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Disková pole DSxxxx připojená k IBM i

Disková pole DSxxxx připojená k IBM i. V áclav Matoušek, Igor Novotný v aclav _ matousek @cz.ibm.com i gor.novotny @comparex.cz Konference Common ČR & SR Velk é Losiny , 20 10 -0 5-17. AS/400 Storage History. “Internal Storage” (the only non-IBM vendor: EMC)

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Disková pole DSxxxx připojená k IBM i

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  1. Disková pole DSxxxxpřipojená k IBM i Václav Matoušek, Igor Novotný vaclav_matousek@cz.ibm.com igor.novotny@comparex.cz Konference Common ČR & SR Velké Losiny, 2010-05-17

  2. AS/400 Storage History • “Internal Storage” (the only non-IBM vendor: EMC) • SCSI direct attached external storage (EMC Symmetrix) • FC direct attached external storage (IBM Shark, EMC Symmetrix) • Limiting factors: • 520 BPS vs. 512 BPS in Open Systems • IOP required for I/O cards – virtualization only via System i LPAR

  3. IBM i Storage Actual • “Internal Storage” (IBM only) • FC direct attached storage: IBM DS8xxx, DS6xxx, DS5xxx, • EMC DMX, V-Max • (520 BPS required) • VIOS FC attached storage using NPIV – see direct attached • VIOS FC attached storage without NPIV – theoretically any external • storage supported by VIOS (= AIX) • e.g. IBM DS3xxx, DS4xxx, XIV • 512 to 520 BPS translation done by VIOS (performance issue)

  4. Definice pojmů LPAR a virtualizace LPAR = Logical Partition Jeden velký server je “rozparcelován” na několik oddělených jednotek, tz. “partitions”. Uvniř každého LPARu běží vlastní operační systém nezávislý na ostatních LPARech. Virtualizace HW Fyzický HW je virtualizační mezivrstvou prezentován jako virtuální HW. Virtuální HW může mít jiné vlastnosti a množství než fyzický HW. Tím se zajišťuje bezpečné sdílení fyzického HW LPARy. LPARy: OS1 OS2 OS3 OS4 LPAR1 LPAR2 LPAR3 LPAR4 LINUX LINUX AIX AIX Virtual HW resources Virtual layer HW resources

  5. Logical Partitioning (POWER4) LPAR 1 LPAR 2 LPAR 3 LPAR 4 Processors Memory I/O Slots • Flexibility to allocate resources depending on need

  6. Dynamically resizable Linux 2 CPUs 2 CPUs 2 CPUs 6 CPUs IBM I Linux IBM i AIX IBM i Virtual I/O Server AIX Micro-partitioning Virtual I/O server partition AIX IBM i Ethernetsharing Storage sharing Virtual I/O paths Hypervisor SAN Storage HMC Micro-partitioning Shared CPU, fraction of CPU power can be assigned to a partition. One “shared CPU pool”. Virtual Ethernet Virtual Ethernet VLAN compliant switch implements in Hypervisor. (firmware) Virtual I/O Server “Appliance” partition to provide Virtual Disk Storage and Ethernet Adapter Sharing for the POWER5 Advanced Virtualization environment. Not a general use partition – dedicated to I/O. Shared Ethernet (Bridge) Provides bridge between virtual and physical world. Virtual SCSI Provides virtual access to physical storage (SCSI, FC, iSCSI). Virtualization (POWER5) Jay Kruemcke IBM 2003

  7. SAN - RAID Virtual I/O Server (VIOS) & Disk Virtualization • Virtualization of SCSI disk drives • Both internal and external disk drives and LUNs can be virtualized • Both full disks and Logical Volumes can be served as virtual hdisks • Virtualized devices appear and are treated as hdisks at the client • I/O managed by IBM Hypervisor POWER5/6 server VIOS* #1 AIX LVM Shared disk pool LPAR1 AIX LPAR2 IBM i lv1 hdisk0 ASP lv0 Virtual & physical SCSI vscsi1 vscsi0 vhost0 vhost1 POWERHypervisor

  8. Virtual I/O Server (VIOS) & Ethernet bridging VIOS Enables Bridging of Physical I/O Devices to Virtual I/O Devices Virtual I/O Server (VIOS) LPAR is required • No physical adapters required in non VIOS LPARs • Physical adapters in VIOS LPAR shared with non VIOS LPARs • Requires the Advanced POWER Virtualization Feature • I/O managed by IBM Hypervisor Hypervisor emulates 802.1Q-compliant virtual Ethernet switch POWER5/6 server VIOS* #1 LPAR1 AIX LPAR2 IBM i SEA Internal Device POWERHypervisor Logical adapter Logical adapter Logical adapter Logical adapter 802.1Q (VLAN) Ethernet switch Physical Adapter Logical adapter POWERHypervisor External Device

  9. Virtual SCSI connection Virtual SCSI connection Virtual LAN connection DVD DVD DVD Virtual LAN connection Návrh prostředí VIOS Host 2 i5/OS Client VIOS Host 1 hdiskX LUNs hdiskX LUNs DDxx /dev/cd0 /dev/cd0 OPTxx IVE CMNxx IVE SEA SEA DS4700

  10. Propojení FC a zónování VIOS Host 1 VIOS Host 2 FC port 1 FC port 2 FC port 1 FC port 2 Zóny Controller A Controller B DS4700

