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.\" |
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.\" |
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.\" $FreeBSD$ |
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.\" $FreeBSD$ |
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.\" |
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.\" |
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.Dd July 18, 2015 |
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.Dd September 8, 2016 |
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.Dt GMULTIPATH 8 |
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.Dt GMULTIPATH 8 |
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.Os |
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.Os |
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.Sh NAME |
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.Sh NAME |
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in a list is selected as active and the failed I/O reissued. |
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in a list is selected as active and the failed I/O reissued. |
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In Active/Active mode all paths not marked FAIL may handle I/O at the same time. |
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In Active/Active mode all paths not marked FAIL may handle I/O at the same time. |
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Requests are distributed between paths to equalize load. |
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Requests are distributed between paths to equalize load. |
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For capable devices it allows to utilize the bandwidth of all paths. |
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For capable devices it allows the utilisation of the bandwidth available on all paths. |
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In Active/Read mode all paths not marked FAIL may handle reads at the same time, |
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In Active/Read mode all paths not marked FAIL may handle reads at the same time, |
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but unlike in Active/Active mode only one path handles write requests at any |
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but unlike in Active/Active mode only one path handles write requests at any |
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point in time. |
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point in time; closely following the original write request order if the layer |
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It allows to closer follow the original write request order if the layer above |
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above needs it for data consistency (not waiting for requisite write completion |
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needs it for data consistency (not waiting for requisite write completion |
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before sending dependent write). |
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before sending dependent write). |
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.Pp |
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.Pp |
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When new devices are added to the system the |
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When new devices are added to the system the |
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.Xr mount 8 , |
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.Xr mount 8 , |
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.Xr newfs 8 , |
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.Xr newfs 8 , |
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.Xr sysctl 8 |
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.Xr sysctl 8 |
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.Sh HISTORY |
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The |
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.Nm |
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utility first appeared in |
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.Fx 7.0 |
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.Sh AUTHORS |
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.Sh AUTHORS |
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.An Matthew Jacob Aq Mt mjacob@FreeBSD.org |
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.An Matthew Jacob Aq Mt mjacob@FreeBSD.org |
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.An Alexander Motin Aq Mt mav@FreeBSD.org |
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.An Alexander Motin Aq Mt mav@FreeBSD.org |