[Linux-cluster] live & standby (primary & secondary partitions) in "multipath -ll"

[sunhux G]

Hi,


Below is a listing of "multipath -ll" which are the same across
both our RAC servers (as the bindings file are identical).

Currently our NetApp Filer1's load is very heavy while Filer2
is underutilized

Question 1:
a) how do we find out which of the device files /dev/sd*
    go to NetApp SAN Filer1 & which to Filer2 (we have 2
    NetApp files)?


b)on the lines below with "round robin", what does "enabled"
    & "active" mean or what's the difference?  Does "active"
    refers to the primary path it goes to & when the primary
    filer fails, then only secondary filer took over?

=========================================

Multipath -ll    output :

mpath2 (360a980005672443963344933706f536c)
[size=40 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:3 sdq 65:0   [active][ready]      **
 \_ 8:0:3:3 sdw 65:96  [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:3 sde 8:64   [active][ready]
 \_ 8:0:1:3 sdk 8:160  [active][ready]

mpath1 (360a9800056724439633449336c786d69)
[size=5 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:4 sdr 65:16  [active][ready]      **
 \_ 8:0:3:4 sdx 65:112 [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:4 sdf 8:80   [active][ready]
 \_ 8:0:1:4 sdl 8:176  [active][ready]

mpath0 (360a98000567244396334493370345055)
[size=5 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:5 sds 65:32  [active][ready]      **
 \_ 8:0:3:5 sdy 65:128 [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:5 sdg 8:96   [active][ready]
 \_ 8:0:1:5 sdm 8:192  [active][ready]

mpath5 (360a9800056724439633449336c4d6b36)
[size=40 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:1 sdo 8:224  [active][ready]      **
 \_ 8:0:3:1 sdu 65:64  [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:1 sdc 8:32   [active][ready]
 \_ 8:0:1:1 sdi 8:128  [active][ready]

mpath4 (360a980005672443963344933706b4770)
[size=40 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:2 sdp 8:240  [active][ready]      **
 \_ 8:0:3:2 sdv 65:80  [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:2 sdd 8:48   [active][ready]
 \_ 8:0:1:2 sdj 8:144  [active][ready]

mpath3 (360a9800056724439633449336c514c75)
[size=40 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [prio=8][active]
 \_ 8:0:2:0 sdn 8:208  [active][ready]      **
 \_ 8:0:3:0 sdt 65:48  [active][ready]      **
\_ round-robin 0 [prio=2][enabled]
 \_ 8:0:0:0 sdb 8:16   [active][ready]
 \_ 8:0:1:0 sdh 8:112  [active][ready]
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