  11. Konfigurace disků na DS4700

  12. Konfigurace DS4700 – mapování hostů

  13. Konfigurace partitions – i5

  14. Konfigurace partitions – VIOS Host 1

  15. Konfigurace partitions – VIOS Host 2

  16. Konfigurace disků ve VIOSech • Zrušení SCSI rezervací na obou VIOSech (user root): # chdev -l hdiskx -a reserve_policy=no_reserve • Přidání disku pro i5 partition na obou VIOSech (user padmin): $ mkvdev -vdev hdiskx -vadapter vhosty -dev vhdiskx hdiskx = jméno disku ve VIOSu vhosty = jméno virtuálního SCSI adaptéru pro i5 partition (viz HMC) vhdiskx = pouze symbolické jméno

  17. Interpretace disků ve VIOSu • $ lsmap -vadapter vhost3 • SVSA Physloc Client Partition ID • --------------- -------------------------------------------- ------------------ • vhost3 U9117.MMA.10F257B-V2-C20 0x00000008 • VTD vhdisk8 • Status Available • LUN 0x8100000000000000 • Backing device hdisk8 • Physloc U789D.001.DQD270V-P1-C3-T1-W200500A0B826EDFB-L0 • VTD vhdisk9 • Status Available • LUN 0x8200000000000000 • Backing device hdisk9 • Physloc U789D.001.DQD270V-P1-C3-T1-W200500A0B826EDFB-L1000000000000 • VTD vhdisk10 • Status Available • LUN 0x8300000000000000 • Backing device hdisk10 • Physloc U789D.001.DQD270V-P1-C3-T1-W200500A0B826EDFB-L2000000000000

  18. Instalace iOS z virtuální DVD mechaniky $ mkrep -sp rootvg -size 10G $ mkvopt -name iosopt1 -file iOS7_1.iso –ro $ lsrep $ mkvdev -fbo -vadapter vhost3 -dev lpar_dvd $ loadopt -vtd lpar_dvd -disk iosopt1

  19. Interpretace disků v i5 (WRKDSKSTS)

  20. Interpretace disků v i5 (STRSST)

  21. Management overhead (tapes, drives, processes) Tape media waste (partially-filled cartridges) Backup failures (human or drive issues) Restore performance (retrieval and load time) Technologie zálohování bez VTL Direct Tape Backup Disk-to-Disk-to-Tape Challenges Power System BRMS SCSI or FC Autoloader / Library Tape Drive(s) Challenges Power System • Management overhead (tapes, drives, processes) • Resource intensive (expensive internal DASD) • System overhead (moving to disk then to tape) • Restore performance (archive on DASD is expensive) • No full system backup (no IPL) • Backup to DASD • Copy off to Tape DASD BRMS SCSI or FC Autoloader/Library Tape Drive(s) 24

  22. Technologie Virtual Tape Library Virtual Tape Solution Power System Virtual Media Pools Alternate IPL SCSI or FC Virtual Tape Drive(s) VTL Server & disks Alternate IPL Virtual Tape Library Virtual Tape Drive(s) Physical Tape Library • Faster backup and restore • Leverages disk for write/read • Offers multiple virtual drives per LPAR • Emulates LTOx tape formats (min. 120 Mbytes/sec) • More cost effective • Doesn’t require expensive DASD • Scales as business changes • Efficient management of tape • Doesn’t require or impact Power System cycles • Includes multi-mode automated options for transfer to physical tape • Improves uptime • Designates as Alternate IPL • Performs entire system backup/restore

  23. Virtual Tape Solution Technologie Virtual Tape Library Power System • Backup to “Tape” • Plug-n-play to existing process • Utilize existing BRMS application • Target standard LTO drives SCSI or FC LTO3 LTO4 LTO1 VTL Server & disks • Data store with on-line disk • Onboard disk • Existing volumes in SAN • Optional Crossroads disk expansion • Transfer to Tape Virtual Media Pools • Stacked virtual tapes to physical tape • Native tape creation to read in standard tape drives Physical Tape Library • Compatible backup processes • Emulates standard IBM tape drive formats • Supports i5/OS save/restore option commands • Supports BRMS backup application • Expands capacity as needed • Can leverage existing disk in SAN • Has optional diskexpansions • Optimizes tape operations • Stacked tape export: multiple virtual cartridges written to each physical tape • Native tape export: exact data set/format copied to physical tape • Pools of virtual cartridges can be exported to physical media • Uses standard open system tape

  24. Improves recovery time Remote recovery can begin immediately Deploys jointly or independently in the data center, campus or remote site Optimizes bandwidth Replication calculates and transmits only the changes in to remote site(s) Virtual tapes are synchronized to be exact copies of original Secures transfer of data, eliminates risk Transport packets are encrypted to ensure secure transfer to remote site Vzdálená replikace VTL Virtual tape replication Data Center • Primary Site • User selected virtual tapes (or pools of tape) • Target site selection • (multi-site replication) … Virtual Media Pools Virtual Media Pools SSL … • Replication Site • Delta changes to files transmitted • Secure tunnel transfer • Media pools at remote site(s) contain tapes of local and remote virtual tapes • Physical tapes can be created at remote site Remote Site

  25. Questions? • Vaclav_Matousek@cz.ibm.com • Igor.Novotny@comparex.cz

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