[Gllug] Constrained virtual machines
Jim Bailey
jim at freesolutions.net
Wed Dec 13 12:36:37 UTC 2006
On Dec 01, 10:57, Karanbir Singh wrote:
> Richard Huxton wrote:
> >James Roberts wrote:
> >>Karanbir Singh wrote:
> >>>does vmware-server ( also, like vmware-player, free to download and
> >>>use ) not meet your requirement ?
> >>
> >>I think he has got that already. He wants fine-grained cpu and other
> >>resource control for testing. vmware-server only offers very crude cpu
> >>control (1 processor, 2 processors...) although the memory allocated
> >>can be fine-grained.
> >
> >Yeah - what I'd like to be able to do is have a virtual-machine limited
> >to e.g. the speed of a 1GHz P4 with 512MB RAM and something that looks
> >like a single IDE disk. And then change all those parameters on the next
> >test run. And it needs to be *all* of them, otherwise the tests will be
> >unbalanced.
> >
>
> you are not going to get such exact throttling controls anywhere ( that
> i am aware of ), but your closest match is going to be Xen.
I would say that OpenVZ and its big commercial cousin Virtuozzo can give
you almost all the control you need. The sticking point I guess being
disk IO.
A proc file will give you output like this so you can watch it die.
You can also manage CPU throttling network rate limiting and other bits
and bobs from the hardware node. Also vzstat give a very nice running
commentary on the state of your box.
root at debian-r100-test-1:/# cat /proc/user_beancounters
Version: 2.5
uid resource held maxheld barrier limit
failcnt
114: kmemsize 2959861 2963837 22111846 22754099
0
lockedpages 0 0 512 512
0
privvmpages 59963 59971 2147483647 2147483647
0
shmpages 2564 2564 43008 43008
0
dummy 0 0 0 0
0
numproc 57 57 480 480
0
physpages 11500 11500 0 2147483647
0
vmguarpages 0 0 67584 2147483647
0
oomguarpages 12957 12957 52224 2147483647
0
numtcpsock 16 17 720 720
0
numflock 14 14 376 412
0
numpty 1 1 32 32
0
numsiginfo 0 0 512 512
0
tcpsndbuf 8912 11832 3440640 5406720
0
tcprcvbuf 0 0 3440640 5406720
0
othersockbuf 21692 21692 2252160 4194304
0
dgramrcvbuf 166772 166772 524288 524288
0
numothersock 19 19 720 720
0
dcachesize 382355 382929 7170240 7249920
0
numfile 1113 1114 18624 18624
0
dummy 0 0 0 0
0
dummy 0 0 0 0
0
dummy 0 0 0 0
0
numiptent 14 14 256 256
0
12:32pm, up 105 days, 1:55, 0 users, load average: 1.11, 1.32, 1.57
VENum 18, procs 1342: R 1, S 1341, D 0, Z 0, T 0, X 0
CPU [ OK ]: VEs 33%, VE0 0%, user 6%, sys 2%, idle 92%, lat(ms)
6/0
Mem [ OK ]: total 3799MB, free 157MB/756MB (low/high), lat(ms) 0/0
ZONE0 (DMA): size 16MB, act 0MB, inact 0MB, free 4MB (0/0/0)
ZONE1 (Normal): size 816MB, act 65MB, inact 32MB, free 152MB (0/1/2)
ZONE2 (HighMem): size 3007MB, act 2029MB, inact 184MB, free 756MB
(0/1/1)
Mem lat (ms): A0 0, K0 0, U0 0, K1 0, U1 0
Slab pages: 524MB/523MB (ino 257MB, de 156MB, bh 10MB, pb 20MB)
Swap [ OK ]: tot 8001MB, free 7342MB, in 0.000MB/s, out 0.000MB/s
Net [ OK ]: tot: in 0.022MB/s 180pkt/s, out 0.142MB/s 211pkt/s
lo: in 0.000MB/s 0pkt/s, out 0.000MB/s 0pkt/s
eth0: in 0.022MB/s 180pkt/s, out 0.142MB/s 211pkt/s
eth1: in 0.000MB/s 0pkt/s, out 0.000MB/s 0pkt/s
Disks [ OK ]: in 0.066MB/s, out 0.389MB/s
VEID ST %VM %KM PROC CPU SOCK FCNT MLAT IP
1 OK 3.8/27 0.4/1.9 0/55/256 0.0/5.0 110/1512 0 0
xx.xx.xx.xx
103 OK 8.8/220772 0.4/2.7 0/55/480 0.4/5.0 40/1440 0 1
xx.xx.xx.xx
114 OK 6.2/220772 0.3/2.7 0/54/480 0.3/5.0 34/1440 0 2
xx.xx.xx.xx
119 OK 9.2/13 0.5/2.7 0/73/480 1.6/5.0 49/1440 0 1
xx.xx.xx.xx
153 OK 9.6/220772 0.6/1.3 0/78/240 1.2/5.0 60/720 0 1
xx.xx.xx.xx
161 OK 0.4/220772 0.1/0.3 0/14/65 0.0/5.0 9/160 0 0
xx.xx.xx.xx
183 OK 9.6/220772 0.5/1.3 0/59/240 0.4/5.0 41/720 0 1
xx.xx.xx.xx
202 OK 3.2/220772 0.4/259 0/53/32567 0.0/5.0 44/4294967294 0 0
xx.xx.xx.xx
212 OK 11/220772 0.3/259 0/42/32567 0.0/5.0 27/4294967294 0 0
xx.xx.xx.xx
217 OK 4.1/220772 0.4/259 0/47/32567 0.3/5.0 43/4294967294 0 1
xx.xx.xx.xx
222 OK 5.9/220772 0.6/259 0/71/32567 1.2/5.0 74/4294967294 0 1
xx.xx.xx.xx
224 OK 1.7/220772 0.2/259 0/29/32567 0.0/5.0 32/4294967294 0 0
xx.xx.xx.xx
282 OK 12/220772 0.6/259 0/99/32567 0.0/5.0 128/4294967294 0
0 xx.xx.xx.xx
290 OK 6.5/220772 0.7/1.2 0/78/300 1.9/5.0 82/600 0 6
xx.xx.xx.xx
292 OK 6.9/220772 0.7/1.8 0/92/300 0.6/5.0 77/600 0 2
xx.xx.xx.xx
300 OK 3.7/220772 0.3/1.1 0/36/600 0.2/10 42/2147484247 0 1
xx.xx.xx.xx
352 OK 53/220772 0.6/1.1 0/174/600 0.2/10 107/1200 0 2
xx.xx.xx.xx
369 OK 7.4/220772 0.4/1.2 0/51/300 0.0/5.0 40/600 0 0
xx.xx.xx.xx
--
Peace Jim :-)
Computers make very fast, very accurate mistakes.
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