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breach_sb_4ways.ipynb
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"# Compare four ways to read COAWST coastal model output\n",
"Matanzas Inlet Breach simulation.\n",
"Try reading:\n",
"* NetCDF4 file on S3 with h5netcdf library (HDF5 library)\n",
"* NetCDF4 file on S3 with zarr library, using fsspec's FileReferenceSystem\n",
"* Zarr dataset on S3 with consolidated metadata\n",
"* Zarr dataset on S3 with unconsolidated metadata"
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "frozen-flush",
"metadata": {},
"outputs": [],
"source": [
"import xarray as xr\n",
"import fsspec"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "variable-academy",
"metadata": {},
"outputs": [],
"source": [
"fs0 = fsspec.filesystem('s3', anon=True) # USGS ScienceBase Bucket, us-west-2\n",
"fs1 = fsspec.filesystem('s3', requester_pays=True, profile='esip-qhub') # ESIP Bucket, us-west-2"
]
},
{
"cell_type": "markdown",
"id": "toxic-joint",
"metadata": {},
"source": [
"#### NetCDF4 file on S3 with h5netcdf library"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "configured-stewart",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 5.09 s, sys: 1.09 s, total: 6.18 s\n",
"Wall time: 13 s\n"
]
}
],
"source": [
"%%time\n",
"fo = 's3://prod-is-usgs-sb-prod-publish/609bf69ed34ea221ce39b261/breach_matanzas.nc'\n",
"ds = xr.open_dataset(fs0.open(fo), decode_timedelta=False, engine='h5netcdf')"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "nearby-juvenile",
"metadata": {},
"outputs": [
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"name": "stdout",
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"text": [
"CPU times: user 3.81 s, sys: 951 ms, total: 4.76 s\n",
"Wall time: 6.65 s\n"
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"</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;zeta&#x27; ()&gt;\n",
"array(0.87491935, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'zeta'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-9b2f3d62-535e-435b-b038-251ece6b9698' class='xr-array-in' type='checkbox' checked><label for='section-9b2f3d62-535e-435b-b038-251ece6b9698' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>0.8749</span></div><div class='xr-array-data'><pre>array(0.87491935, dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-77e0bc3d-5333-4f35-8e38-72a9563f5424' class='xr-section-summary-in' type='checkbox' checked><label for='section-77e0bc3d-5333-4f35-8e38-72a9563f5424' class='xr-section-summary' >Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>29.69</div><input id='attrs-e95efee5-b8c7-4e33-8ba9-9807b64ed763' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-e95efee5-b8c7-4e33-8ba9-9807b64ed763' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-eb5a4299-4dad-4e67-966c-bc2925a9b645' class='xr-var-data-in' type='checkbox'><label for='data-eb5a4299-4dad-4e67-966c-bc2925a9b645' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lat_rho, scalar</dd><dt><span>long_name :</span></dt><dd>latitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>units :</span></dt><dd>degree_north</dd></dl></div><div class='xr-var-data'><pre>array(29.69330668)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-81.21</div><input id='attrs-faa68341-ddcb-4f91-a6cf-ac261b4924d4' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-faa68341-ddcb-4f91-a6cf-ac261b4924d4' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-38de8df7-31ca-4809-a28e-9c628c7cada3' class='xr-var-data-in' type='checkbox'><label for='data-38de8df7-31ca-4809-a28e-9c628c7cada3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lon_rho, scalar</dd><dt><span>long_name :</span></dt><dd>longitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>units :</span></dt><dd>degree_east</dd></dl></div><div class='xr-var-data'><pre>array(-81.2086787)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-3d852f86-8551-4d23-bb83-97c4693f47bf' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-3d852f86-8551-4d23-bb83-97c4693f47bf' class='xr-section-summary' title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
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"<xarray.DataArray 'zeta' ()>\n",
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" lon_rho float64 -81.21"
]
},
"execution_count": 4,
"metadata": {},
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"source": [
"%%time\n",
"ds.zeta[:,200,200].mean().compute()"
]
},
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"cell_type": "markdown",
"id": "recreational-correlation",
"metadata": {},
"source": [
"#### Read NetCDF file on S3 using ReferenceFileSystem metadata with Zarr library"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "wooden-hayes",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 536 ms, sys: 49.8 ms, total: 586 ms\n",
"Wall time: 942 ms\n"
]
}
],
"source": [
"%%time\n",
"so = {\"anon\": True}\n",
"fo = \"s3://prod-is-usgs-sb-prod-publish/609bf69ed34ea221ce39b261/breach_matanzas_ReferenceFileSystem.json\"\n",
"fs = fsspec.filesystem(\"reference\", fo=fo, target_options=so,\n",
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"m = fs.get_mapper(\"\")\n",
"ds = xr.open_dataset(m, engine=\"zarr\", decode_timedelta=False)"
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "junior-karaoke",
"metadata": {},
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"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 2.77 s, sys: 723 ms, total: 3.49 s\n",
"Wall time: 3.53 s\n"
