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IBM Sistemlerinizdeki Bilgi Patlamasını Yönetmenin Kolay Yolu

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  • 1. Sistemlerinizdeki Bilgi Patlamasını YönetmeninKolay Yolu: IBM SAN Volume ControllerAlpay ÖzerVeri Depolama Sistemleri Platform Lideri, IBM Türk
  • 2. SAN Volume Controller Agenda Introduction SAN Volume Controller Architecture Storage Management FunctionsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 3. Block Virtualization SNIA Shared Storage Model  As big, small or as many as users need  As fast as users need Logical Volumes  Can be very reliable or not  Can grow, shrink, or morph Block Aggregation  Fixed Size  Bounded Performance  break (occassionally) Physical DisksIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 4. Block Virtualization SNIA Shared Storage ModelIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 5. Block Virtualization Value Proposition Manage the storage pool from a Combine the capacity from central point multiple arrays into a single pool of storage Virtual Virtual Virtual Virtual Disk Disk Disk Disk Apply common function set across the storage pool Make non-disruptive Storage Virtualization Layer changes to the physical storage infrastructure DS8000 HP HDS EMC DS4000IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 6. SVC Delivers Availability, Performance, and Scalability It’s resilient It has the fastest benchmark It scales to manage and highly available of any controller large environments We designed and built SVC with  SVC has the fastest SPC-1  SVC scales from very the resiliency of a storage controller benchmark EVER submitted small configurations SVC supports non-disruptive firmware (380K IOPS) (1TB) to large enterprises updates and hardware maintenance on (> 500TBs) and growing ! the disk arrays to further increase its  SVC has the fastest SPC-2 availability benchmark EVER submitted  New SVC engines deliver (7.080 GBPS) dramatically better SVC is a proven offering, having been throughput, supporting delivering benefits to customers for six  Many references quote larger and more I/O years significant performance intensive environments improvements (up to 10X faster) 6IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 7. SAN Volume Controller Delivers Value Scales to meet Optimizes Improves Improves Simplify business needs resources business storage capacity infrastructure continuity utilization Proactively support  Creates tiers of  Supports data  Combines storage  Manage a single information growth storage movement without capacity into a single storage resource interrupting resource – from from a central As client data and  Enables multi- applications point multiple vendors applications grow, vendor strategies the storage  Allocate more  Manage storage as a  Migrate data infrastructure can storage to business resource, not without disruption grow with them. applications as separate boxes automatically  Automatic process of storage capacity provisioningIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 8. IBM SAN Volume Controller 6.1  Industry-leading storage virtualization offering  Best performing storage virtualization system in industry-standard benchmarks  First storage virtualization system with fully integrated SSD support  Integrated iSCSI server attachment support  Fully upgradable without disruption from smallest to largest configurations  “Future proof” with ability to replace current hardware with new hardware without disruption  Network-based virtualization with SVC supports diverse server environments including VMware, other virtualization, and non virtualized servers  To date, IBM has shipped almost 22,500 SVC engines running in more than 7,200 SVC systems  In 2008 & 2009 across this entire installed base, SVC has delivered better than five nines (99.999%) availability  SAN Volume Controller is a proven offering that has been delivering benefits to customers for over six years  SAN Volume Controller can virtualize IBM and non-IBM storage (over 120 systems from IBM, EMC, HP, HDS, Sun, Dell, NetApp, Fujitsu, NEC, Xiotech)IBM System Storage SAN IBM Confidental 8 Volume Controller © 2011 IBM Corporation
  • 9. SAN Volume Controller Version 6 IBM N series Supported Environments Gateway NetApp Microsoft IBM AIX HP-UX 11i Linux V-Series IBM Novell Windows Sun Tru64 (Intel/Power/zLinux) IBM TS7650G IBM 1024 RHEL z/VSE NetWare VMware Hyper-V IBM i 6.1 Solaris OpenVMS SGI IRIX Apple BladeCenter Hosts vSphere 4 SUSE 11 Mac OS New New New New Point-in-time Copy Native iSCSI 8Gbps SAN fabric SAN Full volume, Copy on write Continuous Copy 256 targets, NewIncremental, Cascaded, Reverse Metro/Global MirrorNewSpace-Efficient, FlashCopy Mgr Multiple Cluster Mirror New Entry Edition SAN Space-Efficient Virtual Disks SAN Entry Edition software Software SSD Volume Controller Volume Controller New New New New New Virtual Disk Mirroring IBM IBM IBM IBM Hitachi HP EMC Sun NetApp NEC Fujitsu Pillar Lightning MA, EMA CLARiiON ESS, DS XIV N series Thunder MSA 2000, XP StorageTek FAS iStorage Bull Eternus Axiom DS3400 DCS9550 EVA 6400, 8400 CX4-960 StoreWay 3000FAStT TagmaStore DS4000 DCS9900 AMS 200, 500,1000, 2100, 2300, 2500 Symmetrix 8000 Models 2000 & 1200 DS5020, DS3950 WMS, USP 4000 models 600 & 400 DS6000 DS8000 For the most current, and more detailed, information please visit ibm.com/storage/svc and click on “Interoperability”. IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 10. SAN Volume Controller Agenda Introduction SAN Volume Controller Architecture Storage Management FunctionsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 11. IBM SAN Volume Controller Architecture and Terminology consistent consistent consistent Driver Stack Driver Stack Driver Stack vDISK here: striped Mode IO Group SVC Node with UPS (not depicted) Managed Disk TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SAN Volume Controller cluster Storage Pool Storage Pool Storage PoolIBM System Storage SAN Volume Controller Array LUNs © 2011 IBM Corporation
