# reduce vtu file data, time series and non-topological change
**URL:** https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894
**Category:** ParaView Support
**Tags:** vtk
**Created:** [March 26, 2020, 3:27pm UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894 "2020-03-26T15:27:13Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@jaekwangjk12](https://discourse.paraview.org/u/jaekwangjk12)
#### Post date: [March 26, 2020, 3:27pm UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894/1 "2020-03-26T15:27:13Z")
Hi all.
I am generating time-series data which does not have any topological change.
my vtu file is looks like below.
In a set of data files, Grid Point, Cells (Type, Connectivity etc…) need not be change,
but they still exist so that my data files has a lot of redundancies.
Is there any way that I can make my \*.vtu files reduce its size (as a whole set) effectively?
Thanks!
Jaekwang
> **VTU file contents**
>
> ```xml 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 0.720446 0.720446 0.720446 0.720446 0.720446 0.720446 0.720446 1.06636 1.06636 1.06636 1.06636 0.720446 0.720446 0 0 0 0.1 0 0 0.2 0 0 0.3 0 0 0.4 0 0 0.5 0 0 0.6 0 0 0.7 0 0 0.8 0 0 0.9 0 0 0 0.1 0 0.1 0.1 0 0.2 0.1 0 0.3 0.1 0 0.4 0.1 0 0.5 0.1 0 0.6 0.1 0 0.7 0.1 0 0.8 0.1 0 0.9 0.1 0 0 0.2 0 0.1 0.2 0 0.2 0.2 0 0.3 0.2 0 0.4 0.2 0 0.5 0.2 0 0.6 0.2 0 0.7 0.2 0 0.8 0.2 0 0.9 0.2 0 0 0.3 0 0.1 0.3 0 0.2 0.3 0 0.3 0.3 0 0.4 0.3 0 0.5 0.3 0 0.6 0.3 0 0.7 0.3 0 0.8 0.3 0 0.9 0.3 0 0 0.4 0 0.1 0.4 0 0.2 0.4 0 0.3 0.4 0 0.4 0.4 0 0.5 0.4 0 0.6 0.4 0 0.7 0.4 0 0.8 0.4 0 0.9 0.4 0 0 0.5 0 0.1 0.5 0 0.2 0.5 0 0.3 0.5 0 0.4 0.5 0 0.5 0.5 0 0.6 0.5 0 0.7 0.5 0 0.8 0.5 0 0.9 0.5 0 0 0.6 0 0.1 0.6 0 0.2 0.6 0 0.3 0.6 0 0.4 0.6 0 0.5 0.6 0 0.6 0.6 0 0.7 0.6 0 0.8 0.6 0 0.9 0.6 0 0 0.7 0 0.1 0.7 0 0.2 0.7 0 0.3 0.7 0 0.4 0.7 0 0.5 0.7 0 0.6 0.7 0 0.7 0.7 0 0.8 0.7 0 0.9 0.7 0 0 0.8 0 0.1 0.8 0 0.2 0.8 0 0.3 0.8 0 0.4 0.8 0 0.5 0.8 0 0.6 0.8 0 0.7 0.8 0 0.8 0.8 0 0.9 0.8 0 0 0.9 0 0.1 0.9 0 0.2 0.9 0 0.3 0.9 0 0.4 0.9 0 0.5 0.9 0 0.6 0.9 0 0.7 0.9 0 0.8 0.9 0 0.9 0.9 0 0 1 11 10 1 2 12 11 2 3 13 12 3 4 14 13 4 5 15 14 5 6 16 15 6 7 17 16 7 8 18 17 8 9 19 18 10 11 21 20 11 12 22 21 12 13 23 22 13 14 24 23 14 15 25 24 15 16 26 25 16 17 27 26 17 18 28 27 18 19 29 28 20 21 31 30 21 22 32 31 22 23 33 32 23 24 34 33 24 25 35 34 25 26 36 35 26 27 37 36 27 28 38 37 28 29 39 38 30 31 41 40 31 32 42 41 32 33 43 42 33 34 44 43 34 35 45 44 35 36 46 45 36 37 47 46 37 38 48 47 38 39 49 48 40 41 51 50 41 42 52 51 42 43 53 52 43 44 54 53 44 45 55 54 45 46 56 55 46 47 57 56 47 48 58 57 48 49 59 58 50 51 61 60 51 52 62 61 52 53 63 62 53 54 64 63 54 55 65 64 55 56 66 65 56 57 67 66 57 58 68 67 58 59 69 68 60 61 71 70 61 62 72 71 62 63 73 72 63 64 74 73 64 65 75 74 65 66 76 75 66 67 77 76 67 68 78 77 68 69 79 78 70 71 81 80 71 72 82 81 72 73 83 82 73 74 84 83 74 75 85 84 75 76 86 85 76 77 87 86 77 78 88 87 78 79 89 88 80 81 91 90 81 82 92 91 82 83 93 92 83 84 94 93 84 85 95 94 85 86 96 95 86 87 97 96 87 88 98 97 88 89 99 98 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124 128 132 136 140 144 148 152 156 160 164 168 172 176 180 184 188 192 196 200 204 208 212 216 220 224 228 232 236 240 244 248 252 256 260 264 268 272 276 280 284 288 292 296 300 304 308 312 316 320 324 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 ```
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### Author:  [@ben.boeckel](https://discourse.paraview.org/u/ben.boeckel)
#### Post date: [March 26, 2020, 3:30pm UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894/2 "2020-03-26T15:30:16Z")
I’ve approved the topic, moved it to `ParaView Support` rather than `Tip & Tricks` and made your content easier to read. I suggest uploading a file rather than copy/pasting such large content in the future.
As for pruning unnecessary information… @mwestphal?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 27, 2020, 2:46am UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894/3 "2020-03-27T02:46:16Z")
Not supported by the .vtu format sadly.
You can try other formats available in Save Data. Also make sure to enable compression and binary mode.
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### Author:  [@jaekwangjk12](https://discourse.paraview.org/u/jaekwangjk12)
#### Post date: [March 27, 2020, 5:49pm UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894/4 "2020-03-27T17:49:25Z")
Thanks for the reply.
I have just one short questions on your suggestions.
Do `compression" and `binary" mean same concept? I have considered using binary before, but haven’t heard of enable compression option.
Thanks.
Jaekwang
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 30, 2020, 2:02am UTC](https://discourse.paraview.org/t/reduce-vtu-file-data-time-series-and-non-topological-change/3894/5 "2020-03-30T02:02:28Z")
they are not the same concept.
To use binary, switch the `Data Mode` to `Appended` or `Binary`
To use the stronger compression, switch the `compressor type` to `LZMA` and the `compression level` to 9
Just let your mouse one second on a parameter to show a tooltip that will give you any infos you may need.