On 16 March 2010 19:31, Troels Arvin <[email protected]> wrote: > > - Is there a way to adjust queue depths without unloading the > qla2xxx kernel module? >
I believe so, eg: echo 128 > /sys/module/qla2xxx/parameters/ql2xmaxqdepth (In general the files under /sys/module/<module>/parameters that are writeable are those than can be changed dynamically.) > - If I set the queue depth to 128, is that > - 128 in total for all devices handled by the qla2xxx > module?, or > - 128 for each HBA? (256 in total), or > - each of the eight /dev/sdX devices (1024 in toal)?, or > - each of the two /dev/mpath/... devices (256 in total)? > This is important for me to know so that my server doesn't > flood the storage system, affecting other servers connected > to it. > > modinfo qla2xxx says (among other things): ql2xmaxqdepth:Maximum queue depth to report for target devices. I believe that each target corresponds to a /dev/sdX rather than each multiply-connected LUN. jch
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