]
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"</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;zeta&#x27; ()&gt;\n",
"array(0.87491935, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'zeta'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-4c128f53-3ce7-4fae-8446-47e54bc41c8a' class='xr-array-in' type='checkbox' checked><label for='section-4c128f53-3ce7-4fae-8446-47e54bc41c8a' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>0.8749</span></div><div class='xr-array-data'><pre>array(0.87491935, dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-290d8ae4-f27a-466a-add5-7071d32dc6c3' class='xr-section-summary-in' type='checkbox' checked><label for='section-290d8ae4-f27a-466a-add5-7071d32dc6c3' class='xr-section-summary' >Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>29.69</div><input id='attrs-9e6f4a7a-16b4-4b16-b360-502db12e9248' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-9e6f4a7a-16b4-4b16-b360-502db12e9248' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-726a1602-5ac7-42a7-9438-785e71131bdb' class='xr-var-data-in' type='checkbox'><label for='data-726a1602-5ac7-42a7-9438-785e71131bdb' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>_Netcdf4Coordinates :</span></dt><dd>[2, 3]</dd><dt><span>_Netcdf4Dimid :</span></dt><dd>2</dd><dt><span>field :</span></dt><dd>lat_rho, scalar</dd><dt><span>long_name :</span></dt><dd>latitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>units :</span></dt><dd>degree_north</dd></dl></div><div class='xr-var-data'><pre>array(29.69330668)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-81.21</div><input id='attrs-0f46ee72-eb94-4ee8-af7c-f7fa4e992650' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-0f46ee72-eb94-4ee8-af7c-f7fa4e992650' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-d5e097b8-08fc-487c-a0ee-7809715e6439' class='xr-var-data-in' type='checkbox'><label for='data-d5e097b8-08fc-487c-a0ee-7809715e6439' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>_Netcdf4Coordinates :</span></dt><dd>[2, 3]</dd><dt><span>_Netcdf4Dimid :</span></dt><dd>2</dd><dt><span>field :</span></dt><dd>lon_rho, scalar</dd><dt><span>long_name :</span></dt><dd>longitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>units :</span></dt><dd>degree_east</dd></dl></div><div class='xr-var-data'><pre>array(-81.2086787)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-a80e48ea-9c46-4839-9623-f91f5a412a72' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-a80e48ea-9c46-4839-9623-f91f5a412a72' class='xr-section-summary' title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
],
"text/plain": [
"<xarray.DataArray 'zeta' ()>\n",
"array(0.87491935, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21"
]
},
"execution_count": 6,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"%%time\n",
"ds.zeta[:,200,200].mean().compute()"
]
},
{
"cell_type": "markdown",
"id": "driving-massachusetts",
"metadata": {},
"source": [
"#### Zarr Dataset on S3 with Zarr library (consolidated metadata)"
]
},
{
"cell_type": "code",
"execution_count": 7,
"id": "general-merchandise",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 228 ms, sys: 16 ms, total: 244 ms\n",
"Wall time: 635 ms\n"
]
}
],
"source": [
"%%time\n",
"ds = xr.open_zarr(fs1.get_mapper('esip-qhub/usgs/rsignell/zarr/breach_matanzas_GTM_inwave_b'),\n",
" decode_timedelta=False, consolidated=True)"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "returning-savannah",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 743 ms, sys: 497 ms, total: 1.24 s\n",
"Wall time: 924 ms\n"
]
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"</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;zeta&#x27; ()&gt;\n",
"array(0.8749193, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'zeta'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-8bbda979-4121-4188-b099-1021c34b67f1' class='xr-array-in' type='checkbox' checked><label for='section-8bbda979-4121-4188-b099-1021c34b67f1' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>0.8749</span></div><div class='xr-array-data'><pre>array(0.8749193, dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-02d65e34-4a58-47d4-af0b-a119dcdc19c5' class='xr-section-summary-in' type='checkbox' checked><label for='section-02d65e34-4a58-47d4-af0b-a119dcdc19c5' class='xr-section-summary' >Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>29.69</div><input id='attrs-cc45c07f-2362-47e7-85ba-2bd996a52833' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-cc45c07f-2362-47e7-85ba-2bd996a52833' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e8e8d4e1-b608-47d0-996f-90aeb8e18527' class='xr-var-data-in' type='checkbox'><label for='data-e8e8d4e1-b608-47d0-996f-90aeb8e18527' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lat_rho, scalar</dd><dt><span>long_name :</span></dt><dd>latitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>units :</span></dt><dd>degree_north</dd></dl></div><div class='xr-var-data'><pre>array(29.69330668)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-81.21</div><input id='attrs-742a7a26-e51f-43ef-9b57-3ca56fc4d1a6' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-742a7a26-e51f-43ef-9b57-3ca56fc4d1a6' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-849bce5d-a360-4d10-a1e5-1546c1edd4e9' class='xr-var-data-in' type='checkbox'><label for='data-849bce5d-a360-4d10-a1e5-1546c1edd4e9' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lon_rho, scalar</dd><dt><span>long_name :</span></dt><dd>longitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>units :</span></dt><dd>degree_east</dd></dl></div><div class='xr-var-data'><pre>array(-81.2086787)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-861c1be2-66de-4fc2-8cbd-760954723c58' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-861c1be2-66de-4fc2-8cbd-760954723c58' class='xr-section-summary' title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
