Microsoft Multipath I/O


??????? ??????? ?? ????????????? Microsoft MPIO, ??????????? ? ?? Windows Server 2008/R2, ? ??????? ?????????? ????? ???????? (? ???????? ?? ??????? ????????? ???????????). ??????? ? ??????? ???????? ? ??????? ?????? Microsoft Multipath I/O ? ????????? ??? ????????? ? Server Core.

??? ????? MPIO ? ??? ?????? ? ??????? ???????, ?????? ????????? ? ??????.

Multipath I/O ? Windows Server 2008 R2 ???????? ? ???? ??????????? Device-Specific Module (DSM), ??????? ????? ???????? ? ????????? ?????????, ??????????????? ?????????? Asymmetric Logical Unit Access (ALUA) ???????? ???????????? SPC-3, ? ????? ? ????????? ?????????, ??????????? ? ?????? «Active/Active».

?????? ?????? Microsoft MPIO DSM

Microsoft Multipath I/O DSM ????????? ???????????? ????????? ?????? ????????????. ????????, ??? ??????????? ???????????? ??? ??? ??6?? ????? ???????, ? ?????? ???????, ?? ?????????? ???????????? ??????????? — ALUA ??? Active/Active — ? ???????????? ???????? ?????????. ?????????? ??? ??????.

  • Failover. ?? ?????????? ??????? ????????????. ??????????? ???????? (?????????) ???? ? ????????? ????????? (?????????) ?????. ??? ???????? ? ???????? ?????????? ?????????????? ?? ?????????? ????. ? ?????? ??? ?????? ?? ????? (????????????? ?????? ?? ????? ????) ??????? ???????? ???????????? ???? ?? ????????? ?????. ????????? ???? ??????????? ? ??????? ?????????? ?????????? ?? ?????????????, ??????? ?????? ? ???????? ?????????????????.
  • Failback. ?????, ??????????? ??????? ???????? ???????????????? ????. ? ?????? ?????? ??? ?? ????? ???????????? ?????? ????. ??????, ??? ?????? ???????? ????????? ????? ???????? ?? ????????????????? ????, ??????? ???????????? ? ??? ?????????????.
  • Round-robin. ?????, ????? DSM ?????????? ??? ????????? ???? ?? ??????? ??? ????????????.
  • Round-robin with subset of paths. ?????, ??????????? ??????? ????????? ?????, ???????????? ??? ????????? ? ?????? Round-robin, ? ????? ??????? ???? ??? ????????? ????????? ?????. ???? ???????? ???? ?? ???? ?? ????????? ?????, ??????? ?????????? ?? ? ???????????? round-robin. ??? ??????????? ???? ????????? ?????, ??????? ?????????? ???? ?? ??? ? ??????? ?????????? ??????????. ??? ?????? ???? ?? ???? ?? ???????? ????? ?????????? ????? ????????, ??????? ???????????? ? ????????????? ???????????? ?? ??????????????? ???????? ?????.
  • Dynamic Least Queue Depth. DSM ?????????? ??????? ?? ??? ????, ??????? ? ????????? ?????? ????? ?????????? ?????????? ???????? ? ??????? ?? ??????????.
  • Weighted Path. ???????? ????????? ??????? ???? ????? ??? (?????????), ???????????? ????????????? ????????? ????????????? ??????? ????. ??? ?????? ???, ??? ???? ?????????. DSM ???????? ??? ???????? ????????? ???? ? ?????????? ?????.
  • Least Block (?????? ? Windows Server 2008 R2). ?????, ???????????? I/O ??????? ?? ??? ????, ? ??????? ???????? ?? ???????? ????? ?????????? ????? ?????? ??????.

? Windows Server 2008 R2 ?? ????????? ??? ???????????? Active/Active ?????????? ????? Round-robin, ? ??? ???????????? ALUA SPC-3 ?????????? ????? Failover. ? Windows Server 2008 ?? ????????? ?????? ???????????? ????? Failover.

?????? ? Server Core

??? ????????? Microsoft Multipath I/O ? Server Core ??????? ??????????????? ????? ?? ????????? ??????.

  • start /wait "%SystemRoot%\System32\OCSetup.exe" MultipathIo (??? Windows Server 2008);
  • "%SystemRoot%\System32\DISM.exe" /Online /Enable-Feature:"MultipathIo" (??? Windows Server 2008 R2);
  • Add-WindowsFeature -name "Multipath-IO" (??? Windwos Server 2008 R2 ? ????????????? Windows PowerShell ? ??????????????? ??????? ServerManager).

??? ????????? ?? ????????? ?????? ???????????? ??????? "%SystemRoot%\System32\MPClaim.exe". ????????? ??????? ???????? ???????? ???:

"%SystemRoot%\System32\MPClaim.exe" restart_option install_switch device_switch device_hwid

?????????? ??????? ????????????? ??????? ????? ?? ????????? TechNet.

????? ????, ? Windows Server 2008 R2 ????? ????????? ??????????? ??????? ???????? "%SystemRoot%\System32\MPIOCPL.exe".

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