands that are used to gather performance information<BR>Describe the three types of RAID5 write procedures<BR>List the three types of RAID5 write procedures in order of performance efficiency</DIV> <DIV> </DIV> <DIV>Performance Guidelines<BR>Several strategies can be used to optimize volume performance including:<BR>Assigning data to physical drives so that the I/O load is balanced amont them<BR>Increasing the access bandwidth to data by using striping,mirroring or RAID5<BR>Increasing the access bandwidth to data by cabling across system boards and controllers</DIV> <DIV> </DIV> <DIV>To provide potimal read performance for different types of mirrored volumes, SSVM supports the following read policies:<BR>1,The round-robin read policy(round)<BR>Read requests to a mirrored volume are satified in a round-robin manner from all plexes in the volume.This is selected when there is no signficant performance advantage by using any particular mirror<BR>2,The preferred-plex read policy(prefer)<BR>Read requests to a mirrored volume are satisfied from one spedific plex(presumably the plex with the highest performance),unless that plex has failed<BR>3,The default read policy(select)<BR>The appropriate read policy is automatically selected for the configuration; for example, selecting preferred-plex when there is only one striped plex associated with the volume and round-robin in most other cases</DIV> <DIV> </DIV> <DIV>Performance Monitoring<BR>The SSVM software continuously gathers statistical information which can be evaluated using:<BR>The vxstat command<BR>The vxtrace command</DIV> <DIV> </DIV> <DIV>Performance Analysis<BR>The SSVM performance analysis process includes the following steps:<BR>1,Resetting the existing data……
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	发表于:2006-09-05 ┆ 阅读(632) ┆ 评论(0)

	ES310-chapter7:SSVM Advanced Operations
	<DIV>Upon completion of this module, you should be able to:<BR>Move an empty disk to a different disk group<BR>Move a populated disk to a new disk group<BR>Perform a snapshot backup<BR>Move a disk group between systems<BR>Assign and remove hot spares<BR>Enable and disable hot relocation<BR>Create a striped pro volume with a file system</DIV> <DIV> </DIV> <DIV>Evacuating a Disk<BR>If a disk begins to fail, its contents can be easily moved to another disk providing the following is true:<BR>The new disk is in the same disk group<BR>The new disk does not contain conflicting objects<BR>The new disk has sufficient free space</DIV> <DIV> </DIV> <DIV>Before starting the evacuation process, you should:<BR>Find out what volume the failing plex is associated with and name of the disks that are associated with it<BR>Find out the disk group associated with the failing disk drive<BR>Determine if any other volumes are associated with the failing disk drive<BR>Find a new disk with enough free space to perform the evacuation<BR>Check for any volume conflicts associated with the new disk</DIV> <DIV> </DIV> <DIV>If the disk you want to move contains an active volume and you do not care if the data is lost, you must:<BR>1,Unmount a related file system and disable any related applications<BR>2,Stop the volume<BR># vxvol stop volume_name<BR>3,Delete the volume configuration<BR># vxedit -r rm volume_name<BR>4,Remove the disk from the disk group<BR># vxdg rmdisk disk_name<BR>5,Add the disk to a different disk group<BR># vgdg -g new_dg adddisk new02=c1t3d0</DIV> <DIV> </DIV> <DIV>Hot Devices<BR>Automatic replacement of failed disk drives by assigned spares can be assomplished using either:<BR>An older hot spare daemon, vxsparecheck<BR>A new hot relocation daemon, vxreload<BR>Depending on how the /etc/rc2.d/S95vxvm-recover file is configured, either the older hot spare daemon, vxsparecheck ,will start at boot time or the newer hot relocation daemon, vxreload, wil……
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	发表于:2006-09-04 ┆ 阅读(578) ┆ 评论(0)

	ES310-chapter6:SSVM Volume Operations
	<DIV>Upon completion of this module, you should be able to :<BR>Create simple, striped, and RAID-5 volumes<BR>Remove a volume<BR>Add a mirror to a volume<BR>Remove a mirror from a volume<BR>Resize a volume(make it larger)<BR>Display properties of a volume<BR>Display volume mapping<BR>Add a file system to a volume<BR>Add a dirty region log to a mirrored volume<BR>Add a log to a volume</DIV> <DIV> </DIV> <DIV>Disk Group Review<BR>When designing and administering disk groups, you should be familiar with the following:<BR>Disk groups have two primary functions<BR>The rootdg disk group should be small <BR>Disk groups should have unique names<BR>A disk group should have at least two disks<BR>Moving populated disks requires care</DIV> <DIV> </DIV> <DIV>Disk Group Requirements<BR>1,All disk groups across all systems should have unique names<BR>2,All disk groups which reside on one host must have unique names<BR>3,Each system must have a disk group named rootdg<BR>4,In general, the rootdg disk group should be kept small<BR>5,All disk groups must contain at least one disk</DIV> <DIV> </DIV> <DIV>Researched Space Allocation<BR>It is frequently better to spend some time analyzing free disk space before creating a volume. Look for patterns of free space that fit your needs. Examples of some commands that can be used to research free space in a disk group are:<BR># vxdg free<BR># vxassist maxsize</DIV> <DIV> </DIV> <DIV>The simplest form of the command used to create a volume is:<BR># vxassist make vol02 50m</DIV> <DIV> </DIV> <DIV>File system cluster size<BR>You can set the maxconfig parameter for a file system to control the file system I/O cluster size. This parameter specifies the number of 8K blocks that will be culstered together on a write to the disk. The default is 7, which equals 56Kbytes.<BR>To optimize for sequential performance, set maxconfig to(number of spindles in the stripe*the stripe unit size) / the file system block size(8Kby……
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	发表于:2006-09-04 ┆ 阅读(598) ┆ 评论(0)

