Disková pole DSxxxx připojená 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 Thema-1 -D / 00. 02 / Name / Dateiname. PPT
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 2 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
IBM i Storage Actual • “Internal Storage” (IBM only) • FC direct attached storage: IBM DS 8 xxx, DS 6 xxx, DS 5 xxx, 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 DS 3 xxx, DS 4 xxx, XIV 512 to 520 BPS translation done by VIOS (performance issue) 3 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Definice pojmů LPAR a virtualizace LPAR = Logical Partition Virtualizace HW Jeden velký server je “rozparcelován” na několik oddělených jednotek, tz. “partitions”. Uvniř každého LPARu běží vlastní operační systém nezávislý na ostatních LPARech. 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: LPAR 1 AIX LPAR 2 LINUX OS 1 LPAR 3 LINUX LPAR 4 AIX OS 2 OS 3 OS 4 Virtual HW resources Virtual layer HW resources 4 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Logical Partitioning (POWER 4) LPAR 1 LPAR 2 LPAR 3 LPAR 4 Processors Memory I/O Slots Flexibility to allocate resources depending on need 5 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Micro-partitioning Virtualization (POWER 5) Shared CPU, fraction of CPU power can be assigned to a partition. One “shared CPU pool”. Virtual Ethernet Dynamically resizable 2 2 2 CPUs Storage sharing Virtual I/O paths AIX Virtual I/O Server IBM i AIX IBM i Linux Ethernet sharing “Appliance” partition to provide Virtual Disk Storage and Ethernet Adapter Sharing for the POWER 5 Advanced Virtualization environment. Not a general use partition – dedicated to I/O. Shared Ethernet (Bridge) Hypervisor SAN Storage Virtual I/O Server Micro-partitioning IBM I Virtual I/O server partition Virtual Ethernet VLAN compliant switch implements in Hypervisor. (firmware) 6 CPUs HMC Provides bridge between virtual and physical world. Virtual SCSI Provides virtual access to physical storage (SCSI, FC, i. SCSI). 6 Jay Kruemcke IBM 2003 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Virtual I/O Server (VIOS) & Disk 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 POWER 5/6 server VIOS* #1 SAN - RAID Shared disk pool AIX LVM LPAR 1 AIX LPAR 2 IBM i lv 1 lv 0 Virtual & physical SCSI vhost 0 vhost 1 hdisk 0 vscsi 0 ASP vscsi 1 POWER Hypervisor 7 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
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 emulates 802. 1 Q-compliant virtual Ethernet switch POWER 5/6 server VIOS* #1 SEA Internal Device Physical Adapter Logical adapter LPAR 1 AIX Logical adapter LPAR 2 IBM i Logical adapter 802. 1 Q (VLAN) Ethernet switch Logical adapter POWER Hypervisor External Device POWER Hypervisor 8 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
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Návrh prostředí VIOS Host 1 VIOS Host 2 i 5/OS Client hdisk. X LUNs DDxx Virtual SCSI connection /dev/cd 0 OPTxx DVD IVE SEA DVD Virtual LAN connection IVE CMNxx Virtual LAN connection SEA DS 4700 11 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Propojení FC a zónování VIOS Host 1 FC port 1 VIOS Host 2 FC port 1 FC port 2 Zóny Controller A Controller B DS 4700 12 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace disků na DS 4700 13 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace DS 4700 – mapování hostů 14 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace partitions – i 5 15 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace partitions – VIOS Host 1 16 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace partitions – VIOS Host 2 17 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Konfigurace disků ve VIOSech Zrušení SCSI rezervací na obou VIOSech (user root): # chdev -l hdiskx -a reserve_policy=no_reserve Přidání disku pro i 5 partition na obou VIOSech (user padmin): $ mkvdev -vdev hdiskx -vadapter vhosty -dev vhdiskx = jméno disku ve VIOSu vhosty = jméno virtuálního SCSI adaptéru pro i 5 partition (viz HMC) vhdiskx = pouze symbolické jméno 18 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Interpretace disků ve VIOSu $ lsmap -vadapter vhost 3 SVSA Physloc Client Partition