  • 12. Virtual-Disk Types Image Mode: Pass thru; Virtual Disk = Physical LUN A Sequential Mode: B Virtual Disk mapped sequentially to a portion of a managed disk C Virtual Disks Striped Mode: Virtual Disk striped across multiple managed disks. Preferred mode MDG1 MDG3 A C B MDG2 CIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 13. SAN Volume Controller – Topology TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SVC ClusterIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 14. iSCSI Server Attachment  Each SVC Storage Engines have two 1Gbps Ethernet ports – Until now, 1 port per cluster used for management interface another for service  SVC 5 enables use of these ports for iSCSI server connections  Storage attachment, intra-cluster communication and remote replication still use Fibre Channel  1 port per cluster still used for management interface but not dedicated to this function  Helps reduce cost of server attachment Host servers Fibre-attached hosts – May be especially helpful for BladeCenter configurations with iSCSI HBAs ● Eliminates need for HBA in blades – Helps reduce number of FC switch ports required  All SVC function available to iSCSI-attached servers LAN SAN Zones  Virtual disks may be shared between SAN Volume iSCSI and FC servers Controller SAN Storage Zones Fibre-attached storage 14IBM System Storage SAN Volume Controller © 2011 IBM Corporation 14
  • 15. SVC 2145 Storage Engines SVC 2145-CF8 Storage Engine  Based on IBM System x3550M2 server ► Intel® Xeon® 5500 2.4GHz quad-core processor ► Triple cache size to 24GB (with future growth possibilities) ► Four 8Gbps FC ports (support Short-Wave & Long-Wave SFPs)  Up to 4 Solid State Drives  New engines may be intermixed in pairs with other engines in SVC clusters ► Mixing engine types in a cluster results in VDisk throughput characteristics of the engine type in that I/O group  Supported only by SVC software Version 5  2145-8G4 was withdrawn December 11, 2009  SVC 2145-8A4 Storage Engine (for entry edition)  Based on IBM System x3250 server ► Intel® Xeon® E3110 3.0GHz dual-Core processor ► 8GB of cache (same as model 8G4) ► Four 4Gbps FC ports (same as model 8G4)  Throughput approximately twice that of Model 4F2 and about 60% the throughput of Model 8G4  At about 60% the price of the Model 8G4IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 16. Continuous Product Evolution  Constant development first Release  Backward compatibility (64 bit not for 32 bit Hardware)  Non-disprutive Upgrade sincet eight years SAN Volume Controller R6.1 (CF8)  History  SVC 4F2 - 4GB cache, 2Gb SAN, 2006 SVC 8F2 - 8GB cache, 2Gb SAN (ROHS comp.) Release SVC 8F4 - 8GB cache, 4Gb SAN 155.000 SPC-1 IOPS SVC 8G4 - Dual-core Prozessor, 2008 278.000 SPC-1 IOPS SVC CF8 - 24GB, Quad-core, 64bit 315.043 " 4-node 380.483 " 6-nodeIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 17. Stable Scalability  Leading availability record: 99,999 ~ 99,9999%  Maximum SVC-induced latency 60µs = “invisible" 60µs  SVC behaves completely deterministic even under maximimum load due to the absence of Interrupts Technology = State-Loop with Adapter Polling 60µsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 18. SVC: Innovative Scale-Out SSD Implementation Add SSDs to scale capacity Add SVC I/O Groups to scale throughput and add capacity  Add SSDs to SVC engines for more capacity – SSDs may be added without disruption to engines  Add SVC engines for more capacity and throughput – Additional engines provide more processing power, more bandwidth, more SAN attachments – SVC designed to deliver maximum I/O capability of SSDs – Up to 50,000 read IOPS per SSD – Up to 200,000 read IOPS per SVC I/O Group – Up to 800,000 read IOPS per SVC clusterIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 19. Scale-Out SSD Support  Up to four 146GB SSDs per SVC engine – Control costs: buy only as many SSDs as required ● Minimum purchase: one SSD  Virtual disk mirroring used to protect SSD data – Designed to protect against SSD or storage engine failure – Up to 584GB mirrored capacity (1.2TB total) per I/O Group – Up to 2.4TB mirrored capacity (4.8TB total) per SVC cluster  SSD fully integrated into SVC system – Replication, data movement, management operate as for other storage – Move data to/from SSD without disruption; make copies of SSD data onto HDD – SSDs in one I/O Group (pair of Storage Engines) may be accessed through any I/O Group in SVC clusterIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 