	ES310-chapter5:SSVM Basic Operations
	<DIV>Upon completion of this module, you should be able to :<BR>Define the function and relationship of SSVM objects<BR>Display properties of SSVM objects<BR>Initialize a disk drive for SSVM use<BR>Create a disk group and add disks to it<BR>Rename a SSVM disk drive<BR>Remove a disk from a disk group<BR>Remove a disk from SSVM control<BR>Determine available free disk space<BR>Record the command line equivalent for any VMSA operation</DIV> <DIV> </DIV> <DIV>Initialization<BR>When the SUN StoEdge Volume Manager initializes a new disk, it creates two partitions: a small partition called the private region, and a large partition called the public region that covers the remainder of the disk</DIV> <DIV> </DIV> <DIV>Encapsulation<BR>If you have existing data on the disk, you would not want to initialize the disk, as this destroys any data. Instead, you can choose to encapsulation the disk.<BR>In order for Sun StrEdge Volume Manager to encapsulation the disk, there should be at least 1024 sectors in an unused slice at the beginning or end of the disk and two free partitions.</DIV> <DIV> </DIV> <DIV>Identifying Storage Devices<BR>The best way to identify the type and model of storage devices connected to your system is to read the product model tag and study the related technical manuals. Occasionally, you might be working with systems remotely and need to identify the hardware configuration using operating system commands and other tools</DIV> <DIV> </DIV> <DIV>The luxadm command can give very useful information if you konw some basic controller addresses. It is still limited to certain storage models, and will give error messages if unsupported devices are examined. </DIV> <DIV> </DIV> <DIV>Command-line status<BR>As early as possible, learn how to use three very important command-line tools to gather SSVM status:<BR>vxprint<BR>vxdisk<BR>vxdg</DIV> <DIV> </DIV>
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	发表于:2006-09-04 ┆ 阅读(586) ┆ 评论(0)

	ES310-chapter4:VMSA Software
	<DIV>Upon completion of this module, you should be able to :<BR>Describe the VMSA server/client relationship<BR>Verify the VMSA server software is running<BR>Start the VMSA client software<BR>Use the main VMSA features<BR>Use the Option menu to customize the behavior of VMSA<BR>Describe two important uses for the Task Request Monitor</DIV> <DIV> </DIV> <DIV>The VMSA software is a new generation of disk storage administration software that allows greater flexibility for SSVM administrators.</DIV> <DIV> </DIV> <DIV>Core administrative software that runs on the SSVM system is designed to interact directly with either a Web browser or a graphical administration application. VMSA</DIV> <DIV> </DIV> <DIV>You can manually stop and start the server portion of the VMSA software on the SSVM server using the following options:<BR>vmsa_server -V:print the version<BR>vmsa_server -q:verifies the server software is running<BR>vmsa_server &:uses the normal startup<BR>vmsa_server -k:kills the VMSA server software</DIV> <DIV> </DIV> <DIV>The name of the server to be monitored can be included in the startup command as follows:<BR># /opt/VRTSvmsa/bin/vmsa server_name &</DIV> <DIV> </DIV>
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	发表于:2006-09-04 ┆ 阅读(570) ┆ 评论(0)

