On 10/04/17 13:27, Marian Csontos wrote:
On 04/10/2017 01:16 PM, lejeczek wrote:
I had 3 stripe LV, you know, three PVs, and wanted the LV
to have 4
stripes, wanted to add 4th PV, you can see it from above
lvdisplay.
What you want is "reshape" not extend. This was committed
as RAID feature to 2.02.169, but it is still somewhat
experimental. You would need to convert stripe LV to RAID0
(aka takeover) and then reshape.
thanks, I see it more clearly now.
Is it possible to get rid of that second segment now? Have
the LV prior to extension?
I tried these and each time it errored:
$ lvextend -v -i 4 -l+100%free dellH200.InternalB/0
$ lvextend -v -i 4 -l+100%pv dellH200.InternalB/0 /dev/sdf
$ lvextend -i 4 -l 100%vg dellH200.InternalB/0
lvextend With -i 4 this would add another striped segment
with 4 devices after the first segment - and IIUC you do
not have enough space for that.
I did have only one segment, an LV spanning 100%vg with
100%each-pv.
And the above is the result of: $ lvextend -i 1 -l +100%free
dellH200.InternalB/0 /dev/sdf
so, either I'm not getting it right or a stripped LV
cannot be extended
this way - then: is there performance penalty with
segments like above
vs one stripped
segment?
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