20. Innovative SVC SSD Protection Options  Mirroring between SSDs  Mirroring between SSDs and in SVC Storage Engines magnetic disk – Suitable for use with any workload – Unique SVC protection option – Recommended general-use – Maximizes available SSD capacity protection option – Suitable for workloads with primarily read I/Os  Unmirrored SSDs also an option ● Write I/Os are cached but write – No protection against SSD or storage engine throughput ultimately limited by HDD failure ability – Maximizes available SSD capacity – Should be used only with well- understood workloads – Not recommended – Should be used only for easily recreatable dataIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 21. SAN Volume Controller Management Options SVC GUI SVC CLI Tivoli Productivity Center  Completely redesigned  ssh  TPC, TPC-R  Browser based  scripting  SMI-S 1.3  Extremely easy to learn/use  complete command set  Embedded CIMOM  fast TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SAN Volume Controller cluster VDS VSSIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 22. Role based security concept  Monitor access to all viewing actions  GUI cannot perform any actions that change the state of the cluster or the resources that the cluster manages. The user can access all the information- related panels and commands, back up configuration data, change his or her password.  Copy Operator can manage all existing FlashCopy, Metro Mirror, and Global Mirror relationships. In addition, the user can access all the functions available to the Monitor role.  Service can view the View Clusters panel, launch the management GUI, and view the progress of actions on clusters with the View Progress panel, begin disk discovery process, and discover and include disks. A user with this role can also access all the functions available to the Monitor role.  Administrator can access all functions on the management GUI and issue any command-line interface (CLI) command, except those that deal with managing users, user groups, and authentication.  Security Administrator (SecurityAdmin role name) can access all functions on the management GUI and issue any CLI command. Users with this role can also manage users, user groups, and manage user authentication.IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 23. SAN Volume Controller Agenda Introduction SAN Volume Controller Architecture Storage Management FunctionsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 24. SAN Volume Controller – Storage Management Functions SVC base license:  Thin Provisioning (SEV – Space Efficient vDISKS)  Easy Tiering  vDISK Mirroring  Non disruptive Data Migration  Insert and Remove SAN Volume Controller  QoS mit IO Governing Separate License Features:  Flashcopy (Point in Time Copy Engine)  Remote ReplicationIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 25. Thin Provisioning – Space Efficient vDisks  Space-Efficient Virtual Disks function is the SVC implementation of “thin provisioning”  Traditional (“fully allocated”) virtual disks use physical disk capacity for the entire capacity of a virtual disk even if it is not used – Just like traditional disk systems  With SEV, SVC allocates and uses physical disk capacity when data is written – Can significantly reduce amount of physical disk capacity needed  Available at no additional charge with SVC base virtualization license  Extremely efficient implementation – Allocation grain size down to 32 KB  SEV will help save much of the “allocated but unused” space on virtual disks today – Can be 50% or more of disk space, especially in Windows environments – Storage administrators can focus on more strategic issues  Monitor total SVC capacity utilization, track trends, plan acquisitions – No longer need to monitor and provision for individual disksIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 26. Easy Tier SVC V6.1  Automatic storage hierarchy Host Host Host – Hybrid storage pool with 2 tiers • Solid-State Disks (SSD) & hard disks Host Volumes & Extents  I/O Monitor keeps access history for each virtualisation extent – 16MB - 2GB per extent – Every 5 minutes  Data Placement Adviser analyses Hybrid storage pool history every 24 hours  Data Migration Planner invokes data migration – Promote hot extents – Demote inactive extents SSD HDD Automatic extent migrationIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 27. SVC Easy Tier (cont.) Applications may produce Hotspots on vDISKs limit total system performance Easy Tier (continuous, self optimizing Process) Recognize Hotspots on vDISKs TotalStorage Storage Engine 336 Replace Hotspots with SSD TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 Throughput of vDISK gets SVC Cluster dramatically improved  improved performance  use of cheaper hard drives  less spindels  optimal use of SSD capacities SVC SSD Speicher *IBM System Storage SAN Volume Controller *In Version 6.1 nur mit externem SSD Speicher möglich © 2011 IBM Corporation