	ES310-chapter3:Introduction to Managing Data
	<DIV>Upon completion of this module, you should be able to:<BR>Describe problems associated with managing large numbers of disks<BR>List requirements and techniques for managing large amount of data<BR>Describe commonly implemented RAID levels<BR>Describe a performance of reliability consideration relevant to each RAID implementation<BR>List guidelines for choosing an optimized stripe width for sequential and random I/O</DIV> <DIV> </DIV> <DIV>RAID Technology Overview<BR>RAID is an acronym for redundant array of inexpensive disks. The SSVM application supports the following RAID levels:<BR>RAID 0:Striping/Concatenation<BR>RAID 1:Mirroring<BR>RAID 0+1:Striping plus Mirroring<BR>RAID 5:Striping with distributed parity</DIV> <DIV> </DIV> <DIV>Striping and Mirroring-RAID 0+1<BR>Combining striping with mirroring can privide multiple gains including:<BR>Significant performance inceases<BR>Complete data redundancy<BR>Transparent disk drive failures</DIV> <DIV> </DIV> <DIV>Mirroring and Striping-RAID 1+0<BR>Significant performance increases <BR>Complete data redundancy<BR>Transparent disk drive failures<BR>Higher disk failure tolerance than RAID 0+1</DIV> <DIV> </DIV> <DIV>RAID 5 limitations:<BR>A minimum of three disks are required to implement RAID 5 in Volume Manager<BR>RAID 5 cannot be mirrored, reduncancy is provided through the parity information<BR>Write-intensive performance can be poor<BR>If there are more than 20 percent writes, an alternative RAID option, such as RAID 0+1,should be considered<BR>There can be severe performance degradation with a failed disk in a write-intensive environment</DIV> <DIV> </DIV>
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	发表于:2006-09-04 ┆ 阅读(612) ┆ 评论(0)

	ES310-chapter2:Installation
	<DIV>Upon completion of this module, you should be able to:<BR>Describe how the SSVM utilizes disk space<BR>Install the Sun StorEdge Volume Manager 3.x software<BR>Explain the difference between the SSVM vxinstall Quick Installation and Custom Installation options<BR>Initialize the SSVM installation with vxinstall</DIV> <DIV> </DIV> <DIV>Pre-installation Planning<BR>The software installation process can be a very challenging. The process and method chosen varies with each organization's current configuration and requirements but one variable remains constant:The installation should be carefully planned in advance.</DIV> <DIV> </DIV> <DIV>One major disadvantage to placing your system disk under SSVM control is that recovery (in the event of a failed root disk) is much more complex.</DIV> <DIV> </DIV> <DIV>Backups<BR>Not only must you have backups, but you must verify them. Should there be a hardware failure or not enough space to facilitate the upgrade, you must be able to recover or back-out the software. Perform a complete backup immediately prior to the installation process.</DIV> <DIV> </DIV> <DIV>Software Installation Process<BR>In order to fully understand a Sun StoEdge Volume Manager installation, you must be familiar with the following aspects:<BR>SSVM distribution package names and functions<BR>SSVM package installation method<BR>SSVM package distribution during installation<BR>Option-support packages</DIV> <DIV> </DIV> <DIV>Software Installation:<BR>The SSVM software packages are installed using the pkgadd command as follows:<BR># pkgadd -d 'pwd'</DIV> <DIV> </DIV> <DIV>The vxinstall Option Selection<BR>The Quick Installation is not recommended, as the default action is to encapsulate all disks, including the root disk. This option includes the following features:<BR>Examines all disks connected to the system, and either encapsulates existing partitions(placing these partitions under SSVM's control, leaving them int……
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	发表于:2006-09-01 ┆ 阅读(636) ┆ 评论(0)

	ES310-chapter1:SUN Storage Introduction
	<DIV> <TABLE style="BORDER-COLLAPSE: collapse" borderColor=#dddddd cellSpacing=0 cellPadding=0 width=360 align=center border=1> <TBODY> <TR height=60> <TD align=middle width=60><IMG alt="" src="http://control.cublog.cn/fileicon/rar.gif" border=0></TD> <TD> <TABLE style="BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0> <TBODY> <TR height=20> <TD align=middle width=40>文件:</TD> <TD>graph.rar</TD></TR> <TR height=20> <TD align=middle width=40>大小:</TD> <TD>719KB</TD></TR> <TR height=20> <TD align=middle width=40>下载:</TD> <TD><A href="http://www.cublog.cn/u/6589/upfile/060901151851.rar">下载</A></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE> <TABLE style="BORDER-COLLAPSE: collapse" borderColor=#dddddd cellSpacing=0 cellPadding=0 width=360 align=center border=1> <TBODY> <TR height=60> <TD align=middle width=60><IMG alt="" src="http://control.cublog.cn/fileicon/rar.gif" border=0></TD> <TD> <TABLE style="BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0> <TBODY> <TR height=20> <TD align=middle width=40>文件:</TD> <TD>graph1.rar</TD></TR> <TR height=20> <TD align=middle width=40>大小:</TD> <TD>733KB</TD></TR> <TR height=20> <TD align=middle width=40>下载:</TD> <TD><A href="http://www.cublog.cn/u/6589/upfile/060901151930.rar">下载</A></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>Upon completion of this module, you should be able to :<BR>Describe the major disk storage administration tasks<BR>List the disk storage concepts common to many storage arrays<BR>List the general features of current Sun disk storage models<BR>Describe the basic Sun StoEdge Volume Manager disk drive replacement process<BR>Describe a typical disk replacement process variation</DIV> <DIV> </DIV> <DIV>SSVM Software Installation<BR>Installing the SSVM software is essentially the same as installing any Solaris application. It is done using the standard command-line or graphical package installation……
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	发表于:2006-09-01 ┆ 阅读(692) ┆ 评论(0)