],
"text/plain": [
"<xarray.DataArray 'zeta' ()>\n",
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]
},
"execution_count": 8,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"%%time\n",
"ds.zeta[:,200,200].mean().compute()"
]
},
{
"cell_type": "markdown",
"id": "stuffed-collection",
"metadata": {},
"source": [
"#### Zarr Dataset on S3 with Zarr library (unconsolidated metadata)"
]
},
{
"cell_type": "code",
"execution_count": 9,
"id": "about-prevention",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 2.05 s, sys: 119 ms, total: 2.17 s\n",
"Wall time: 15.1 s\n"
]
}
],
"source": [
"%%time\n",
"ds = xr.open_zarr(fs1.get_mapper('esip-qhub/usgs/rsignell/zarr/breach_matanzas_GTM_inwave_b'),\n",
" decode_timedelta=False, consolidated=False)"
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},
{
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"execution_count": 10,
"id": "harmful-blackjack",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"CPU times: user 731 ms, sys: 560 ms, total: 1.29 s\n",
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"\n",
".xr-var-item > div,\n",
".xr-var-item label,\n",
".xr-var-item > .xr-var-name span {\n",
" background-color: var(--xr-background-color-row-even);\n",
" margin-bottom: 0;\n",
"}\n",
"\n",
".xr-var-item > .xr-var-name:hover span {\n",
" padding-right: 5px;\n",
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"\n",
".xr-var-list > li:nth-child(odd) > div,\n",
".xr-var-list > li:nth-child(odd) > label,\n",
".xr-var-list > li:nth-child(odd) > .xr-var-name span {\n",
" background-color: var(--xr-background-color-row-odd);\n",
"}\n",
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"</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;zeta&#x27; ()&gt;\n",
"array(0.8749193, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'zeta'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-a708e7a2-e682-410c-b735-872f069b8e5d' class='xr-array-in' type='checkbox' checked><label for='section-a708e7a2-e682-410c-b735-872f069b8e5d' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>0.8749</span></div><div class='xr-array-data'><pre>array(0.8749193, dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-cdeb7474-1a2a-42a1-b34f-8589a0d5ae74' class='xr-section-summary-in' type='checkbox' checked><label for='section-cdeb7474-1a2a-42a1-b34f-8589a0d5ae74' class='xr-section-summary' >Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>29.69</div><input id='attrs-87143563-4d05-4be0-829e-4afcfd8a8e80' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-87143563-4d05-4be0-829e-4afcfd8a8e80' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-cec328f7-d24e-4481-a93a-7cd3c6df8acb' class='xr-var-data-in' type='checkbox'><label for='data-cec328f7-d24e-4481-a93a-7cd3c6df8acb' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lat_rho, scalar</dd><dt><span>long_name :</span></dt><dd>latitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>units :</span></dt><dd>degree_north</dd></dl></div><div class='xr-var-data'><pre>array(29.69330668)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon_rho</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-81.21</div><input id='attrs-a82a0f11-a3b1-4d64-b478-00d5ed54defc' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-a82a0f11-a3b1-4d64-b478-00d5ed54defc' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-faa54be1-c8db-441c-9a6d-2b10edd8aaf4' class='xr-var-data-in' type='checkbox'><label for='data-faa54be1-c8db-441c-9a6d-2b10edd8aaf4' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>field :</span></dt><dd>lon_rho, scalar</dd><dt><span>long_name :</span></dt><dd>longitude of RHO-points</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>units :</span></dt><dd>degree_east</dd></dl></div><div class='xr-var-data'><pre>array(-81.2086787)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-47e9ed98-01b0-4049-827f-8c91f992569c' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-47e9ed98-01b0-4049-827f-8c91f992569c' class='xr-section-summary' title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
],
"text/plain": [
"<xarray.DataArray 'zeta' ()>\n",
"array(0.8749193, dtype=float32)\n",
"Coordinates:\n",
" lat_rho float64 29.69\n",
" lon_rho float64 -81.21"
]
},
"execution_count": 10,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"%%time\n",
"ds.zeta[:,200,200].mean().compute()"
]
},
{
"cell_type": "markdown",
"id": "artificial-aberdeen",
"metadata": {},
"source": [
"### Conclusions \n",
"** based on this dataset **\n",
"* Opening the netCDF4 file on S3 with Zarr/ReferenceFileSystem is 10x faster than with HDF5 library\n",
"* Reading the netCDF4 file on S3 with Zarr/ReferenceFileSystem is 3-4x faster than with HDF5 library\n",
"* Opening and reading the same dataset written in Zarr format is still faster \n",
"* Opening the Zarr dataset with consolidated metadata is 10x faster\n",
"\n",
"### Future Work\n",
"* Try reading both NetCDF4 and Zarr with the new NetCDF4 (NetCDF C library) S3 reading capability\n"
]
}
],
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