  • 28. Easy Tier Components Exchange Domino A “hot spot” is formed when an application DB2 makes frequent use of the same area of a SVC Node vdisk. Here, those extents are stored on magnetic disk vdisk IO Monitor generates usage statistics and sends them to the Data Placement Advisor Easy Tier Management Code Data Placement Advisor identifies hot spots, and outputs potential data migrations to the Data Migration Planner IOM DPA DMP DM Data Migration Planner decides which migrations to do based on the available storage and its characteristics Data Migratory uses SVC data migration capabilities to seamlessly migrate the data to higher performing storage without any application interruptionMagnetic Disk SSD IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 29. Easy Tier Process – published Benchmark  First ever Storage Performance Council (SPC-1) benchmark submission with SATA and SSD technology Increase of – System configuration: 2.3 TB SSD + 96 TB SATA 330%! Easy Tier Logical volume 60000 50000 Throughput (IO/s) 40000 30000 330% IOPS 20000 Improvement SSD 10000 HDD SATA 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 TimeIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 30. VDISK Mirroring  SVC stores two copies of a virtual disk, usually on separate disk systems High Availability … – SVC maintains both copies in sync and writes to both copies  If disk supporting one copy fails, SVC provides continuous data access by using other copy – Copies are automatically resynchronized after repair  Intended to protect critical data against failure of a disk system or disk array – A local high availability function, not a disaster recovery function Virtual Disk  Copies can be split TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 – Either copy can continue as production copy TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SVC Cluster SAN  Either or both copies may be space-efficient Volume ControllerIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 31. VDISK Mirroring …and also Disaster Recovery Server Cluster Virtual Disk TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SVC Cluster SAN Volume ControllerIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 32. SAN Volume Controller – stretched Cluster – Topology TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SVC Stretched Cluster 3rd Quorum Third site or separate power domainIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 33. Non disruptive Data Migration Traditional SAN SAN Volume Controller 1. Stop applications 1. Select Virtual Disk to migrate 2. Move data 2. Select Migration Target 3. Re-establish host connections 3. Initiate Migration 4. Restart applications 4. Done SAN SAN VOLUME CONTROLLERIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 34. Integration of SVC into existing environments 1 Storage subsystem LUNs assigned to server 2 Stop application Assign storage subsystem LUN to SVC and create a VDISK on it (Image Mode VDISK) 3 3 Assign SVC Image Mode VDISK to server. Server accesses original data through SVC 1 2 Fast SVC integration No need for time consuming data migration All subsequent data migrations are completely non disruptiveIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 35. Quality of Service – IO GoverningIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 36. SVC FlashCopy® Function  Volume-level local replication function Up to 256 targets  Designed to create copies for backup, parallel processing, test, … FlashCopy  Copy available almost immediately for use relationships  Background copy operation or “copy on write”  Up to 256 copies of a single source volume Source vdisk  Source and target volumes may be on any SVC supported disk systemsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 37. Incremental FlashCopy  FlashCopy capability where only changes from either source Start incremental FlashCopy or target data since last FlashCopy operation are re-copied during a target refresh  Up to 256 incremental and non-incremental targets can exist Data copied as normal for same source  Consistency groups can include both incremental and non- Later … incremental FlashCopy targets  Helps increase efficiency of FlashCopy operations and can reduce time to refresh copies Some data changed by apps  Designed to allow completion of point-in-time online backups Start incremental FlashCopy much more quickly, thus the impact of using FlashCopy is reduced – May enable more frequent backups so enabling faster recovery Only changed data copied – More frequent backups could be used as a form of “near-CDP” by background copyIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 38. Cascaded FlashCopy  FlashCopy capability to create “copies of copies” – Mappings can be incremental or non-incremental  Allows a vdisk to be both source and target in concurrent FlashCopy mappings – See diagram: Map 2 can be defined and triggered while Map 1 relationship exists  Maximum number of targets dependent on a single source disk is 256. The example shows 4 targets from source disk 0 Map 1 Map 2 Disk2  Enables backup of target disks to be made FlashCopy without having to disrupt existing FlashCopy target of Disk1 relationships with original source Disk0 Disk1 Source FlashCopy Map 4 Disk4  Helps reduce time to establish copies of targets, target of Disk0 FlashCopy since there is no need to await copy complete of target of Disk3 target disk before triggering cascaded copy Disk3 FlashCopy  Designed to increase flexibility in use of FlashCopy target of