My understanding of reallocate is that it will put a definite load on your filer and shouldn't be run during prime time.
----- Original Message ----- From: owner-toasters@mathworks.com owner-toasters@mathworks.com To: 'Page, Jeremy' jeremy.page@gilbarco.com; toasters@mathworks.com toasters@mathworks.com Sent: Thu Jun 05 10:57:12 2008 Subject: RE: How to identify a hot disk
It’s good you are at 50% aggr usage, as you’ll need 50% free space in each volume you run the reallocate on. I think running the reallocate is the best first step as it is fairly un-intrusive and you can run it during the day unless you are hammering the filer constantly. When we run it we use the parameter –f to force reallocation without caring how well it is already laid out. Not sure about your question on A-SIS.
HTH,
- Hadrian
From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Page, Jeremy Sent: Thursday, June 05, 2008 7:13 AM To: toasters@mathworks.com Subject: RE: How to identify a hot disk
Thu Jun 5 10:06:02 EDT [gvr-array02: wafl.scan.layout.advise:info]: WAFL layout ratio for volume nfs2 is 4.01. A ratio of 1 is optimal. Based on your free space, 1.42 is expected.
Would you say I need to do a reallocate? I’m not sure why this is so fragmented, this file system has never been more then 50% full, could A-SIS have something to do with it?
Jeremy M. Page____________________
Systems Architect
* email:Jeremy.Page@gilbarco.com - ( phone: 336.547.5399 - 6 fax: 336.547.5163 - ( cell: 336.601.7274
________________________________
From: Uddhav Regmi [mailto:uddhav.regmi@worldnet.att.net] Sent: Thursday, June 05, 2008 9:38 AM To: Page, Jeremy; toasters@mathworks.com Subject: RE: How to identify a hot disk
hmmm
very interesting....
looks like those are max out
do wafl scan measure layout and see where you stand....
if needed do reallocate.....
I have seen hundreds of cases where it helped a lot
-uddhav
From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Page, Jeremy Sent: Thursday, June 05, 2008 8:27 AM To: toasters@mathworks.com Subject: Re: How to identify a hot disk
Not sure why but I have two disks that are maxed out while the rest are far lower utilization. What would cause this, the raid groups where created all at the same time, there are 10 disks per raid group and 3 groups in the aggragate.
/aggr0/plex0/rg0:
1c.16 2 0.94 0.18 1.00 42250 0.49 12.18 1396 0.27 11.83 521 0.00 .... . 0.00 .... .
1c.32 6 2.56 0.49 1.00 104545 1.80 4.18 1323 0.27 11.83 634 0.00 .... . 0.00 .... .
1c.48 98 116.05 114.20 1.62 18481 1.53 4.24 1743 0.31 11.00 2649 0.00 .... . 0.00 .... .
1c.17 41 55.21 54.76 2.17 5697 0.27 20.17 1537 0.18 16.25 600 0.00 .... . 0.00 .... .
1c.33 49 72.07 71.62 1.84 4760 0.27 20.67 871 0.18 16.75 1239 0.00 .... . 0.00 .... .
1c.49 45 61.42 60.97 2.18 4047 0.22 23.00 913 0.22 14.40 931 0.00 .... . 0.00 .... .
1c.64 5 117.40 116.86 1.61 307 0.36 15.25 1336 0.18 18.00 319 0.00 .... . 0.00 .... .
1c.65 4 71.76 71.17 1.83 292 0.27 20.67 1298 0.31 10.43 370 0.00 .... . 0.00 .... .
1c.80 4 49.50 49.05 2.36 333 0.22 22.80 1333 0.22 14.60 712 0.00 .... . 0.00 .... .
1c.81 5 95.14 94.69 1.71 292 0.22 22.80 1325 0.22 14.60 548 0.00 .... . 0.00 .... .
/aggr0/plex0/rg1:
1c.66 1 0.67 0.00 .... . 0.31 19.29 1311 0.36 10.50 238 0.00 .... . 0.00 .... .
1c.83 1 0.67 0.00 .... . 0.31 19.29 1415 0.36 10.50 190 0.00 .... . 0.00 .... .
1c.82 4 48.60 48.24 2.21 320 0.22 22.80 1553 0.13 21.33 234 0.00 .... . 0.00 .... .
1c.19 51 67.89 67.44 1.92 5315 0.22 22.80 1281 0.22 13.20 788 0.00 .... . 0.00 .... .
1c.18 55 72.75 72.34 1.90 4996 0.22 23.00 1122 0.18 16.00 1109 0.00 .... . 0.00 .... .
1c.35 30 36.10 35.52 2.67 3190 0.31 15.86 1802 0.27 11.33 588 0.00 .... . 0.00 .... .
1c.34 41 52.97 52.43 2.04 4207 0.31 16.29 1570 0.22 13.60 750 0.00 .... . 0.00 .... .
1c.51 100 119.82 119.46 1.57 25873 0.22 22.80 1588 0.13 21.33 2313 0.00 .... . 0.00 .... .
1c.50 59 72.03 71.44 1.83 7750 0.27 19.33 1233 0.31 10.86 1289 0.00 .... . 0.00 .... .
1c.67 4 94.60 94.15 1.68 279 0.18 24.50 1071 0.27 12.33 338 0.00 .... . 0.00 .... .
/aggr0/plex0/rg2:
1c.85 1 0.94 0.00 .... . 0.54 12.00 1806 0.40 10.11 538 0.00 .... . 0.00 .... .
1c.84 1 0.94 0.00 .... . 0.54 12.00 1729 0.40 10.11 495 0.00 .... . 0.00 .... .
1c.21 47 67.40 66.90 1.86 4701 0.27 19.17 1452 0.22 14.20 845 0.00 .... . 0.00 .... .
1c.20 56 73.56 73.02 1.79 4866 0.18 25.50 1039 0.36 9.63 870 0.00 .... . 0.00 .... .
1c.37 51 68.79 68.21 1.76 6072 0.27 19.17 1174 0.31 11.43 988 0.00 .... . 0.00 .... .
1c.36 42 50.85 50.18 2.31 3807 0.40 12.78 1852 0.27 13.33 800 0.00 .... . 0.00 .... .
1c.53 59 75.85 75.18 1.86 5024 0.36 14.25 2237 0.31 10.43 493 0.00 .... . 0.00 .... .
1c.52 18 21.27 20.77 3.83 2205 0.27 19.17 1496 0.22 14.20 465 0.00 .... . 0.00 .... .
1c.69 5 71.76 71.00 1.96 296 0.40 12.78 2087 0.36 9.63 610 0.00 .... . 0.00 .... .
1c.68 5 71.58 71.13 1.84 352 0.22 23.60 1314 0.22 14.80 514 0.00 .... . 0.00 .... .
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