ID ------------------------------vhost 3 U 9117. MMA. 10 F 257 B-V 2 -C 20 0 x 00000008 VTD vhdisk 8 Status Available LUN 0 x 810000000 Backing device hdisk 8 Physloc U 789 D. 001. DQD 270 V-P 1 -C 3 -T 1 -W 200500 A 0 B 826 EDFB-L 0 VTD vhdisk 9 Status Available LUN 0 x 820000000 Backing device hdisk 9 Physloc U 789 D. 001. DQD 270 V-P 1 -C 3 -T 1 -W 200500 A 0 B 826 EDFB-L 1000000 VTD vhdisk 10 Status Available LUN 0 x 830000000 Backing device hdisk 10 Physloc U 789 D. 001. DQD 270 V-P 1 -C 3 -T 1 -W 200500 A 0 B 826 EDFB-L 2000000 19 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Instalace i. OS z virtuální DVD mechaniky $ mkrep -sp rootvg -size 10 G $ mkvopt -name iosopt 1 -file i. OS 7_1. iso –ro $ lsrep $ mkvdev -fbo -vadapter vhost 3 -dev lpar_dvd $ loadopt -vtd lpar_dvd -disk iosopt 1 20 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Interpretace disků v i 5 (WRKDSKSTS) 21 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Interpretace disků v i 5 (STRSST) 22 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
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Technologie zálohování bez VTL Direct Tape Backup Power System Challenges Management overhead (tapes, drives, processes) Tape media waste (partially-filled cartridges) Backup failures (human or drive issues) Restore performance SCSI or FC (retrieval and load time) Autoloader / Library Tape Drive(s) Disk-to-Tape Challenges Power System DASD Management overhead ❶ Backup to DASD ❷ Copy off to Tape (tapes, drives, processes) Resource intensive (expensive internal DASD) System overhead (moving to disk then to tape) SCSI or FC Restore performance (archive on DASD is expensive) Autoloader/Library Tape Drive(s) 24 No full system backup (no IPL) DSxxxx & IBM i / 2. 1 / IRN & Va. Ma 24
Technologie Virtual Tape Library l Faster backup and restore l l More cost effective l l l Virtual Tape Solution Power System Virtual Media Pools l Doesn’t require or impact Power System cycles Includes multi-mode automated options for transfer to physical tape Improves uptime l l Alternate IPL Doesn’t require expensive DASD Scales as business changes Efficient management of tape l l Leverages disk for write/read Offers multiple virtual drives per LPAR Emulates LTOx tape formats (min. 120 Mbytes/sec) Designates as Alternate IPL Performs entire system backup/restore Virtual Tape Drive(s) SCSI or FC VTL Server & disks Alternate IPL Virtual Tape Library Virtual Tape Drive(s) Physical Tape Library 25 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Technologie Virtual Tape Library l Compatible backup processes l l Emulates standard IBM tape drive formats Supports i 5/OS save/restore option commands Supports BRMS backup application Expands capacity as needed l Power System ❶ Backup to “Tape” • Plug-n-play to existing process • Utilize existing BRMS application • Target standard LTO drives Can leverage existing disk in SAN l Virtual Tape Solution Has optional disk expansions SCSI or FC l Optimizes tape operations l Stacked tape export: multiple virtual cartridges written to each physical tape l Native tape export: exact data set/format copied to physical tape l Pools of virtual cartridges can be exported to physical media Uses standard open system tape l ❷ Data store with on-line disk • Onboard disk • Existing volumes in SAN • Optional Crossroads disk expansion ❸ Transfer to Tape • Stacked virtual tapes to VTL Server & disks Virtual Media Pools physical tape • Native tape creation to read in standard tape drives Physical Tape Library 26 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Vzdálená replikace VTL − 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 Virtual tape replication Data Center ❶ Primary Site • User selected virtual tapes (or pools of tape) • Target site selection (multi-site replication) … S S L Improves recovery time Virtual Media Pools … ❷ Replication Site Virtual Media Pools • 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 27 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
Questions? Vaclav_Matousek@cz. ibm. com Igor. Novotny@comparex. cz 28 DSxxxx & IBM i / 2. 1 / IRN & Va. Ma
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