Disk1IBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 39. Reverse FlashCopy  FlashCopy capability to reverse relationships and enable rapid Create disk backup copies data recovery  Create disk backup copies of production data source target (up to 256)  If backup required because of damage to production data – Unique capability to create copy of damaged data for diagnosis target – Reverse FlashCopy relationship and copy backup to recover production Later … data Backup to tape can continue ● No need to wait for physical data movement to complete unaffected – Backup or other tasks using disk backup copies not affected 1. Preserve target source  Designed to speed recovery from damaged data damaged data OR target 2. Reverse source FlashCopy operationIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 40. Reverse FlashCopy (contd.) t0 12:00 13:00 SAN Volume SAN Volume Controller Controller 14:00 15:00 Virus : ×256 Instant recovery. All other flashcopies stay intact SAN Volume SAN Volume Controller ControllerIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 41. Space-Efficient FlashCopy (SEFC)  Combination of using SEV and FlashCopy together  Helps dramatically reduce disk space when making copies  Two variations – Space-efficient source and target with background copy Copies only allocated space – Space-efficient target with no background copy Space used only for changes between source and target Generally what people mean when they talk of “snapshots”  Space-efficient copies may be updated just like normal FlashCopy copies  SEFC may be used with multi-target, cascaded, and incremental FlashCopy – Can intermix space-efficient and fully-allocated virtual disks as desiredIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 42. Tivoli Storage FlashCopy Manager  IBM Tivoli Storage FlashCopy Manager provides replication integration between major server software and IBM disk systems and virtualized storage environments  Comparable with NetApp SnapManager and SMBR – Operates with any storage supported by SVC FlashCopy Create instant application copies for backup or application testing Many replication options including incremental (only changed blocks) or space-efficient copies (“snapshots”) DS8000 XIV DS3/4/5 SVC FlashCopy features differ between devices FlashCopy Manager* Integrated, instant copy for critical applications Virtually eliminate backup windows Rapidly create clones for application testing View inventory of application copies and instantly restore * Planned availability 4Q09IBM System Storage SAN IBM System Storage 42 Volume Controller SAN Volume Controller © 2011 IBM Corporation
  • 43. FCM – Integrated as MMC InterfaceDashboard  Task Completion  Type of Data Protection Activity  Historical Managed Capacity  Amount of Data Protection ActivityIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 44. Scheduled Backups Schedule List Scheduling Wizard Activity for schedule selected above Output for activity selected aboveIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 45. SVC Metro Mirror Function  “Metropolitan” distance synchronous remote mirroring function  Up to 300km between sites for business continuity – As with any synchronous remote replication, performance requirements may limit usable distance  Host I/O completed only when data stored at both locations  Designed to maintain fully synchronized copies at both sites – Once initial copy has completed  Metro and Global Mirror delivered as single feature – Offers great implementation flexibility  Operates between SVC clusters at each site – Local and remote volumes may be on any SVC supported disk systemsSVC Global Mirror Function  Long distance asynchronous remote mirroring function  Up to 8000km distance between sites for business continuity  Does not wait for secondary I/O before completing host I/O – Helps reduce performance impact to applications  Designed to maintain consistent secondary copy at all times – Once initial copy has completed  Built on Metro Mirror code base  Metro and Global Mirror delivered as single feature – Offers great implementation flexibility  Operates between SVC clusters at each site – Local and remote volumes may be on any SVC supported disk systemsIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 46. Remote Replication – SVC Multiple Cluster Mirror  Enables Metro and Global Mirror relationships between up to four SVC clusters – Any virtual disk is in only one MM/GM relationship MM or GM Consolidated MM or GM  One possible scenario: consolidated DR site Relationship DR Site Relationship – Up to three locations supported by one DR site – Other scenarios possible  Max MM/GM relationships increased to 8192 MM or GM Relationship  Designed to support more flexible DR strategies  Helps reduce cost of DRIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 47. SVC 3 Site Solution Windows / VMWare Servers no LVM 3rd SITE REMOTE SVC Metro/Global Mirror Virtual Disk Virtual Disk TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 TotalStorage Storage Engine 336 SAN Volume Controller SVC Cluster Quorum DS8000 – User Data DS8000 – User Data DS8000 – User DataIBM System Storage SAN Volume Controller © 2011 IBM Corporation
  • 48. Thank You!Alpay ÖzerVeri Depolama Sistemleri Platform LideriIBM Türkalpay@tr.ibm.com